Add the reusable quality-check workflows for C++ and C#

Task: MIL-007#4

Task: MIL-007#5

.gitea/workflows/quality-checks-cpp.yml

@@ -0,0 +1,71 @@
+name: Quality checks C++
+
+# Reusable workflow (ADR-0008). A repository calls it with
+#
+#   jobs:
+#     quality:
+#       uses: TirSystem/github-action/.gitea/workflows/quality-checks-cpp.yml@v1
+#
+# It checks the C and C++ files of the repository with clang-format and
+# clang-tidy at exact versions, changes no file and needs no secret. The
+# repository needs a .clang-format; a .clang-tidy and a compile database
+# (compile-commands-dir) are optional.
+on:
+  workflow_call:
+    inputs:
+      working-directory:
+        description: "Directory, relative to the repository root, whose files are checked"
+        type: string
+        default: "."
+      std:
+        description: "C++ standard for clang-tidy when no compile database is given, such as c++20"
+        type: string
+        default: "c++20"
+      compile-commands-dir:
+        description: "Directory with a compile_commands.json built by the caller before the call; empty uses the std input"
+        type: string
+        default: ""
+      clang-format-version:
+        description: "Exact version of the clang-format package"
+        type: string
+        default: "23.1.3"
+      clang-tidy-version:
+        description: "Exact version of the clang-tidy package"
+        type: string
+        default: "22.1.8"
+      tools-ref:
+        description: "Tag or branch of TirSystem/github-action whose tools/quality-checks-cpp.sh is run; pin it to the exact tag together with the workflow"
+        type: string
+        default: "v1"
+
+jobs:
+  quality-checks-cpp:
+    permissions:
+      contents: read
+    runs-on: ubuntu-latest
+    env:
+      WORKING_DIRECTORY: ${{ inputs.working-directory }}
+      STD: ${{ inputs.std }}
+      COMPILE_COMMANDS_DIR: ${{ inputs.compile-commands-dir }}
+      CLANG_FORMAT_VERSION: ${{ inputs.clang-format-version }}
+      CLANG_TIDY_VERSION: ${{ inputs.clang-tidy-version }}
+      QC_VENV: /tmp/quality-tools
+    steps:
+      - name: Check out the repository
+        uses: actions/checkout@v4
+
+      - name: Fetch the shared script
+        uses: actions/checkout@v4
+        with:
+          repository: TirSystem/github-action
+          ref: ${{ inputs.tools-ref }}
+          path: shared-scripts
+
+      - name: Validate the inputs
+        run: bash shared-scripts/tools/quality-checks-cpp.sh validate
+
+      - name: Install the tools
+        run: bash shared-scripts/tools/quality-checks-cpp.sh install
+
+      - name: Run the checks
+        run: bash shared-scripts/tools/quality-checks-cpp.sh run

.gitea/workflows/quality-checks-csharp.yml

@@ -0,0 +1,60 @@
+name: Quality checks C#
+
+# Reusable workflow (ADR-0008). A repository calls it with
+#
+#   jobs:
+#     quality:
+#       uses: TirSystem/github-action/.gitea/workflows/quality-checks-csharp.yml@v1
+#
+# It checks the C# solution or project of the repository with `dotnet format`
+# and `dotnet build` (warnings as errors) on an exact .NET SDK 10 or later,
+# changes no file and needs no secret. The package restore needs the network.
+on:
+  workflow_call:
+    inputs:
+      working-directory:
+        description: "Directory, relative to the repository root, whose files are checked"
+        type: string
+        default: "."
+      project:
+        description: "Solution or project file, relative to working-directory; empty uses the single .sln, .slnx or .csproj found"
+        type: string
+        default: ""
+      dotnet-sdk-version:
+        description: "Exact .NET SDK version, 10 or later (no channel, no range)"
+        type: string
+        default: "10.0.401"
+      tools-ref:
+        description: "Tag or branch of TirSystem/github-action whose tools/quality-checks-csharp.sh is run; pin it to the exact tag together with the workflow"
+        type: string
+        default: "v1"
+
+jobs:
+  quality-checks-csharp:
+    permissions:
+      contents: read
+    runs-on: ubuntu-latest
+    env:
+      WORKING_DIRECTORY: ${{ inputs.working-directory }}
+      PROJECT: ${{ inputs.project }}
+      DOTNET_SDK_VERSION: ${{ inputs.dotnet-sdk-version }}
+      DOTNET_ROOT: /tmp/dotnet
+    steps:
+      - name: Check out the repository
+        uses: actions/checkout@v4
+
+      - name: Fetch the shared script
+        uses: actions/checkout@v4
+        with:
+          repository: TirSystem/github-action
+          ref: ${{ inputs.tools-ref }}
+          path: shared-scripts
+
+      - name: Validate the inputs
+        run: bash shared-scripts/tools/quality-checks-csharp.sh validate
+
+      - name: Install the .NET SDK
+        run: bash shared-scripts/tools/quality-checks-csharp.sh install
+
+      - name: Run the checks
+        run: bash shared-scripts/tools/quality-checks-csharp.sh run

CHANGELOG.md

@@ -20,6 +20,18 @@ Each release lists its changes in these groups, in this order:
 
 ## [Unreleased]
 
+### Added
+
+- Reusable workflow `quality-checks-cpp.yml` (ADR-0008): `clang-format --dry-run
+  -Werror` and `clang-tidy` on the tracked C and C++ files, at exact versions
+  (inputs `clang-format-version`, `clang-tidy-version`), with the inputs
+  `working-directory`, `std`, `compile-commands-dir` and `tools-ref`. The
+  repository needs a `.clang-format`.
+- Reusable workflow `quality-checks-csharp.yml` (ADR-0008): `dotnet format
+  --verify-no-changes` and `dotnet build -warnaserror` on an exact .NET SDK 10
+  or later (input `dotnet-sdk-version`, default `10.0.401`), with the inputs
+  `working-directory`, `project` and `tools-ref`.
+
 ## [1.1.0] - 2026-10-11
 
 ### Added

README.md

@@ -17,17 +17,19 @@ A collection of reusable Gitea Actions workflows for DevOps professionals and so
 
 This repository is the central collection of reusable automation for TirSystem repositories. The primary repository lives at `git.tirsystem.com` (Gitea) and is push-mirrored to GitHub.
 
-It contains six workflows: metadata sync to the GitHub mirror, wiki publishing, shared quality checks, a release workflow, the publishing of accepted milestones and the repository's own validation. They are listed with their purpose and a diagram under [Workflows](#-workflows).
+It contains eight workflows: metadata sync to the GitHub mirror, wiki publishing, shared quality checks for Python and shell, for C and C++ and for C#, a release workflow, the publishing of accepted milestones and the repository's own validation. They are listed with their purpose and a diagram under [Workflows](#-workflows).
 
 ## 🔧 Workflows
 
-Six workflows live in this repository. A **scoped** workflow is delivered by the instance to every repository of the TirSystem organizations and needs nothing in the repository; a **reusable** workflow is called by a repository with `uses:`; the others run only here. The diagrams are PlantUML source.
+Eight workflows live in this repository. A **scoped** workflow is delivered by the instance to every repository of the TirSystem organizations and needs nothing in the repository; a **reusable** workflow is called by a repository with `uses:`; the others run only here. The diagrams are PlantUML source.
 
 | Workflow | File | Kind | Starts on | Purpose |
 | --- | --- | --- | --- | --- |
 | Sync GitHub mirror metadata | [`sync-github-metadata.yml`](.gitea/scoped_workflows/sync-github-metadata.yml) | Scoped | push to `main`, manual, daily 03:17 UTC | Copies the description and topics of a Gitea repository to its GitHub push mirror |
 | Publish wiki | [`publish-wiki.yml`](.gitea/scoped_workflows/publish-wiki.yml) | Scoped, opt-in with `wiki/.publish` | push to `main` that changes `wiki/**`, manual | Publishes the pages in `wiki/` to the repository wiki |
 | Quality checks | [`quality-checks.yml`](.gitea/workflows/quality-checks.yml) | Reusable (`workflow_call`) | a call from another repository | Runs ruff, mypy, shellcheck and shfmt on the tracked files and changes nothing |
+| Quality checks C++ | [`quality-checks-cpp.yml`](.gitea/workflows/quality-checks-cpp.yml) | Reusable (`workflow_call`) | a call from another repository | Runs clang-format and clang-tidy at exact versions on the tracked C and C++ files and changes nothing |
+| Quality checks C# | [`quality-checks-csharp.yml`](.gitea/workflows/quality-checks-csharp.yml) | Reusable (`workflow_call`) | a call from another repository | Runs `dotnet format` and `dotnet build` on an exact .NET SDK 10 or later and changes nothing |
 | Release | [`release.yml`](.gitea/workflows/release.yml) | This repository only | manual | Creates the version tag, the release page and the major tag after the checks |
 | Publish accepted milestones | [`sync-milestones.yml`](.gitea/workflows/sync-milestones.yml) | This repository only | push to `main` that changes `docs/milestones/**` or `docs/sqa/reviews/**`, manual (dry run by default) | Creates or updates the Gitea milestone and issues of every milestone that is Accepted with a Go review |
 | Validate workflows | [`validate-workflows.yml`](.gitea/workflows/validate-workflows.yml) | This repository only | pull request, push to `main`, manual | Parses every workflow and runs the offline tests |
@@ -188,6 +190,96 @@ deactivate Workflow
 @enduml
 ```
 
+### 🧱 Quality checks C++
+
+A reusable workflow for C and C++, called with `uses: TirSystem/github-action/.gitea/workflows/quality-checks-cpp.yml@v1` (ADR-0008). The repository needs a `.clang-format`; a `.clang-tidy` and a compile database are optional.
+
+#### 🔀 Workflow
+
+```plantuml
+@startuml
+title Shared quality checks for C and C++ (reusable workflow)
+
+autonumber
+
+actor "Calling repository\nuses: ...quality-checks-cpp.yml@v1" as Caller
+participant "Gitea Actions\nquality-checks-cpp" as Workflow
+participant "PyPI" as PyPI
+
+Caller -> Workflow: workflow_call with working-directory, std,\ncompile-commands-dir and tool versions
+activate Workflow
+
+Workflow -> Workflow: Check out the caller and the shared script
+Workflow -> Workflow: Validate the inputs
+alt an input is invalid or a version is not exact
+  Workflow --> Caller: Fail with [configuration]
+end
+
+Workflow -> PyPI: Install clang-format and clang-tidy at the exact versions
+PyPI --> Workflow: Tools installed
+
+alt no C or C++ file is tracked
+  Workflow --> Caller: Notice: nothing was checked, pass
+else no .clang-format, or compile-commands-dir\nwithout compile_commands.json
+  Workflow --> Caller: Fail with [configuration]
+else
+  Workflow -> Workflow: clang-format --dry-run -Werror on all files
+  Workflow -> Workflow: clang-tidy on the C++ files (-std=std)\nand on the C files (or with the compile database)
+  alt any tool failed
+    Workflow --> Caller: Fail with tool, file and line in the log
+  else
+    Workflow --> Caller: All selected checks passed
+  end
+end
+deactivate Workflow
+@enduml
+```
+
+### 🟣 Quality checks C#
+
+A reusable workflow for C#, called with `uses: TirSystem/github-action/.gitea/workflows/quality-checks-csharp.yml@v1` (ADR-0008). It installs the exact .NET SDK given by `dotnet-sdk-version` (10 or later) and needs the network for the package restore.
+
+#### 🔀 Workflow
+
+```plantuml
+@startuml
+title Shared quality checks for C# (reusable workflow)
+
+autonumber
+
+actor "Calling repository\nuses: ...quality-checks-csharp.yml@v1" as Caller
+participant "Gitea Actions\nquality-checks-csharp" as Workflow
+participant "dot.net\n(dotnet-install.sh)" as DotNet
+
+Caller -> Workflow: workflow_call with working-directory,\nproject and dotnet-sdk-version
+activate Workflow
+
+Workflow -> Workflow: Check out the caller and the shared script
+Workflow -> Workflow: Validate the inputs
+alt an input is invalid or the SDK is not an exact\nstable version 10 or later
+  Workflow --> Caller: Fail with [configuration]
+end
+
+Workflow -> DotNet: Install the exact .NET SDK version
+DotNet --> Workflow: SDK installed
+
+alt no C# file is tracked
+  Workflow --> Caller: Notice: nothing was checked, pass
+else no solution or project, or several without the project input
+  Workflow --> Caller: Fail with [configuration] that names them
+else
+  Workflow -> Workflow: dotnet format --verify-no-changes
+  Workflow -> Workflow: dotnet build -warnaserror\n(package restore needs the network)
+  alt any tool failed
+    Workflow --> Caller: Fail with tool, file and line in the log
+  else
+    Workflow --> Caller: All selected checks passed
+  end
+end
+deactivate Workflow
+@enduml
+```
+
 ### 🏷️ Release
 
 Started by hand by a maintainer; with `dry_run` `true` (the default) it only checks (see the [release process](guides/release-process.md)).

tests/test_quality_workflows_cpp_csharp.py

@@ -0,0 +1,634 @@
+"""Offline tests for the reusable C++ and C# quality-check workflows (ADR-0008).
+
+The shell steps run with stub tools in a throwaway git repository, so no
+network, no clang and no .NET SDK are needed.
+"""
+
+import os
+import shutil
+import subprocess
+from pathlib import Path
+from typing import Any
+
+import pytest
+import yaml
+
+from workflow_source import REPO_ROOT
+
+CPP_WORKFLOW = REPO_ROOT / ".gitea" / "workflows" / "quality-checks-cpp.yml"
+CSHARP_WORKFLOW = REPO_ROOT / ".gitea" / "workflows" / "quality-checks-csharp.yml"
+CPP_SCRIPT = REPO_ROOT / "tools" / "quality-checks-cpp.sh"
+CSHARP_SCRIPT = REPO_ROOT / "tools" / "quality-checks-csharp.sh"
+BASH = shutil.which("bash")
+
+pytestmark = pytest.mark.skipif(BASH is None, reason="bash is needed to run the workflow steps")
+
+# A script run: the finished process and the tool calls the stubs logged.
+Run = tuple[subprocess.CompletedProcess[str], list[str]]
+
+
+def load(path: Path) -> dict[str, Any]:  # parsed YAML has no fixed shape
+    return yaml.safe_load(path.read_text(encoding="utf-8"))
+
+
+def inputs_of(path: Path) -> dict[str, Any]:
+    return load(path)[True]["workflow_call"]["inputs"]  # PyYAML reads `on` as True
+
+
+@pytest.mark.parametrize(
+    "workflow, script, job",
+    [
+        (CPP_WORKFLOW, "quality-checks-cpp.sh", "quality-checks-cpp"),
+        (CSHARP_WORKFLOW, "quality-checks-csharp.sh", "quality-checks-csharp"),
+    ],
+    ids=["cpp", "csharp"],
+)
+class TestDefinition:
+    def test_has_least_privilege_and_needs_no_secret(self, workflow: Path, script: str, job: str) -> None:
+        document = load(workflow)
+        assert document["jobs"][job]["permissions"] == {"contents": "read"}
+        assert "secrets" not in workflow.read_text(encoding="utf-8").replace("needs no secret", "")
+
+    def test_embeds_no_script_and_runs_the_file_in_three_steps(
+        self,
+        workflow: Path,
+        script: str,
+        job: str,
+    ) -> None:
+        steps = load(workflow)["jobs"][job]["steps"]
+        commands = [step["run"] for step in steps if "run" in step]
+        assert commands == [f"bash shared-scripts/tools/{script} {c}" for c in ("validate", "install", "run")]
+
+    def test_fetches_the_script_at_the_tools_ref_input(self, workflow: Path, script: str, job: str) -> None:
+        steps = load(workflow)["jobs"][job]["steps"]
+        fetch = next(step for step in steps if step.get("name") == "Fetch the shared script")
+        assert fetch["with"] == {
+            "repository": "TirSystem/github-action",
+            "ref": "${{ inputs.tools-ref }}",
+            "path": "shared-scripts",
+        }
+        assert inputs_of(workflow)["tools-ref"]["default"] == "v1"
+
+    def test_inputs_reach_the_script_only_through_the_environment(
+        self,
+        workflow: Path,
+        script: str,
+        job: str,
+    ) -> None:
+        for step in load(workflow)["jobs"][job]["steps"]:
+            assert "${{" not in step.get("run", "")
+
+    def test_script_is_a_file_that_parses(self, workflow: Path, script: str, job: str) -> None:
+        result = subprocess.run(
+            [BASH, "-n", str(REPO_ROOT / "tools" / script)], text=True, capture_output=True
+        )
+        assert result.returncode == 0, result.stderr
+
+    def test_unknown_command_is_refused(self, workflow: Path, script: str, job: str) -> None:
+        result = subprocess.run(
+            [BASH, str(REPO_ROOT / "tools" / script), "bogus"], text=True, capture_output=True
+        )
+        assert result.returncode == 2
+
+
+def test_cpp_inputs_and_exact_defaults() -> None:
+    inputs = inputs_of(CPP_WORKFLOW)
+    assert set(inputs) == {
+        "working-directory",
+        "std",
+        "compile-commands-dir",
+        "clang-format-version",
+        "clang-tidy-version",
+        "tools-ref",
+    }
+    assert inputs["std"]["default"] == "c++20"
+    assert inputs["compile-commands-dir"]["default"] == ""
+    assert inputs["clang-format-version"]["default"] == "23.1.3"
+    assert inputs["clang-tidy-version"]["default"] == "22.1.8"
+
+
+def test_csharp_inputs_and_exact_sdk_default() -> None:
+    inputs = inputs_of(CSHARP_WORKFLOW)
+    assert set(inputs) == {"working-directory", "project", "dotnet-sdk-version", "tools-ref"}
+    assert inputs["dotnet-sdk-version"]["default"] == "10.0.401"
+
+
+def test_cpp_script_and_workflow_do_not_mention_cppcheck() -> None:
+    for path in (CPP_SCRIPT, CPP_WORKFLOW):
+        assert "cppcheck" not in path.read_text(encoding="utf-8").lower(), path.name
+
+
+# ----------------------------------------------------------------- helpers
+def make_repo(tmp_path: Path) -> Path:
+    root = tmp_path / "repo"
+    root.mkdir()
+    subprocess.run(["git", "init", "-q"], cwd=root, check=True)
+    return root
+
+
+def add_files(root: Path, *relative: str) -> None:
+    for name in relative:
+        path = root / name
+        path.parent.mkdir(parents=True, exist_ok=True)
+        path.write_text("x\n", encoding="utf-8", newline="\n")
+    subprocess.run(["git", "add", "-A"], cwd=root, check=True)
+
+
+def stub(directory: Path, name: str) -> Path:
+    path = directory / name
+    path.write_text(
+        "#!/usr/bin/env bash\n"
+        'name="$(basename "$0")"\n'
+        '[ "$name" = dotnet ] && name="dotnet $1"\n'
+        'echo "$name :: $*" >> "$STUB_LOG"\n'
+        'case ",${STUB_FAIL}," in\n'
+        '  *",$name,"*) echo "src/a.cpp:3:1: stub finding from $name"; exit 1 ;;\n'
+        "esac\n"
+        "exit 0\n",
+        encoding="utf-8",
+        newline="\n",
+    )
+    path.chmod(0o755)
+    return path
+
+
+def run_script(script: Path, command: str, cwd: Path, tmp_path: Path, **env: str) -> Run:
+    log = tmp_path / "tools.log"
+    environment = dict(os.environ)
+    environment.update({"STUB_LOG": log.as_posix(), "STUB_FAIL": ""})
+    environment.update(env)
+    result = subprocess.run(
+        [BASH, str(script), command], cwd=cwd, env=environment, text=True, capture_output=True
+    )
+    calls = log.read_text(encoding="utf-8").splitlines() if log.exists() else []
+    return result, calls
+
+
+# --------------------------------------------------------------------- C++
+@pytest.fixture
+def cpp_bin(tmp_path: Path) -> Path:
+    directory = tmp_path / "bin"
+    directory.mkdir()
+    for tool in ("clang-format", "clang-tidy"):
+        stub(directory, tool)
+    return directory
+
+
+def cpp_env(cpp_bin: Path, **extra: str) -> dict[str, str]:
+    values = {
+        "WORKING_DIRECTORY": ".",
+        "STD": "c++20",
+        "COMPILE_COMMANDS_DIR": "",
+        "CLANG_FORMAT_VERSION": "23.1.3",
+        "CLANG_TIDY_VERSION": "22.1.8",
+        "QC_VENV": "/nonexistent",
+        "QC_BIN": cpp_bin.as_posix(),
+    }
+    values.update(extra)
+    return values
+
+
+class TestCppValidate:
+    def run(self, tmp_path: Path, cpp_bin: Path, **extra: str) -> Run:
+        return run_script(CPP_SCRIPT, "validate", tmp_path, tmp_path, **cpp_env(cpp_bin, **extra))
+
+    def test_accepts_the_defaults(self, tmp_path: Path, cpp_bin: Path) -> None:
+        result, _ = self.run(tmp_path, cpp_bin)
+        assert result.returncode == 0, result.stdout
+
+    @pytest.mark.parametrize("std", ["c++17", "c++23", "gnu++20"])
+    def test_accepts_a_cpp_standard(self, tmp_path: Path, cpp_bin: Path, std: str) -> None:
+        assert self.run(tmp_path, cpp_bin, STD=std)[0].returncode == 0
+
+    @pytest.mark.parametrize("std", ["", "c17", "c++", "latest", "c++20; rm"])
+    def test_rejects_a_value_that_is_not_a_cpp_standard(
+        self,
+        tmp_path: Path,
+        cpp_bin: Path,
+        std: str,
+    ) -> None:
+        result, _ = self.run(tmp_path, cpp_bin, STD=std)
+        assert result.returncode == 1 and "[configuration]" in result.stdout
+
+    @pytest.mark.parametrize("directory", ["/etc", "..", "../x", "a/../..", ""])
+    def test_rejects_a_working_directory_outside_the_repository(
+        self,
+        tmp_path: Path,
+        cpp_bin: Path,
+        directory: str,
+    ) -> None:
+        result, _ = self.run(tmp_path, cpp_bin, WORKING_DIRECTORY=directory)
+        assert result.returncode == 1 and "working-directory" in result.stdout
+
+    @pytest.mark.parametrize("directory", ["/tmp/build", "../build"])
+    def test_rejects_a_compile_commands_dir_outside_the_repository(
+        self,
+        tmp_path: Path,
+        cpp_bin: Path,
+        directory: str,
+    ) -> None:
+        result, _ = self.run(tmp_path, cpp_bin, COMPILE_COMMANDS_DIR=directory)
+        assert result.returncode == 1 and "compile-commands-dir" in result.stdout
+
+    @pytest.mark.parametrize("name", ["CLANG_FORMAT_VERSION", "CLANG_TIDY_VERSION"])
+    @pytest.mark.parametrize("version", ["", "latest", "23", ">=23", "23.1.3 --pre"])
+    def test_rejects_a_version_that_is_not_exact(
+        self,
+        tmp_path: Path,
+        cpp_bin: Path,
+        name: str,
+        version: str,
+    ) -> None:
+        result, _ = self.run(tmp_path, cpp_bin, **{name: version})
+        assert result.returncode == 1 and "exact version" in result.stdout
+
+
+class TestCppRun:
+    @pytest.fixture
+    def repo(self, tmp_path: Path) -> Path:
+        root = make_repo(tmp_path)
+        add_files(root, ".clang-format")
+        return root
+
+    def run(self, repo: Path, tmp_path: Path, cpp_bin: Path, **extra: str) -> Run:
+        return run_script(CPP_SCRIPT, "run", repo, tmp_path, **cpp_env(cpp_bin, **extra))
+
+    def test_runs_clang_format_once_and_clang_tidy_per_language(
+        self,
+        repo: Path,
+        tmp_path: Path,
+        cpp_bin: Path,
+    ) -> None:
+        add_files(repo, "src/a.cpp", "src/a.hpp", "lib/c.c")
+        result, calls = self.run(repo, tmp_path, cpp_bin)
+
+        assert result.returncode == 0, result.stdout + result.stderr
+        assert [c.split(" :: ")[0] for c in calls] == ["clang-format", "clang-tidy", "clang-tidy"]
+        assert "--dry-run -Werror" in calls[0]
+        assert "src/a.cpp" in calls[0] and "lib/c.c" in calls[0]
+        assert "-- -std=c++20" in calls[1] and "lib/c.c" not in calls[1]
+        assert "-- -std=c17" in calls[2] and "lib/c.c" in calls[2]
+        assert "All selected checks passed." in result.stdout
+
+    def test_the_std_input_reaches_clang_tidy(self, repo: Path, tmp_path: Path, cpp_bin: Path) -> None:
+        add_files(repo, "a.cpp")
+        _, calls = self.run(repo, tmp_path, cpp_bin, STD="c++17")
+        assert "-- -std=c++17" in calls[1]
+
+    def test_a_compile_database_is_used_instead_of_a_standard(
+        self,
+        repo: Path,
+        tmp_path: Path,
+        cpp_bin: Path,
+    ) -> None:
+        add_files(repo, "a.cpp", "build/compile_commands.json")
+        result, calls = self.run(repo, tmp_path, cpp_bin, COMPILE_COMMANDS_DIR="build")
+        assert result.returncode == 0, result.stdout
+        assert len(calls) == 2
+        assert "-p build" in calls[1] and "-std=" not in calls[1]
+
+    def test_a_missing_compile_database_is_a_configuration_error(
+        self,
+        repo: Path,
+        tmp_path: Path,
+        cpp_bin: Path,
+    ) -> None:
+        add_files(repo, "a.cpp")
+        result, calls = self.run(repo, tmp_path, cpp_bin, COMPILE_COMMANDS_DIR="build")
+        assert result.returncode == 1 and "compile_commands.json" in result.stdout
+        assert calls == []
+
+    def test_a_missing_clang_format_file_is_a_configuration_error(
+        self,
+        tmp_path: Path,
+        cpp_bin: Path,
+    ) -> None:
+        repo = make_repo(tmp_path)
+        add_files(repo, "a.cpp")
+        result, calls = self.run(repo, tmp_path, cpp_bin)
+        assert result.returncode == 1
+        assert "[configuration]" in result.stdout and ".clang-format" in result.stdout
+        assert calls == []
+
+    def test_a_clang_format_file_above_the_working_directory_is_found(
+        self,
+        repo: Path,
+        tmp_path: Path,
+        cpp_bin: Path,
+    ) -> None:
+        add_files(repo, "service/a.cpp")
+        result, _ = run_script(
+            CPP_SCRIPT,
+            "run",
+            repo,
+            tmp_path,
+            **cpp_env(cpp_bin, WORKING_DIRECTORY="service"),
+        )
+        assert result.returncode == 0, result.stdout
+
+    def test_a_failing_tool_fails_the_job_and_the_other_still_runs(
+        self,
+        repo: Path,
+        tmp_path: Path,
+        cpp_bin: Path,
+    ) -> None:
+        add_files(repo, "src/a.cpp")
+        result, calls = self.run(repo, tmp_path, cpp_bin, STUB_FAIL="clang-format")
+        assert result.returncode == 1
+        assert len(calls) == 2, "clang-tidy runs after clang-format failed"
+        assert "::group::clang-format" in result.stdout
+        assert "src/a.cpp:3:1: stub finding from clang-format" in result.stdout
+        assert "FAIL clang-format" in result.stdout and "PASS clang-tidy (C++)" in result.stdout
+        assert "Quality checks failed: clang-format" in result.stdout
+
+    def test_a_repository_without_c_or_cpp_files_passes_with_a_notice(
+        self,
+        tmp_path: Path,
+        cpp_bin: Path,
+    ) -> None:
+        repo = make_repo(tmp_path)
+        add_files(repo, "README.md")
+        result, calls = self.run(repo, tmp_path, cpp_bin)
+        assert result.returncode == 0 and calls == []
+        assert "No C or C++ files" in result.stdout
+
+    def test_only_tracked_files_under_the_working_directory_are_checked(
+        self,
+        repo: Path,
+        tmp_path: Path,
+        cpp_bin: Path,
+    ) -> None:
+        add_files(repo, "top.cpp", "service/api.cpp")
+        (repo / "service" / "untracked.cpp").write_text("x\n", encoding="utf-8")
+        _, calls = self.run(repo, tmp_path, cpp_bin, WORKING_DIRECTORY="service")
+        text = "\n".join(calls)
+        assert "api.cpp" in text and "top.cpp" not in text and "untracked" not in text
+
+    def test_no_file_is_changed(self, repo: Path, tmp_path: Path, cpp_bin: Path) -> None:
+        add_files(repo, "a.cpp")
+
+        def snapshot() -> dict[str, bytes]:
+            return {p.name: p.read_bytes() for p in repo.iterdir() if p.is_file()}
+
+        before = snapshot()
+        self.run(repo, tmp_path, cpp_bin, STUB_FAIL="clang-tidy (C++)")
+        assert snapshot() == before
+
+    def test_a_missing_working_directory_is_a_configuration_error(
+        self,
+        repo: Path,
+        tmp_path: Path,
+        cpp_bin: Path,
+    ) -> None:
+        result, _ = self.run(repo, tmp_path, cpp_bin, WORKING_DIRECTORY="nope")
+        assert result.returncode == 1 and "[configuration]" in result.stdout
+
+
+def test_cpp_install_pins_both_tools_to_the_exact_versions(tmp_path: Path) -> None:
+    """`install` creates the venv and installs `==` versions; checked with a fake pip."""
+    venv = tmp_path / "venv"
+    fake_python = tmp_path / "bin"
+    fake_python.mkdir()
+    log = tmp_path / "pip.log"
+    python3 = fake_python / "python3"
+    python3.write_text(
+        "#!/usr/bin/env bash\n"
+        'mkdir -p "$3/bin"\n'
+        "printf '#!/usr/bin/env bash\\necho \"$*\" >> \"%s\"\\n' > \"$3/bin/pip\"\n" % log.as_posix()
+        + 'chmod +x "$3/bin/pip"\n',
+        encoding="utf-8",
+        newline="\n",
+    )
+    python3.chmod(0o755)
+    environment = dict(os.environ)
+    environment["PATH"] = f"{fake_python.as_posix()}:{environment['PATH']}"
+    environment.update(
+        {
+            "QC_VENV": venv.as_posix(),
+            "CLANG_FORMAT_VERSION": "23.1.3",
+            "CLANG_TIDY_VERSION": "22.1.8",
+        }
+    )
+    result = subprocess.run(
+        [BASH, str(CPP_SCRIPT), "install"], env=environment, text=True, capture_output=True
+    )
+    assert result.returncode == 0, result.stdout + result.stderr
+    installed = log.read_text(encoding="utf-8")
+    assert "clang-format==23.1.3" in installed
+    assert "clang-tidy==22.1.8" in installed
+
+
+# --------------------------------------------------------------------- C#
+@pytest.fixture
+def dotnet_stub(tmp_path: Path) -> Path:
+    directory = tmp_path / "dotnet-bin"
+    directory.mkdir()
+    return stub(directory, "dotnet")
+
+
+def csharp_env(dotnet_stub: Path, tmp_path: Path, **extra: str) -> dict[str, str]:
+    values = {
+        "WORKING_DIRECTORY": ".",
+        "PROJECT": "",
+        "DOTNET_SDK_VERSION": "10.0.401",
+        "DOTNET_ROOT": (tmp_path / "dotnet-root").as_posix(),
+        "QC_DOTNET": dotnet_stub.as_posix(),
+    }
+    values.update(extra)
+    return values
+
+
+class TestCsharpValidate:
+    def run(self, tmp_path: Path, dotnet_stub: Path, **extra: str) -> Run:
+        return run_script(
+            CSHARP_SCRIPT, "validate", tmp_path, tmp_path, **csharp_env(dotnet_stub, tmp_path, **extra)
+        )
+
+    @pytest.mark.parametrize("version", ["10.0.401", "10.0.100", "11.0.100", "100.1.2"])
+    def test_accepts_an_exact_sdk_of_version_10_or_later(
+        self,
+        tmp_path: Path,
+        dotnet_stub: Path,
+        version: str,
+    ) -> None:
+        assert self.run(tmp_path, dotnet_stub, DOTNET_SDK_VERSION=version)[0].returncode == 0
+
+    @pytest.mark.parametrize(
+        "version",
+        ["", "8.0.425", "9.0.100", "10.0", "10", "10.0.x", "latest", "10.0.401-rc.1", "10.0.401 --verbose"],
+    )
+    def test_rejects_an_old_or_inexact_sdk(self, tmp_path: Path, dotnet_stub: Path, version: str) -> None:
+        result, _ = self.run(tmp_path, dotnet_stub, DOTNET_SDK_VERSION=version)
+        assert result.returncode == 1
+        assert "[configuration]" in result.stdout and "dotnet-sdk-version" in result.stdout
+
+    @pytest.mark.parametrize("directory", ["/etc", "..", "../x", ""])
+    def test_rejects_a_working_directory_outside_the_repository(
+        self,
+        tmp_path: Path,
+        dotnet_stub: Path,
+        directory: str,
+    ) -> None:
+        result, _ = self.run(tmp_path, dotnet_stub, WORKING_DIRECTORY=directory)
+        assert result.returncode == 1 and "working-directory" in result.stdout
+
+    @pytest.mark.parametrize("project", ["/etc/x.sln", "../x.sln"])
+    def test_rejects_a_project_outside_the_working_directory(
+        self,
+        tmp_path: Path,
+        dotnet_stub: Path,
+        project: str,
+    ) -> None:
+        result, _ = self.run(tmp_path, dotnet_stub, PROJECT=project)
+        assert result.returncode == 1 and "project" in result.stdout
+
+
+class TestCsharpInstall:
+    def test_installs_the_exact_version_with_the_official_script(
+        self,
+        tmp_path: Path,
+        dotnet_stub: Path,
+    ) -> None:
+        root = tmp_path / "dotnet-root"
+        installer = tmp_path / "dotnet-install.sh"
+        installer.write_text(
+            "#!/usr/bin/env bash\n"
+            'echo "$*" >> "$STUB_LOG"\n'
+            'dir=""\n'
+            'while [ "$#" -gt 0 ]; do [ "$1" = --install-dir ] && dir="$2"; shift; done\n'
+            'mkdir -p "$dir"\n'
+            "printf '#!/usr/bin/env bash\\necho 10.0.401\\n' > \"$dir/dotnet\"\n"
+            'chmod +x "$dir/dotnet"\n',
+            encoding="utf-8",
+            newline="\n",
+        )
+        result, calls = run_script(
+            CSHARP_SCRIPT,
+            "install",
+            tmp_path,
+            tmp_path,
+            **csharp_env(dotnet_stub, tmp_path, QC_DOTNET_INSTALL_SCRIPT=installer.as_posix()),
+        )
+        assert result.returncode == 0, result.stdout + result.stderr
+        assert calls and "--version 10.0.401" in calls[0]
+        assert f"--install-dir {root.as_posix()}" in calls[0]
+        assert "10.0.401" in result.stdout
+
+
+class TestCsharpRun:
+    @pytest.fixture
+    def repo(self, tmp_path: Path) -> Path:
+        return make_repo(tmp_path)
+
+    def run(self, repo: Path, tmp_path: Path, dotnet_stub: Path, **extra: str) -> Run:
+        return run_script(
+            CSHARP_SCRIPT, "run", repo, tmp_path, **csharp_env(dotnet_stub, tmp_path, **extra)
+        )
+
+    def test_runs_format_and_build_on_the_single_solution(
+        self,
+        repo: Path,
+        tmp_path: Path,
+        dotnet_stub: Path,
+    ) -> None:
+        add_files(repo, "App.sln", "src/App.csproj", "src/Program.cs")
+        result, calls = self.run(repo, tmp_path, dotnet_stub)
+
+        assert result.returncode == 0, result.stdout + result.stderr
+        assert [c.split(" :: ")[0] for c in calls] == ["dotnet format", "dotnet build"]
+        assert "App.sln" in calls[0] and "--verify-no-changes" in calls[0]
+        assert "App.sln" in calls[1] and "-warnaserror" in calls[1]
+        assert "All selected checks passed." in result.stdout
+
+    def test_uses_the_single_project_when_there_is_no_solution(
+        self,
+        repo: Path,
+        tmp_path: Path,
+        dotnet_stub: Path,
+    ) -> None:
+        add_files(repo, "src/App.csproj", "src/Program.cs")
+        _, calls = self.run(repo, tmp_path, dotnet_stub)
+        assert "src/App.csproj" in calls[0]
+
+    def test_several_projects_without_a_solution_need_the_project_input(
+        self,
+        repo: Path,
+        tmp_path: Path,
+        dotnet_stub: Path,
+    ) -> None:
+        add_files(repo, "a/A.csproj", "b/B.csproj", "a/P.cs")
+        result, calls = self.run(repo, tmp_path, dotnet_stub)
+        assert result.returncode == 1 and calls == []
+        assert "[configuration]" in result.stdout
+        assert "a/A.csproj" in result.stdout and "b/B.csproj" in result.stdout
+
+    def test_the_project_input_picks_one(self, repo: Path, tmp_path: Path, dotnet_stub: Path) -> None:
+        add_files(repo, "a/A.csproj", "b/B.csproj", "a/P.cs")
+        result, calls = self.run(repo, tmp_path, dotnet_stub, PROJECT="b/B.csproj")
+        assert result.returncode == 0 and "b/B.csproj" in calls[0]
+
+    def test_a_missing_project_file_is_a_configuration_error(
+        self,
+        repo: Path,
+        tmp_path: Path,
+        dotnet_stub: Path,
+    ) -> None:
+        add_files(repo, "a/P.cs")
+        result, calls = self.run(repo, tmp_path, dotnet_stub, PROJECT="nope.csproj")
+        assert result.returncode == 1 and "does not exist" in result.stdout and calls == []
+
+    def test_csharp_files_without_a_project_are_a_configuration_error(
+        self,
+        repo: Path,
+        tmp_path: Path,
+        dotnet_stub: Path,
+    ) -> None:
+        add_files(repo, "Program.cs")
+        result, calls = self.run(repo, tmp_path, dotnet_stub)
+        assert result.returncode == 1 and calls == []
+        assert "[configuration]" in result.stdout and "no solution or project" in result.stdout
+
+    def test_a_repository_without_csharp_files_passes_with_a_notice(
+        self,
+        repo: Path,
+        tmp_path: Path,
+        dotnet_stub: Path,
+    ) -> None:
+        add_files(repo, "README.md")
+        result, calls = self.run(repo, tmp_path, dotnet_stub)
+        assert result.returncode == 0 and calls == []
+        assert "No C# files" in result.stdout
+
+    def test_a_failing_tool_fails_the_job_and_the_other_still_runs(
+        self,
+        repo: Path,
+        tmp_path: Path,
+        dotnet_stub: Path,
+    ) -> None:
+        add_files(repo, "App.sln", "Program.cs")
+        result, calls = self.run(repo, tmp_path, dotnet_stub, STUB_FAIL="dotnet format")
+        assert result.returncode == 1 and len(calls) == 2
+        assert "::group::dotnet format --verify-no-changes" in result.stdout
+        assert "FAIL dotnet format --verify-no-changes" in result.stdout
+        assert "PASS dotnet build -warnaserror" in result.stdout
+        assert "Quality checks failed: dotnet format --verify-no-changes" in result.stdout
+
+    def test_only_files_under_the_working_directory_are_considered(
+        self,
+        repo: Path,
+        tmp_path: Path,
+        dotnet_stub: Path,
+    ) -> None:
+        add_files(repo, "Top.sln", "svc/Svc.csproj", "svc/P.cs", "Top.cs")
+        result, calls = self.run(repo, tmp_path, dotnet_stub, WORKING_DIRECTORY="svc")
+        assert result.returncode == 0
+        assert "Svc.csproj" in calls[0] and "Top.sln" not in calls[0]
+
+    def test_a_missing_working_directory_is_a_configuration_error(
+        self,
+        repo: Path,
+        tmp_path: Path,
+        dotnet_stub: Path,
+    ) -> None:
+        result, _ = self.run(repo, tmp_path, dotnet_stub, WORKING_DIRECTORY="nope")
+        assert result.returncode == 1 and "[configuration]" in result.stdout

tools/quality-checks-cpp.sh

@@ -0,0 +1,144 @@
+#!/usr/bin/env bash
+# Steps of the reusable workflow .gitea/workflows/quality-checks-cpp.yml
+# (ADR-0008). The workflow checks out the calling repository, fetches this file
+# into shared-scripts/ and runs one command per step:
+#
+#   quality-checks-cpp.sh validate   check the inputs, before anything is installed
+#   quality-checks-cpp.sh install    install the exact clang tool versions into a venv
+#   quality-checks-cpp.sh run        run clang-format and clang-tidy on the tracked files
+#
+# Settings come from the environment, never from interpolated expressions:
+#   WORKING_DIRECTORY, STD, COMPILE_COMMANDS_DIR, CLANG_FORMAT_VERSION,
+#   CLANG_TIDY_VERSION, QC_VENV (and QC_BIN for tests).
+# Every failure is printed as ::error::[category] message.
+
+C_STANDARD="${C_STANDARD:-c17}"
+
+validate_inputs() {
+  set -u
+  case "$WORKING_DIRECTORY" in
+    "" | /* | .. | ../* | */.. | */../*)
+      echo "::error::[configuration] working-directory must be a relative path inside the repository."
+      exit 1
+      ;;
+  esac
+  if ! [[ "$STD" =~ ^(c\+\+|gnu\+\+)[0-9]{2}$ ]]; then
+    echo "::error::[configuration] std '$STD' is not a C++ standard such as c++20 or gnu++20."
+    exit 1
+  fi
+  case "$COMPILE_COMMANDS_DIR" in
+    /* | .. | ../* | */.. | */../*)
+      echo "::error::[configuration] compile-commands-dir must be a relative path inside the repository."
+      exit 1
+      ;;
+  esac
+  local name version
+  for name in CLANG_FORMAT_VERSION CLANG_TIDY_VERSION; do
+    version="${!name}"
+    if ! [[ "$version" =~ ^[0-9]+(\.[0-9]+){1,3}$ ]]; then
+      echo "::error::[configuration] ${name,,} '$version' is not an exact version such as 23.1.3."
+      exit 1
+    fi
+  done
+  echo "Checking C and C++ in ${WORKING_DIRECTORY} with std ${STD}"
+}
+
+install_tools() {
+  set -eu
+  python3 -m venv "$QC_VENV"
+  "$QC_VENV/bin/pip" install --quiet \
+    "clang-format==${CLANG_FORMAT_VERSION}" "clang-tidy==${CLANG_TIDY_VERSION}"
+}
+
+# A .clang-format must exist in the working directory or above it, up to the
+# top of the repository: clang-format finds its style the same way.
+find_clang_format_config() {
+  local top dir parent
+  top="$(cd "$(git rev-parse --show-toplevel)" && pwd -P)"
+  dir="$(pwd -P)"
+  while true; do
+    if [ -f "$dir/.clang-format" ] || [ -f "$dir/_clang-format" ]; then
+      return 0
+    fi
+    parent="$(dirname "$dir")"
+    # stop at the top of the repository, or at the file system root
+    if [ "$dir" = "$top" ] || [ "$parent" = "$dir" ]; then
+      return 1
+    fi
+    dir="$parent"
+  done
+}
+
+run_checks() {
+  set -u
+  QC_BIN="${QC_BIN:-$QC_VENV/bin}"
+  if [ ! -d "$WORKING_DIRECTORY" ]; then
+    echo "::error::[configuration] working-directory '$WORKING_DIRECTORY' does not exist."
+    exit 1
+  fi
+  cd "$WORKING_DIRECTORY"
+
+  local all_files cpp_files c_files
+  mapfile -t all_files < <(git ls-files -- '*.c' '*.cc' '*.cpp' '*.cxx' '*.h' '*.hh' '*.hpp' '*.hxx')
+  if [ "${#all_files[@]}" -eq 0 ]; then
+    echo "::notice::No C or C++ files in '$WORKING_DIRECTORY'; nothing was checked."
+    echo "All selected checks passed."
+    exit 0
+  fi
+  if ! find_clang_format_config; then
+    echo "::error::[configuration] No .clang-format found in '$WORKING_DIRECTORY' or above it; add the style of the project."
+    exit 1
+  fi
+  if [ -n "$COMPILE_COMMANDS_DIR" ] && [ ! -f "$COMPILE_COMMANDS_DIR/compile_commands.json" ]; then
+    echo "::error::[configuration] compile-commands-dir '$COMPILE_COMMANDS_DIR' has no compile_commands.json; build it before the call."
+    exit 1
+  fi
+
+  # .c files are C; everything else (including headers) is checked as C++.
+  mapfile -t c_files < <(git ls-files -- '*.c')
+  mapfile -t cpp_files < <(git ls-files -- '*.cc' '*.cpp' '*.cxx' '*.h' '*.hh' '*.hpp' '*.hxx')
+
+  local failed=()
+  run_tool() {
+    local name="$1"
+    shift
+    echo "::group::$name"
+    if "$@"; then
+      echo "::endgroup::"
+      echo "PASS $name"
+    else
+      echo "::endgroup::"
+      echo "FAIL $name"
+      failed+=("$name")
+    fi
+  }
+
+  run_tool "clang-format" "$QC_BIN/clang-format" --dry-run -Werror "${all_files[@]}"
+
+  if [ -n "$COMPILE_COMMANDS_DIR" ]; then
+    run_tool "clang-tidy" "$QC_BIN/clang-tidy" --quiet -p "$COMPILE_COMMANDS_DIR" "${all_files[@]}"
+  else
+    if [ "${#cpp_files[@]}" -gt 0 ]; then
+      run_tool "clang-tidy (C++)" "$QC_BIN/clang-tidy" --quiet "${cpp_files[@]}" -- "-std=${STD}"
+    fi
+    if [ "${#c_files[@]}" -gt 0 ]; then
+      run_tool "clang-tidy (C)" "$QC_BIN/clang-tidy" --quiet "${c_files[@]}" -- "-std=${C_STANDARD}"
+    fi
+  fi
+
+  if [ "${#failed[@]}" -gt 0 ]; then
+    echo "::error::Quality checks failed: ${failed[*]}"
+    exit 1
+  fi
+  echo "All selected checks passed."
+}
+
+case "${1:-}" in
+  validate) validate_inputs ;;
+  install) install_tools ;;
+  run) run_checks ;;
+  *)
+    echo "::error::[configuration] usage: quality-checks-cpp.sh validate|install|run" >&2
+    exit 2
+    ;;
+esac

tools/quality-checks-csharp.sh

@@ -0,0 +1,124 @@
+#!/usr/bin/env bash
+# Steps of the reusable workflow .gitea/workflows/quality-checks-csharp.yml
+# (ADR-0008). The workflow checks out the calling repository, fetches this file
+# into shared-scripts/ and runs one command per step:
+#
+#   quality-checks-csharp.sh validate   check the inputs, before anything is installed
+#   quality-checks-csharp.sh install    install the exact .NET SDK version
+#   quality-checks-csharp.sh run        run dotnet format and dotnet build on the project
+#
+# Settings come from the environment, never from interpolated expressions:
+#   WORKING_DIRECTORY, PROJECT, DOTNET_SDK_VERSION, DOTNET_ROOT (and
+#   QC_DOTNET_INSTALL_SCRIPT, QC_DOTNET for tests).
+# Every failure is printed as ::error::[category] message.
+
+DOTNET_INSTALL_URL="https://dot.net/v1/dotnet-install.sh"
+
+validate_inputs() {
+  set -u
+  case "$WORKING_DIRECTORY" in
+    "" | /* | .. | ../* | */.. | */../*)
+      echo "::error::[configuration] working-directory must be a relative path inside the repository."
+      exit 1
+      ;;
+  esac
+  case "$PROJECT" in
+    /* | .. | ../* | */.. | */../*)
+      echo "::error::[configuration] project must be a relative path inside the working directory."
+      exit 1
+      ;;
+  esac
+  # An exact stable version of the .NET SDK, 10 or later (no channel, no range).
+  if ! [[ "$DOTNET_SDK_VERSION" =~ ^([1-9][0-9]+)\.[0-9]+\.[0-9]+$ ]] || [ "${BASH_REMATCH[1]}" -lt 10 ]; then
+    echo "::error::[configuration] dotnet-sdk-version '$DOTNET_SDK_VERSION' is not an exact stable version 10 or later, such as 10.0.401."
+    exit 1
+  fi
+  echo "Checking C# in ${WORKING_DIRECTORY} with .NET SDK ${DOTNET_SDK_VERSION}"
+}
+
+install_sdk() {
+  set -eu
+  local script="${QC_DOTNET_INSTALL_SCRIPT:-}"
+  if [ -z "$script" ]; then
+    script="$(mktemp)"
+    curl -fsSL "$DOTNET_INSTALL_URL" -o "$script"
+  fi
+  bash "$script" --version "$DOTNET_SDK_VERSION" --install-dir "$DOTNET_ROOT" --no-path
+  "$DOTNET_ROOT/dotnet" --version
+}
+
+run_checks() {
+  set -u
+  if [ ! -d "$WORKING_DIRECTORY" ]; then
+    echo "::error::[configuration] working-directory '$WORKING_DIRECTORY' does not exist."
+    exit 1
+  fi
+  cd "$WORKING_DIRECTORY"
+  local dotnet="${QC_DOTNET:-$DOTNET_ROOT/dotnet}"
+
+  local sources
+  mapfile -t sources < <(git ls-files -- '*.cs')
+  if [ "${#sources[@]}" -eq 0 ]; then
+    echo "::notice::No C# files in '$WORKING_DIRECTORY'; nothing was checked."
+    echo "All selected checks passed."
+    exit 0
+  fi
+
+  local target="$PROJECT" candidates
+  if [ -z "$target" ]; then
+    mapfile -t candidates < <(git ls-files -- '*.sln' '*.slnx')
+    if [ "${#candidates[@]}" -eq 0 ]; then
+      mapfile -t candidates < <(git ls-files -- '*.csproj')
+    fi
+    case "${#candidates[@]}" in
+      0)
+        echo "::error::[configuration] C# files exist but no solution or project was found in '$WORKING_DIRECTORY'; add one or set the input project."
+        exit 1
+        ;;
+      1) target="${candidates[0]}" ;;
+      *)
+        echo "::error::[configuration] Several solutions or projects were found (${candidates[*]}); set the input project."
+        exit 1
+        ;;
+    esac
+  elif [ ! -f "$target" ]; then
+    echo "::error::[configuration] project '$target' does not exist in '$WORKING_DIRECTORY'."
+    exit 1
+  fi
+  echo "Checking $target"
+
+  export DOTNET_CLI_TELEMETRY_OPTOUT=1 DOTNET_NOLOGO=1
+  local failed=()
+  run_tool() {
+    local name="$1"
+    shift
+    echo "::group::$name"
+    if "$@"; then
+      echo "::endgroup::"
+      echo "PASS $name"
+    else
+      echo "::endgroup::"
+      echo "FAIL $name"
+      failed+=("$name")
+    fi
+  }
+
+  run_tool "dotnet format --verify-no-changes" "$dotnet" format "$target" --verify-no-changes
+  run_tool "dotnet build -warnaserror" "$dotnet" build "$target" --nologo -warnaserror
+
+  if [ "${#failed[@]}" -gt 0 ]; then
+    echo "::error::Quality checks failed: ${failed[*]}"
+    exit 1
+  fi
+  echo "All selected checks passed."
+}
+
+case "${1:-}" in
+  validate) validate_inputs ;;
+  install) install_sdk ;;
+  run) run_checks ;;
+  *)
+    echo "::error::[configuration] usage: quality-checks-csharp.sh validate|install|run" >&2
+    exit 2
+    ;;
+esac

wiki/Home.da.md

@@ -1,4 +1,4 @@
-<!-- translation of Home.md, source sha256 c9c04abaf4ae -->
+<!-- translation of Home.md, source sha256 5751829e99af -->
 
 > Dette er en oversættelse af [`Home`](Home). Den engelske side er autoritativ, og ændringer her bliver overskrevet, næste gang wikien publiceres.
 
@@ -13,18 +13,20 @@ En samling af genbrugelige Gitea Actions-workflows til DevOps-professionelle og
 
 Dette repository er den centrale samling af genbrugelig automatisering til TirSystems repositories. Det primære repository ligger på `git.tirsystem.com` (Gitea) og spejles med push til GitHub.
 
-Det indeholder seks workflows: synkronisering af metadata til GitHub-spejlet, publicering af wiki, fælles kvalitetskontrol, et udgivelsesworkflow, publicering af accepterede milepæle og repositoryets egen validering. De er listet med formål og diagram under [Workflows](#workflows).
+Det indeholder otte workflows: synkronisering af metadata til GitHub-spejlet, publicering af wiki, fælles kvalitetskontrol for Python og shell, for C og C++ og for C#, et udgivelsesworkflow, publicering af accepterede milepæle og repositoryets egen validering. De er listet med formål og diagram under [Workflows](#workflows).
 
 
 ## Workflows
 
-Der er seks workflows i dette repository. Et **scoped** workflow leveres af instansen til alle repositories i TirSystem-organisationerne og kræver intet i repositoryet; et **genbrugeligt** workflow kaldes fra et repository med `uses:`; de øvrige kører kun her. Diagrammerne er PlantUML-kildekode og er på engelsk.
+Der er otte workflows i dette repository. Et **scoped** workflow leveres af instansen til alle repositories i TirSystem-organisationerne og kræver intet i repositoryet; et **genbrugeligt** workflow kaldes fra et repository med `uses:`; de øvrige kører kun her. Diagrammerne er PlantUML-kildekode og er på engelsk.
 
 | Workflow | Fil | Type | Starter ved | Formål |
 | --- | --- | --- | --- | --- |
 | Sync GitHub mirror metadata | [`sync-github-metadata.yml`](https://git.tirsystem.com/TirSystem/github-action/src/branch/main/.gitea/scoped_workflows/sync-github-metadata.yml) | Scoped | push til `main`, manuelt, dagligt kl. 03:17 UTC | Kopierer beskrivelsen og emnerne for et Gitea-repository til dets GitHub push-spejl |
 | Publish wiki | [`publish-wiki.yml`](https://git.tirsystem.com/TirSystem/github-action/src/branch/main/.gitea/scoped_workflows/publish-wiki.yml) | Scoped, tilmelding med `wiki/.publish` | push til `main`, der ændrer `wiki/**`, manuelt | Publicerer siderne i `wiki/` til repositoryets wiki |
 | Quality checks | [`quality-checks.yml`](https://git.tirsystem.com/TirSystem/github-action/src/branch/main/.gitea/workflows/quality-checks.yml) | Genbrugeligt (`workflow_call`) | et kald fra et andet repository | Kører ruff, mypy, shellcheck og shfmt på de sporede filer og ændrer intet |
+| Quality checks C++ | [`quality-checks-cpp.yml`](https://git.tirsystem.com/TirSystem/github-action/src/branch/main/.gitea/workflows/quality-checks-cpp.yml) | Genbrugeligt (`workflow_call`) | et kald fra et andet repository | Kører clang-format og clang-tidy i præcise versioner på de sporede C- og C++-filer og ændrer intet |
+| Quality checks C# | [`quality-checks-csharp.yml`](https://git.tirsystem.com/TirSystem/github-action/src/branch/main/.gitea/workflows/quality-checks-csharp.yml) | Genbrugeligt (`workflow_call`) | et kald fra et andet repository | Kører `dotnet format` og `dotnet build` på et præcist .NET SDK 10 eller nyere og ændrer intet |
 | Release | [`release.yml`](https://git.tirsystem.com/TirSystem/github-action/src/branch/main/.gitea/workflows/release.yml) | Kun dette repository | manuelt | Opretter versionstagget, udgivelsessiden og major-tagget efter kontrollerne |
 | Publicering af accepterede milepæle | [`sync-milestones.yml`](https://git.tirsystem.com/TirSystem/github-action/src/branch/main/.gitea/workflows/sync-milestones.yml) | Kun dette repository | push til `main`, der ændrer `docs/milestones/**` eller `docs/sqa/reviews/**`, manuelt (tørkørsel som standard) | Opretter eller opdaterer Gitea-milepælen og issues for hver milepæl, der er Accepted med en Go-gennemgang |
 | Validate workflows | [`validate-workflows.yml`](https://git.tirsystem.com/TirSystem/github-action/src/branch/main/.gitea/workflows/validate-workflows.yml) | Kun dette repository | pull request, push til `main`, manuelt | Læser hvert workflow som YAML og kører offline-testene |
@@ -185,6 +187,96 @@ deactivate Workflow
 @enduml
 ```
 
+### Kvalitetskontrol C++
+
+Et genbrugeligt workflow til C og C++, kaldt med `uses: TirSystem/github-action/.gitea/workflows/quality-checks-cpp.yml@v1` (ADR-0008). Repositoryet skal have en `.clang-format`; en `.clang-tidy` og en compile-database er valgfrie.
+
+#### Workflow
+
+```plantuml
+@startuml
+title Shared quality checks for C and C++ (reusable workflow)
+
+autonumber
+
+actor "Calling repository\nuses: ...quality-checks-cpp.yml@v1" as Caller
+participant "Gitea Actions\nquality-checks-cpp" as Workflow
+participant "PyPI" as PyPI
+
+Caller -> Workflow: workflow_call with working-directory, std,\ncompile-commands-dir and tool versions
+activate Workflow
+
+Workflow -> Workflow: Check out the caller and the shared script
+Workflow -> Workflow: Validate the inputs
+alt an input is invalid or a version is not exact
+  Workflow --> Caller: Fail with [configuration]
+end
+
+Workflow -> PyPI: Install clang-format and clang-tidy at the exact versions
+PyPI --> Workflow: Tools installed
+
+alt no C or C++ file is tracked
+  Workflow --> Caller: Notice: nothing was checked, pass
+else no .clang-format, or compile-commands-dir\nwithout compile_commands.json
+  Workflow --> Caller: Fail with [configuration]
+else
+  Workflow -> Workflow: clang-format --dry-run -Werror on all files
+  Workflow -> Workflow: clang-tidy on the C++ files (-std=std)\nand on the C files (or with the compile database)
+  alt any tool failed
+    Workflow --> Caller: Fail with tool, file and line in the log
+  else
+    Workflow --> Caller: All selected checks passed
+  end
+end
+deactivate Workflow
+@enduml
+```
+
+### Kvalitetskontrol C#
+
+Et genbrugeligt workflow til C#, kaldt med `uses: TirSystem/github-action/.gitea/workflows/quality-checks-csharp.yml@v1` (ADR-0008). Det installerer det præcise .NET SDK, som `dotnet-sdk-version` angiver (10 eller nyere), og skal bruge netværket til pakkegendannelsen.
+
+#### Workflow
+
+```plantuml
+@startuml
+title Shared quality checks for C# (reusable workflow)
+
+autonumber
+
+actor "Calling repository\nuses: ...quality-checks-csharp.yml@v1" as Caller
+participant "Gitea Actions\nquality-checks-csharp" as Workflow
+participant "dot.net\n(dotnet-install.sh)" as DotNet
+
+Caller -> Workflow: workflow_call with working-directory,\nproject and dotnet-sdk-version
+activate Workflow
+
+Workflow -> Workflow: Check out the caller and the shared script
+Workflow -> Workflow: Validate the inputs
+alt an input is invalid or the SDK is not an exact\nstable version 10 or later
+  Workflow --> Caller: Fail with [configuration]
+end
+
+Workflow -> DotNet: Install the exact .NET SDK version
+DotNet --> Workflow: SDK installed
+
+alt no C# file is tracked
+  Workflow --> Caller: Notice: nothing was checked, pass
+else no solution or project, or several without the project input
+  Workflow --> Caller: Fail with [configuration] that names them
+else
+  Workflow -> Workflow: dotnet format --verify-no-changes
+  Workflow -> Workflow: dotnet build -warnaserror\n(package restore needs the network)
+  alt any tool failed
+    Workflow --> Caller: Fail with tool, file and line in the log
+  else
+    Workflow --> Caller: All selected checks passed
+  end
+end
+deactivate Workflow
+@enduml
+```
+
 ### Udgivelse
 
 Startes manuelt af en vedligeholder; med `dry_run` `true` (standard) kontrollerer det kun (se [udgivelsesprocessen](https://git.tirsystem.com/TirSystem/github-action/src/branch/main/guides/release-process.md)).

wiki/Home.md

@@ -13,18 +13,20 @@ A collection of reusable Gitea Actions workflows for DevOps professionals and so
 
 This repository is the central collection of reusable automation for TirSystem repositories. The primary repository lives at `git.tirsystem.com` (Gitea) and is push-mirrored to GitHub.
 
-It contains six workflows: metadata sync to the GitHub mirror, wiki publishing, shared quality checks, a release workflow, the publishing of accepted milestones and the repository's own validation. They are listed with their purpose and a diagram under [Workflows](#workflows).
+It contains eight workflows: metadata sync to the GitHub mirror, wiki publishing, shared quality checks for Python and shell, for C and C++ and for C#, a release workflow, the publishing of accepted milestones and the repository's own validation. They are listed with their purpose and a diagram under [Workflows](#workflows).
 
 
 ## Workflows
 
-Six workflows live in this repository. A **scoped** workflow is delivered by the instance to every repository of the TirSystem organizations and needs nothing in the repository; a **reusable** workflow is called by a repository with `uses:`; the others run only here. The diagrams are PlantUML source.
+Eight workflows live in this repository. A **scoped** workflow is delivered by the instance to every repository of the TirSystem organizations and needs nothing in the repository; a **reusable** workflow is called by a repository with `uses:`; the others run only here. The diagrams are PlantUML source.
 
 | Workflow | File | Kind | Starts on | Purpose |
 | --- | --- | --- | --- | --- |
 | Sync GitHub mirror metadata | [`sync-github-metadata.yml`](https://git.tirsystem.com/TirSystem/github-action/src/branch/main/.gitea/scoped_workflows/sync-github-metadata.yml) | Scoped | push to `main`, manual, daily 03:17 UTC | Copies the description and topics of a Gitea repository to its GitHub push mirror |
 | Publish wiki | [`publish-wiki.yml`](https://git.tirsystem.com/TirSystem/github-action/src/branch/main/.gitea/scoped_workflows/publish-wiki.yml) | Scoped, opt-in with `wiki/.publish` | push to `main` that changes `wiki/**`, manual | Publishes the pages in `wiki/` to the repository wiki |
 | Quality checks | [`quality-checks.yml`](https://git.tirsystem.com/TirSystem/github-action/src/branch/main/.gitea/workflows/quality-checks.yml) | Reusable (`workflow_call`) | a call from another repository | Runs ruff, mypy, shellcheck and shfmt on the tracked files and changes nothing |
+| Quality checks C++ | [`quality-checks-cpp.yml`](https://git.tirsystem.com/TirSystem/github-action/src/branch/main/.gitea/workflows/quality-checks-cpp.yml) | Reusable (`workflow_call`) | a call from another repository | Runs clang-format and clang-tidy at exact versions on the tracked C and C++ files and changes nothing |
+| Quality checks C# | [`quality-checks-csharp.yml`](https://git.tirsystem.com/TirSystem/github-action/src/branch/main/.gitea/workflows/quality-checks-csharp.yml) | Reusable (`workflow_call`) | a call from another repository | Runs `dotnet format` and `dotnet build` on an exact .NET SDK 10 or later and changes nothing |
 | Release | [`release.yml`](https://git.tirsystem.com/TirSystem/github-action/src/branch/main/.gitea/workflows/release.yml) | This repository only | manual | Creates the version tag, the release page and the major tag after the checks |
 | Publish accepted milestones | [`sync-milestones.yml`](https://git.tirsystem.com/TirSystem/github-action/src/branch/main/.gitea/workflows/sync-milestones.yml) | This repository only | push to `main` that changes `docs/milestones/**` or `docs/sqa/reviews/**`, manual (dry run by default) | Creates or updates the Gitea milestone and issues of every milestone that is Accepted with a Go review |
 | Validate workflows | [`validate-workflows.yml`](https://git.tirsystem.com/TirSystem/github-action/src/branch/main/.gitea/workflows/validate-workflows.yml) | This repository only | pull request, push to `main`, manual | Parses every workflow and runs the offline tests |
@@ -185,6 +187,96 @@ deactivate Workflow
 @enduml
 ```
 
+### Quality checks C++
+
+A reusable workflow for C and C++, called with `uses: TirSystem/github-action/.gitea/workflows/quality-checks-cpp.yml@v1` (ADR-0008). The repository needs a `.clang-format`; a `.clang-tidy` and a compile database are optional.
+
+#### Workflow
+
+```plantuml
+@startuml
+title Shared quality checks for C and C++ (reusable workflow)
+
+autonumber
+
+actor "Calling repository\nuses: ...quality-checks-cpp.yml@v1" as Caller
+participant "Gitea Actions\nquality-checks-cpp" as Workflow
+participant "PyPI" as PyPI
+
+Caller -> Workflow: workflow_call with working-directory, std,\ncompile-commands-dir and tool versions
+activate Workflow
+
+Workflow -> Workflow: Check out the caller and the shared script
+Workflow -> Workflow: Validate the inputs
+alt an input is invalid or a version is not exact
+  Workflow --> Caller: Fail with [configuration]
+end
+
+Workflow -> PyPI: Install clang-format and clang-tidy at the exact versions
+PyPI --> Workflow: Tools installed
+
+alt no C or C++ file is tracked
+  Workflow --> Caller: Notice: nothing was checked, pass
+else no .clang-format, or compile-commands-dir\nwithout compile_commands.json
+  Workflow --> Caller: Fail with [configuration]
+else
+  Workflow -> Workflow: clang-format --dry-run -Werror on all files
+  Workflow -> Workflow: clang-tidy on the C++ files (-std=std)\nand on the C files (or with the compile database)
+  alt any tool failed
+    Workflow --> Caller: Fail with tool, file and line in the log
+  else
+    Workflow --> Caller: All selected checks passed
+  end
+end
+deactivate Workflow
+@enduml
+```
+
+### Quality checks C#
+
+A reusable workflow for C#, called with `uses: TirSystem/github-action/.gitea/workflows/quality-checks-csharp.yml@v1` (ADR-0008). It installs the exact .NET SDK given by `dotnet-sdk-version` (10 or later) and needs the network for the package restore.
+
+#### Workflow
+
+```plantuml
+@startuml
+title Shared quality checks for C# (reusable workflow)
+
+autonumber
+
+actor "Calling repository\nuses: ...quality-checks-csharp.yml@v1" as Caller
+participant "Gitea Actions\nquality-checks-csharp" as Workflow
+participant "dot.net\n(dotnet-install.sh)" as DotNet
+
+Caller -> Workflow: workflow_call with working-directory,\nproject and dotnet-sdk-version
+activate Workflow
+
+Workflow -> Workflow: Check out the caller and the shared script
+Workflow -> Workflow: Validate the inputs
+alt an input is invalid or the SDK is not an exact\nstable version 10 or later
+  Workflow --> Caller: Fail with [configuration]
+end
+
+Workflow -> DotNet: Install the exact .NET SDK version
+DotNet --> Workflow: SDK installed
+
+alt no C# file is tracked
+  Workflow --> Caller: Notice: nothing was checked, pass
+else no solution or project, or several without the project input
+  Workflow --> Caller: Fail with [configuration] that names them
+else
+  Workflow -> Workflow: dotnet format --verify-no-changes
+  Workflow -> Workflow: dotnet build -warnaserror\n(package restore needs the network)
+  alt any tool failed
+    Workflow --> Caller: Fail with tool, file and line in the log
+  else
+    Workflow --> Caller: All selected checks passed
+  end
+end
+deactivate Workflow
+@enduml
+```
+
 ### Release
 
 Started by hand by a maintainer; with `dry_run` `true` (the default) it only checks (see the [release process](https://git.tirsystem.com/TirSystem/github-action/src/branch/main/guides/release-process.md)).

wiki/Home.ms.md

@@ -1,4 +1,4 @@
-<!-- translation of Home.md, source sha256 c9c04abaf4ae -->
+<!-- translation of Home.md, source sha256 5751829e99af -->
 
 > Ini ialah terjemahan [`Home`](Home). Halaman bahasa Inggeris ialah teks yang sah, dan perubahan di sini akan ditimpa pada penerbitan wiki yang seterusnya.
 
@@ -13,18 +13,20 @@ Koleksi aliran kerja (workflow) Gitea Actions yang boleh digunakan semula untuk
 
 Repositori ini ialah koleksi pusat bagi automasi yang boleh digunakan semula untuk repositori TirSystem. Repositori utama berada di `git.tirsystem.com` (Gitea) dan dicerminkan dengan push ke GitHub.
 
-Ia mengandungi enam aliran kerja: penyegerakan metadata ke cermin GitHub, penerbitan wiki, semakan kualiti bersama, aliran kerja keluaran, penerbitan pencapaian (milestone) yang diterima dan pengesahan repositori sendiri. Ia disenaraikan dengan tujuan dan rajah di bawah [Aliran kerja](#aliran-kerja).
+Ia mengandungi lapan aliran kerja: penyegerakan metadata ke cermin GitHub, penerbitan wiki, semakan kualiti bersama untuk Python dan shell, untuk C dan C++ serta untuk C#, aliran kerja keluaran, penerbitan pencapaian (milestone) yang diterima dan pengesahan repositori sendiri. Ia disenaraikan dengan tujuan dan rajah di bawah [Aliran kerja](#aliran-kerja).
 
 
 ## Aliran kerja
 
-Terdapat enam aliran kerja dalam repositori ini. Aliran kerja **scoped** dihantar oleh instans ke setiap repositori organisasi TirSystem dan tidak memerlukan apa-apa dalam repositori; aliran kerja **boleh guna semula** dipanggil oleh sebuah repositori dengan `uses:`; yang lain hanya berjalan di sini. Rajah ialah kod sumber PlantUML dan dalam bahasa Inggeris.
+Terdapat lapan aliran kerja dalam repositori ini. Aliran kerja **scoped** dihantar oleh instans ke setiap repositori organisasi TirSystem dan tidak memerlukan apa-apa dalam repositori; aliran kerja **boleh guna semula** dipanggil oleh sebuah repositori dengan `uses:`; yang lain hanya berjalan di sini. Rajah ialah kod sumber PlantUML dan dalam bahasa Inggeris.
 
 | Aliran kerja | Fail | Jenis | Bermula apabila | Tujuan |
 | --- | --- | --- | --- | --- |
 | Sync GitHub mirror metadata | [`sync-github-metadata.yml`](https://git.tirsystem.com/TirSystem/github-action/src/branch/main/.gitea/scoped_workflows/sync-github-metadata.yml) | Scoped | push ke `main`, manual, setiap hari 03:17 UTC | Menyalin penerangan dan topik repositori Gitea ke push mirror GitHub-nya |
 | Publish wiki | [`publish-wiki.yml`](https://git.tirsystem.com/TirSystem/github-action/src/branch/main/.gitea/scoped_workflows/publish-wiki.yml) | Scoped, pilih menyertai dengan `wiki/.publish` | push ke `main` yang mengubah `wiki/**`, manual | Menerbitkan halaman dalam `wiki/` ke wiki repositori |
 | Quality checks | [`quality-checks.yml`](https://git.tirsystem.com/TirSystem/github-action/src/branch/main/.gitea/workflows/quality-checks.yml) | Boleh guna semula (`workflow_call`) | panggilan daripada repositori lain | Menjalankan ruff, mypy, shellcheck dan shfmt pada fail yang dijejaki dan tidak mengubah apa-apa |
+| Quality checks C++ | [`quality-checks-cpp.yml`](https://git.tirsystem.com/TirSystem/github-action/src/branch/main/.gitea/workflows/quality-checks-cpp.yml) | Boleh guna semula (`workflow_call`) | panggilan daripada repositori lain | Menjalankan clang-format dan clang-tidy pada versi tepat pada fail C dan C++ yang dijejaki dan tidak mengubah apa-apa |
+| Quality checks C# | [`quality-checks-csharp.yml`](https://git.tirsystem.com/TirSystem/github-action/src/branch/main/.gitea/workflows/quality-checks-csharp.yml) | Boleh guna semula (`workflow_call`) | panggilan daripada repositori lain | Menjalankan `dotnet format` dan `dotnet build` pada .NET SDK 10 atau lebih baharu yang tepat dan tidak mengubah apa-apa |
 | Release | [`release.yml`](https://git.tirsystem.com/TirSystem/github-action/src/branch/main/.gitea/workflows/release.yml) | Repositori ini sahaja | manual | Mencipta tag versi, halaman keluaran dan tag major selepas semakan |
 | Menerbitkan milestone yang diterima | [`sync-milestones.yml`](https://git.tirsystem.com/TirSystem/github-action/src/branch/main/.gitea/workflows/sync-milestones.yml) | Repositori ini sahaja | push ke `main` yang mengubah `docs/milestones/**` atau `docs/sqa/reviews/**`, manual (larian percubaan secara lalai) | Mencipta atau mengemas kini milestone Gitea dan isu bagi setiap milestone yang Accepted dengan semakan Go |
 | Validate workflows | [`validate-workflows.yml`](https://git.tirsystem.com/TirSystem/github-action/src/branch/main/.gitea/workflows/validate-workflows.yml) | Repositori ini sahaja | pull request, push ke `main`, manual | Menghurai setiap aliran kerja sebagai YAML dan menjalankan ujian luar talian |
@@ -185,6 +187,96 @@ deactivate Workflow
 @enduml
 ```
 
+### Semakan kualiti C++
+
+Aliran kerja boleh guna semula untuk C dan C++, dipanggil dengan `uses: TirSystem/github-action/.gitea/workflows/quality-checks-cpp.yml@v1` (ADR-0008). Repositori mesti mempunyai `.clang-format`; `.clang-tidy` dan pangkalan data kompilasi adalah pilihan.
+
+#### Aliran kerja
+
+```plantuml
+@startuml
+title Shared quality checks for C and C++ (reusable workflow)
+
+autonumber
+
+actor "Calling repository\nuses: ...quality-checks-cpp.yml@v1" as Caller
+participant "Gitea Actions\nquality-checks-cpp" as Workflow
+participant "PyPI" as PyPI
+
+Caller -> Workflow: workflow_call with working-directory, std,\ncompile-commands-dir and tool versions
+activate Workflow
+
+Workflow -> Workflow: Check out the caller and the shared script
+Workflow -> Workflow: Validate the inputs
+alt an input is invalid or a version is not exact
+  Workflow --> Caller: Fail with [configuration]
+end
+
+Workflow -> PyPI: Install clang-format and clang-tidy at the exact versions
+PyPI --> Workflow: Tools installed
+
+alt no C or C++ file is tracked
+  Workflow --> Caller: Notice: nothing was checked, pass
+else no .clang-format, or compile-commands-dir\nwithout compile_commands.json
+  Workflow --> Caller: Fail with [configuration]
+else
+  Workflow -> Workflow: clang-format --dry-run -Werror on all files
+  Workflow -> Workflow: clang-tidy on the C++ files (-std=std)\nand on the C files (or with the compile database)
+  alt any tool failed
+    Workflow --> Caller: Fail with tool, file and line in the log
+  else
+    Workflow --> Caller: All selected checks passed
+  end
+end
+deactivate Workflow
+@enduml
+```
+
+### Semakan kualiti C#
+
+Aliran kerja boleh guna semula untuk C#, dipanggil dengan `uses: TirSystem/github-action/.gitea/workflows/quality-checks-csharp.yml@v1` (ADR-0008). Ia memasang .NET SDK tepat yang diberikan oleh `dotnet-sdk-version` (10 atau lebih baharu) dan memerlukan rangkaian untuk pemulihan pakej.
+
+#### Aliran kerja
+
+```plantuml
+@startuml
+title Shared quality checks for C# (reusable workflow)
+
+autonumber
+
+actor "Calling repository\nuses: ...quality-checks-csharp.yml@v1" as Caller
+participant "Gitea Actions\nquality-checks-csharp" as Workflow
+participant "dot.net\n(dotnet-install.sh)" as DotNet
+
+Caller -> Workflow: workflow_call with working-directory,\nproject and dotnet-sdk-version
+activate Workflow
+
+Workflow -> Workflow: Check out the caller and the shared script
+Workflow -> Workflow: Validate the inputs
+alt an input is invalid or the SDK is not an exact\nstable version 10 or later
+  Workflow --> Caller: Fail with [configuration]
+end
+
+Workflow -> DotNet: Install the exact .NET SDK version
+DotNet --> Workflow: SDK installed
+
+alt no C# file is tracked
+  Workflow --> Caller: Notice: nothing was checked, pass
+else no solution or project, or several without the project input
+  Workflow --> Caller: Fail with [configuration] that names them
+else
+  Workflow -> Workflow: dotnet format --verify-no-changes
+  Workflow -> Workflow: dotnet build -warnaserror\n(package restore needs the network)
+  alt any tool failed
+    Workflow --> Caller: Fail with tool, file and line in the log
+  else
+    Workflow --> Caller: All selected checks passed
+  end
+end
+deactivate Workflow
+@enduml
+```
+
 ### Keluaran
 
 Dimulakan secara manual oleh penyelenggara; dengan `dry_run` `true` (lalai) ia hanya menyemak (lihat [proses keluaran](https://git.tirsystem.com/TirSystem/github-action/src/branch/main/guides/release-process.md)).