Merge branch 'master' into feat/agc-run-preview-tip

scripts/build-gitea-rust-cache.sh

@@ -5,6 +5,15 @@ set -euo pipefail
 repo_root="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd -P)"
 base_ref="${1:?usage: build-gitea-rust-cache.sh <verified-base-image> <candidate-tag>}"
 candidate_tag="${2:?candidate image tag is required}"
+requested_source_commit="${3:-}"
+if [[ "$#" -gt 3 ]]; then
+  echo 'usage: build-gitea-rust-cache.sh <verified-base-image> <candidate-tag> [master-commit-sha]' >&2
+  exit 2
+fi
+if [[ -n "${requested_source_commit}" && ! "${requested_source_commit}" =~ ^[0-9a-fA-F]{40}$ ]]; then
+  echo 'master-commit-sha must be a complete 40-character SHA.' >&2
+  exit 2
+fi
 # 与实际 Gitea checkout 路径一致；Rust 对象 key 包含编译 cwd，不能随意换临时根。
 workspace=/workspace/GenarrativeAI/Genarrative
 [[ "${CI:-}" != true ]] || { echo 'Run on the trusted image builder, outside CI jobs.' >&2; exit 1; }
@@ -22,7 +31,17 @@ bash "${repo_root}/scripts/gitea-ci-job-image.sh" verify "${base_id}"
 
 # 只归档远端 master 的确定提交；不复制当前工作区或本地凭据。
 git -C "${repo_root}" fetch --no-tags origin refs/heads/master
-source_commit="$(git -C "${repo_root}" rev-parse FETCH_HEAD^{commit})"
+master_commit="$(git -C "${repo_root}" rev-parse FETCH_HEAD^{commit})"
+if [[ -n "${requested_source_commit}" ]]; then
+  git -C "${repo_root}" cat-file -e "${requested_source_commit}^{commit}"
+  if ! git -C "${repo_root}" merge-base --is-ancestor "${requested_source_commit}" "${master_commit}"; then
+    echo "master-commit-sha is not contained in fetched master: ${requested_source_commit}" >&2
+    exit 1
+  fi
+  source_commit="$(git -C "${repo_root}" rev-parse "${requested_source_commit}^{commit}")"
+else
+  source_commit="${master_commit}"
+fi
 work_dir="$(mktemp -d "${TMPDIR:-/tmp}/gitea-rust-cache.XXXXXX")"
 container_id=''
 cleanup() {
@@ -50,7 +69,7 @@ container_id="$(docker run --detach --cpus=4 --memory=12g --pids-limit=1024 \
 docker exec "${container_id}" mkdir -p "${workspace}" /opt/genarrative-ci/rust-cache/objects
 git -C "${repo_root}" archive "${source_commit}" | docker cp - "${container_id}:${workspace}"
 docker cp "${work_dir}/snapshot/." "${container_id}:/opt/genarrative-ci/rust-cache/"
-docker cp "${repo_root}/scripts/ci-rust-cache.sh" "${container_id}:/tmp/ci-rust-cache.sh"
+docker exec "${container_id}" cp "${workspace}/scripts/ci-rust-cache.sh" /tmp/ci-rust-cache.sh
 docker exec --interactive --workdir "${workspace}" "${container_id}" bash -s <<'WARM'
 set -euo pipefail
 rustc -vV > /opt/genarrative-ci/rust-cache/rustc.txt

scripts/check-release-origin-config.mjs

@@ -0,0 +1,272 @@
+#!/usr/bin/env node
+/**
+ * 游戏发行来源配置门禁。
+ *
+ * 逐条校验 `deploy/nginx/genarrative-release-origin.conf`：
+ *   1) 每游戏独立 origin 的按主机映射（命名捕获 `game_id` + 发行网关前缀）；
+ *   2) 只暴露发行网关，不代理平台 API / 后台 / SPA；
+ *   3) 发行来源不使用 Cookie（边缘 403 + 转发前清空）；
+ *   4) 响应头策略仍由 api-server 发行网关负责（源码级交叉检查）。
+ * 只要本机存在 nginx 与 openssl，还会用自签通配证书渲染一份临时配置执行
+ * `nginx -t`，把语法与指令上下文一起验证掉。
+ */
+import { execFileSync } from 'node:child_process';
+import {
+  existsSync,
+  mkdtempSync,
+  readFileSync,
+  rmSync,
+  writeFileSync,
+} from 'node:fs';
+import { tmpdir } from 'node:os';
+import { dirname, join } from 'node:path';
+import { fileURLToPath } from 'node:url';
+
+const scriptDir = dirname(fileURLToPath(import.meta.url));
+const repoRoot = join(scriptDir, '..');
+const templatePath = join(
+  repoRoot,
+  'deploy/nginx/genarrative-release-origin.conf',
+);
+const gatewayPath = join(
+  repoRoot,
+  'server-rs/crates/api-server/src/modules/game_distribution.rs',
+);
+
+const failures = [];
+const notes = [];
+
+function fail(message) {
+  failures.push(message);
+}
+
+function normalize(source) {
+  return source.replace(/\s+/gu, ' ');
+}
+
+function requireSnippet(source, snippet, message) {
+  if (!normalize(source).includes(normalize(snippet))) {
+    fail(message);
+  }
+}
+
+function main() {
+  if (!existsSync(templatePath)) {
+    fail(`缺少发行来源模板：${templatePath}`);
+    return;
+  }
+  const template = readFileSync(templatePath, 'utf8');
+
+  requireSnippet(
+    template,
+    'server_name ~^(?<game_id>[a-z0-9_]+)\\.games\\.example\\.com$;',
+    '发行来源必须用命名捕获 game_id 的子域匹配（每游戏独立 origin）',
+  );
+  requireSnippet(
+    template,
+    'ssl_certificate /etc/letsencrypt/live/games.example.com/fullchain.pem;',
+    '发行来源必须使用通配 TLS 证书',
+  );
+  requireSnippet(
+    template,
+    'if ($http_cookie) { return 403; }',
+    '发行来源必须拒绝携带平台 Cookie 的请求',
+  );
+  requireSnippet(
+    template,
+    'proxy_set_header Cookie "";',
+    '发行来源转发前必须清空 Cookie',
+  );
+  requireSnippet(
+    template,
+    'proxy_pass http://genarrative_release_api/api/game-distribution/releases/$game_id$request_uri;',
+    '发行来源必须按 game_id 映射到发行网关前缀',
+  );
+  requireSnippet(
+    template,
+    'location /.well-known/acme-challenge/',
+    '发行来源必须保留 ACME challenge 路径',
+  );
+
+  requireSnippet(
+    template,
+    'location = / {',
+    '发行来源必须显式把子域根路径映射为该游戏的 index.html',
+  );
+  requireSnippet(
+    template,
+    'proxy_pass http://genarrative_release_api/api/game-distribution/releases/$game_id/index.html;',
+    '子域根路径必须映射到该游戏的 index.html',
+  );
+  const proxyPassCount = (template.match(/proxy_pass\s/gu) ?? []).length;
+  if (proxyPassCount !== 2) {
+    fail(
+      `发行来源只应存在两条 proxy_pass（子域根路径与发行网关前缀），实际 ${proxyPassCount} 条`,
+    );
+  }
+  const cookieStripCount = (
+    template.match(/proxy_set_header Cookie "";/gu) ?? []
+  ).length;
+  if (cookieStripCount !== 2) {
+    fail(`每条发行来源代理都必须清空 Cookie，实际 ${cookieStripCount} 处`);
+  }
+  const gatewayPrefixCount = (
+    template.match(/api\/game-distribution\/releases\/\$game_id/gu) ?? []
+  ).length;
+  if (gatewayPrefixCount !== 2) {
+    fail(`发行来源代理必须都映射到发行网关前缀，实际 ${gatewayPrefixCount} 处`);
+  }
+  for (const forbidden of [
+    '/api/auth',
+    '/api/profile',
+    '/admin/api',
+    '/api/game-distribution/games',
+    '/api/game-distribution/versions',
+  ]) {
+    if (template.includes(forbidden)) {
+      fail(`发行来源不得代理平台命名空间：${forbidden}`);
+    }
+  }
+
+  if (!existsSync(gatewayPath)) {
+    fail(`缺少发行网关源码：${gatewayPath}`);
+  } else {
+    const gateway = readFileSync(gatewayPath, 'utf8');
+    for (const [snippet, message] of [
+      [
+        'header::X_CONTENT_TYPE_OPTIONS',
+        '发行网关必须继续设置 X-Content-Type-Options',
+      ],
+      [
+        'HeaderName::from_static("cross-origin-resource-policy")',
+        '发行网关必须继续设置 CORP',
+      ],
+      [
+        'HeaderValue::from_static("cross-origin")',
+        'CORP 必须是 cross-origin（opaque sandbox 才能加载自有脚本）',
+      ],
+      [
+        'header::ACCESS_CONTROL_ALLOW_ORIGIN',
+        '发行网关必须继续设置无凭据 CORS',
+      ],
+      ['header::CONTENT_SECURITY_POLICY', '发行网关必须继续为 HTML 设置 CSP'],
+      ['StatusCode::FORBIDDEN', '发行网关必须继续拒绝携带 Cookie 的请求'],
+    ]) {
+      if (!gateway.includes(snippet)) {
+        fail(message);
+      }
+    }
+  }
+
+  validateWithNginx(template);
+
+  if (failures.length > 0) {
+    console.error('[check:release-origin-config] FAILED');
+    for (const message of failures) {
+      console.error(`- ${message}`);
+    }
+    process.exit(1);
+  }
+  for (const note of notes) {
+    console.log(`[check:release-origin-config] ${note}`);
+  }
+  console.log(
+    '[check:release-origin-config] OK（发行来源模板、网关响应头策略与 nginx 语法一致）',
+  );
+}
+
+function binaryExists(binary) {
+  try {
+    execFileSync('sh', ['-c', `command -v ${binary}`], { stdio: 'ignore' });
+    return true;
+  } catch {
+    return false;
+  }
+}
+
+function validateWithNginx(template) {
+  if (!binaryExists('nginx')) {
+    notes.push('未找到 nginx，跳过渲染后的 nginx -t');
+    return;
+  }
+  const workDir = mkdtempSync(join(tmpdir(), 'genarrative-release-origin-'));
+  try {
+    const certPath = join(workDir, 'wildcard.crt');
+    const keyPath = join(workDir, 'wildcard.key');
+    if (binaryExists('openssl')) {
+      execFileSync(
+        'openssl',
+        [
+          'req',
+          '-x509',
+          '-newkey',
+          'rsa:2048',
+          '-nodes',
+          '-days',
+          '1',
+          '-subj',
+          '/CN=games.example.com',
+          '-addext',
+          'subjectAltName=DNS:*.games.example.com,DNS:games.example.com',
+          '-keyout',
+          keyPath,
+          '-out',
+          certPath,
+        ],
+        { stdio: 'ignore' },
+      );
+    } else {
+      notes.push('未找到 openssl，跳过渲染后的 nginx -t');
+      return;
+    }
+    const rendered = template
+      .replace(
+        '/etc/letsencrypt/live/games.example.com/fullchain.pem',
+        certPath,
+      )
+      .replace('/etc/letsencrypt/live/games.example.com/privkey.pem', keyPath)
+      .replace(
+        /\/var\/log\/nginx\/(genarrative-release\.[a-z]+\.log)/gu,
+        join(workDir, '$1'),
+      )
+      // 非 root 环境无法绑定 80/443；语法检查用高位端口，不改生产模板本身。
+      .replace('listen 80;', 'listen 18080;')
+      .replace('listen 443 ssl http2;', 'listen 18443 ssl http2;');
+    const renderedPath = join(workDir, 'release-origin.conf');
+    writeFileSync(renderedPath, rendered);
+    const wrapperPath = join(workDir, 'nginx.conf');
+    writeFileSync(
+      wrapperPath,
+      [
+        `pid ${join(workDir, 'nginx.pid')};`,
+        `error_log ${join(workDir, 'error.log')} warn;`,
+        'events { worker_connections 64; }',
+        'http {',
+        '    access_log off;',
+        '    client_body_temp_path ' + join(workDir, 'client-body') + ';',
+        '    proxy_temp_path ' + join(workDir, 'proxy') + ';',
+        '    fastcgi_temp_path ' + join(workDir, 'fastcgi') + ';',
+        '    uwsgi_temp_path ' + join(workDir, 'uwsgi') + ';',
+        '    scgi_temp_path ' + join(workDir, 'scgi') + ';',
+        `    include ${renderedPath};`,
+        '}',
+        '',
+      ].join('\n'),
+    );
+    try {
+      execFileSync('nginx', ['-t', '-c', wrapperPath], {
+        stdio: ['ignore', 'pipe', 'pipe'],
+      });
+      notes.push('渲染后的发行来源配置通过 nginx -t');
+    } catch (error) {
+      const stderr = error.stderr ? String(error.stderr) : '';
+      fail(
+        `渲染后的发行来源配置未通过 nginx -t：${stderr.trim() || error.message}`,
+      );
+    }
+  } finally {
+    rmSync(workDir, { recursive: true, force: true });
+  }
+}
+
+main();

scripts/ci-rust-cache.sh

@@ -1,5 +1,5 @@
 #!/usr/bin/env bash
-# 仅消费镜像内的可信快照；所有写入留在当前容器的可写层。
+# 消费镜像内可信快照；写入留在任务容器，master push 可在任务结束后导出。
 set -euo pipefail
 
 cache_root="${GENARRATIVE_CI_RUST_CACHE_ROOT:-/opt/genarrative-ci/rust-cache}"
@@ -22,7 +22,7 @@ configure_local_cache() {
 case "${1:-}" in
   prepare)
     : "${GITHUB_ENV:?GITHUB_ENV is required}"
-    printf 'RUSTC_WRAPPER=\nCARGO_BUILD_RUSTC_WRAPPER=\nGENARRATIVE_CI_RUST_CACHE_STATE=\n' >> "${GITHUB_ENV}"
+    printf 'RUSTC_WRAPPER=\nCARGO_BUILD_RUSTC_WRAPPER=\nGENARRATIVE_CI_RUST_CACHE_STATE=\nGENARRATIVE_CI_RUST_CACHE_EXPORT_READY=\n' >> "${GITHUB_ENV}"
     fallback() { printf '[rust-cache] mode=direct reason=%s\n' "$1"; exit 0; }
     [[ -x "${cache_binary}" && -d "${cache_root}/objects" && -f "${cache_root}/rustc.txt" && -f "${cache_root}/source-commit.txt" && -f "${cache_root}/workspace.txt" ]] \
       || fallback snapshot-unavailable
@@ -44,6 +44,10 @@ case "${1:-}" in
       fallback wrapper-probe-failed
     fi
     script_path="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd -P)/$(basename "${BASH_SOURCE[0]}")"
+    if [[ "${GITHUB_EVENT_NAME:-}" == push && "${GITHUB_REF:-}" == refs/heads/master ]]; then
+      # 只记 key/大小/时间，不读取对象正文；PR 没有扫描与打包开销。
+      python3 "$(dirname "${script_path}")/export-gitea-rust-cache.py" baseline "${state}/baseline.json"
+    fi
     # wrapper 路径也参与 Rust cache key；固定容器内路径，隔离由 job 容器保证。
     wrapper_path="${cache_root}/rustc-wrapper"
     printf '#!/usr/bin/env bash\nexec bash %q "$@"\n' "${script_path}" > "${wrapper_path}"
@@ -59,7 +63,13 @@ case "${1:-}" in
     if [[ -n "${state}" && -d "${state}" ]]; then
       configure_local_cache
       timeout --kill-after=2 5 "${cache_binary}" --show-stats || true
-      timeout --kill-after=2 5 "${cache_binary}" --stop-server >/dev/null 2>&1 || true
+      # 只有成功停服后才允许读取对象；失败不能把仍在写入的目录发布成完整快照。
+      if timeout --kill-after=2 15 "${cache_binary}" --stop-server >/dev/null 2>&1; then
+        if [[ "${GITHUB_EVENT_NAME:-}" == push && "${GITHUB_REF:-}" == refs/heads/master && ! -f "${state}/disabled" && -f "${state}/baseline.json" ]]; then
+          mv -- "${state}/baseline.json" "${cache_root}/export-baseline.json"
+          printf 'GENARRATIVE_CI_RUST_CACHE_EXPORT_READY=1\n' >> "${GITHUB_ENV}"
+        fi
+      fi
       rm -rf -- "${state}"
     else
       printf '[rust-cache] mode=direct\n'

scripts/ci-rust-cache.test.mjs

@@ -35,7 +35,8 @@ function fixture(t) {
     `#!/bin/bash
 set -eu
 case "$1" in
-  --stop-server|--show-stats) exit 0 ;;
+  --stop-server) exit "\${STOP_FAILURE:-0}" ;;
+  --show-stats) exit 0 ;;
 esac
 if [[ "$*" == *-vV ]]; then
   [[ "\${PROBE_FAILURE:-}" != 1 ]] || exit 1
@@ -215,3 +216,25 @@ linuxTest('lost local cache state still invokes the real compiler', (t) => {
   const f = fixture(t);
   assert.equal(f.run(['/bin/bash', '-c', 'exit 43']).status, 43);
 });
+
+linuxTest('only a cleanly stopped master cache can export objects', (t) => {
+  const master = {
+    GITHUB_EVENT_NAME: 'push',
+    GITHUB_REF: 'refs/heads/master',
+  };
+  for (const stopFailure of ['0', '1']) {
+    const f = fixture(t);
+    const prepared = f.run(['prepare'], master);
+    assert.equal(prepared.status, 0, prepared.stderr);
+    const result = f.run(['report'], {
+      ...f.preparedEnv(),
+      ...master,
+      STOP_FAILURE: stopFailure,
+    });
+    assert.equal(result.status, 0, result.stderr);
+    assert.equal(
+      f.preparedEnv().GENARRATIVE_CI_RUST_CACHE_EXPORT_READY,
+      stopFailure === '0' ? '1' : '',
+    );
+  }
+});

scripts/export-gitea-rust-cache.py

@@ -0,0 +1,274 @@
+#!/usr/bin/env python3
+"""只把 master push 的任务内 sccache 对象导出为 Gitea Actions 产物。"""
+
+import base64
+from datetime import datetime, timedelta, timezone
+import hashlib
+import io
+import json
+import os
+from pathlib import Path
+import re
+import stat
+import subprocess
+import sys
+import tarfile
+import tempfile
+import time
+import urllib.error
+import urllib.parse
+import urllib.request
+import zipfile
+
+
+MAX_OBJECT_BYTES = 4 * 1024**3
+CHUNK_BYTES = 8 * 1024**2
+JOBS = {
+    "ai-game-creator-shell-rust-lane-1",
+    "ai-game-creator-shell-rust-lane-2",
+    "ai-game-creator-shell-rust-smoke",
+    "ai-game-creator-shell-rust-crates",
+    "backend-tests",
+    "native-shell-tests",
+}
+
+
+def object_path(name):
+    parts = name.split("/")
+    return (
+        len(parts) == 3
+        and re.fullmatch(r"[a-f0-9]{64}", parts[2]) is not None
+        and parts[0] == parts[2][0]
+        and parts[1] == parts[2][1]
+    )
+
+
+class HashingReader:
+    def __init__(self, stream):
+        self.stream = stream
+        self.digest = hashlib.sha256()
+
+    def read(self, size=-1):
+        data = self.stream.read(size)
+        self.digest.update(data)
+        return data
+
+
+def scan_objects(root):
+    objects = root / "objects"
+    if objects.is_symlink() or not objects.is_dir():
+        raise ValueError("cache object directory is unavailable")
+    candidates = []
+    for directory, directories, files in os.walk(objects, followlinks=False):
+        directories[:] = [
+            name for name in directories if not (Path(directory) / name).is_symlink()
+        ]
+        for filename in files:
+            path = Path(directory) / filename
+            relative = path.relative_to(objects).as_posix()
+            info = path.lstat()
+            if object_path(relative) and stat.S_ISREG(info.st_mode):
+                candidates.append((path, relative, info))
+    return candidates
+
+
+def save_baseline(root, destination):
+    # sccache 命中会更新 mtime，不能把时间变化当成内容变化，否则又变成全量上传。
+    baseline = {
+        relative: {"size": info.st_size, "mtime_ns": info.st_mtime_ns}
+        for _, relative, info in scan_objects(root)
+    }
+    destination.write_text(json.dumps(baseline), encoding="utf-8")
+
+
+def pack_snapshot(root, destination, metadata, baseline, limit=MAX_OBJECT_BYTES):
+    """仅归档新 key；命中的已有对象只传递新近使用时间，不传输对象内容。"""
+    candidates = scan_objects(root)
+    candidates.sort(key=lambda item: (-item[2].st_mtime_ns, item[1]))
+    entries = []
+    touched = []
+    total = 0
+    with zipfile.ZipFile(destination, "w", compression=zipfile.ZIP_STORED) as bundle, \
+            bundle.open("snapshot.tar", "w", force_zip64=True) as tar_stream, \
+            tarfile.open(fileobj=tar_stream, mode="w|", format=tarfile.USTAR_FORMAT) as archive:
+        for path, relative, info in candidates:
+            previous = baseline.get(relative)
+            if previous is not None and previous["size"] == info.st_size:
+                if previous["mtime_ns"] != info.st_mtime_ns:
+                    touched.append({"path": "objects/" + relative, "mtime_ns": info.st_mtime_ns})
+                continue
+            if info.st_size <= 0 or total + info.st_size > limit:
+                continue
+            # report 已成功停止 daemon；打开后再核实对象，避免导出变化中的文件。
+            descriptor = os.open(path, os.O_RDONLY | getattr(os, "O_NOFOLLOW", 0))
+            with os.fdopen(descriptor, "rb") as stream:
+                actual = os.fstat(stream.fileno())
+                if not stat.S_ISREG(actual.st_mode) or (
+                    actual.st_size, actual.st_mtime_ns, actual.st_ino
+                ) != (info.st_size, info.st_mtime_ns, info.st_ino):
+                    raise ValueError("cache object changed during export")
+                member = tarfile.TarInfo("objects/" + relative)
+                member.size = info.st_size
+                member.mode = 0o644
+                member.mtime = int(info.st_mtime)
+                reader = HashingReader(stream)
+                archive.addfile(member, reader)
+                entries.append({
+                    "path": member.name,
+                    "size": info.st_size,
+                    "sha256": reader.digest.hexdigest(),
+                    "mtime_ns": info.st_mtime_ns,
+                })
+                total += info.st_size
+        manifest = dict(metadata, schema=1, mode="delta", objects=entries, touched=touched)
+        data = json.dumps(manifest, ensure_ascii=False, sort_keys=True).encode("utf-8")
+        member = tarfile.TarInfo("manifest.json")
+        member.size = len(data)
+        member.mode = 0o644
+        archive.addfile(member, io.BytesIO(data))
+    return len(entries), total
+
+
+class NoRedirect(urllib.request.HTTPRedirectHandler):
+    def redirect_request(self, req, fp, code, msg, headers, newurl):
+        # runtime token 只允许发往明确配置的 Gitea 地址。
+        return None
+
+
+def request(method, url, token, data=None, headers=None, attempts=3):
+    opener = urllib.request.build_opener(NoRedirect())
+    for attempt in range(attempts):
+        req = urllib.request.Request(url, data=data, method=method, headers={
+            **({"Authorization": "Bearer " + token} if token else {}),
+            "Content-Type": "application/json",
+            **(headers or {}),
+        })
+        try:
+            with opener.open(req, timeout=120) as response:
+                body = response.read(1024 * 1024)
+                return json.loads(body) if body else {}
+        except urllib.error.HTTPError as error:
+            if error.code not in (408, 429, 500, 502, 503, 504) or attempt == attempts - 1:
+                raise RuntimeError(f"artifact {method} failed: HTTP {error.code}") from None
+        except (urllib.error.URLError, TimeoutError, ConnectionError):
+            if attempt == attempts - 1:
+                raise RuntimeError(f"artifact {method} connection failed") from None
+        time.sleep(2 ** attempt)
+
+
+def artifact_base_url(env):
+    # .runner.address 可指向仅支持 RPC 的领取网关，不能用 GITHUB_SERVER_URL。
+    repository = env["GITHUB_REPOSITORY"]
+    clone_url = env["GENARRATIVE_GITEA_REPOSITORY_URL"]
+    suffix = "/" + repository + ".git"
+    parsed = urllib.parse.urlsplit(clone_url)
+    if (
+        parsed.scheme not in ("http", "https")
+        or not parsed.netloc
+        or parsed.username or parsed.password or parsed.query or parsed.fragment
+        or not parsed.path.endswith(suffix)
+    ):
+        raise ValueError("a credential-free HTTP Gitea repository URL is required")
+    return urllib.parse.urlunsplit((
+        parsed.scheme, parsed.netloc, parsed.path[:-len(suffix)], "", ""
+    ))
+
+
+def upload_snapshot(path, name, run_id, base_url, token):
+    """Gitea 1.26.4 原生 v4：只有完成全部块并校验 SHA256 后才发布。"""
+    producer_match = re.fullmatch(r"rust-cache-v1-([a-z0-9-]+)-attempt-(0|[1-9][0-9]*)", name)
+    if not producer_match or producer_match[1] not in JOBS:
+        raise ValueError("unexpected cache artifact name")
+    producer = f"{producer_match[1]}:{producer_match[2]}"
+    endpoint = f"{base_url}/twirp/github.actions.results.api.v1.ArtifactService"
+    # Gitea 从任务凭据确定 job，只要求请求中的 run ID 与任务所属 run 一致。
+    identity = {"workflowRunBackendId": str(run_id), "name": name}
+    created = request("POST", endpoint + "/CreateArtifact", token, json.dumps({
+        **identity, "version": 4,
+        # Gitea 将剩余小时向下取整成天；多给一天，服务端才实际保留至少七天。
+        "expiresAt": (datetime.now(timezone.utc) + timedelta(days=8)).isoformat(),
+    }).encode())
+    received = urllib.parse.urlsplit(created.get("signedUploadUrl", ""))
+    expected_path = urllib.parse.urlsplit(endpoint).path + "/UploadArtifact"
+    if not created.get("ok") or received.path != expected_path or not received.query:
+        raise ValueError("unexpected artifact upload path")
+    # 服务可能返回外部 AppURL；保留签名，但只连接配置的内部 Gitea 地址。
+    upload_url = endpoint + "/UploadArtifact?" + received.query
+    size = path.stat().st_size
+    digest = hashlib.sha256()
+    blocks = []
+    with path.open("rb") as source:
+        while chunk := source.read(CHUNK_BYTES):
+            # 双层编码中的内层保留所属任务；宿主只回收带此前缀的过期未完成块。
+            block = base64.b64encode(
+                f"genarrative-rust-cache-v1:{producer}:{len(blocks):08d}".encode()
+            ).decode()
+            blocks.append(block)
+            digest.update(chunk)
+            request("PUT", upload_url + "&" + urllib.parse.urlencode({
+                "comp": "block", "blockid": block,
+            }), None, chunk, {
+                "Content-Type": "application/octet-stream",
+            })
+    blocklist = "<BlockList>" + "".join(f"<Latest>{block}</Latest>" for block in blocks) + "</BlockList>"
+    request("PUT", upload_url + "&comp=blocklist", None, blocklist.encode(), {
+        "Content-Type": "application/xml",
+    })
+    # Finalize 会消耗服务端块列表；响应不确定时不盲目重试、也不宣告成功。
+    finalized = request("POST", endpoint + "/FinalizeArtifact", token, json.dumps({
+        **identity, "size": str(size), "hash": "sha256:" + digest.hexdigest(),
+    }).encode(), attempts=1)
+    if not finalized.get("ok"):
+        raise ValueError("artifact was not finalized")
+
+
+def export(env):
+    # 双重限定：手工调用、PR 和其它分支不会扫描、打包或上传对象。
+    if env.get("GITHUB_EVENT_NAME") != "push" or env.get("GITHUB_REF") != "refs/heads/master":
+        return
+    if env.get("GENARRATIVE_CI_RUST_CACHE_EXPORT_READY") != "1":
+        print("[rust-cache] export skipped: cache daemon did not stop cleanly")
+        return
+    job = env.get("GITHUB_JOB")
+    if job not in JOBS:
+        raise ValueError("unexpected Rust cache job")
+    sha = env["GITHUB_SHA"]
+    if not re.fullmatch(r"[a-f0-9]{40}", sha):
+        raise ValueError("a complete source SHA is required")
+    run_id, attempt = int(env["GITHUB_RUN_ID"]), int(env["GITHUB_RUN_ATTEMPT"])
+    if run_id <= 0 or attempt < 0:
+        raise ValueError("invalid run identity")
+    token = env.get("ACTIONS_RUNTIME_TOKEN") or env["GENARRATIVE_GITEA_TOKEN"]
+    base_url = artifact_base_url(env)
+    root = Path(env.get("GENARRATIVE_CI_RUST_CACHE_ROOT", "/opt/genarrative-ci/rust-cache"))
+    baseline_path = root / "export-baseline.json"
+    baseline = json.loads(baseline_path.read_text(encoding="utf-8"))
+    rustc = subprocess.check_output(["rustc", "-vV"], text=True)
+    workspace = str(Path.cwd().resolve())
+    if rustc != (root / "rustc.txt").read_text() or workspace != (root / "workspace.txt").read_text().strip():
+        raise ValueError("cache provenance changed after prepare")
+    metadata = {
+        "repository": env["GITHUB_REPOSITORY"],
+        "run_id": run_id, "run_attempt": attempt, "job": job, "source_sha": sha,
+        "rustc": rustc, "workspace": workspace,
+        "inherited_source_sha": (root / "source-commit.txt").read_text().strip(),
+        "sccache_version": subprocess.check_output([str(root / "sccache"), "--version"], text=True).strip(),
+    }
+    if (root / "base-image.txt").is_file():
+        metadata["base_image"] = (root / "base-image.txt").read_text().strip()
+    name = f"rust-cache-v1-{job}-attempt-{attempt}"
+    try:
+        with tempfile.TemporaryDirectory(prefix="ci-rust-cache-export-") as directory:
+            path = Path(directory) / "snapshot.zip"
+            count, size = pack_snapshot(root, path, metadata, baseline)
+            upload_snapshot(path, name, run_id, base_url, token)
+    finally:
+        baseline_path.unlink(missing_ok=True)
+    print(f"[rust-cache] artifact={name} objects={count} bytes={size} complete=true")
+
+
+if __name__ == "__main__":
+    if len(sys.argv) == 3 and sys.argv[1] == "baseline":
+        save_baseline(Path(os.environ.get("GENARRATIVE_CI_RUST_CACHE_ROOT", "/opt/genarrative-ci/rust-cache")), Path(sys.argv[2]))
+    else:
+        export(os.environ)

scripts/gitea-ci-job-image.sh

@@ -39,6 +39,7 @@ usage() {
   cat <<'EOF'
 用法：
   bash scripts/gitea-ci-job-image.sh build
+  bash scripts/gitea-ci-job-image.sh revision
   bash scripts/gitea-ci-job-image.sh verify [镜像引用]
   bash scripts/gitea-ci-job-image.sh load-runner [镜像引用]
   bash scripts/gitea-ci-job-image.sh export <归档路径> [镜像引用]
@@ -65,40 +66,15 @@ verify_image() {
 
 command_name="${1:-}"
 case "${command_name}" in
-  build)
-    image_revision="$(
+  revision)
+    # 与 build 的 IMAGE_REVISION 使用同一份输入顺序，用于维护器判断基础镜像是否过期。
+    (
       cd "${repo_root}"
-      {
-        sha256sum \
-          deploy/container/gitea-ci-job.Dockerfile \
-          deploy/container/gitea-ci-job.Dockerfile.dockerignore \
-          deploy/container/gitea-ci-checkout.sh \
-          package.json \
-          package-lock.json \
-          apps/admin-web/package.json \
-          apps/ai-game-creator-shell/package.json \
-          apps/desktop-shell/package.json \
-          apps/mobile-shell/package.json \
-          apps/preview-deployer-web/package.json \
-          packages/image-canvas-core/package.json \
-          packages/image-canvas-react/package.json \
-          packages/shared/package.json \
-          tools/spine-json-export-validator/package.json \
-          apps/ai-game-creator-shell/src-tauri/Cargo.toml \
-          apps/ai-game-creator-shell/src-tauri/Cargo.lock \
-          server-rs/Cargo.toml \
-          server-rs/Cargo.lock \
-          apps/desktop-shell/src-tauri/Cargo.toml \
-          apps/desktop-shell/src-tauri/Cargo.lock
-        find server-rs/crates plugins/agc-*-editor/native/*-editor-bridge \
-          \( -name Cargo.toml -o -path 'plugins/agc-*-editor/native/*-editor-bridge/*' \) \
-          -type f -print0 \
-          | sort -z \
-          | xargs -0 -r sha256sum
-      } \
-        | sha256sum \
-        | awk '{ print $1 }'
-    )"
+      write_build_context_file_list | xargs -0 -r sha256sum | sha256sum | awk '{ print $1 }'
+    )
+    ;;
+  build)
+    image_revision="$(bash "${BASH_SOURCE[0]}" revision)"
     npm_lock_sha256="$(sha256sum "${repo_root}/package-lock.json")"
     npm_lock_sha256="${npm_lock_sha256%% *}"
     server_rust_lock_sha256="$(sha256sum "${repo_root}/server-rs/Cargo.lock")"

scripts/gitea-runner-fetch-gate.py

@@ -0,0 +1,447 @@
+#!/usr/bin/env python3
+"""Gitea Runner 领取屏障；控制 socket 仅供宿主缓存维护任务使用。"""
+
+import http.client
+import http.server
+import gzip
+import io
+import json
+import os
+from pathlib import Path
+import socketserver
+import threading
+import time
+import urllib.parse
+import zlib
+
+MAX_BODY = 32 * 1024 * 1024
+HOP_HEADERS = {
+    "connection", "keep-alive", "proxy-authenticate", "proxy-authorization",
+    "te", "trailer", "transfer-encoding", "upgrade", "host", "content-length",
+}
+RPC_PREFIX = "/api/actions/runner.v1.RunnerService/"
+
+
+def protobuf_fields(data):
+    """只解码已核对的 actions-proto-go v0.4.1 字段，不引入 protobuf 运行时。"""
+    fields = {}
+    offset = 0
+
+    def varint():
+        nonlocal offset
+        value = 0
+        for shift in range(0, 70, 7):
+            if offset >= len(data):
+                raise ValueError("truncated protobuf")
+            byte = data[offset]
+            offset += 1
+            value |= (byte & 127) << shift
+            if byte < 128:
+                return value
+        raise ValueError("invalid protobuf varint")
+
+    while offset < len(data):
+        tag = varint()
+        number, wire = tag >> 3, tag & 7
+        if not number:
+            raise ValueError("invalid protobuf tag")
+        if wire == 0:
+            value = varint()
+        elif wire in (1, 2, 5):
+            length = varint() if wire == 2 else (8 if wire == 1 else 4)
+            if offset + length > len(data):
+                raise ValueError("truncated protobuf field")
+            value = data[offset:offset + length]
+            offset += length
+        else:
+            raise ValueError("unsupported protobuf wire type")
+        fields.setdefault(number, []).append(value)
+    return fields
+
+
+def single(fields, number, default=None):
+    values = fields.get(number, [])
+    if len(values) > 1:
+        raise ValueError("ambiguous tracking field")
+    return values[0] if values else default
+
+
+def rpc_fields(body, headers):
+    encoding = headers.get("Content-Encoding", "identity").lower()
+    if encoding == "gzip":
+        with gzip.GzipFile(fileobj=io.BytesIO(body)) as stream:
+            body = stream.read(MAX_BODY + 1)
+    elif encoding != "identity":
+        raise ValueError("unsupported RPC encoding")
+    if len(body) > MAX_BODY:
+        raise ValueError("decoded RPC too large")
+    if headers.get("Content-Type", "").split(";", 1)[0] != "application/proto":
+        raise ValueError("task tracking requires Connect protobuf")
+    return protobuf_fields(body)
+
+
+def task_state(fields):
+    nested = single(fields, 1)
+    if not isinstance(nested, bytes):
+        raise ValueError("missing task state")
+    state = protobuf_fields(nested)
+    task_id = positive_id(single(state, 1))
+    result = single(state, 2, 0)
+    if type(result) is not int or result not in range(5):
+        raise ValueError("unknown task result")
+    return task_id, result
+
+
+def positive_id(value):
+    if type(value) is not int or not 0 < value < 2 ** 63:
+        raise ValueError("invalid task ID")
+    return str(value)
+
+
+class Gate:
+    def __init__(self, directory):
+        self.directory = Path(directory)
+        self.directory.mkdir(parents=True, exist_ok=True)
+        self.lock = threading.Lock()
+        self.inflight = 0
+        self.last_fetch_peer = None
+        self.last_fetch_at = None
+        self.tasks = {}
+        self.uncertain = (self.directory / "uncertain").exists()
+        try:
+            if (self.directory / "tasks.json").exists():
+                tasks = json.loads((self.directory / "tasks.json").read_text())
+                if (not isinstance(tasks, dict) or any(
+                        positive_id(int(key)) != key or type(value) is not bool
+                        for key, value in tasks.items())):
+                    raise ValueError("invalid task ledger")
+                self.tasks = tasks
+        except (ValueError, TypeError, OSError):
+            self.uncertain = True
+            self.mark("uncertain")
+        if (self.directory / "inflight").exists():
+            self.uncertain = True
+            self.mark("uncertain")
+        self.paused = (self.directory / "paused").exists() or self.uncertain
+
+    def mark(self, name):
+        with (self.directory / name).open("w", encoding="ascii") as stream:
+            stream.write("1\n")
+            stream.flush()
+            os.fsync(stream.fileno())
+        self.sync_directory()
+
+    def sync_directory(self):
+        descriptor = os.open(self.directory, os.O_RDONLY | os.O_DIRECTORY)
+        try:
+            os.fsync(descriptor)
+        finally:
+            os.close(descriptor)
+
+    def snapshot(self):
+        return {"paused": self.paused, "inflight": self.inflight,
+                "active_tasks": len(self.tasks), "task_ids": sorted(self.tasks),
+                "uncertain": self.uncertain, "last_fetch_peer": self.last_fetch_peer,
+                "last_fetch_at": self.last_fetch_at}
+
+    def save_tasks(self):
+        temporary = self.directory / "tasks.json.tmp"
+        with temporary.open("w", encoding="ascii") as stream:
+            json.dump(self.tasks, stream, sort_keys=True)
+            stream.flush()
+            os.fsync(stream.fileno())
+        os.replace(temporary, self.directory / "tasks.json")
+        self.sync_directory()
+
+    def fail_closed(self):
+        with self.lock:
+            self.uncertain = self.paused = True
+            self.mark("uncertain")
+
+    def assigned(self, fields):
+        task = single(fields, 1)
+        if task is None:
+            return
+        if not isinstance(task, bytes):
+            raise ValueError("invalid fetched task")
+        task_id = positive_id(single(protobuf_fields(task), 1))
+        with self.lock:
+            self.tasks[task_id] = False
+            # 必须先持久化，再把领取结果交给 runner；仅保存 ID，不保存 secrets。
+            self.save_tasks()
+
+    def reported(self, method, request, response):
+        if method == "UpdateLog":
+            task_id = positive_id(single(request, 1))
+            index = single(request, 2, 0)
+            ack = single(response, 1, 0)
+            no_more = single(request, 4, 0)
+            if (type(index) is not int or type(ack) is not int
+                    or index < 0 or ack < 0 or no_more not in (0, 1)):
+                raise ValueError("invalid log acknowledgement")
+            finalized = no_more == 1 and ack == index + len(request.get(3, []))
+        else:
+            task_id, result = task_state(request)
+            response_id, response_result = task_state(response)
+            if response_id != task_id:
+                raise ValueError("mismatched task acknowledgement")
+            # 取消响应可能出现在任务执行途中，必须等 runner 自己报告终态。
+            finalized = result != 0 and response_result != 0
+            output_keys = {single(protobuf_fields(entry), 1, b"")
+                           for entry in request.get(2, [])}
+            finalized = finalized and output_keys.issubset(set(response.get(2, [])))
+        with self.lock:
+            if task_id not in self.tasks:
+                # 客户端可能未读到已成功发出的终态响应而重试；v2.0.0 仅在
+                # executor 清理后的 Close 中发送终态，不为幂等重报增加墓碑账本。
+                if method == "UpdateTask" and finalized:
+                    return
+                raise ValueError("report for untracked task; idle bootstrap required")
+            if method == "UpdateLog" and finalized:
+                self.tasks[task_id] = True
+                self.save_tasks()
+            elif method == "UpdateTask" and finalized and self.tasks[task_id]:
+                # act_runner Reporter.Close 在 executor 清理之后先封存日志再报终态。
+                del self.tasks[task_id]
+                self.save_tasks()
+
+    def record_fetch(self, peer):
+        with self.lock:
+            self.last_fetch_peer = peer
+            self.last_fetch_at = time.time()
+
+    def control(self, action):
+        with self.lock:
+            if action == "pause":
+                self.mark("paused")
+                self.paused = True
+            elif action == "resume":
+                if self.uncertain:
+                    return {**self.snapshot(), "error": "upstream completion uncertain; operator recovery required"}
+                (self.directory / "paused").unlink(missing_ok=True)
+                self.sync_directory()
+                self.paused = False
+            elif action != "status":
+                return {**self.snapshot(), "error": "unknown action"}
+            return self.snapshot()
+
+    def enter(self):
+        with self.lock:
+            if self.paused or self.uncertain:
+                return False
+            # 必须先落盘再转发；崩溃后不能把遗留的领取请求误认为已完成。
+            self.mark("inflight")
+            self.inflight += 1
+            return True
+
+    def leave(self, completed):
+        with self.lock:
+            self.inflight -= 1
+            if not completed:
+                self.uncertain = self.paused = True
+                self.mark("uncertain")
+            if self.inflight == 0 and not self.uncertain:
+                (self.directory / "inflight").unlink(missing_ok=True)
+                self.sync_directory()
+
+
+def read_body(stream, headers):
+    """解码 HTTP 请求；拒绝含糊 framing，不依赖下游连接关闭。"""
+    encodings = headers.get_all("Transfer-Encoding", [])
+    lengths = headers.get_all("Content-Length", [])
+    if encodings and lengths:
+        raise ValueError("ambiguous request framing")
+    if len(lengths) > 1 or len(encodings) > 1:
+        raise ValueError("duplicate request framing")
+
+    def exact(length):
+        data = stream.read(length)
+        if len(data) != length:
+            raise ValueError("incomplete request body")
+        return data
+
+    if not encodings:
+        length = int(lengths[0]) if lengths else 0
+        if not 0 <= length <= MAX_BODY:
+            raise ValueError("request too large")
+        return exact(length)
+    if encodings[0].strip().lower() != "chunked":
+        raise ValueError("unsupported transfer encoding")
+    body = bytearray()
+    while True:
+        line = stream.readline(8193)
+        if len(line) > 8192 or not line.endswith(b"\r\n"):
+            raise ValueError("invalid chunk header")
+        length = int(line.split(b";", 1)[0].strip(), 16)
+        if length < 0 or len(body) + length > MAX_BODY:
+            raise ValueError("request too large")
+        if length == 0:
+            trailer_size = 0
+            while True:
+                line = stream.readline(8193)
+                trailer_size += len(line)
+                if trailer_size > 8192 or not line.endswith(b"\r\n"):
+                    raise ValueError("invalid request trailers")
+                if line == b"\r\n":
+                    return bytes(body)
+        body.extend(exact(length))
+        if exact(2) != b"\r\n":
+            raise ValueError("invalid chunk terminator")
+
+
+class Proxy(http.server.BaseHTTPRequestHandler):
+    protocol_version = "HTTP/1.1"
+
+    def log_message(self, *_args):
+        pass  # 不输出 RPC 认证头、请求内容或带认证信息的 URL。
+
+    def reply(self, status, body, headers=()):
+        delivered = False
+        try:
+            self.send_response(status)
+            excluded = HOP_HEADERS | {
+                item.strip().lower() for key, value in headers if key.lower() == "connection"
+                for item in value.split(",")
+            }
+            for key, value in headers:
+                if key.lower() not in excluded:
+                    self.send_header(key, value)
+            self.send_header("Content-Length", str(len(body)))
+            self.send_header("Connection", "close")
+            self.end_headers()
+            self.wfile.write(body)
+            self.wfile.flush()
+            delivered = True
+        except (OSError, ValueError):
+            pass
+        self.close_connection = True
+        return delivered
+
+    def do_POST(self):
+        path = urllib.parse.urlsplit(self.path)
+        if (path.scheme or path.netloc or not path.path.startswith("/api/actions/")
+                or "%" in path.path or any(p in (".", "..") for p in path.path.split("/"))):
+            self.reply(404, b"runner RPC only\n")
+            return
+        try:
+            body = read_body(self.rfile, self.headers)
+        except (ValueError, OSError):
+            self.reply(400, b"invalid request body\n")
+            return
+        method = path.path.removeprefix(RPC_PREFIX) if path.path.startswith(RPC_PREFIX) else ""
+        is_fetch = method == "FetchTask"
+        if is_fetch:
+            # 包括暂停时被拒绝的请求；只记录网络来源与时间以证明 daemon 路由。
+            self.server.gate.record_fetch(self.client_address[0])
+            if not self.server.gate.enter():
+                self.reply(503, b"runner maintenance\n")
+                return
+        completed = False
+        connection = None
+        try:
+            upstream = self.server.upstream
+            cls = http.client.HTTPSConnection if upstream.scheme == "https" else http.client.HTTPConnection
+            connection = cls(upstream.hostname, upstream.port, timeout=None)
+            try:
+                connection.connect()
+            except OSError:
+                # TCP/TLS 连接阶段尚未发送 RPC，不存在服务端分配事务。
+                completed = True
+                raise
+            excluded = HOP_HEADERS | {
+                name.strip().lower() for name in self.headers.get("Connection", "").split(",")
+            }
+            headers = {key: value for key, value in self.headers.items() if key.lower() not in excluded}
+            headers["Content-Length"] = str(len(body))
+            connection.request("POST", self.path, body=body, headers=headers)
+            response = connection.getresponse()
+            result = bytearray()
+            oversized = False
+            # 客户端即使断开，也继续读取上游完整响应，再释放领取屏障。
+            while block := response.read(65536):
+                if len(result) + len(block) <= MAX_BODY and not oversized:
+                    result.extend(block)
+                else:
+                    oversized = True
+                    result.clear()
+            if response.length not in (None, 0):
+                raise http.client.IncompleteRead(bytes(result), response.length)
+            completed = True
+            if is_fetch:
+                try:
+                    if oversized or response.status != 200:
+                        raise ValueError("unknown FetchTask result")
+                    self.server.gate.assigned(rpc_fields(bytes(result), response.headers))
+                except (ValueError, TypeError, OSError, EOFError, zlib.error):
+                    self.server.gate.fail_closed()
+                self.server.gate.leave(True)
+                is_fetch = False
+            if oversized:
+                self.reply(502, b"upstream response too large\n")
+            else:
+                # 日志封存先记账再返回，避免 runner 立即发终态时抢先读到旧账本。
+                if method == "UpdateLog" and response.status == 200:
+                    self.observe_report(method, body, bytes(result), response.headers)
+                delivered = self.reply(response.status, bytes(result), response.getheaders())
+                if method == "UpdateTask" and response.status == 200 and delivered:
+                    self.observe_report(method, body, bytes(result), response.headers)
+        except (OSError, http.client.HTTPException, ValueError):
+            self.reply(502, b"runner upstream unavailable\n")
+        finally:
+            if connection is not None:
+                connection.close()
+            if is_fetch:
+                self.server.gate.leave(completed)
+
+    def observe_report(self, method, request, response, headers):
+        try:
+            self.server.gate.reported(method, rpc_fields(request, self.headers),
+                                      rpc_fields(response, headers))
+        except (ValueError, TypeError, OSError, EOFError, zlib.error):
+            self.server.gate.fail_closed()
+
+
+class Control(socketserver.StreamRequestHandler):
+    def handle(self):
+        try:
+            line = self.rfile.readline(4097)
+            if len(line) > 4096 or not line.endswith(b"\n"):
+                raise ValueError("invalid control request")
+            request = json.loads(line)
+            result = self.server.gate.control(request["action"])
+        except (ValueError, KeyError, TypeError, OSError):
+            result = {"error": "invalid control request"}
+        self.wfile.write(json.dumps(result).encode("utf-8") + b"\n")
+
+
+class ControlServer(socketserver.ThreadingUnixStreamServer):
+    daemon_threads = True
+
+
+def create_proxy(address, upstream, gate):
+    parsed = urllib.parse.urlsplit(upstream)
+    if (parsed.scheme not in ("http", "https") or not parsed.hostname
+            or parsed.username or parsed.password or parsed.path not in ("", "/")
+            or parsed.query or parsed.fragment):
+        raise ValueError("upstream must be an HTTP(S) origin")
+    server = http.server.ThreadingHTTPServer(address, Proxy)
+    server.upstream = parsed
+    server.gate = gate
+    return server
+
+
+def main():
+    gate = Gate(os.environ.get("GITEA_GATE_CONTROL_DIR", "/control"))
+    socket_path = gate.directory / "gate.sock"
+    socket_path.unlink(missing_ok=True)
+    control = ControlServer(str(socket_path), Control)
+    control.gate = gate
+    os.chmod(socket_path, 0o600)
+    proxy = create_proxy(("0.0.0.0", 8080), os.environ.get(
+        "GITEA_RUNNER_UPSTREAM", "http://gitea:3000"), gate)
+    threading.Thread(target=control.serve_forever, daemon=True).start()
+    proxy.serve_forever()
+
+
+if __name__ == "__main__":
+    main()

scripts/gitea_cache_upload_cleanup.py

@@ -0,0 +1,115 @@
+"""定向回收 Gitea 1.26.4 不会自动过期的本仓库缓存上传块。"""
+
+import base64
+import binascii
+import math
+from pathlib import Path
+import re
+import stat
+
+
+JOBS = {
+    "ai-game-creator-shell-rust-lane-1",
+    "ai-game-creator-shell-rust-lane-2",
+    "ai-game-creator-shell-rust-smoke",
+    "ai-game-creator-shell-rust-crates",
+    "backend-tests",
+    "native-shell-tests",
+}
+CHUNK = re.compile(r"block-([1-9][0-9]*)-([1-9][0-9]*)-(0|[1-9][0-9]*)-([A-Za-z0-9_-]+={0,2})")
+BLOCKLIST = re.compile(r"([1-9][0-9]*)-([1-9][0-9]*)-blocklist")
+MARKER = re.compile(r"genarrative-rust-cache-v1:([a-z0-9-]+):(0|[1-9][0-9]*):([0-9]{8})")
+
+
+def decode_owner(encoded):
+    """Gitea 文件名编码为 URL-base64(生产者上传的标准 base64 blockid)。"""
+    try:
+        block_id = base64.b64decode(encoded, altchars=b"-_", validate=True)
+        if base64.urlsafe_b64encode(block_id).decode() != encoded:
+            return None
+        marker = base64.b64decode(block_id, validate=True)
+        if base64.b64encode(marker) != block_id:
+            return None
+        match = MARKER.fullmatch(marker.decode("ascii"))
+        if match and match[1] in JOBS:
+            return match[1], int(match[2])
+    except (binascii.Error, UnicodeError, ValueError):
+        pass
+    return None
+
+
+def _unchanged_old_regular(path, previous, cutoff):
+    try:
+        current = path.lstat()
+    except FileNotFoundError:
+        return False
+    return (
+        stat.S_ISREG(current.st_mode)
+        and current.st_mtime < cutoff
+        and (current.st_ino, current.st_size, current.st_mtime_ns)
+        == (previous.st_ino, previous.st_size, previous.st_mtime_ns)
+    )
+
+
+def cleanup_upload_chunks(storage_root: Path, eligible_runs: set[int], cutoff_timestamp: float) -> int:
+    """调用方先用仓库 API 确认这些 master run 已结束超过保留期限。"""
+    storage_root = Path(storage_root)
+    if not storage_root.is_absolute() or storage_root.resolve(strict=True) != storage_root:
+        raise ValueError("artifact storage root must be an existing absolute real directory")
+    if not stat.S_ISDIR(storage_root.lstat().st_mode):
+        raise ValueError("artifact storage root must be a directory")
+    if not math.isfinite(cutoff_timestamp) or cutoff_timestamp <= 0:
+        raise ValueError("invalid artifact cleanup cutoff")
+    if any(type(run_id) is not int or run_id <= 0 for run_id in eligible_runs):
+        raise ValueError("invalid eligible run ID")
+    temporary = storage_root / "tmp-upload"
+    if not temporary.exists() and not temporary.is_symlink():
+        return 0
+    if temporary.is_symlink() or not temporary.is_dir():
+        raise ValueError("artifact temporary path must be a real directory")
+
+    deleted = 0
+    for run_id in sorted(eligible_runs):
+        directory = temporary / f"run-{run_id}-v4"
+        if directory.is_symlink() or not directory.is_dir():
+            continue
+        groups = {}
+        unknown = False
+        for path in directory.iterdir():
+            chunk = CHUNK.fullmatch(path.name)
+            blocklist = BLOCKLIST.fullmatch(path.name)
+            match = chunk or blocklist
+            if match and int(match[1]) == run_id:
+                artifact_id = int(match[2])
+                owner = decode_owner(chunk[4]) if chunk else None
+                owned = owner is not None if chunk else True
+            else:
+                # 若仍能识别 artifact ID，仅保护该组；无法识别时保护整个 run。
+                prefix = re.match(rf"(?:block-)?{run_id}-([1-9][0-9]*)-", path.name)
+                if not prefix:
+                    unknown = True
+                    break
+                artifact_id, owner, owned = int(prefix[1]), None, False
+            group = groups.setdefault(artifact_id, {"files": [], "owners": set(), "safe": True})
+            try:
+                info = path.lstat()
+            except FileNotFoundError:
+                group["safe"] = False
+                continue
+            group["safe"] &= owned and stat.S_ISREG(info.st_mode) and info.st_mtime < cutoff_timestamp
+            if owner:
+                group["owners"].add(owner)
+            group["files"].append((path, info))
+        if unknown:
+            continue
+        for group in groups.values():
+            if not group["safe"] or len(group["owners"]) != 1:
+                continue
+            files = group["files"]
+            if not all(_unchanged_old_regular(path, info, cutoff_timestamp) for path, info in files):
+                continue
+            # 保留目录，不使用递归删除；没有所属块证明的孤立 blocklist 也不会删除。
+            for path, _ in files:
+                path.unlink()
+                deleted += 1
+    return deleted

scripts/project-ci-workflow.test.ts

@@ -142,6 +142,38 @@ function backendStepIndex(stepName: string) {
 }
 
 describe('project CI workflow', () => {
+  it('publishes cache deltas only after Rust reporting on non-cancelled master pushes', () => {
+    const producers = [
+      'ai-game-creator-shell-rust-lane-1',
+      'ai-game-creator-shell-rust-lane-2',
+      'ai-game-creator-shell-rust-smoke',
+      'ai-game-creator-shell-rust-crates',
+      'backend-tests',
+      'native-shell-tests',
+    ];
+    for (const job of jobNames) {
+      if (!producers.includes(job)) {
+        expect(jobSection(job)).not.toContain('export-gitea-rust-cache.py');
+        continue;
+      }
+      const publish = stepSection(job, 'Publish master Rust cache artifact');
+      expect(publish).toContain(
+        "if: ${{ !cancelled() && github.event_name == 'push' && github.ref == 'refs/heads/master' }}",
+      );
+      expect(publish).toContain('GENARRATIVE_GITEA_TOKEN: ${{ github.token }}');
+      expect(publish).toContain('continue-on-error: true');
+      expect(publish).toContain(
+        'run: python3 scripts/export-gitea-rust-cache.py',
+      );
+      const section = jobSection(job);
+      expect(
+        section.indexOf('Publish master Rust cache artifact'),
+      ).toBeGreaterThan(
+        section.indexOf('run: bash scripts/ci-rust-cache.sh report'),
+      );
+    }
+  });
+
   it('uses isolated compilation caching for every Rust test job', () => {
     const firstRustSteps = {
       'ai-game-creator-shell-rust-lane-1':
@@ -331,7 +363,8 @@ describe('project CI workflow', () => {
     const rustLock = 'apps/ai-game-creator-shell/src-tauri/Cargo.lock';
 
     for (const workspaceManifest of workspaceManifests) {
-      expect(imageBuildScript.split(workspaceManifest)).toHaveLength(3);
+      // 构建上下文与 revision 共用一份清单，不重复枚举 manifest。
+      expect(imageBuildScript.split(workspaceManifest)).toHaveLength(2);
       expect(imageDockerignore).toContain(`!${workspaceManifest}`);
       expect(imageDockerfile).toContain(
         `COPY ${workspaceManifest} /usr/local/share/genarrative-ci/npm/${workspaceManifest}`,
@@ -339,8 +372,8 @@ describe('project CI workflow', () => {
     }
 
     for (const [path, expectedCount] of [
-      [rustManifest, 2],
-      [rustLock, 3],
+      [rustManifest, 1],
+      [rustLock, 2],
     ] as const) {
       expect(imageBuildScript.split(path)).toHaveLength(expectedCount + 1);
       expect(imageDockerignore).toContain(`!${path}`);

scripts/test_gitea_cache_builder.py

@@ -0,0 +1,201 @@
+#!/usr/bin/env python3
+"""Targeted regression tests for the trusted Gitea Rust-cache image builder."""
+
+from __future__ import annotations
+
+import os
+from pathlib import Path
+import shutil
+import shlex
+import stat
+import subprocess
+import tempfile
+import textwrap
+import unittest
+
+
+REPOSITORY_ROOT = Path(__file__).resolve().parent.parent
+BUILDER_NAME = "build-gitea-rust-cache.sh"
+FIXED_SHA = "a" * 40
+MASTER_SHA = "b" * 40
+
+
+class GiteaRustCacheBuilderTest(unittest.TestCase):
+    def setUp(self) -> None:
+        self.temporary_directory = tempfile.TemporaryDirectory(ignore_cleanup_errors=True)
+        self.root = Path(self.temporary_directory.name)
+        self.repo = self.root / "repo"
+        scripts = self.repo / "scripts"
+        scripts.mkdir(parents=True)
+        shutil.copy2(REPOSITORY_ROOT / "scripts" / BUILDER_NAME, scripts / BUILDER_NAME)
+        (scripts / "gitea-ci-job-image.sh").write_text("#!/usr/bin/env bash\nexit 0\n")
+        (scripts / "ci-rust-cache.sh").write_text("#!/usr/bin/env bash\nexit 0\n")
+        self.trace = self.root / "trace.log"
+        self.bin = self.root / "bin"
+        self.bin.mkdir()
+        self.write_fake_tools()
+        self.execution_bin = self.wsl_path(self.bin)
+        self.wsl_fake_root: str | None = None
+        if os.name == "nt":
+            self.wsl_fake_root = f"/tmp/gitea-cache-builder-{self.root.name}"
+            subprocess.run(
+                [
+                    "bash",
+                    "-c",
+                    "rm -rf {root}; mkdir -p {root}/bin; cp {source}/* {root}/bin/; chmod +x {root}/bin/*".format(
+                        root=shlex.quote(self.wsl_fake_root),
+                        source=shlex.quote(self.wsl_path(self.bin)),
+                    ),
+                ],
+                check=True,
+            )
+            self.execution_bin = f"{self.wsl_fake_root}/bin"
+
+    def tearDown(self) -> None:
+        if self.wsl_fake_root is not None:
+            subprocess.run(
+                ["bash", "-c", f"rm -rf {shlex.quote(self.wsl_fake_root)}"],
+                check=False,
+            )
+        self.temporary_directory.cleanup()
+
+    def write_tool(self, name: str, source: str) -> None:
+        target = self.bin / name
+        target.write_bytes(textwrap.dedent(source).encode("utf-8"))
+        target.chmod(target.stat().st_mode | stat.S_IXUSR)
+
+    def write_fake_tools(self) -> None:
+        self.write_tool(
+            "git",
+            """#!/usr/bin/env bash
+            set -eu
+            printf 'git:%s\\n' "$*" >> "$TRACE"
+            if [[ "$1" == '-C' ]]; then shift 2; fi
+            case "$1" in
+              fetch|cat-file) exit 0 ;;
+              merge-base)
+                [[ "${FAKE_NON_ANCESTOR:-}" != 1 ]]
+                exit
+                ;;
+              rev-parse)
+                if [[ "$2" == 'FETCH_HEAD^{commit}' ]]; then
+                  printf '%s\\n' "$FAKE_MASTER_SHA"
+                else
+                  printf '%s\\n' "$FAKE_FIXED_SHA"
+                fi
+                ;;
+              archive) printf 'archived %s\\n' "$2" ;;
+              *) echo "unexpected git command: $*" >&2; exit 9 ;;
+            esac
+            """,
+        )
+        self.write_tool(
+            "docker",
+            """#!/usr/bin/env bash
+            set -eu
+            # Drain the archive pipeline before logging to avoid concurrent
+            # appends to the shared trace on Windows/WSL filesystems.
+            if [[ "$1" == cp && "$2" == '-' ]]; then
+              cat >/dev/null
+            fi
+            printf 'docker:%s\\n' "$*" >> "$TRACE"
+            if [[ "$1" == image && "$2" == inspect ]]; then
+              printf 'sha256:%064d\\n' 0
+            elif [[ "$1" == run && " $* " == *' --detach '* ]]; then
+              printf 'fake-container\\n'
+            elif [[ "$1" == exec && " $* " == *' bash -s '* ]]; then
+              cat >/dev/null
+            fi
+            """,
+        )
+        self.write_tool(
+            "curl",
+            """#!/usr/bin/env bash
+            set -eu
+            while [[ "$#" -gt 0 ]]; do
+              if [[ "$1" == --output ]]; then touch "$2"; exit 0; fi
+              shift
+            done
+            exit 9
+            """,
+        )
+        self.write_tool("sha256sum", "#!/usr/bin/env bash\ncat >/dev/null\n")
+        self.write_tool(
+            "tar",
+            """#!/usr/bin/env bash
+            set -eu
+            while [[ "$#" -gt 0 ]]; do
+              if [[ "$1" == --directory ]]; then
+                mkdir -p "$2/sccache-v0.18.0-x86_64-unknown-linux-musl"
+                printf '#!/usr/bin/env bash\\nexit 0\\n' > "$2/sccache-v0.18.0-x86_64-unknown-linux-musl/sccache"
+                chmod +x "$2/sccache-v0.18.0-x86_64-unknown-linux-musl/sccache"
+                exit 0
+              fi
+              shift
+            done
+            exit 9
+            """,
+        )
+
+    @staticmethod
+    def wsl_path(path: Path) -> str:
+        value = path.resolve().as_posix()
+        if len(value) >= 3 and value[1] == ":":
+            return f"/mnt/{value[0].lower()}{value[2:]}"
+        return value
+
+    def run_builder(self, *arguments: str, non_ancestor: bool = False) -> subprocess.CompletedProcess[str]:
+        script_path = self.wsl_path(self.repo / "scripts" / BUILDER_NAME)
+        assignments = {
+            "TRACE": self.wsl_path(self.trace),
+            "FAKE_FIXED_SHA": FIXED_SHA,
+            "FAKE_MASTER_SHA": MASTER_SHA,
+            "FAKE_NON_ANCESTOR": "1" if non_ancestor else "",
+        }
+        exports = "; ".join(
+            f"export {name}={shlex.quote(value)}" for name, value in assignments.items()
+        )
+        command = (
+            f"unset CI; {exports}; export PATH={shlex.quote(self.execution_bin)}:\"$PATH\"; cd /; "
+            f"exec bash {shlex.quote(script_path)} "
+            + " ".join(shlex.quote(argument) for argument in arguments)
+        )
+        return subprocess.run(
+            ["bash", "-c", command],
+            env=os.environ,
+            text=True,
+            capture_output=True,
+            check=False,
+        )
+
+    def trace_text(self) -> str:
+        return self.trace.read_bytes().decode("utf-8", errors="replace")
+
+    def test_archives_requested_master_ancestor_and_uses_its_helper(self) -> None:
+        result = self.run_builder("trusted-base", "candidate", FIXED_SHA)
+        self.assertEqual(result.returncode, 0, result.stderr)
+        self.assertIn(f"snapshot_source={FIXED_SHA}", result.stdout)
+        trace = self.trace_text()
+        self.assertIn(f"archive {FIXED_SHA}", trace)
+        self.assertIn(
+            "docker:exec fake-container cp "
+            "/workspace/GenarrativeAI/Genarrative/scripts/ci-rust-cache.sh "
+            "/tmp/ci-rust-cache.sh",
+            trace,
+        )
+
+    def test_rejects_commit_outside_fetched_master(self) -> None:
+        result = self.run_builder("trusted-base", "candidate", FIXED_SHA, non_ancestor=True)
+        self.assertNotEqual(result.returncode, 0)
+        self.assertIn("not contained in fetched master", result.stderr)
+        self.assertNotIn(" archive ", self.trace_text())
+
+    def test_rejects_non_full_sha_before_calling_external_tools(self) -> None:
+        result = self.run_builder("trusted-base", "candidate", "abc123")
+        self.assertEqual(result.returncode, 2)
+        self.assertIn("complete 40-character SHA", result.stderr)
+        self.assertFalse(self.trace.exists())
+
+
+if __name__ == "__main__":
+    unittest.main()

scripts/test_gitea_cache_export.py

@@ -0,0 +1,205 @@
+"""master 产物的增量归档与 Gitea v4 上传协议回归。"""
+
+import hashlib
+import base64
+from contextlib import redirect_stdout
+from datetime import datetime, timezone
+from http.server import BaseHTTPRequestHandler, ThreadingHTTPServer
+import importlib.util
+import io
+import json
+import os
+from pathlib import Path
+import tarfile
+import tempfile
+import threading
+import unittest
+from unittest.mock import patch
+import urllib.parse
+import zipfile
+
+from gitea_cache_upload_cleanup import decode_owner
+
+
+spec = importlib.util.spec_from_file_location("cache_export", Path(__file__).with_name("export-gitea-rust-cache.py"))
+exporter = importlib.util.module_from_spec(spec)
+spec.loader.exec_module(exporter)
+
+
+class ExportTests(unittest.TestCase):
+    def setUp(self):
+        self.temp = tempfile.TemporaryDirectory()
+        self.addCleanup(self.temp.cleanup)
+        self.root = Path(self.temp.name)
+        (self.root / "objects").mkdir()
+
+    def object(self, key, value, mtime):
+        path = self.root / "objects" / key[0] / key[1] / key
+        path.parent.mkdir(parents=True, exist_ok=True)
+        path.write_bytes(value)
+        os.utime(path, ns=(mtime * 10**9, mtime * 10**9))
+        return path
+
+    def unpack(self, baseline, limit=1024):
+        destination = self.root / "snapshot.zip"
+        result = exporter.pack_snapshot(self.root, destination, {"job": "fixture"}, baseline, limit)
+        with zipfile.ZipFile(destination) as bundle:
+            self.assertEqual(bundle.namelist(), ["snapshot.tar"])
+            with tarfile.open(fileobj=io.BytesIO(bundle.read("snapshot.tar"))) as archive:
+                files = {member.name: archive.extractfile(member).read() for member in archive}
+        return result, json.loads(files.pop("manifest.json")), files
+
+    def test_delta_omits_hit_bytes_preserves_recency_and_exports_new_keys(self):
+        inherited = self.object("a" * 64, b"old", 10)
+        baseline_path = self.root / "baseline.json"
+        exporter.save_baseline(self.root, baseline_path)
+        baseline = json.loads(baseline_path.read_text())
+        # sccache 对命中对象更新 mtime，不能因此重复上传已有对象。
+        os.utime(inherited, ns=(20 * 10**9, 20 * 10**9))
+        self.object("b" * 64, b"new", 30)
+        result, manifest, files = self.unpack(baseline)
+        key = "objects/b/b/" + "b" * 64
+        self.assertEqual(result, (1, 3))
+        self.assertEqual(files, {key: b"new"})
+        self.assertEqual(manifest["mode"], "delta")
+        self.assertEqual(manifest["touched"], [{"path": "objects/a/a/" + "a" * 64, "mtime_ns": 20 * 10**9}])
+        self.assertEqual(manifest["objects"][0]["sha256"], hashlib.sha256(b"new").hexdigest())
+
+    def test_empty_delta_is_valid_and_changed_size_is_exported(self):
+        path = self.object("a" * 64, b"old", 10)
+        baseline = {"a/a/" + "a" * 64: {"size": 3, "mtime_ns": 10 * 10**9}}
+        self.assertEqual(self.unpack(baseline)[0], (0, 0))
+        path.write_bytes(b"replacement")
+        self.assertEqual(self.unpack(baseline)[0], (1, 11))
+
+    def test_capacity_prefers_newest_objects_and_excludes_unrelated_files(self):
+        self.object("a" * 64, b"old", 10)
+        self.object("b" * 64, b"new", 20)
+        (self.root / "objects" / "credentials").write_bytes(b"secret")
+        (self.root / "sccache").write_bytes(b"binary")
+        result, _, files = self.unpack({}, limit=3)
+        self.assertEqual(result, (1, 3))
+        self.assertEqual(list(files.values()), [b"new"])
+
+    @unittest.skipUnless(os.name == "posix", "symlink fixture requires POSIX")
+    def test_symlink_objects_and_subdirectories_are_not_exported(self):
+        outside = self.root / "secret"
+        outside.write_bytes(b"secret")
+        linked = self.object("a" * 64, b"old", 10)
+        linked.unlink()
+        linked.symlink_to(outside)
+        (self.root / "objects" / "b").symlink_to(self.root, target_is_directory=True)
+        self.assertEqual(self.unpack({})[0], (0, 0))
+
+    def test_non_master_and_unclean_shutdown_do_not_scan_or_upload(self):
+        with patch.object(exporter, "scan_objects", side_effect=AssertionError("must not scan")), \
+                patch.object(exporter, "upload_snapshot", side_effect=AssertionError("must not upload")):
+            exporter.export({"GITHUB_EVENT_NAME": "pull_request", "GITHUB_REF": "refs/heads/master"})
+            exporter.export({"GITHUB_EVENT_NAME": "push", "GITHUB_REF": "refs/heads/feature"})
+            exporter.export({"GITHUB_EVENT_NAME": "push", "GITHUB_REF": "refs/heads/master"})
+
+    def test_internal_repository_route_bypasses_rpc_only_gateway(self):
+        env = {
+            "GITHUB_REPOSITORY": "owner/repo",
+            "GITHUB_SERVER_URL": "http://fetch-gate:8080",
+            "GENARRATIVE_GITEA_REPOSITORY_URL": "http://gitea:3000/sub/owner/repo.git",
+        }
+        self.assertEqual(exporter.artifact_base_url(env), "http://gitea:3000/sub")
+        env["GENARRATIVE_GITEA_REPOSITORY_URL"] = "http://token@gitea:3000/owner/repo.git"
+        with self.assertRaises(ValueError):
+            exporter.artifact_base_url(env)
+
+    def test_native_v4_chunks_finalize_with_verified_size_and_hash(self):
+        calls = []
+
+        class Handler(BaseHTTPRequestHandler):
+            def log_message(self, *args):
+                pass
+
+            def do_POST(self):
+                body = json.loads(self.rfile.read(int(self.headers["Content-Length"])))
+                calls.append((self.command, self.path, dict(self.headers), body))
+                payload = {"ok": True}
+                if self.path.endswith("CreateArtifact"):
+                    payload["signedUploadUrl"] = "https://external.invalid/twirp/github.actions.results.api.v1.ArtifactService/UploadArtifact?sig=private&taskID=4&artifactID=8"
+                else:
+                    payload["artifactId"] = "8"
+                self.send_response(200)
+                self.end_headers()
+                self.wfile.write(json.dumps(payload).encode())
+
+            def do_PUT(self):
+                body = self.rfile.read(int(self.headers["Content-Length"]))
+                calls.append((self.command, self.path, dict(self.headers), body))
+                self.send_response(201)
+                self.end_headers()
+                self.wfile.write(b'"created"')
+
+        server = ThreadingHTTPServer(("127.0.0.1", 0), Handler)
+        thread = threading.Thread(target=server.serve_forever, daemon=True)
+        thread.start()
+        try:
+            path = self.root / "test.zip"
+            path.write_bytes(b"123456789")
+            with patch.object(exporter, "CHUNK_BYTES", 4):
+                exporter.upload_snapshot(path, "rust-cache-v1-backend-tests-attempt-1", 123, f"http://127.0.0.1:{server.server_port}", "ephemeral")
+        finally:
+            server.shutdown()
+            server.server_close()
+            thread.join()
+        self.assertEqual(len(calls), 6)
+        self.assertEqual(calls[0][3]["workflowRunBackendId"], "123")
+        remaining = datetime.fromisoformat(calls[0][3]["expiresAt"]) - datetime.now(timezone.utc)
+        self.assertGreater(remaining.total_seconds(), 7 * 24 * 3600)
+        self.assertLessEqual(remaining.total_seconds(), 8 * 24 * 3600)
+        blocks = calls[1:4]
+        self.assertEqual(b"".join(call[3] for call in blocks), b"123456789")
+        self.assertEqual(len({urllib.parse.parse_qs(urllib.parse.urlsplit(call[1]).query)["blockid"][0] for call in blocks}), 3)
+        for call in blocks:
+            block_id = urllib.parse.parse_qs(urllib.parse.urlsplit(call[1]).query)["blockid"][0]
+            gitea_filename_suffix = base64.urlsafe_b64encode(block_id.encode()).decode()
+            self.assertEqual(decode_owner(gitea_filename_suffix), ("backend-tests", 1))
+        self.assertTrue(all("Authorization" not in call[2] for call in calls[1:5]))
+        self.assertEqual(calls[-1][2]["Authorization"], "Bearer ephemeral")
+        self.assertEqual(calls[-1][3]["size"], "9")
+        self.assertEqual(calls[-1][3]["hash"], "sha256:" + hashlib.sha256(b"123456789").hexdigest())
+
+    def test_upload_failure_never_finalizes_an_incomplete_artifact(self):
+        path = self.root / "test.zip"
+        path.write_bytes(b"data")
+        with patch.object(exporter, "request", side_effect=[
+            {"ok": True, "signedUploadUrl": "http://gitea/twirp/github.actions.results.api.v1.ArtifactService/UploadArtifact?sig=x"},
+            RuntimeError("upload failed"),
+        ]) as request:
+            with self.assertRaisesRegex(RuntimeError, "upload failed"):
+                exporter.upload_snapshot(path, "rust-cache-v1-backend-tests-attempt-1", 123, "http://gitea", "ephemeral")
+            self.assertEqual(request.call_count, 2)
+
+    def test_failed_optional_export_never_emits_host_completion_marker(self):
+        (self.root / "export-baseline.json").write_text("{}")
+        (self.root / "rustc.txt").write_text("rustc fixture\n")
+        (self.root / "workspace.txt").write_text(str(Path.cwd().resolve()))
+        (self.root / "source-commit.txt").write_text("a" * 40)
+        self.object("b" * 64, b"new", 20)
+        env = {
+            "GITHUB_EVENT_NAME": "push", "GITHUB_REF": "refs/heads/master",
+            "GENARRATIVE_CI_RUST_CACHE_EXPORT_READY": "1",
+            "GITHUB_JOB": "backend-tests", "GITHUB_SHA": "b" * 40,
+            "GITHUB_RUN_ID": "123", "GITHUB_RUN_ATTEMPT": "1",
+            "GENARRATIVE_GITEA_TOKEN": "ephemeral",
+            "GITHUB_REPOSITORY": "owner/repo",
+            "GENARRATIVE_GITEA_REPOSITORY_URL": "http://gitea/owner/repo.git",
+            "GENARRATIVE_CI_RUST_CACHE_ROOT": str(self.root),
+        }
+        output = io.StringIO()
+        with patch.object(exporter.subprocess, "check_output", side_effect=["rustc fixture\n", "sccache 0.18.0\n"]), \
+                patch.object(exporter, "upload_snapshot", side_effect=RuntimeError("upload failed")), \
+                redirect_stdout(output):
+            with self.assertRaisesRegex(RuntimeError, "upload failed"):
+                exporter.export(env)
+        self.assertNotIn("complete=true", output.getvalue())
+        self.assertFalse((self.root / "export-baseline.json").exists())
+
+
+if __name__ == "__main__":
+    unittest.main()

scripts/test_gitea_cache_gate.py

@@ -0,0 +1,347 @@
+"""使用真实 HTTP/socket 验证领取屏障，不连接线上 Gitea。"""
+
+import http.client
+import http.server
+import gzip
+import importlib.util
+import json
+import os
+from pathlib import Path
+import socket
+import tempfile
+import threading
+import time
+import unittest
+
+if os.name != "posix":
+    raise unittest.SkipTest("领取屏障使用 Linux Unix socket 和目录 fsync；在 Linux/WSL 运行")
+
+SPEC = importlib.util.spec_from_file_location(
+    "gitea_cache_gate", Path(__file__).with_name("gitea-runner-fetch-gate.py"))
+MODULE = importlib.util.module_from_spec(SPEC)
+SPEC.loader.exec_module(MODULE)
+FETCH = "/api/actions/runner.v1.RunnerService/FetchTask"
+UPDATE = "/api/actions/runner.v1.RunnerService/UpdateTask"
+LOG = "/api/actions/runner.v1.RunnerService/UpdateLog"
+PING = "/api/actions/ping.v1.PingService/Ping"
+
+
+def varint(value):
+    data = bytearray()
+    while value > 127:
+        data.append((value & 127) | 128)
+        value >>= 7
+    data.append(value)
+    return bytes(data)
+
+
+def field(number, value):
+    # actions-proto-go v0.4.1: task/state ID=1; result=2; log task_id=1,
+    # index=2, rows=3, no_more=4; log response ack_index=1.
+    if isinstance(value, bytes):
+        return varint(number * 8 + 2) + varint(len(value)) + value
+    return varint(number * 8) + varint(value)
+
+
+def state(task_id, result=0):
+    return field(1, field(1, task_id) + field(2, result))
+
+
+def core_state(state):
+    return {key: state[key] for key in ("paused", "inflight", "uncertain")}
+
+
+class Upstream(http.server.BaseHTTPRequestHandler):
+    def log_message(self, *_args):
+        pass
+
+    def do_POST(self):
+        data = self.rfile.read(int(self.headers.get("Content-Length", 0)))
+        self.server.requests.append((self.path, data))
+        if self.path.endswith("/Redirect"):
+            self.send_response(302)
+            self.send_header("Location", "/api/actions/runner.v1.RunnerService/FetchTask")
+            self.send_header("Content-Length", "0")
+            self.end_headers()
+            return
+        if self.path == FETCH:
+            self.server.entered.set()
+            self.server.release.wait(10)
+        if self.server.truncated and self.path == FETCH:
+            self.send_response(200)
+            self.send_header("Content-Length", "100")
+            self.end_headers()
+            self.wfile.write(b"incomplete")
+            self.close_connection = True
+            return
+        body = self.server.responses.get(self.path, b"")
+        if self.path == UPDATE and self.path not in self.server.responses:
+            body = state(*map(int, MODULE.task_state(MODULE.protobuf_fields(data))))
+        if self.path == LOG and self.path not in self.server.responses:
+            fields = MODULE.protobuf_fields(data)
+            body = field(1, MODULE.single(fields, 2, 0) + len(fields.get(3, [])))
+        self.send_response(self.server.statuses.get(self.path, 200))
+        self.send_header("Content-Type", self.server.content_type)
+        if self.server.compressed:
+            body = gzip.compress(body)
+            self.send_header("Content-Encoding", "gzip")
+        self.send_header("Content-Length", str(len(body)))
+        self.end_headers()
+        self.wfile.write(body)
+
+
+class GateTests(unittest.TestCase):
+    def setUp(self):
+        self.temp = tempfile.TemporaryDirectory()
+        self.gate = MODULE.Gate(self.temp.name)
+        self.upstream = http.server.ThreadingHTTPServer(("127.0.0.1", 0), Upstream)
+        self.upstream.requests = []
+        self.upstream.entered = threading.Event()
+        self.upstream.release = threading.Event()
+        self.upstream.truncated = False
+        self.upstream.responses = {}
+        self.upstream.statuses = {}
+        self.upstream.content_type = "application/proto"
+        self.upstream.compressed = False
+        self.proxy = MODULE.create_proxy(("127.0.0.1", 0),
+            f"http://127.0.0.1:{self.upstream.server_port}", self.gate)
+        self.servers = [self.upstream, self.proxy]
+        for server in self.servers:
+            threading.Thread(target=server.serve_forever, daemon=True).start()
+
+    def tearDown(self):
+        self.upstream.release.set()
+        for server in reversed(self.servers):
+            server.shutdown()
+            server.server_close()
+        self.temp.cleanup()
+
+    def request(self, path, body=b"", chunked=False):
+        connection = http.client.HTTPConnection("127.0.0.1", self.proxy.server_port, timeout=5)
+        try:
+            if chunked:
+                connection.request("POST", path, body=[body], encode_chunked=True,
+                                   headers={"Content-Type": "application/proto"})
+            else:
+                connection.request("POST", path, body=body,
+                                   headers={"Content-Type": "application/proto"})
+            response = connection.getresponse()
+            result = response.status, response.read()
+            return result
+        finally:
+            connection.close()
+
+    def wait_for(self, predicate):
+        deadline = time.monotonic() + 3
+        while time.monotonic() < deadline:
+            if predicate():
+                return
+            time.sleep(0.01)
+        self.fail("condition did not become true")
+
+    def start_fetch(self):
+        self.result = []
+        thread = threading.Thread(target=lambda: self.result.append(self.request(FETCH)))
+        thread.start()
+        self.assertTrue(self.upstream.entered.wait(3))
+        return thread
+
+    def test_pause_holds_inflight_and_allows_reporting(self):
+        thread = self.start_fetch()
+        self.assertEqual(core_state(self.gate.control("pause")),
+            {"paused": True, "inflight": 1, "uncertain": False})
+        self.assertEqual(self.request(FETCH)[0], 503)
+        self.assertEqual(self.request(PING)[0], 200)
+        self.assertEqual(sum(path == FETCH for path, _ in self.upstream.requests), 1)
+        self.upstream.release.set()
+        thread.join(3)
+        self.assertFalse(thread.is_alive())
+        self.assertEqual(self.result[0][0], 200)
+        self.assertEqual(self.gate.control("status")["inflight"], 0)
+        self.assertEqual(self.gate.control("resume")["paused"], False)
+        self.assertEqual(self.request(FETCH)[0], 200)
+
+    def test_disconnected_client_does_not_release_upstream_request(self):
+        client = socket.create_connection(self.proxy.server_address, timeout=3)
+        client.sendall(f"POST {FETCH} HTTP/1.1\r\nHost: localhost\r\nContent-Length: 2\r\n\r\n{{}}".encode())
+        self.assertTrue(self.upstream.entered.wait(3))
+        client.close()
+        state = self.gate.control("pause")
+        self.assertEqual(state["inflight"], 1)
+        self.upstream.release.set()
+        self.wait_for(lambda: self.gate.control("status")["inflight"] == 0)
+        self.assertFalse(self.gate.control("status")["uncertain"])
+
+    def test_truncated_upstream_latches_uncertainty_across_restart(self):
+        self.upstream.truncated = True
+        self.upstream.release.set()
+        self.assertEqual(self.request(FETCH)[0], 502)
+        self.wait_for(lambda: self.gate.control("status")["uncertain"])
+        self.assertTrue(self.gate.control("resume")["paused"])
+        restored = MODULE.Gate(self.temp.name)
+        self.assertTrue(restored.control("status")["uncertain"])
+        self.assertFalse(restored.enter())
+
+    def test_crashed_inflight_is_not_treated_as_successful_drain(self):
+        self.assertTrue(self.gate.enter())
+        restored = MODULE.Gate(self.temp.name)
+        self.assertTrue(restored.control("status")["uncertain"])
+        self.assertIn("error", restored.control("resume"))
+        self.gate.leave(True)
+
+    def test_pause_marker_survives_restart(self):
+        self.gate.control("pause")
+        restored = MODULE.Gate(self.temp.name)
+        self.assertEqual(core_state(restored.control("status")),
+            {"paused": True, "inflight": 0, "uncertain": False})
+        restored.control("resume")
+        self.assertFalse(MODULE.Gate(self.temp.name).control("status")["paused"])
+
+    def test_chunked_body_is_decoded_and_non_rpc_path_rejected(self):
+        self.assertEqual(self.request(PING, b"ping", chunked=True)[0], 200)
+        self.assertEqual(self.upstream.requests[-1], (PING, b"ping"))
+        self.assertEqual(self.request("/api/v1/repos")[0], 404)
+        self.assertEqual(self.request("/api/actions/../v1/repos")[0], 404)
+
+    def test_upstream_redirect_is_not_followed(self):
+        self.assertEqual(self.request("/api/actions/runner.v1.RunnerService/Redirect")[0], 302)
+        self.assertFalse(self.upstream.entered.is_set())
+        self.assertEqual(len(self.upstream.requests), 1)
+
+    def test_connection_refused_before_rpc_does_not_latch_uncertainty(self):
+        with socket.socket() as unused:
+            unused.bind(("127.0.0.1", 0))
+            port = unused.getsockname()[1]
+            self.proxy.upstream = MODULE.urllib.parse.urlsplit(f"http://127.0.0.1:{port}")
+            self.assertEqual(self.request(FETCH)[0], 502)
+        self.assertEqual(core_state(self.gate.control("status")),
+            {"paused": False, "inflight": 0, "uncertain": False})
+
+    @unittest.skipUnless(hasattr(socket, "AF_UNIX"), "Unix control socket required")
+    def test_control_socket_uses_newline_json(self):
+        path = str(Path(self.temp.name) / "gate.sock")
+        control = MODULE.ControlServer(path, MODULE.Control)
+        control.gate = self.gate
+        self.servers.append(control)
+        threading.Thread(target=control.serve_forever, daemon=True).start()
+        with socket.socket(socket.AF_UNIX, socket.SOCK_STREAM) as client:
+            client.connect(path)
+            client.sendall(b'{"action":"pause"}\n')
+            payload = client.makefile("rb").readline()
+        self.assertEqual(core_state(json.loads(payload)),
+            {"paused": True, "inflight": 0, "uncertain": False})
+
+    def test_paused_fetch_records_live_route_and_restart_discards_proof(self):
+        self.gate.control("pause")
+        before = time.time()
+        self.assertEqual(self.request(FETCH)[0], 503)
+        state = self.gate.control("status")
+        self.assertEqual(state["last_fetch_peer"], "127.0.0.1")
+        self.assertGreaterEqual(state["last_fetch_at"], before)
+        self.assertEqual(self.upstream.requests, [])
+        self.assertEqual(self.request(PING)[0], 200)
+        self.assertEqual(self.gate.control("status")["last_fetch_at"], state["last_fetch_at"])
+        restarted = MODULE.Gate(self.temp.name).control("status")
+        self.assertIsNone(restarted["last_fetch_peer"])
+        self.assertIsNone(restarted["last_fetch_at"])
+
+    def fetch_task(self, task_id=42):
+        self.upstream.responses[FETCH] = field(1, field(1, task_id)) + field(2, 10)
+        self.upstream.release.set()
+        self.assertEqual(self.request(FETCH)[0], 200)
+        self.assertEqual(self.gate.control("status")["task_ids"], [str(task_id)])
+
+    def finalize_log(self, task_id=42):
+        self.assertEqual(self.request(LOG, field(1, task_id) + field(2, 3)
+                                      + field(3, b"log row") + field(4, 1))[0], 200)
+        self.wait_for(lambda: self.gate.tasks.get(str(task_id)) is True)
+
+    def test_assigned_task_survives_pause_until_runner_finished_reporting(self):
+        self.fetch_task()
+        self.assertEqual(self.gate.control("pause")["active_tasks"], 1)
+        self.assertEqual(self.request(FETCH)[0], 503)
+        self.assertEqual(self.request(UPDATE, state(42, 1))[0], 200)
+        self.assertEqual(self.gate.control("status")["active_tasks"], 1)
+        self.finalize_log()
+        self.assertEqual(self.gate.control("status")["active_tasks"], 1)
+        self.assertEqual(self.request(UPDATE, state(42, 1))[0], 200)
+        self.wait_for(lambda: self.gate.control("status")["active_tasks"] == 0)
+        self.assertFalse(self.gate.control("status")["uncertain"])
+        # 终态响应在客户端超时后重试，不应再次阻断后续任务领取。
+        self.request(UPDATE, state(42, 1))
+        self.assertFalse(self.gate.control("status")["uncertain"])
+
+    def test_compressed_fetch_and_task_ledger_survive_restart(self):
+        self.upstream.compressed = True
+        self.fetch_task()
+        restored = MODULE.Gate(self.temp.name)
+        self.assertEqual(restored.control("status")["task_ids"], ["42"])
+        self.assertFalse(restored.control("status")["uncertain"])
+        self.proxy.gate = self.gate = restored
+        self.finalize_log()
+        self.request(UPDATE, state(42, 2))
+        self.wait_for(lambda: self.gate.control("status")["active_tasks"] == 0)
+        self.assertEqual(MODULE.Gate(self.temp.name).control("status")["active_tasks"], 0)
+
+    def test_server_cancellation_does_not_retire_executing_task(self):
+        self.fetch_task()
+        self.upstream.responses[UPDATE] = state(42, 3)
+        self.request(UPDATE, state(42))
+        self.assertEqual(self.gate.control("status")["active_tasks"], 1)
+        self.finalize_log()
+        self.request(UPDATE, state(42))
+        self.assertEqual(self.gate.control("status")["active_tasks"], 1)
+        self.request(UPDATE, state(42, 3))
+        self.wait_for(lambda: self.gate.control("status")["active_tasks"] == 0)
+
+    def test_partial_final_log_acknowledgement_keeps_task_active(self):
+        self.fetch_task()
+        self.upstream.responses[LOG] = field(1, 3)
+        self.request(LOG, field(1, 42) + field(2, 3) + field(3, b"row") + field(4, 1))
+        self.request(UPDATE, state(42, 1))
+        self.assertEqual(self.gate.control("status")["active_tasks"], 1)
+        del self.upstream.responses[LOG]
+        self.finalize_log()
+        self.request(UPDATE, state(42, 1))
+        self.wait_for(lambda: self.gate.control("status")["active_tasks"] == 0)
+
+    def test_final_state_waits_for_success_and_output_acknowledgement(self):
+        self.fetch_task()
+        self.finalize_log()
+        self.upstream.statuses[UPDATE] = 500
+        self.request(UPDATE, state(42, 1))
+        self.assertEqual(self.gate.control("status")["active_tasks"], 1)
+        self.upstream.statuses[UPDATE] = 200
+        output = field(2, field(1, b"key") + field(2, b"value"))
+        self.request(UPDATE, state(42, 1) + output)
+        self.assertEqual(self.gate.control("status")["active_tasks"], 1)
+        self.upstream.responses[UPDATE] = state(42, 1) + field(2, b"key")
+        self.request(UPDATE, state(42, 1) + output)
+        self.wait_for(lambda: self.gate.control("status")["active_tasks"] == 0)
+
+    def test_unknown_or_invalid_fetch_result_prevents_idle(self):
+        self.upstream.release.set()
+        self.upstream.responses[FETCH] = b"not protobuf"
+        self.assertEqual(self.request(FETCH)[0], 200)
+        self.assertTrue(self.gate.control("status")["uncertain"])
+        self.assertTrue(MODULE.Gate(self.temp.name).control("status")["uncertain"])
+
+    def test_task_report_without_observed_assignment_requires_idle_bootstrap(self):
+        self.assertEqual(self.request(UPDATE, state(42))[0], 200)
+        self.wait_for(lambda: self.gate.control("status")["uncertain"])
+        self.assertIn("error", self.gate.control("resume"))
+
+    def test_disconnected_fetch_client_still_leaves_assigned_task_busy(self):
+        self.upstream.responses[FETCH] = field(1, field(1, 42))
+        client = socket.create_connection(self.proxy.server_address, timeout=3)
+        client.sendall(f"POST {FETCH} HTTP/1.1\r\nHost: localhost\r\nContent-Length: 0\r\n\r\n".encode())
+        self.assertTrue(self.upstream.entered.wait(3))
+        client.close()
+        self.gate.control("pause")
+        self.upstream.release.set()
+        self.wait_for(lambda: self.gate.control("status")["inflight"] == 0)
+        self.assertEqual(self.gate.control("status")["task_ids"], ["42"])
+
+
+if __name__ == "__main__":
+    unittest.main()

scripts/test_gitea_cache_snapshot.py

@@ -0,0 +1,240 @@
+#!/usr/bin/env python3
+"""Tests for streamed Gitea sccache snapshot validation and merging."""
+
+from __future__ import annotations
+
+import hashlib
+import importlib.util
+import io
+import json
+from pathlib import Path
+import os
+import sys
+import tarfile
+import tempfile
+import unittest
+import zipfile
+
+
+SCRIPT = Path(__file__).with_name("gitea_cache_snapshot.py")
+SPEC = importlib.util.spec_from_file_location("gitea_cache_snapshot", SCRIPT)
+assert SPEC and SPEC.loader
+snapshot = importlib.util.module_from_spec(SPEC)
+sys.modules[SPEC.name] = snapshot
+SPEC.loader.exec_module(snapshot)
+
+REPOSITORY = "team/project"
+SOURCE_SHA = "a" * 40
+INHERITED_SOURCE_SHA = "c" * 40
+BASE_IMAGE = "sha256:" + "b" * 64
+RUSTC = "rustc 1.90.0\nbinary: rustc\n"
+WORKSPACE = "/workspace/GenarrativeAI/Genarrative"
+SCCACHE_VERSION = "0.18.0"
+
+
+def object_path(character: str) -> str:
+    key = character * 64
+    return f"objects/{key[0]}/{key[1]}/{key}"
+
+
+class SnapshotMergeTest(unittest.TestCase):
+    def setUp(self) -> None:
+        self.temporary_directory = tempfile.TemporaryDirectory(ignore_cleanup_errors=True)
+        self.root = Path(self.temporary_directory.name).resolve()
+        self.base = self.root / "base-objects"
+        self.base.mkdir()
+
+    def tearDown(self) -> None:
+        self.temporary_directory.cleanup()
+
+    def identity(self, job: str, run_id: int) -> object:
+        return snapshot.ArtifactIdentity(REPOSITORY, run_id, 1, job, SOURCE_SHA)
+
+    def archive(
+        self,
+        name: str,
+        job: str,
+        run_id: int,
+        objects: list[tuple[str, bytes, int]],
+        *,
+        prefix: bool = True,
+        manifest_update=None,
+        extra_member: tuple[str, bytes, str] | None = None,
+        touched: list[tuple[str, int]] | None = None,
+    ) -> object:
+        rows = [
+            {
+                "path": path,
+                "size": len(contents),
+                "sha256": hashlib.sha256(contents).hexdigest(),
+                "mtime_ns": mtime_ns,
+            }
+            for path, contents, mtime_ns in objects
+        ]
+        manifest = {
+            "schema": 1,
+            "repository": REPOSITORY,
+            "run_id": run_id,
+            "run_attempt": 1,
+            "job": job,
+            "source_sha": SOURCE_SHA,
+            "base_image": BASE_IMAGE,
+            "rustc": RUSTC,
+            "workspace": WORKSPACE,
+            "sccache_version": SCCACHE_VERSION,
+            "mode": "delta",
+            "inherited_source_sha": INHERITED_SOURCE_SHA,
+            "objects": rows,
+            "touched": [
+                {"path": path, "mtime_ns": mtime_ns}
+                for path, mtime_ns in (touched or [])
+            ],
+        }
+        if manifest_update is not None:
+            manifest_update(manifest)
+
+        tar_bytes = io.BytesIO()
+        with tarfile.open(fileobj=tar_bytes, mode="w") as bundle:
+            for path, contents, _ in objects:
+                info = tarfile.TarInfo(path)
+                info.size = len(contents)
+                bundle.addfile(info, io.BytesIO(contents))
+            if extra_member is not None:
+                path, contents, kind = extra_member
+                info = tarfile.TarInfo(path)
+                if kind == "symlink":
+                    info.type = tarfile.SYMTYPE
+                    info.linkname = "manifest.json"
+                    bundle.addfile(info)
+                else:
+                    info.size = len(contents)
+                    bundle.addfile(info, io.BytesIO(contents))
+            manifest_bytes = json.dumps(manifest, separators=(",", ":")).encode()
+            info = tarfile.TarInfo("manifest.json")
+            info.size = len(manifest_bytes)
+            bundle.addfile(info, io.BytesIO(manifest_bytes))
+
+        archive = self.root / f"{name}.zip"
+        member = f"{name}/snapshot.tar" if prefix else "snapshot.tar"
+        with zipfile.ZipFile(archive, "w", compression=zipfile.ZIP_STORED) as bundle:
+            bundle.writestr(member, tar_bytes.getvalue())
+        return snapshot.ArtifactInput(archive, self.identity(job, run_id))
+
+    def base_object(self, path: str, contents: bytes, mtime_ns: int) -> None:
+        target = self.base.joinpath(*Path(path).parts[1:])
+        target.parent.mkdir(parents=True, exist_ok=True)
+        target.write_bytes(contents)
+        os.utime(target, ns=(mtime_ns, mtime_ns))
+
+    def merge(self, inputs, output=None, maximum=1024 ** 3):
+        return snapshot.merge_snapshots(
+            inputs,
+            output or self.root / "merged",
+            base_objects=self.base,
+            expected_inherited_source_sha=INHERITED_SOURCE_SHA,
+            max_combined_bytes=maximum,
+        )
+
+    def test_merges_groups_deduplicates_newest_mtime_and_prunes_to_bound(self) -> None:
+        first_path = object_path("a")
+        second_path = object_path("b")
+        third_path = object_path("c")
+        inherited_path = object_path("d")
+        self.base_object(inherited_path, b"dd", 50)
+        inputs = [
+            self.archive("first", "Backend tests", 41, [
+                (first_path, b"aaaa", 100),
+                (second_path, b"bbbb", 200),
+            ]),
+            self.archive("second", "Native shell tests", 41, [
+                (first_path, b"aaaa", 300),
+                (third_path, b"ccc", 250),
+            ], prefix=False, touched=[(inherited_path, 400)]),
+        ]
+
+        output = self.root / "merged"
+        result = self.merge(inputs, output, maximum=9)
+
+        self.assertEqual((result.object_count, result.total_bytes), (3, 9))
+        self.assertEqual((output / inherited_path).read_bytes(), b"dd")
+        self.assertEqual((output / first_path).read_bytes(), b"aaaa")
+        self.assertEqual((output / third_path).read_bytes(), b"ccc")
+        self.assertFalse((output / second_path).exists())
+        self.assertEqual((output / "rustc.txt").read_text(), RUSTC)
+        self.assertEqual((output / "workspace.txt").read_text(), WORKSPACE + "\n")
+        self.assertEqual((output / "source-commit.txt").read_text(), SOURCE_SHA + "\n")
+        self.assertEqual((output / "base-image.txt").read_text(), BASE_IMAGE + "\n")
+        self.assertFalse((output / "sccache").exists())
+
+    def test_rejects_traversal_member_without_creating_output(self) -> None:
+        item = self.archive(
+            "traversal", "Backend tests", 42, [],
+            extra_member=("../outside", b"bad", "file"),
+        )
+        output = self.root / "merged"
+        with self.assertRaisesRegex(snapshot.SnapshotError, "invalid sccache object path"):
+            self.merge([item], output)
+        self.assertFalse(output.exists())
+        self.assertFalse((self.root / "outside").exists())
+
+    def test_rejects_checksum_mismatch(self) -> None:
+        path = object_path("d")
+
+        def corrupt(manifest):
+            manifest["objects"][0]["sha256"] = "0" * 64
+
+        item = self.archive(
+            "checksum", "Backend tests", 43, [(path, b"content", 1)],
+            manifest_update=corrupt,
+        )
+        with self.assertRaisesRegex(snapshot.SnapshotError, "checksums do not match"):
+            self.merge([item])
+
+    def test_rejects_manifest_identity_mismatch(self) -> None:
+        item = self.archive(
+            "identity", "Backend tests", 44, [],
+            manifest_update=lambda manifest: manifest.update(run_id=999),
+        )
+        with self.assertRaisesRegex(snapshot.SnapshotError, "run_id does not match"):
+            self.merge([item])
+
+    def test_rejects_conflicting_duplicate_key(self) -> None:
+        path = object_path("e")
+        inputs = [
+            self.archive("conflict-one", "Backend tests", 45, [(path, b"one", 1)]),
+            self.archive("conflict-two", "Native shell tests", 45, [(path, b"two", 2)]),
+        ]
+        with self.assertRaisesRegex(snapshot.SnapshotError, "conflicting content"):
+            self.merge(inputs)
+
+    def test_rejects_delta_that_conflicts_with_inherited_key(self) -> None:
+        path = object_path("f")
+        self.base_object(path, b"base", 1)
+        item = self.archive("base-conflict", "Backend tests", 46, [(path, b"evil", 2)])
+        with self.assertRaisesRegex(snapshot.SnapshotError, "conflicting content"):
+            self.merge([item])
+
+    def test_accepts_empty_delta(self) -> None:
+        item = self.archive("empty", "Backend tests", 47, [])
+        output = self.root / "merged"
+        result = self.merge([item], output)
+        self.assertEqual((result.object_count, result.total_bytes), (0, 0))
+        self.assertEqual(list((output / "objects").iterdir()), [])
+
+    def test_rejects_noncanonical_base_entry(self) -> None:
+        (self.base / "unexpected").write_bytes(b"not an object")
+        item = self.archive("base-path", "Backend tests", 48, [])
+        with self.assertRaisesRegex(snapshot.SnapshotError, "noncanonical entry"):
+            self.merge([item])
+
+    def test_rejects_tar_links(self) -> None:
+        item = self.archive(
+            "link", "Backend tests", 49, [],
+            extra_member=(object_path("9"), b"", "symlink"),
+        )
+        with self.assertRaisesRegex(snapshot.SnapshotError, "regular file"):
+            self.merge([item])
+
+
+if __name__ == "__main__":
+    unittest.main()

scripts/test_gitea_cache_upload_cleanup.py

@@ -0,0 +1,90 @@
+"""缓存上传残块清理只触碰已确认结束的过期自有文件。"""
+
+import base64
+import os
+from pathlib import Path
+import tempfile
+import unittest
+
+from gitea_cache_upload_cleanup import cleanup_upload_chunks, decode_owner
+
+
+class UploadCleanupTests(unittest.TestCase):
+    def setUp(self):
+        self.temp = tempfile.TemporaryDirectory()
+        self.addCleanup(self.temp.cleanup)
+        self.root = Path(self.temp.name).resolve()
+
+    def file(self, name, run=12, age=10):
+        directory = self.root / "tmp-upload" / f"run-{run}-v4"
+        directory.mkdir(parents=True, exist_ok=True)
+        path = directory / name
+        path.write_bytes(b"block data")
+        os.utime(path, (age, age))
+        return path
+
+    def block(self, artifact=34, run=12, age=10, marker="genarrative-rust-cache-v1:backend-tests:1:00000000"):
+        encoded = base64.urlsafe_b64encode(base64.b64encode(marker.encode())).decode()
+        return self.file(f"block-{run}-{artifact}-10-{encoded}", run, age)
+
+    def test_old_owned_blocks_and_associated_blocklist_are_deleted(self):
+        block = self.block()
+        blocklist = self.file("12-34-blocklist")
+        self.assertEqual(cleanup_upload_chunks(self.root, {12}, 20), 2)
+        self.assertFalse(block.exists())
+        self.assertFalse(blocklist.exists())
+        self.assertTrue(block.parent.is_dir())
+
+    def test_other_runs_artifacts_and_unproven_blocklists_remain(self):
+        own = self.block()
+        other_run = self.block(run=13)
+        other_artifact = self.block(artifact=35, marker="unrelated-upload")
+        unproven = self.file("12-36-blocklist")
+        self.assertEqual(cleanup_upload_chunks(self.root, {12}, 20), 1)
+        self.assertFalse(own.exists())
+        self.assertTrue(all(path.exists() for path in (other_run, other_artifact, unproven)))
+
+    def test_young_or_unknown_member_protects_entire_artifact_group(self):
+        own = self.block()
+        young = self.file("12-34-blocklist", age=20)
+        other = self.block(artifact=35)
+        unknown = self.file("block-12-35-invalid-size-unknown")
+        self.assertEqual(cleanup_upload_chunks(self.root, {12}, 20), 0)
+        self.assertTrue(all(path.exists() for path in (own, young, other, unknown)))
+
+    def test_completely_unknown_file_protects_entire_run(self):
+        block = self.block()
+        self.file("unknown")
+        self.assertEqual(cleanup_upload_chunks(self.root, {12}, 20), 0)
+        self.assertTrue(block.exists())
+
+    @unittest.skipUnless(os.name == "posix", "symlink fixture requires POSIX")
+    def test_symlinks_never_traversed_or_deleted(self):
+        block = self.block()
+        outside = self.root / "secret"
+        outside.write_text("keep")
+        (block.parent / "12-34-blocklist").symlink_to(outside)
+        (self.root / "tmp-upload" / "run-13-v4").symlink_to(block.parent, target_is_directory=True)
+        self.assertEqual(cleanup_upload_chunks(self.root, {12, 13}, 20), 0)
+        self.assertTrue(block.exists())
+        self.assertEqual(outside.read_text(), "keep")
+        linked = self.root / "root-link"
+        linked.symlink_to(self.root, target_is_directory=True)
+        with self.assertRaises(ValueError):
+            cleanup_upload_chunks(linked, {12}, 20)
+
+    def test_root_missing_or_relative_is_an_error(self):
+        with self.assertRaises(FileNotFoundError):
+            cleanup_upload_chunks(self.root / "missing", {12}, 20)
+        with self.assertRaises(ValueError):
+            cleanup_upload_chunks(Path("relative"), {12}, 20)
+
+    def test_noncanonical_encoding_and_unknown_job_are_not_owned(self):
+        for marker in ("genarrative-rust-cache-v1:other-job:1:00000000", "genarrative-rust-cache-v1:backend-tests:01:00000000"):
+            encoded = base64.urlsafe_b64encode(base64.b64encode(marker.encode())).decode()
+            self.assertIsNone(decode_owner(encoded))
+        self.assertIsNone(decode_owner("not-base64"))
+
+
+if __name__ == "__main__":
+    unittest.main()