# SPDX-FileCopyrightText: 2026 John Coffey <johnellis@linux.com>
# SPDX-License-Identifier: Apache-2.0 OR MIT
#
# CI on the self-hosted Gitea. Gitea reads .gitea/workflows and ignores
# .github/ once this directory exists; .github/workflows is GitHub's side of
# the switch below.
#
# Every job runs in an image pinned by digest (tag in the trailing comment),
# and the only actions used are coffey-labs/actions ones pinned by SHA. The
# instance resolves short `uses:` against itself, never GitHub, so nothing
# unreviewed can be pulled in.
#
# BUILD ON GITHUB. The org variable BUILD_ON decides which forge builds.
# Set to 'github', the test job below skips and .github/workflows/ci.yml does
# the work on GitHub's runners -- GitHub holds a push mirror of this
# repository, updated on every commit -- and reports back as the commit status
# "github/ci (branch)" or "github/ci (tag)". The `github` job waits for that
# status and passes or fails with it, so a run here still says whether the
# commit is good. Unset (or anything but 'github'), the tests run here.
#
# Releases are built only on GitHub: each architecture is compiled on a
# native runner there, and these runners are amd64 only. With BUILD_ON unset
# a v* tag is tested here but not released.
name: ci

on:
  push:
    branches: [main]
    tags: ["v*"]
  pull_request:

concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true

jobs:
  # The unit and mock tests; the #[ignore]d ones need live servers or
  # containers and run by hand (README, "Testing").
  test:
    if: ${{ vars.BUILD_ON != 'github' }}
    runs-on: light
    container:
      image: rust:1-bookworm@sha256:93ce27a88655056a51dbdd8f5f2d7ddc071c7b0070fb288a37b5a285fc83971e # 1-bookworm
    steps:
      - uses: coffey-labs/actions/checkout@fab0c4d45e0162963965f1555df27b7bed5e20ec
      - run: cargo test --locked

  # Stands in for test and release while GitHub builds: waits for the status
  # GitHub's ci.yml posts on this commit and passes or fails with it. A pull
  # request is checked at its head commit, which is what GitHub built when
  # the branch reached the mirror. Two and a half hours covers a slow queue;
  # a timeout here with BUILD_ON=github usually means GitHub never got the
  # push -- check the mirror's last error in the repository settings.
  github:
    if: ${{ vars.BUILD_ON == 'github' }}
    # Its own runner label with plenty of slots: this job only polls, but holds a slot
    # for as long as the GitHub build takes, and must not starve the build runners.
    runs-on: wait
    timeout-minutes: 150
    container:
      image: rust:1-bookworm@sha256:93ce27a88655056a51dbdd8f5f2d7ddc071c7b0070fb288a37b5a285fc83971e # 1-bookworm
    steps:
      - shell: bash
        env:
          TOKEN: ${{ secrets.GITHUB_TOKEN }}
          REPO: ${{ github.repository }}
          SHA: ${{ github.event.pull_request.head.sha || github.sha }}
          IS_TAG: ${{ startsWith(github.ref, 'refs/tags/') }}
        run: |
          set -euo pipefail
          apt-get update -qq && apt-get install -y -qq --no-install-recommends jq >/dev/null
          ctx="github/ci (branch)"; [ "$IS_TAG" = true ] && ctx="github/ci (tag)"
          echo "waiting for '$ctx' on $SHA"
          while :; do
            s="$(curl -fsS -H "Authorization: token $TOKEN" \
                  "$CI_SERVER_INTERNAL/api/v1/repos/$REPO/commits/$SHA/statuses?limit=50" \
                  | jq -c --arg c "$ctx" '[.[] | select(.context == $c)] | sort_by(.id) | last // empty')" || s=""
            state="$(printf '%s' "$s" | jq -r '.status // .state // empty')"
            case "$state" in
              success) echo "GitHub: success"; exit 0 ;;
              failure|error) echo "GitHub: $state -- $(jq -r '.target_url' <<<"$s")"; exit 1 ;;
            esac
            sleep 20
          done

  # GitHub makes the Release and publishes it only once its files are
  # attached; this waits for GitHub's success and announces then. The action
  # makes one topic per tag, so announce.yml firing for the same Release is a
  # no-op.
  announce:
    needs: [github]
    if: ${{ startsWith(github.ref, 'refs/tags/v') && needs.github.result == 'success' }}
    runs-on: light
    steps:
      - uses: coffey-labs/actions/discourse-release@baedbb0e89336e49dd5105a22f8ea4f712b453ad
        with:
          api-key: ${{ secrets.DISCOURSE_RELEASE_KEY }}
          discord-webhook: ${{ secrets.DISCORD_RELEASE_WEBHOOK }}
          tag: ${{ github.ref_name }}