STM32F4-Base/.gitea/workflows/ci.yml

# Gitea Actions CI —— STM32F4-Base 持续集成
#
# 覆盖范围（**只做不依赖硬件的层**，见 docs/测试说明/测试开发标准流程.md §1/§9）：
#   静态门禁 static = pre-commit 全部钩子（等价本地 `pre-commit run --all-files`）
#   主机侧纯逻辑单测 host-unit = test/host/**（MSVC 离线编译，零硬件）
#
#   ⛔ 板端测试套件（test/board/，需真机 + ST-LINK）/ 主机侧回归（@test 闭环）/ 人工目检
#      **不上 CI** —— 需要开发板与烧录器，只能在本地跑。
#
# 明确不做的两件事（都是刻意为之）：
#   1. `@build`（Keil UV4）—— 需本机 Keil 授权，runner 上不具备；且静态门禁的 cppcheck +
#      代码规范已覆盖"编译前的静态问题"，真编译仍是开发者的本地红线（AGENTS.md）。
#   2. `mem-numbers` / `mem-budget` 两根钩子 —— 事实源都是 `MDK-ARM/**/*.map`（Keil
#      构建产物、已 gitignore），无 `@build` 即无 `.map`。故本 workflow 在**检测不到
#      .map 时自动跳过它们**（见下方 "决定跳过哪些钩子" 步骤），有 .map 的 runner 照常跑。
#
# 🔴 体积门禁：盲区已关闭为**强制路径**（2026-10-25 起；原先只做到"声明"）
#   跳过钩子只解释了"runner 没有 Keil"，没解决**"没跑 = 通过"**：钩子在无 .map 时
#   自适应 SKIP 并返回 0，于是 CI 全绿仍可能被读成"体积也守住了"。现由静态门禁作业**最后
#   一步** `python scripts/check_size_gate.py --ci` 在**不需要 Keil** 的前提下补两条判据：
#     · 同码性：`scripts/size_attestation.json` 的源码指纹必须等于本次检出树的指纹，
#       而该凭证只能由"新鲜 .map + 当时未超线"的真实链接测量写出（见 --stamp 三道前置）
#       ——等价于"这份代码至少被 Keil 链接并核算过一次"；
#     · 红线：该次测量记录的受管区占比 ≤92%，与 `mem-budget` 同一常数同一口径。
#   强制落点 = **主干 push**（唯一能保证"这就是要发出去的那份"的位置）；其余事件降级为
#   `::warning::`——任务分支上的代码尚未定型，拦红只制造噪音，还会诱发多条道同时
#   抢写 scripts/ 台账。仍守不住的（**口径正文唯一**在 scripts/check_size_gate.py 的
#   模块 docstring，此处不重复）：绝对数字由本地真实构建产生（runner 无 Keil 许可证）、
#   编译器选项（uvprojx，UV4 每次改写且不入库）不在指纹范围内。
#
# 产物存档与结果可见性（2026-10-02 起）：两个 job 把关键输出 `Tee-Object` 到 `ci-artifacts/*.log`，
#   并写 $GITHUB_STEP_SUMMARY（Gitea UI 直接可见）+ `::notice::` 汇总行。
#   **刻意不用 `actions/upload-artifact`**——内网可能拉不到外层 action（见 docs/CI/远程CI完整指南.md §5.3）；
#   零依赖方案下日志留在 runner 工作区，UI 通过 step-summary 即可排障。
#   ⚠️ `ci-artifacts/` 已 gitignore（运行时产物）。
#
# 触发：push（除纯文档路径外）与 pull_request。
#
# 🔴 shell 用 `powershell` 而非 `pwsh`（2026-10-02 实测修正）：
#   `pwsh` = PowerShell 7，**不是 Windows 自带**；本机 runner 只有
#   Windows PowerShell 5.1（`C:\Windows\System32\WindowsPowerShell\v1.0\`），
#   用 `shell: pwsh` 会直接报 `Cannot find: pwsh in PATH` → job 失败（跑不到任何业务逻辑）。
#   `shell: powershell` 在任意 Windows 上都存在。
#
# 🔴🔴 `run:` 脚本内容必须【纯 ASCII】（2026-10-02 第二次实测修正）：
#   runner 把每个 `run:` 块写入临时 `.ps1`（`...\act\workflow\N.ps1`）再交给
#   Windows PowerShell 5.1 执行，而该临时文件**无 BOM** → PS 5.1 按 **GBK/CP936** 解码。
#   脚本里的 UTF-8 中文字节会与相邻引号错位 → 报
#     `TerminatorExpectedAtEndOfString` / `字符串缺少终止符: "` / `缺少右"}"`
#   （报错行号正是含中文的那一行，极易误判为逻辑错误）。
#   **故本文件所有 `run:` 块内零非 ASCII**（中文仅出现在 YAML 的 name:/注释里——
#   那些由 Gitea 按 UTF-8 读，不喂给 PowerShell，安全）。
#   ⚠️ 与 AGENTS.md「字符串字面量必须纯 ASCII」同源；改脚本时务必守住。
#
# 🔴🔴 工具链探测必须【可离线自测 + 保留机器级安装兜底】（2026-10-11 第三次实测修正）：
#   `33a4aa4`（DTU_* 变量改造）把 Python 探测内联进本文件，并把候选**收窄成两个**
#   （PATH python + 仓库 .venv）——而 runner 上这两个都是死路：
#     · SYSTEM 账号的 PATH python = `C:\msys64\ucrt64\bin\python.exe`，**没有** pre-commit；
#     · 仓库 `.venv` 已 gitignore，runner 的全新工作区里**根本不存在**。
#   唯一可用的机器级解释器（`C:\ProgramData\anaconda3\python.exe`）不再被探测，而文档
#   要求的机器级 `DTU_PRECOMMIT_PYTHON` 从未设置（Machine 作用域一个 DTU_* 都没有）
#   → run 14/15 的静态门禁 **全部死在"环境自检"，一个钩子都没跑**。cppcheck 同理：
#   旧写法"不在 PATH 就把 C:\Program Files\Cppcheck 加进 PATH"的兜底也被删了。
#   **故探测逻辑搬进 `scripts/ci_find_python.ps1`**（两个 job 共用、可离线跑、失败时
#   打印全部候选），并恢复常见机器级安装位置兜底；`DTU_*` 仍是最高优先级、
#   且"显式设置就必须有效、不静默回退"的语义不变。
#
# 🔴 gitlint 属 commit-msg stage，`--all-files` **永远跑不到它**（2026-10-11 审计）：
#   `.pre-commit-config.yaml` 里 gitlint 那一条**永远不进 CI 报告**（报告数 = 定义数 − 1；
#   2026-10-12 实测 `master` 18 定义 / 17 报告、`v2-on-ui` 26 定义 / 25 报告）——
#   缺的正是 gitlint：`stages: [commit-msg]` 写在 **gitlint 上游的 .pre-commit-hooks.yaml**
#   里（项目配置里 grep 不到这一行），而 `pre-commit run --all-files` 只跑 pre-commit stage。
#   即 AGENTS.md 的"单行中文标题 ≤100 字符"门禁**本地有、CI 无**，
#   且表现为"全绿"而非失败，所以一直没人发现。现由 `scripts/ci_gitlint_range.ps1`
#   逐条校验本次 push/PR 引入的提交（消息文件必须写在**仓库内**且 **UTF-8 无 BOM**：
#   跨盘符会被 pre-commit 拒绝 `path is on mount 'C:', start on mount 'D:'`，
#   BOM 会占掉标题 1 个字符、扭曲 100 上限）。
#
# 🔴 写 `GITHUB_ENV` / `GITHUB_PATH` / `GITHUB_OUTPUT` 必须显式 `-Encoding ascii`
#   （2026-10-11 实测）：PS 5.1 的 `Out-File -Append` **默认 UTF-16LE**——往 runner
#   用 UTF-8 建的同一个文件里追加，落盘就是 `B\x00B\x00B\x00=\x001\x00` 这种带 NUL 的行
#   （实测字节：`42 00 42 00 42 00 3D 00 31 00`）。本文件写入的这些键值全是 ASCII，
#   故统一显式 ascii；`GITHUB_STEP_SUMMARY` 是 Markdown，保持 utf8。
#
# ⚠️ 前置（部署到 Gitea 时需确认）：
#   - 该 Gitea 实例已启用 Actions：`[actions] ENABLED = true`（site admin 配置）
#   - 已注册一个 **Windows** runner（labels 含 `windows`），且装有：
#       Python 3.x、cppcheck、pre-commit、MSVC（VS2019/2022 的 C++ 工具链 + Windows SDK）
#   - 缺 MSVC 时主机侧单测步骤会**降级为提示并跳过**（不硬失败），但会打印醒目 WARNING
#
# 🔧 runner 机器级环境变量（可选项覆盖；runner 以 SYSTEM 服务运行，用户级变量不可见）：
#   DTU_PRECOMMIT_PYTHON / DTU_CPPCHECK / DTU_MSVC_CL —— 未设置时按 PATH / 标准 VS 布局自动发现。
#   变量显式设置但值无效时 job 直接报变量名并失败（不静默回退）。配置方法见
#   docs/环境与部署/本地工具路径环境变量方案.md §5.3。
#
# 本地等价命令（与 CI 同一套判定，见 scripts/ci_local.py）：
#   & '.venv\Scripts\python.exe' scripts/ci_local.py

name: CI

on:
  push:
    branches: ['**']
    paths-ignore:
      - 'docs/**'
      - '**/*.md'
      - '.workbuddy-ai/**'
  pull_request:
    paths-ignore:
      - 'docs/**'
      - '**/*.md'
      - '.workbuddy-ai/**'
  workflow_dispatch:

# 同一分支的旧运行自动取消，省 runner
concurrency:
  group: ci-${{ github.ref }}
  cancel-in-progress: true

jobs:
  # ------------------------------------------------------------------
  # 静态门禁（pre-commit 钩子全集）
  # ------------------------------------------------------------------
  static-gates:
    name: 静态门禁 (pre-commit)
    runs-on: windows
    steps:
      - uses: actions/checkout@v4
        with:
          # 钩子要对比基线与历史（doc-links 等读工作区即可，但 gitlint/cubemx 需完整历史）
          fetch-depth: 0

      - name: 环境自检（Python / cppcheck / pre-commit）
        shell: powershell
        run: |
          # NOTE: keep every run: block pure ASCII. The runner writes this block
          # to a BOM-less .ps1 executed by Windows PowerShell 5.1, which decodes
          # it as GBK -- non-ASCII bytes there break string quoting.
          # --- pick a Python that actually has pre-commit -------------------
          # Discovery lives in scripts/ci_find_python.ps1 so that
          #   * both jobs share ONE implementation,
          #   * it can be run (and its failure list inspected) offline,
          #   * the well-known machine-wide install locations stay probed.
          # The previous inline 2-candidate probe is what killed every static-gate run
          # since 33a4aa4 -- see the file header.
          #
          # The script prints diagnostics with Write-Host and emits ONLY the
          # chosen path on the success stream, so capturing it is exact.
          # It also appends PYTHON=<path> to GITHUB_ENV (as ASCII) for later
          # steps, which is why $env:PYTHON works in the steps below.
          $py = & './scripts/ci_find_python.ps1' -NeedPreCommit -WriteEnv
          if ($LASTEXITCODE -ne 0) { exit $LASTEXITCODE }
          if (-not $py) {
            Write-Host "::error::ci_find_python.ps1 succeeded but returned no path"
            exit 2
          }
          $py = "$py".Trim()

          # --- cppcheck -----------------------------------------------------
          # Order: DTU_CPPCHECK (explicit; invalid = hard error, no fallback)
          # -> PATH -> the standard install directory.
          #
          # The directory fallback is NOT cosmetic: the runner service runs as
          # SYSTEM, whose PATH has no Cppcheck entry (a USER-scope PATH entry is
          # invisible to it), and no machine-level DTU_CPPCHECK is set on a
          # stock runner. Dropping this fallback in 33a4aa4 is what made the static-gate job die
          # on cppcheck as well, right after the Python probe had been fixed.
          $found = $null
          $envCpp = $env:DTU_CPPCHECK
          if ($envCpp) {
            if (-not (Test-Path $envCpp)) {
              Write-Host "::error::DTU_CPPCHECK is set but does not exist: $envCpp"
              Write-Host "::error::fix the variable (full path to cppcheck.exe), or unset it to use auto-discovery"
              exit 1
            }
            $found = $envCpp
            Write-Host "using cppcheck from DTU_CPPCHECK: $found"
          } else {
            $cmd = Get-Command cppcheck -ErrorAction SilentlyContinue
            if ($cmd) {
              $found = $cmd.Source
              Write-Host "found cppcheck on PATH: $found"
            } else {
              $pf   = $env:ProgramFiles
              $pf86 = ${env:ProgramFiles(x86)}
              if (-not $pf)   { $pf   = 'C:\Program Files' }
              if (-not $pf86) { $pf86 = 'C:\Program Files (x86)' }
              foreach ($cand in @(
                  (Join-Path $pf 'Cppcheck\cppcheck.exe'),
                  (Join-Path $pf86 'Cppcheck\cppcheck.exe'))) {
                if (Test-Path $cand) { $found = $cand; break }
              }
            }
          }
          if (-not $found) {
            Write-Host "::error::runner missing cppcheck (not on SYSTEM PATH, not in the standard install dir)"
            Write-Host "::error::set a machine-level DTU_CPPCHECK (see scripts/ci_runner_bootstrap.ps1 -SetEnv) or add its directory to the machine PATH, then re-run"
            exit 1
          }
          $cppDir = Split-Path -Parent $found
          $env:Path = "$env:Path;$cppDir"
          # ASCII on purpose: Out-File's PS 5.1 default is UTF-16LE, and other
          # steps append to this same file -- mixed encodings corrupt it.
          $cppDir | Out-File -FilePath $env:GITHUB_PATH -Append -Encoding ascii
          & $found --version 2>&1 | Out-Host

          Write-Host "runner environment check passed"

      - name: 安装 pre-commit 钩子到本仓库
        shell: powershell
        run: "& $env:PYTHON -s -m pre_commit install --install-hooks"

      - name: 提交信息门禁（gitlint，commit-msg stage）
        shell: powershell
        env:
          DTU_BASE_SHA: ${{ github.event.before }}
          DTU_PR_BASE_SHA: ${{ github.event.pull_request.base.sha }}
          DTU_HEAD_SHA: ${{ github.sha }}
        run: |
          # Pure ASCII only (see file header).
          #
          # WHY THIS STEP EXISTS: gitlint is a `commit-msg` stage hook, and
          # `pre-commit run --all-files` only runs the `pre-commit` stage -- so
          # the commit-message rule was enforced locally and NEVER here, while
          # the job still reported green: the reported hook count is always
          # (defined count - 1), so a silently missing hook is invisible.
          # Recount that difference whenever hooks are added or removed.
          # pre-commit has no notion of "the commits of this push", so the
          # script feeds each commit message to the hook one at a time.
          #
          # Range: PR -> base..head; push -> event.before..sha, falling back to
          # the newest commits when `before` is all-zero (new branch) or
          # unreachable (force push). Merge commits are skipped (git writes them).
          $base = $env:DTU_PR_BASE_SHA
          if (-not $base) { $base = $env:DTU_BASE_SHA }
          & './scripts/ci_gitlint_range.ps1' -BaseSha $base -HeadSha $env:DTU_HEAD_SHA `
              -MaxCommits 50 -PythonExe $env:PYTHON
          if ($LASTEXITCODE -ne 0) {
            Write-Host "::error::commit message gate failed (gitlint) -- see the per-commit output above"
            exit $LASTEXITCODE
          }

      - name: 决定跳过哪些钩子（Keil 依赖）
        id: skip
        shell: powershell
        run: |
          # mem-numbers / mem-budget fact source is the Keil build artifact .map
          # (gitignored). No .map => those hooks cannot run => skip them EXPLICITLY.
          #
          # 2026-10-25: two honesty fixes here.
          #  1) mem-budget used NOT to be listed, yet it self-skips inside the script
          #     when .map is missing (exit 0) -- so on a Keil-less runner it reported
          #     "Passed" while checking nothing. A gate that fakes green is worse than
          #     a gate that is visibly skipped: skip it here so the report says Skipped.
          #  2) "skipped" alone is still the blind spot, so the compensation is a
          #     real step, not only a warning: see the "size gate" step at the end of
          #     this job (scripts/check_size_gate.py --ci, no Keil needed: attestation
          #     parity + 92% re-check on the recorded numbers). Boundary and rationale
          #     live in that script docstring (single source of truth).
          $map = Get-ChildItem -Path 'MDK-ARM' -Recurse -Filter '*.map' -ErrorAction SilentlyContinue
          if ($map) {
            Write-Host "found .map: $($map[0].FullName) -- size hooks run normally"
            "value=" | Out-File -FilePath $env:GITHUB_OUTPUT -Append -Encoding ascii
            "sizegate=on" | Out-File -FilePath $env:GITHUB_OUTPUT -Append -Encoding ascii
            "> Volume gates (mem-numbers, mem-budget): RAN (.map present)" |
              Out-File -FilePath $env:GITHUB_STEP_SUMMARY -Append -Encoding utf8
          } else {
            Write-Host "::warning::no .map found (no Keil build) -- SKIPPING mem-numbers and mem-budget, so absolute Flash/RAM numbers are NOT recomputed here."
            Write-Host "::warning::that gap is no longer silent: the final step of this job runs scripts/check_size_gate.py --ci (forced path: attestation parity + 92% budget re-check). Locally: scripts/ci_local.py size step."
            "value=mem-numbers,mem-budget" | Out-File -FilePath $env:GITHUB_OUTPUT -Append -Encoding ascii
            "sizegate=off" | Out-File -FilePath $env:GITHUB_OUTPUT -Append -Encoding ascii
            "> :warning: Volume gates (mem-numbers, mem-budget): **NOT RUN** -- no `.map` (no Keil build); compensated by the size-gate step below." |
              Out-File -FilePath $env:GITHUB_STEP_SUMMARY -Append -Encoding utf8
          }

      - name: 运行静态门禁（--all-files）
        shell: powershell
        env:
          SKIP: ${{ steps.skip.outputs.value }}
        run: |
          # Pure ASCII only (see file header). Capture output to an artifact file
          # AND to the console (Tee-Object), so a failed run is debuggable from the
          # Gitea UI without inspecting runner disk.
          #
          # CAUTION: the runner injects $ErrorActionPreference='Stop'. With `2>&1 |`,
          # a native command's stderr becomes an ErrorRecord -> under 'Stop' that
          # would ABORT the pipeline. Relax the preference around the pipeline and
          # restore it afterwards (same pattern as the env-check step above).
          New-Item -ItemType Directory -Force -Path 'ci-artifacts' | Out-Null
          $log = 'ci-artifacts\static-pre-commit.log'
          if ($env:SKIP) { Write-Host "SKIP=$env:SKIP" }
          $saved = $ErrorActionPreference
          $ErrorActionPreference = 'Continue'
          & $env:PYTHON -s -m pre_commit run --all-files --show-diff-on-failure 2>&1 |
            Tee-Object -FilePath $log
          $rc = $LASTEXITCODE
          $ErrorActionPreference = $saved

          # Summarize hook results: count Passed / Failed / Skipped lines.
          $lines  = Get-Content $log -ErrorAction SilentlyContinue
          $passed = @($lines | Select-String -Pattern 'Passed$').Count
          $failed = @($lines | Select-String -Pattern 'Failed$').Count
          $skipd  = @($lines | Select-String -Pattern 'Skipped$').Count
          $summary = "static: pre-commit hooks -- passed=$passed failed=$failed skipped=$skipd (log: $log)"
          Write-Host "::notice::$summary"
          Add-Content -Path $env:GITHUB_STEP_SUMMARY -Value "### 静态门禁 (static gates)" -Encoding utf8
          Add-Content -Path $env:GITHUB_STEP_SUMMARY -Value $summary -Encoding utf8

          if ($rc -ne 0) {
            Write-Host "::error::static gates failed (see output above and $log)"
            exit $rc
          }

      - name: 归档静态门禁日志（供下载/排障）
        if: always()
        shell: powershell
        run: |
          # Result visibility: zero-dependency artifact archival. We do NOT use
          # actions/upload-artifact (inner networks may not fetch outer actions);
          # instead we keep the log on the runner AND surface its path + tail in
          # the step summary, so the UI is self-sufficient for triage.
          if (Test-Path 'ci-artifacts\static-pre-commit.log') {
            $size = (Get-Item 'ci-artifacts\static-pre-commit.log').Length
            Write-Host "archived: ci-artifacts/static-pre-commit.log ($size bytes)"
            Add-Content -Path $env:GITHUB_STEP_SUMMARY -Value "" -Encoding utf8
            Add-Content -Path $env:GITHUB_STEP_SUMMARY -Value "Archived log: ``ci-artifacts/static-pre-commit.log`` ($size bytes on runner)" -Encoding utf8
          }
          Write-Host "::notice::static-gate artifacts kept on runner at: ci-artifacts\static-pre-commit.log"

      # ------------------------------------------------------------
      # 强制体积门禁（2026-10-25）：不需要 Keil，也不需要 .map
      # 放在静态门禁作业**最后**且 if: always()——静态门禁失败时这条结论同样要看得到，
      # 而它自己失败会让整个作业变红（这正是"强制"的含义）。
      - name: 体积门禁（强制路径：同码凭证 + 92% 红线，无需 Keil）
        if: always()
        shell: powershell
        env:
          GATE_REF: ${{ github.ref }}
          GATE_EVENT: ${{ github.event_name }}
        run: |
          # Pure ASCII only (see file header).
          #
          # WHY THIS STEP EXISTS: mem-numbers / mem-budget read the Keil .map and
          # self-skip (exit 0) without it, so "not measured" used to look like
          # "passed" -- that is exactly the blind spot ("CI all green does not
          # mean the size budget held"). Merely declaring it did not close it.
          #
          # This step enforces a check that needs NO Keil and NO .map:
          #   * parity  -- scripts/size_attestation.json (a committed attestation
          #     that --stamp refuses to write unless the .map is present, newer
          #     than every source file in scope, and inside budget) must
          #     fingerprint-match THIS checked-out tree => this exact code was
          #     linked for real at least once;
          #   * budget  -- the region percentages that measurement recorded must
          #     stay within the same 92% line mem-budget uses.
          #
          # Enforcement point = trunk push, the only ref guaranteed to be the code
          # we ship. Task branches / WIP pull requests run --warn-only instead: the
          # code there is still moving, and blocking it would push every lane to
          # edit the same scripts/ ledger file at the same time.
          New-Item -ItemType Directory -Force -Path 'ci-artifacts' | Out-Null
          $log = 'ci-artifacts\size-gate.log'
          if (-not $env:PYTHON) {
            # The environment probe step already failed in that case, so the job is
            # red anyway; do not mask that with a second, unrelated error.
            Write-Host "::warning::PYTHON unresolved (env step failed) -- size gate cannot run"
            exit 0
          }
          $trunks = @('refs/heads/v2-on-ui', 'refs/heads/master', 'refs/heads/main')
          $enforce = ($env:GATE_EVENT -eq 'push') -and ($trunks -contains $env:GATE_REF)
          if ($enforce) {
            $mode = @()
            $label = 'ENFORCING (trunk push)'
          } else {
            $mode = @('--warn-only')
            $label = 'advisory (non-trunk event)'
          }
          $saved = $ErrorActionPreference
          $ErrorActionPreference = 'Continue'
          & $env:PYTHON -s scripts/check_size_gate.py --ci @mode 2>&1 |
            Tee-Object -FilePath $log
          $rc = $LASTEXITCODE
          $ErrorActionPreference = $saved

          Add-Content -Path $env:GITHUB_STEP_SUMMARY -Value "" -Encoding utf8
          Add-Content -Path $env:GITHUB_STEP_SUMMARY -Value "### Volume gate (forced path)" -Encoding utf8
          Add-Content -Path $env:GITHUB_STEP_SUMMARY -Value "size gate: rc=$rc mode=$label (attestation parity + 92% re-check; no Keil)" -Encoding utf8
          Write-Host "::notice::size gate: rc=$rc mode=$label (log: $log)"
          if ($rc -ne 0) {
            Write-Host "::error::volume gate FAILED: this tree has no matching real Keil measurement, or the measured regions exceed the 92% budget."
            Write-Host "::error::fix: run the Keil build locally (0 errors 0 warnings), then 'python scripts/ram_baseline.py --update', and commit scripts/size_attestation.json (scripts/ram_baseline.tsv is refreshed by the same command). Rationale/boundary: scripts/check_size_gate.py docstring."
            exit $rc
          }

  # ------------------------------------------------------------------
  # 主机侧纯逻辑单测（零硬件；缺 MSVC 则跳过）
  # ------------------------------------------------------------------
  host-unit-tests:
    name: 主机侧单测 (MSVC)
    runs-on: windows
    steps:
      - uses: actions/checkout@v4

      - name: 探测 MSVC（VS BuildTools / Community 等）
        id: msvc
        shell: powershell
        run: |
          # MSVC discovery per the DTU_* plan, kept in sync with
          # test/host/common/unit_test_harness.py:
          #   DTU_MSVC_CL (explicit x64 cl.exe; invalid = hard error)
          #     -> auto-probe standard VS roots derived from %ProgramFiles%
          #        / %ProgramFiles(x86)% (2019 / 2022 / 2026, all editions)
          $found = $false
          $envCl = $env:DTU_MSVC_CL
          if ($envCl) {
            if (-not (Test-Path $envCl)) {
              Write-Host "::error::DTU_MSVC_CL is set but does not exist: $envCl"
              exit 1
            }
            if ($envCl -notlike '*bin\Hostx64\x64\cl.exe') {
              Write-Host "::error::DTU_MSVC_CL must be the x64 Host compiler (path ending bin\Hostx64\x64\cl.exe): $envCl"
              exit 1
            }
            $found = $true
            Write-Host "using cl.exe from DTU_MSVC_CL: $envCl"
          } else {
            $pf   = ${env:ProgramFiles}
            $pf86 = ${env:ProgramFiles(x86)}
            if (-not $pf)   { $pf   = 'C:\Program Files' }
            if (-not $pf86) { $pf86 = 'C:\Program Files (x86)' }
            $roots = @(
              (Join-Path $pf86 'Microsoft Visual Studio\2019\BuildTools'),
              (Join-Path $pf86 'Microsoft Visual Studio\2019\Community'),
              (Join-Path $pf86 'Microsoft Visual Studio\2019\Professional'),
              (Join-Path $pf   'Microsoft Visual Studio\2022\BuildTools'),
              (Join-Path $pf   'Microsoft Visual Studio\2022\Community'),
              (Join-Path $pf   'Microsoft Visual Studio\2022\Professional'),
              (Join-Path $pf   'Microsoft Visual Studio\2022\Enterprise'),
              (Join-Path $pf   'Microsoft Visual Studio\2026\BuildTools'),
              (Join-Path $pf   'Microsoft Visual Studio\2026\Community'),
              (Join-Path $pf   'Microsoft Visual Studio\18\BuildTools'),
              (Join-Path $pf   'Microsoft Visual Studio\18\Community'),
              (Join-Path $pf   'Microsoft Visual Studio\18\Professional'),
              (Join-Path $pf   'Microsoft Visual Studio\18\Enterprise')
            )
            foreach ($r in $roots) {
              if (Test-Path $r) {
                $cl = Get-ChildItem -Path $r -Recurse -Filter 'cl.exe' -ErrorAction SilentlyContinue |
                      Where-Object { $_.FullName -like '*Hostx64\x64*' } | Select-Object -First 1
                if ($cl) { $found = $true; Write-Host "found cl.exe: $($cl.FullName)"; break }
              }
            }
          }
          if ($found) {
            "value=yes" | Out-File -FilePath $env:GITHUB_OUTPUT -Append -Encoding ascii
          } else {
            Write-Host "::warning::runner has no MSVC (VS C++ toolchain) -- skipping host-side unit tests. Install VS BuildTools and re-run."
            "value=no" | Out-File -FilePath $env:GITHUB_OUTPUT -Append -Encoding ascii
          }

      - name: 运行主机侧单测
        id: l05
        if: steps.msvc.outputs.value == 'yes'
        shell: powershell
        run: |
          # Resolve a working Python with the SAME shared probe as the static-gate job (no
          # -NeedPreCommit: these harnesses are stdlib-only). The old inline
          # probe here had the same 2-candidate blind spot as the static-gate job -- it only
          # survived by luck, because the stdlib tests also run on the msys64
          # python that happens to be on SYSTEM's PATH.
          $py = & './scripts/ci_find_python.ps1' -WriteEnv
          if ($LASTEXITCODE -ne 0) { exit $LASTEXITCODE }
          if (-not $py) {
            Write-Host "::error::ci_find_python.ps1 succeeded but returned no path"
            exit 2
          }
          $py = "$py".Trim()
          Write-Host "using python: $py"

          New-Item -ItemType Directory -Force -Path 'ci-artifacts' | Out-Null

          # Iterate test/host/*/run_unit_test.py (each module ships its own runner via common harness)
          $runners = Get-ChildItem -Path 'test/host' -Recurse -Filter 'run_unit_test.py' |
                     Sort-Object FullName
          if (-not $runners) {
            Write-Host "::warning::no test/host/**/run_unit_test.py found -- skipping"
            exit 0
          }
          $fail = 0
          $runnerCount = 0
          $sumPass = 0
          $sumTotal = 0
          # Relax preference around each `2>&1 | Tee-Object` pipeline (native stderr
          # becomes ErrorRecord -> 'Stop' would abort). See the static-gate steps for details.
          $savedPref = $ErrorActionPreference
          foreach ($r in $runners) {
            $runnerCount++
            $name = $r.Directory.Name
            $log = "ci-artifacts\host-unit-$name.log"
            Write-Host "================================"
            Write-Host "run: $($r.FullName)"
            Write-Host "================================"
            $ErrorActionPreference = 'Continue'
            & $py $r.FullName 2>&1 | Tee-Object -FilePath $log
            $rc = $LASTEXITCODE
            $ErrorActionPreference = $savedPref

            # Parse the module's own summary line, e.g.
            #   "=== System Clock Tests: 100/100 PASSED (failed=0) ==="
            $m = Select-String -Path $log -Pattern ': (\d+)/(\d+) PASSED \(failed=(\d+)\)' -ErrorAction SilentlyContinue |
                 Select-Object -Last 1
            if ($m) {
              $sumPass  += [int]$m.Matches[0].Groups[1].Value
              $sumTotal += [int]$m.Matches[0].Groups[2].Value
              Write-Host ("::notice::{0}: {1}" -f $name, $m.Matches[0].Value.Trim())
            } else {
              Write-Host "::warning::$name produced no '=== ... N/M PASSED ===' summary line"
            }
            if ($rc -ne 0) {
              Write-Host "::error::unit test failed: $($r.FullName) (exit $rc)"
              $fail = 1
            }
          }

          $agg = "host-unit: $runnerCount runner(s), $sumPass/$sumTotal assertions passed, fail=$fail"
          Write-Host "::notice::$agg"
          Add-Content -Path $env:GITHUB_STEP_SUMMARY -Value "### 主机侧纯逻辑单测 (host-unit)" -Encoding utf8
          Add-Content -Path $env:GITHUB_STEP_SUMMARY -Value $agg -Encoding utf8
          "count=$runnerCount" | Out-File -FilePath $env:GITHUB_OUTPUT -Append -Encoding ascii
          "agg=$agg" | Out-File -FilePath $env:GITHUB_OUTPUT -Append -Encoding ascii
          exit $fail

      - name: 归档主机侧单测日志（供下载/排障）
        if: always()
        shell: powershell
        run: |
          # Result visibility: same zero-dependency archival as the static-gate job.
          if (Test-Path 'ci-artifacts') {
            $logs = Get-ChildItem -Path 'ci-artifacts' -Filter '*.log' -ErrorAction SilentlyContinue
            foreach ($f in $logs) {
              Write-Host "archived: $($f.FullName) ($($f.Length) bytes)"
            }
            $names = ($logs | ForEach-Object { '``' + $_.Name + '``' }) -join ', '
            if ($names) {
              Add-Content -Path $env:GITHUB_STEP_SUMMARY -Value "" -Encoding utf8
              Add-Content -Path $env:GITHUB_STEP_SUMMARY -Value "Archived logs on runner: $names" -Encoding utf8
            }
          } else {
            Write-Host "no ci-artifacts directory (host-side unit tests skipped or failed early)"
          }

      - name: 主机侧单测跳过说明
        if: steps.msvc.outputs.value == 'no'
        shell: powershell
        run: |
          Write-Host "host-side unit tests skipped: runner has no MSVC."
          Write-Host "Local equivalent: & '.venv\Scripts\python.exe' scripts/ci_local.py"
          Add-Content -Path $env:GITHUB_STEP_SUMMARY -Value "### 主机侧纯逻辑单测 (host-unit)" -Encoding utf8
          Add-Content -Path $env:GITHUB_STEP_SUMMARY -Value ":warning: **NOT RUN** -- runner has no MSVC (VS C++ toolchain)." -Encoding utf8
          exit 0