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# TirSystem GitHub Actions

A collection of reusable Gitea Actions workflows for DevOps professionals and software engineers working on TirSystem projects.


## Overview

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 five workflows: metadata sync to the GitHub mirror, wiki publishing, shared quality checks, a release workflow and the repository's own validation. They are listed with their purpose and a diagram under [Workflows](#workflows).


## Workflows

Five 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 |
| 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 |
| 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 |

### Sync GitHub metadata

Syncs the Gitea repository description and topics to the GitHub push mirror.

#### Cron

Daily at 03:17 UTC (`17 3 * * *`), plus every push to `main` and manual `workflow_dispatch`.

#### Workflow

```plantuml
@startuml
title Sync Gitea repository description and topics to GitHub

autonumber

actor "Push to main,\nmanual trigger, or schedule" as Trigger
participant "Gitea Actions\nsync-github-metadata" as Workflow
participant "Gitea REST API" as Gitea
participant "GitHub REST API" as GitHub

Trigger -> Workflow: Start workflow
activate Workflow

Workflow -> Workflow: Read and validate secrets
note right
TOKEN_FOR_GITEA
PAT_FOR_GITHUB
end note

alt secret validation failed
  Workflow --> Trigger: workflow failed
end


Workflow -> Gitea: GET /repos/{owner}/{repo}
Gitea --> Workflow: Description and topics

Workflow -> Gitea: GET /repos/{owner}/{repo}/push_mirrors
Gitea --> Workflow: Push mirror response

alt mirrors is not a list
    Workflow --> Trigger: Log a warning and succeed\n(GitHub metadata not synced)
else mirrors is a list with no GitHub mirror
    Workflow --> Trigger: Log that there is nothing to sync and succeed
else mirrors is a list
    Workflow -> Workflow: Find GitHub owner and repo from remote_address

    Workflow -> GitHub: PATCH /repos/{owner}/{repo}\n{description}
    GitHub --> Workflow: Repository updated

    Workflow -> GitHub: PUT /repos/{owner}/{repo}/topics\n{names}
    GitHub --> Workflow: Topics updated

    Workflow --> Trigger: Sync completed
else Gitea API denies access
    Gitea --> Workflow: HTTP 403 Forbidden
    Workflow --> Trigger: Workflow fails
else GitHub API denies access
    GitHub --> Workflow: HTTP error
    Workflow --> Trigger: Workflow fails
end
deactivate Workflow
@enduml
```

### Publish wiki

Publishes `wiki/` to the repository wiki, only in a repository that has opted in with `wiki/.publish`. The word `prune` in that file also deletes pages that are not in `wiki/`.

#### Workflow

```plantuml
@startuml
title Publish wiki/ to the repository wiki

autonumber

actor "Push to main that changes wiki/**,\nor manual trigger" as Trigger
participant "Gitea Actions\npublish-wiki" as Workflow
participant "shared-scripts\n(tools/publish_wiki.py at v1)" as Script
participant "Gitea wiki API" as Wiki

Trigger -> Workflow: Start workflow
activate Workflow
Workflow -> Script: Check out the repository and the script, run it
activate Script

alt wiki/.publish does not exist
  Script --> Workflow: Log that publishing is not enabled and succeed\n(nothing is written)
else wiki/ has no Markdown pages
  Script --> Workflow: Fail with [configuration]\n(an empty wiki/ never deletes pages)
else
  Script -> Script: Read the marker (empty, or the word prune)\nand TOKEN_FOR_GITEA_WIKI
  Script -> Wiki: GET repository (preflight)
  Wiki --> Script: Wiki is enabled, token accepted
  Script -> Wiki: GET pages
  Wiki --> Script: Existing pages
  Script -> Wiki: Create new pages, update changed pages
  opt marker says prune
    Script -> Wiki: Delete pages that are not in wiki/
  end
  Script --> Workflow: Log created, updated and deleted counts
end
deactivate Script
Workflow --> Trigger: Workflow result
deactivate Workflow
@enduml
```

### Quality checks

A reusable workflow for Python and shell, called with `uses: TirSystem/github-action/.gitea/workflows/quality-checks.yml@v1` (see the [guide](QualityChecksPythonShell)).

#### Workflow

```plantuml
@startuml
title Shared quality checks (reusable workflow)

autonumber

actor "Calling repository\nuses: ...quality-checks.yml@v1" as Caller
participant "Gitea Actions\nquality-checks" as Workflow
participant "PyPI" as PyPI

Caller -> Workflow: workflow_call with languages,\nworking-directory and tool versions
activate Workflow

Workflow -> Workflow: Validate the inputs
alt languages or working-directory is invalid
  Workflow --> Caller: Fail with [configuration]
end

Workflow -> Workflow: Check out the calling repository
Workflow -> PyPI: Install the pinned tools in a virtual environment\n(ruff, mypy, shellcheck-py, shfmt-py as selected)
PyPI --> Workflow: Tools installed

loop for each selected language
  Workflow -> Workflow: List tracked files
  alt no files of that language
    Workflow -> Workflow: Notice: nothing was checked
  else
    Workflow -> Workflow: Run every tool and record PASS or FAIL
  end
end

alt any tool failed
  Workflow --> Caller: Fail and list the failed tools
else
  Workflow --> Caller: All selected checks passed
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)).

#### Workflow

```plantuml
@startuml
title Release this repository

autonumber

actor "Maintainer\n(workflow_dispatch: version, dry_run)" as Trigger
participant "Gitea Actions\nrelease" as Workflow
participant "Gitea REST API" as Gitea

Trigger -> Workflow: Start with version and dry_run
activate Workflow

Workflow -> Workflow: Check the version and read CHANGELOG.md
alt version malformed or no changelog entry
  Workflow --> Trigger: Fail with [validation] or [configuration]
end

Workflow -> Gitea: GET branch main and status of the commit
Gitea --> Workflow: Tip of main and the validation run
alt commit is not the tip of main,\nor the validation run is not green
  Workflow --> Trigger: Fail with [validation]\n(no tag is created)
end

Workflow -> Gitea: GET tags
Gitea --> Workflow: Existing tags
alt tag vMAJOR.MINOR.PATCH exists
  Workflow --> Trigger: Fail with [validation]\n(tags are never moved)
end

alt dry_run is true (default)
  Workflow --> Trigger: Log what would be created and stop
else
  Workflow -> Gitea: POST release (creates the version tag,\nbody is the changelog entry)
  opt this is the highest version of its major
    Workflow -> Gitea: Delete and recreate the major tag vMAJOR
  end
  Workflow --> Trigger: Released
end
deactivate Workflow
@enduml
```

### Validate workflows

The repository's own validation: the offline tests that gate every pull request.

#### Workflow

```plantuml
@startuml
title Validate workflows (this repository's own checks)

autonumber

actor "Pull request,\npush to main, or manual trigger" as Trigger
participant "Gitea Actions\nvalidate-workflows" as Workflow

Trigger -> Workflow: Start workflow
activate Workflow
Workflow -> Workflow: Check out the repository
Workflow -> Workflow: Create a virtual environment and\ninstall tests/requirements.txt
Workflow -> Workflow: Run pytest on tests/ (offline, no secrets):\nworkflows parse as YAML, no embedded Python,\nscripts compile, wiki pages and translations are current,\nsync, publish and release flows against a fake API

alt a test fails
  Workflow --> Trigger: Workflow fails (the pull request is not ready)
else
  Workflow --> Trigger: Workflow succeeds
end
deactivate Workflow
@enduml
```


## Requirements

- A Gitea instance with Actions enabled and a runner providing `ubuntu-latest` with `python3`
- A configured GitHub push mirror on the Gitea repository (at most one; repositories without a mirror are skipped successfully)
- Repository secrets:
  - `TOKEN_FOR_GITEA`: Gitea API token (the token only, no JSON)
  - `PAT_FOR_GITHUB`: a GitHub personal access token allowed to edit the mirror repository (the token only, no JSON)
  - `TOKEN_FOR_GITEA_WIKI` (only for repositories that publish a wiki, see the [onboarding guide](Onboarding)): a Gitea token that can write the wiki, stored as a secret of the repository's organization; there is no fallback to `TOKEN_FOR_GITEA`


## Setup

No dependencies need to be installed; the workflow uses only the Python standard library.

1. Clone the repository:
   ```bash
   git clone ssh://git@git.tirsystem.com:10022/TirSystem/github-action.git
   ```
2. Add the secrets listed under [Requirements](#requirements) to the repository settings in Gitea.
3. Configure the GitHub push mirror in the repository settings.


## Run

Workflows run automatically on push to `main` and on the daily schedule. To run manually, trigger **Sync GitHub mirror metadata** via `workflow_dispatch` from the Actions tab in Gitea.


## Tests

The workflow files and the scripts in `tools/` are validated by offline tests that need no network access and no secrets:

```bash
python3 -m venv .venv
source .venv/bin/activate        # Windows PowerShell: .venv\Scripts\Activate.ps1
python -m pip install -r tests/requirements.txt
python -m pytest -q tests
```

The same checks run on every pull request and push to `main` through [`validate-workflows.yml`](https://git.tirsystem.com/TirSystem/github-action/src/branch/main/.gitea/workflows/validate-workflows.yml). They parse every workflow as YAML, check that none embeds Python, compile the scripts in `tools/`, require explicit job permissions, and test credential parsing, push mirror address parsing and the sync and publish flows against a fake API.

After a change to the sync workflow, also trigger **Sync GitHub mirror metadata** manually in Gitea and compare the description and topics on the GitHub mirror.