name: Release

# Checkout, interpolation and caching conventions match ci.yaml -- see the header there
# for why there are no JS actions and why every `${{ }}` goes through `env:`.
#
# There is no upload-artifact/download-artifact equivalent here (both are JS actions, and
# this Gitea has no artifact store wired up), so the job that builds the binaries is also
# the job that publishes them. Nothing is handed between jobs.
#
# The asset names matter beyond being tidy: internal/updater looks for exactly
# terdut-tui-<tag>-<goos>-<goarch> in the latest release and reports every available name
# when it cannot find one. Renaming the pattern here breaks self-update for every
# installed binary.
on:
  push:
    tags:
      - 'v*'
  workflow_dispatch:

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

env:
  REPO_URL: https://git.ryuvia.com/niklas/terdut-tui.git
  API: https://git.ryuvia.com/api/v1/repos/niklas/terdut-tui

jobs:
  # Gates the build, so a tag that fails here publishes no binaries.
  test:
    runs-on: ubuntu-latest
    container:
      image: golang:1.26.6-bookworm
      volumes:
        - go-mod-cache:/go/pkg/mod
        - go-build-cache:/root/.cache/go-build
        - gobin-cache:/go/bin
    steps:
      - name: Checkout
        env:
          REF_NAME: ${{ github.ref_name }}
        run: git clone --depth=1 --branch "$REF_NAME" "$REPO_URL" .

      # This exists because `go vet` does not look at import order: the move to
      # git.ryuvia.com rewrote every import path without re-sorting, the new path sorts
      # before github.com/..., and both repos sat unformatted through a green CI run and
      # a release before anyone noticed.
      #
      # Both of gofmt's failure modes need handling, and they are not alike. A file that
      # is merely misformatted is listed on stdout with exit 0 -- so the failure has to
      # be raised by hand. A file that does not parse is the opposite: nothing on stdout
      # and exit 2, which a naive `[ -n "$unformatted" ]` reads as success. The first
      # draft of this step had exactly that hole.
      - name: Format
        run: |
          if ! unformatted=$(gofmt -l .); then
            echo "::error::gofmt could not parse the tree"
            gofmt -l .    # re-run unredirected so the parse errors reach the log
            exit 1
          fi
          if [ -n "$unformatted" ]; then
            echo "::error::not gofmt'd:"
            echo "$unformatted"
            gofmt -d .
            exit 1
          fi

      - name: Vet
        run: go vet ./...

      - name: Test
        run: go test ./...

  binaries:
    needs: test
    runs-on: ubuntu-latest
    container:
      image: golang:1.26.6-bookworm
      volumes:
        - go-mod-cache:/go/pkg/mod
        - go-build-cache:/root/.cache/go-build
        - gobin-cache:/go/bin
    steps:
      - name: Checkout
        env:
          REF_NAME: ${{ github.ref_name }}
        run: git clone --depth=1 --branch "$REF_NAME" "$REPO_URL" .

      - name: Build every target
        env:
          REF_NAME: ${{ github.ref_name }}
        run: |
          set -eu
          mkdir -p dist
          for target in linux/amd64 linux/arm64 darwin/amd64 darwin/arm64; do
            GOOS="${target%/*}"
            GOARCH="${target#*/}"
            out="dist/terdut-tui-${REF_NAME}-${GOOS}-${GOARCH}"
            echo "building $out"
            GOOS="$GOOS" GOARCH="$GOARCH" go build \
              -ldflags "-X main.version=${REF_NAME}" \
              -o "$out" .
          done

      # Creating the release is made idempotent rather than assumed-new: a re-run of a
      # failed release must not die on the release that already exists. Assets are
      # replaced the same way, so a re-run repairs a partial upload.
      - name: Publish the release
        env:
          REF_NAME: ${{ github.ref_name }}
          TOKEN: ${{ secrets.REGISTRY_TOKEN }}
        run: |
          set -eu
          auth="Authorization: token $TOKEN"

          body=$(curl -sf -H "$auth" "$API/releases/tags/$REF_NAME" || true)
          if [ -z "$body" ]; then
            body=$(curl -sf -X POST -H "$auth" -H 'Content-Type: application/json' \
              -d "{\"tag_name\":\"$REF_NAME\",\"name\":\"$REF_NAME\"}" \
              "$API/releases")
          fi

          # The release object serialises `id` first, so the first match is the release's
          # own id and not one of the nested author/asset ids.
          release_id=$(printf '%s' "$body" | grep -o '"id":[0-9]*' | head -1 | cut -d: -f2)
          [ -n "$release_id" ] || { echo "::error::could not determine release id"; exit 1; }
          echo "release id $release_id"

          # The release notes are the tag's own message, minus its subject line: the
          # tag body is the changelog for this project, and without this the release
          # page stays empty. Only an annotated tag has one, and only a release with
          # no notes is filled, so a re-run repairs a release created empty without
          # overwriting notes somebody has since edited by hand.
          #
          # There is no jq in this image, so the JSON string is escaped by hand:
          # backslashes first (or the ones added next would double), then quotes and
          # tabs, then each line end becomes a literal \n.
          if [ "$(git cat-file -t "$REF_NAME")" = tag ] \
             && printf '%s' "$body" | grep -q '"body":""'; then
            notes=$(git tag -l --format='%(contents)' "$REF_NAME" | sed '1,2d')
            if [ -n "$notes" ]; then
              notes_json=$(printf '%s\n' "$notes" \
                | sed -e 's/\\/\\\\/g' -e 's/"/\\"/g' -e 's/\t/\\t/g' -e 's/\r$//' \
                | awk 'BEGIN { ORS = "\\n" } { print }')
              echo "setting release notes from the tag message"
              curl -sf -X PATCH -H "$auth" -H 'Content-Type: application/json' \
                -d "{\"body\":\"$notes_json\"}" "$API/releases/$release_id" > /dev/null
            fi
          fi

          for f in dist/*; do
            name=$(basename "$f")
            # Drop an existing asset of the same name first: Gitea happily stores two
            # attachments with one name, and the updater matches by name.
            old=$(curl -sf -H "$auth" "$API/releases/$release_id/assets" \
                  | tr '}' '\n' | grep "\"name\":\"$name\"" \
                  | grep -o '"id":[0-9]*' | head -1 | cut -d: -f2 || true)
            if [ -n "$old" ]; then
              curl -sf -X DELETE -H "$auth" "$API/releases/$release_id/assets/$old" || true
            fi
            echo "uploading $name"
            curl -sf -X POST -H "$auth" -F "attachment=@$f" \
              "$API/releases/$release_id/assets?name=$name" > /dev/null
          done