# CI and publishing on GitHub, for the repository Gitea mirrors here.
#
# Gitea (git.coffeylabs.org) is where this project lives: pull requests,
# issues, releases and the container registry are all there, and it pushes
# every branch and tag to this GitHub copy as it changes. GitHub's hosted
# runners are faster than the self-hosted ones -- and have native arm64 -- so
# the building happens here, and the answer goes back to Gitea as a commit
# status that Gitea's own ci.yml / publish.yml wait on.
#
# One switch decides which side builds: the Actions variable BUILD_ON, set on
# both forges. BUILD_ON=github runs every job below and turns Gitea's heavy
# jobs into a wait for this one; anything else leaves Gitea building exactly
# as before and every job here skips. If GitHub is ever unavailable, unset it
# on Gitea and nothing else has to change.
#
# Needs, as organization settings rather than anything in this file:
#   variables  BUILD_ON=github, REGISTRY (the Gitea container registry),
#              GITEA_URL (the Gitea base URL)
#   secret     GITEA_TOKEN -- jcoffey-dev, write:repository + write:package:
#              commit statuses, the release and its assets, the registry push
#
# There is no pull_request trigger: pull requests happen on Gitea, and their
# branch arrives here as an ordinary push. Branch pushes get what Gitea's
# ci.yml checks; v* tags get what its publish.yml does. Schedules (the weekly
# release, the upstream watch) and the release announcement stay on Gitea.
#
# Every `uses:` is pinned to a full commit SHA with the release in the
# trailing comment. A tag is a mutable pointer; do not "simplify" a pin back
# to one. Only GitHub's own actions and the three docker/* ones are used.
name: ci

on:
  push:
    branches: ['**']
    tags: ['**']
  workflow_dispatch:

# A newer push to a branch cancels the run for the older one, whose answer is
# about code nobody is looking at any more. A tag run is never cancelled: it
# publishes.
concurrency:
  group: ci-${{ github.ref }}
  cancel-in-progress: ${{ github.ref_type == 'branch' }}

permissions:
  contents: read

env:
  GITEA_URL: ${{ vars.GITEA_URL }}
  # The Gitea status this run answers for. Gitea waits on the one matching
  # its own event: "(branch)" from ci.yml, "(tag)" from publish.yml.
  STATUS_CONTEXT: github/ci (${{ github.ref_type }})

jobs:
  # Tells Gitea a run has started, so a pull request shows it as pending
  # rather than missing while the build is still going.
  start:
    if: ${{ vars.BUILD_ON == 'github' }}
    runs-on: ubuntu-latest
    steps:
      - env:
          GITEA_TOKEN: ${{ secrets.GITEA_TOKEN }}
        run: |
          jq -n --arg c "$STATUS_CONTEXT" \
                --arg u "$GITHUB_SERVER_URL/$GITHUB_REPOSITORY/actions/runs/$GITHUB_RUN_ID" \
                '{state:"pending", context:$c, target_url:$u, description:"GitHub Actions"}' |
          curl -fsS -o /dev/null -X POST -H "Authorization: token $GITEA_TOKEN" \
               -H 'Content-Type: application/json' --data @- \
               "$GITEA_URL/api/v1/repos/$GITHUB_REPOSITORY/statuses/$GITHUB_SHA"

  # ----------------------------------------------------------- branches ------
  # What an upstream merge can bring in or leave behind without a conflict:
  # the upstream name in a new string literal, and a changed upstream file
  # without the AGPL 5(a) notice. Seconds, and needs no toolchain. The notice
  # check diffs against the upstream snapshot in the history, hence the full
  # fetch.
  fork-checks:
    if: ${{ vars.BUILD_ON == 'github' && github.ref_type == 'branch' }}
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
        with:
          fetch-depth: 0
      - run: python3 tools/fork/name-check.py
      - if: always()
        run: python3 tools/fork/notice-check.py
      # Cargo can patch a dependency to a directory in this repository, and
      # the image builds from a context .dockerignore prunes to almost
      # nothing. CI never sees the difference; a release does.
      - if: always()
        run: python3 tools/fork/context-check.py
      # The personal-data catalog must classify every object and field the
      # schema has, and name nothing that is gone.
      - if: always()
        run: python3 tools/fork/privacy-check.py
      # The admin reads each expression field's allowed values and variables
      # from the schema; they're generated from the registry and must match it.
      - if: always()
        run: python3 tools/fork/expr-schema.py --check
      - if: always()
        run: python3 -m unittest discover -s tools/fork/tests

  # The build, and that every test target compiles. The suites are not run:
  # they need a store, fixed ports and containers (docs/spec/
  # container-tests.md), and are run by hand.
  build:
    if: ${{ vars.BUILD_ON == 'github' && github.ref_type == 'branch' }}
    runs-on: ubuntu-latest
    env:
      CARGO_INCREMENTAL: "0"
      # Debug info is most of a dev target dir, and nothing here runs a
      # debugger. Without it the dev and test builds fit the runner's disk and
      # the cache below stays small enough to be worth restoring.
      CARGO_PROFILE_DEV_DEBUG: "0"
      CARGO_PROFILE_TEST_DEBUG: "0"
    steps:
      # The hosted image carries toolchains this build never touches; a dev,
      # test and release build of RocksDB and the workspace needs the room.
      - run: |
          sudo rm -rf /usr/share/dotnet /usr/local/lib/android /opt/ghc /opt/hostedtoolcache/CodeQL
          df -h /
      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
      # Current stable, as Gitea's rust:1 image is.
      - id: rust
        run: |
          rustup toolchain install stable --profile minimal
          rustup default stable
          echo "version=$(rustc -V | cut -d' ' -f2)" >> "$GITHUB_OUTPUT"
      - run: sudo apt-get update -qq && sudo apt-get install -y -qq --no-install-recommends clang >/dev/null
      # Cargo's download cache and the dev/test target dir, keyed on the
      # lockfile and the compiler. Saved from main only, so the one cache
      # every branch restores is main's, and branches cannot evict it.
      - uses: actions/cache/restore@55cc8345863c7cc4c66a329aec7e433d2d1c52a9 # v6.1.0
        with:
          path: |
            ~/.cargo/registry/index
            ~/.cargo/registry/cache
            ~/.cargo/git/db
            target/debug
          key: cargo-${{ steps.rust.outputs.version }}-${{ hashFiles('Cargo.lock') }}
          restore-keys: cargo-${{ steps.rust.outputs.version }}-
      - run: cargo build -p inbuxa --locked
      # --no-run: compiles every test target without running them, which
      # catches a test that no longer builds without needing a store.
      - run: cargo test --workspace --locked --no-run
      - if: github.ref == 'refs/heads/main'
        uses: actions/cache/save@55cc8345863c7cc4c66a329aec7e433d2d1c52a9 # v6.1.0
        with:
          path: |
            ~/.cargo/registry/index
            ~/.cargo/registry/cache
            ~/.cargo/git/db
            target/debug
          key: cargo-${{ steps.rust.outputs.version }}-${{ hashFiles('Cargo.lock') }}
      # The release profile, on main only. It is the profile the image is
      # built with, and it fails in ways the dev profile does not: v2026.9.24
      # was tagged on a commit whose CI was green and whose release build
      # could not compile the scim crate at all.
      - if: github.ref == 'refs/heads/main'
        run: cargo build -p inbuxa --locked --release

  # --------------------------------------------------------------- tags ------
  # Two guards before anything is pushed, the same as Gitea's publish.yml:
  #   * the tag must be v<brand_version!>. The version is a string in
  #     crates/types/src/branding.rs, not Cargo.toml, and the image is tagged
  #     with it, so a tag beside an unbumped macro would publish an image that
  #     reports a different version from its tag.
  #   * the tag must be on main or on a release/* branch, so an image never
  #     describes code that was never reviewed onto one of them. A release/*
  #     branch carries a hotfix cut from an earlier release tag.
  version:
    if: ${{ vars.BUILD_ON == 'github' && github.ref_type == 'tag' && startsWith(github.ref_name, 'v') }}
    runs-on: ubuntu-latest
    outputs:
      version: ${{ steps.v.outputs.version }}
    steps:
      # Full history, and every branch as origin/*: the ancestry check cannot
      # be answered from a shallow clone.
      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
        with:
          fetch-depth: 0
      - id: v
        env:
          TAG: ${{ github.ref_name }}
        run: |
          set -euo pipefail
          # Scoped to the macro body: branding.rs holds other string literals,
          # and tagging an image from one of those would be worse than failing.
          V="$(awk '/macro_rules! brand_version /,/^}/' crates/types/src/branding.rs \
               | grep -om1 '"[0-9][^"]*"' | tr -d '"')"
          [ -n "$V" ] || { echo "could not read brand_version! from branding.rs" >&2; exit 1; }
          if [ "$TAG" != "v$V" ]; then
            echo "Tag $TAG names a commit whose brand_version! says $V." >&2
            echo "Refusing to publish an image that would report the wrong version." >&2
            exit 1
          fi
          commit="$(git rev-parse "${TAG}^{commit}")"
          on=""
          for ref in origin/main $(git for-each-ref --format='%(refname:short)' 'refs/remotes/origin/release/*'); do
            if git merge-base --is-ancestor "$commit" "$ref"; then on="$ref"; break; fi
          done
          [ -n "$on" ] || { echo "$TAG is not on main or a release/* branch" >&2; exit 1; }
          echo "$TAG is on $on"
          echo "version=$V" >> "$GITHUB_OUTPUT"

  # Each architecture on its own native runner, side by side. The Dockerfile
  # cross-compiles from the build platform, and on the self-hosted runners one
  # machine built both one after the other; here two machines build at once,
  # each natively (the builder stage picks the matching target, and the
  # aarch64 toolchain it installs exists on arm64 too), and the small final
  # stage needs no QEMU. amd64 also moves :<version> as soon as it is done, so
  # a production deploy can start from it; :latest waits for the index below,
  # so it never names an image without arm64.
  publish:
    needs: [version]
    runs-on: ${{ matrix.runner }}
    strategy:
      fail-fast: false
      matrix:
        include:
          - arch: amd64
            runner: ubuntu-latest
          - arch: arm64
            runner: ubuntu-24.04-arm
    env:
      VERSION: ${{ needs.version.outputs.version }}
    steps:
      - run: |
          sudo rm -rf /usr/share/dotnet /usr/local/lib/android /opt/ghc /opt/hostedtoolcache/CodeQL
          echo "IMAGE=${{ vars.REGISTRY }}/${GITHUB_REPOSITORY,,}" >> "$GITHUB_ENV"
      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
      - uses: docker/setup-buildx-action@594f3bf4285d9ea8dc53c9a0c9c4092420091003 # v4.4.0
      - uses: docker/login-action@dbcb813823bdd20940b903addbd779551569679f # v4.6.0
        with:
          registry: ${{ vars.REGISTRY }}
          username: jcoffey-dev
          password: ${{ secrets.GITEA_TOKEN }}
      # Attestations off: they add manifests of their own, and the index
      # should hold the two images and nothing else. The GitHub Actions cache
      # keeps the dependency layer (`cargo chef cook`), which only a
      # dependency change alters, between releases.
      - uses: docker/build-push-action@c3c9e263c25d99ce0380d002d59b67737d91b0dc # v7.4.0
        with:
          context: .
          platforms: linux/${{ matrix.arch }}
          provenance: false
          sbom: false
          cache-from: type=gha,scope=image-${{ matrix.arch }}
          cache-to: type=gha,mode=max,scope=image-${{ matrix.arch }}
          push: true
          tags: |
            ${{ env.IMAGE }}:${{ env.VERSION }}-${{ matrix.arch }}
            ${{ matrix.arch == 'amd64' && format('{0}:{1}', env.IMAGE, env.VERSION) || '' }}

  # Joins the two per-architecture tags into :<version> and :latest. Built
  # from the per-architecture tags rather than :<version>, which by now is
  # the amd64 image and would be read as such.
  index:
    needs: [version, publish]
    runs-on: ubuntu-latest
    env:
      VERSION: ${{ needs.version.outputs.version }}
    steps:
      - run: echo "IMAGE=${{ vars.REGISTRY }}/${GITHUB_REPOSITORY,,}" >> "$GITHUB_ENV"
      - uses: docker/setup-buildx-action@594f3bf4285d9ea8dc53c9a0c9c4092420091003 # v4.4.0
      - uses: docker/login-action@dbcb813823bdd20940b903addbd779551569679f # v4.6.0
        with:
          registry: ${{ vars.REGISTRY }}
          username: jcoffey-dev
          password: ${{ secrets.GITEA_TOKEN }}
      - run: |
          docker buildx imagetools create \
            --tag "$IMAGE:$VERSION" \
            --tag "$IMAGE:latest" \
            "$IMAGE:$VERSION-amd64" "$IMAGE:$VERSION-arm64"
          docker buildx imagetools inspect "$IMAGE:$VERSION"
      # Gitea keeps a container package on its owner; linking it shows it on
      # the repository's Packages tab. Idempotent.
      - env:
          GITEA_TOKEN: ${{ secrets.GITEA_TOKEN }}
        run: |
          owner="${GITHUB_REPOSITORY%%/*}"; name="${GITHUB_REPOSITORY#*/}"
          curl -fsS -o /dev/null -X POST -H "Authorization: token $GITEA_TOKEN" \
            "$GITEA_URL/api/v1/packages/${owner,,}/container/$name/-/link/$name" \
            || echo "package already linked (or link refused); not fatal"

  # The weekly release creates its Release (and so the tag) on Gitea first; a
  # tag pushed by hand has none. Either way the tag ends up with exactly one
  # Release there, created once the image exists so its pull instructions
  # work.
  release:
    needs: [version, index]
    runs-on: ubuntu-latest
    steps:
      - env:
          TAG: ${{ github.ref_name }}
          VERSION: ${{ needs.version.outputs.version }}
          GITEA_TOKEN: ${{ secrets.GITEA_TOKEN }}
          REGISTRY: ${{ vars.REGISTRY }}
        run: |
          set -euo pipefail
          api="$GITEA_URL/api/v1/repos/$GITHUB_REPOSITORY"
          code="$(curl -sS -o /dev/null -w '%{http_code}' -H "Authorization: token $GITEA_TOKEN" "$api/releases/tags/$TAG")"
          if [ "$code" = 200 ]; then echo "$TAG already has a release"; exit 0; fi
          [ "$code" = 404 ] || { echo "looking up the release for $TAG answered $code" >&2; exit 1; }
          image="$REGISTRY/${GITHUB_REPOSITORY,,}:$VERSION"
          body="Container image: \`$image\` (linux/amd64, linux/arm64); also \`:latest\`.

          Binaries for a host install are attached: \`inbuxa-linux-amd64.tar.gz\` and \`inbuxa-linux-arm64.tar.gz\`, with \`SHA256SUMS\`. Each is the binary out of this release's image for that architecture, so it is the same build. The image grants it \`cap_net_bind_service\`; a host install has to grant that itself (\`setcap\`, or \`AmbientCapabilities\` in the unit) to bind port 25."
          jq -n --arg tag "$TAG" --arg name "INBUXA $VERSION" --arg body "$body" \
                '{tag_name:$tag, name:$name, body:$body}' |
          curl -fsS -X POST -H "Authorization: token $GITEA_TOKEN" -H 'Content-Type: application/json' \
               --data @- "$api/releases" | jq -r '"created release " + .tag_name'

  # The binaries for a host install, taken out of the image that was just
  # pushed rather than compiled again: the binary in the tarball is the file
  # the image runs. `docker create` starts nothing, so copying a file out of
  # the arm64 image on an amd64 runner needs no emulation.
  binaries:
    needs: [version, index, release]
    runs-on: ubuntu-latest
    env:
      VERSION: ${{ needs.version.outputs.version }}
      TAG: ${{ github.ref_name }}
      GITEA_TOKEN: ${{ secrets.GITEA_TOKEN }}
    steps:
      - run: echo "IMAGE=${{ vars.REGISTRY }}/${GITHUB_REPOSITORY,,}" >> "$GITHUB_ENV"
      - uses: docker/login-action@dbcb813823bdd20940b903addbd779551569679f # v4.6.0
        with:
          registry: ${{ vars.REGISTRY }}
          username: jcoffey-dev
          password: ${{ secrets.GITEA_TOKEN }}
      - name: take the binaries out of the image
        run: |
          set -euo pipefail
          mkdir -p out && cd out
          for arch in amd64 arm64; do
            docker pull -q --platform "linux/$arch" "$IMAGE:$VERSION"
            id="$(docker create --platform "linux/$arch" "$IMAGE:$VERSION")"
            docker cp "$id:/usr/local/bin/inbuxa" inbuxa
            docker rm -f "$id" >/dev/null
            chmod 0755 inbuxa
            tar -czf "inbuxa-linux-$arch.tar.gz" inbuxa
            rm inbuxa
          done
          sha256sum inbuxa-linux-*.tar.gz > SHA256SUMS
          cat SHA256SUMS
      # A re-run of a tag replaces its assets rather than leaving two files
      # with the same name and different contents.
      - name: attach them to the release
        run: |
          set -euo pipefail
          api="$GITEA_URL/api/v1/repos/$GITHUB_REPOSITORY"
          auth="Authorization: token $GITEA_TOKEN"
          rel="$(curl -fsS -H "$auth" "$api/releases/tags/$TAG" | jq -r .id)"
          assets="$(curl -fsS -H "$auth" "$api/releases/$rel/assets")"
          for f in out/inbuxa-linux-amd64.tar.gz out/inbuxa-linux-arm64.tar.gz out/SHA256SUMS; do
            name="$(basename "$f")"
            old="$(jq -r --arg n "$name" '.[] | select(.name == $n) | .id' <<<"$assets")"
            for id in $old; do curl -fsS -o /dev/null -X DELETE -H "$auth" "$api/releases/$rel/assets/$id"; done
            curl -fsS -o /dev/null -X POST -H "$auth" -F "attachment=@$f" "$api/releases/$rel/assets?name=$name"
            echo "attached $name"
          done

  # ------------------------------------------------------------- report ------
  # One commit status on Gitea for the whole run: what Gitea's ci.yml and
  # publish.yml wait on. Skipped jobs (the tag jobs on a branch, and the other
  # way round) count as passing; a failed or cancelled one does not.
  report:
    if: ${{ always() && vars.BUILD_ON == 'github' }}
    needs: [start, fork-checks, build, version, publish, index, release, binaries]
    runs-on: ubuntu-latest
    steps:
      - env:
          GITEA_TOKEN: ${{ secrets.GITEA_TOKEN }}
          STATE: ${{ contains(needs.*.result, 'failure') && 'failure' || (contains(needs.*.result, 'cancelled') && 'cancelled' || 'success') }}
        run: |
          # A cancelled run was superseded by a newer run for the same commit (the
          # mirror can push one commit twice); that run reports. Posting "failure"
          # here would fail the Gitea check while the real build is still going.
          if [ "$STATE" = cancelled ]; then echo "cancelled: leaving the result to the newer run"; exit 0; fi
          jq -n --arg s "$STATE" --arg c "$STATUS_CONTEXT" \
                --arg u "$GITHUB_SERVER_URL/$GITHUB_REPOSITORY/actions/runs/$GITHUB_RUN_ID" \
                '{state:$s, context:$c, target_url:$u, description:"GitHub Actions"}' |
          curl -fsS -o /dev/null -X POST -H "Authorization: token $GITEA_TOKEN" \
               -H 'Content-Type: application/json' --data @- \
               "$GITEA_URL/api/v1/repos/$GITHUB_REPOSITORY/statuses/$GITHUB_SHA"
          echo "$STATUS_CONTEXT: $STATE"