# ── Publish an installable bundle (GitHub Actions) ────────────────────────
#
# The GitHub twin of `.gitea/workflows/release.yml`. **Keep whichever host your
# module lives on and delete the other** — nothing breaks if both are present,
# but two release engines racing to tag the same version is a mess nobody needs.
#
# **This file does nothing where it sits.** Workflows run only from the
# REPOSITORY root, and inside the kit this one is at `template/.github/…`. It arms
# itself the moment your copy of `template/` is a repository of its own.
#
# Nothing about a module's release depends on where it is hosted: core installs
# from a **URL**. Point Admin → Modules at the install manifest this job attaches
# to the release and add your host to the website's `MODULE_SOURCE_HOSTS`
# allowlist, and a module released here installs exactly like one released
# anywhere else.
#
# ── What a release IS ─────────────────────────────────────────────────────
#
# **An operator never builds anything.** So a release is not source: it is the
# directory core's loader expects to find at `modules/<id>/`, already assembled —
# the prebuilt client chunk, any runtime dependency installed, the schema fragment
# and the OpenAPI fragment — packed exactly as it will be unpacked. The website
# downloads the tarball, verifies it against the `sha256` in the manifest, and
# unpacks it onto the volume. Nothing runs `npm` on the way.
#
# ── The version is DECLARED, not derived ──────────────────────────────────
#
# Your module already has one authoritative version: `module.json`'s. It is what
# core records in `installed_modules` and what the admin screen shows. Two sources
# for one number is how they drift — so **a release happens when a push to `main`
# leaves `module.json` at a version that has no release yet.** Bumping the version
# is an ordinary reviewed pull request; publishing is this file's business.
#
# This workflow never writes to a branch, so a protected `main` needs no push
# exception. Re-running on an already-released version is a no-op.
#
# ── Before this can run ───────────────────────────────────────────────────
#
# Nothing to configure. `GITHUB_TOKEN` is provided automatically; the `contents:
# write` permission below is what lets it push a tag and create a release.

name: Release

on:
  push:
    branches: [main]

permissions:
  contents: write

concurrency:
  group: release-module
  cancel-in-progress: false

jobs:
  release:
    runs-on: ubuntu-latest
    timeout-minutes: 30
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - uses: actions/setup-node@v4
        with:
          node-version: 20

      - name: Decide whether this commit releases
        id: plan
        env:
          GH_TOKEN: ${{ github.token }}
        run: |
          set -euo pipefail
          ID="$(node -p "require('./module.json').id")"
          VERSION="$(node -p "require('./module.json').version")"
          echo "module.json: ${ID} ${VERSION}"

          # `gh release view` exits non-zero when the release does not exist — but
          # it also exits non-zero when the API is unreachable, and those two are
          # not the same answer. Ask for the status code instead: 404 means no,
          # 200 means yes, anything else is not evidence of absence, and guessing
          # "no" would publish over a good release.
          HTTP="$(curl -s -o /dev/null -w '%{http_code}' \
            -H "Authorization: Bearer ${GH_TOKEN}" \
            -H "Accept: application/vnd.github+json" \
            "${GITHUB_API_URL}/repos/${GITHUB_REPOSITORY}/releases/tags/v${VERSION}" || echo 000)"

          case "$HTTP" in
            404) RELEASE=true ;;
            200) RELEASE=false; echo "v${VERSION} is already released — nothing to do." ;;
            *)   echo "::error::Could not determine whether v${VERSION} is released (HTTP ${HTTP}). Refusing to guess."; exit 1 ;;
          esac

          echo "id=${ID}"           >> "$GITHUB_OUTPUT"
          echo "version=${VERSION}" >> "$GITHUB_OUTPUT"
          echo "tag=v${VERSION}"    >> "$GITHUB_OUTPUT"
          echo "release=${RELEASE}" >> "$GITHUB_OUTPUT"

      - name: Build the client chunk
        if: ${{ steps.plan.outputs.release == 'true' }}
        run: |
          npm ci --prefix client
          npm run build --prefix client

      # `--omit=dev`, and then PACKED. express and swagger-autogen are build- and
      # test-time only — the shipped half is handed express on `ctx` — so this
      # installs only what `dependencies` declares. Node resolves those by walking
      # up from `modules/<id>/server/`, which is why they ship INSIDE the tarball
      # rather than being installed on the operator's box.
      #
      # With no runtime dependencies at all this produces an empty tree and the
      # copy below is a no-op. That is the shape to aim for.
      - name: Install the shipped runtime dependencies
        if: ${{ steps.plan.outputs.release == 'true' }}
        run: npm ci --omit=dev --prefix server

      # ── Assemble exactly what an operator's volume gets ──────────────────
      #
      # Stated as an INCLUDE list, never an exclude list. An exclude list ships
      # whatever it forgot: the day someone adds `server/tools/` with a scratch
      # credential in it, an exclude list packs it and nobody finds out.
      - name: Assemble the bundle
        if: ${{ steps.plan.outputs.release == 'true' }}
        run: |
          set -euo pipefail
          ID="${{ steps.plan.outputs.id }}"
          VERSION="${{ steps.plan.outputs.version }}"
          OUT="dist/${ID}-${VERSION}"
          rm -rf dist && mkdir -p "$OUT"

          # The manifest core reads, the OpenAPI fragment, and the licence the
          # code is under — a bundle shipping GPL code without its licence is not
          # distributable.
          cp module.json swagger-fragment.json LICENSE.md README.md "$OUT/"

          # The server half, minus everything that never runs inside core's
          # process: no `test/`, no `scripts/`, no `swagger/`.
          mkdir -p "$OUT/server"
          for d in boot.js core.js index.js db model router; do
            cp -r "server/$d" "$OUT/server/"
          done
          cp server/package.json "$OUT/server/"
          [ -d server/node_modules ] && cp -r server/node_modules "$OUT/server/" || true

          # The client half is the BUILT chunk only.
          mkdir -p "$OUT/client/dist"
          cp client/dist/entry.js "$OUT/client/dist/"

          # Prove the bundle is loadable before publishing it: these are the exact
          # paths core's loader resolves out of module.json. A release whose entry
          # point is missing otherwise fails on an operator's box, as a
          # `startup_failed` row, instead of here.
          node -e '
            const fs = require("fs"), path = require("path");
            const root = process.argv[1];
            const m = JSON.parse(fs.readFileSync(path.join(root, "module.json"), "utf8"));
            for (const p of [m.server, m.schema, m.purge, m.client && m.client.entry, "swagger-fragment.json"]) {
              if (!p) continue;
              if (!fs.existsSync(path.join(root, p))) { console.error("bundle is missing " + p); process.exit(1); }
            }
            console.log("bundle contents check: ok");
          ' "$OUT"

          tar -C dist -czf "dist/${ID}-${VERSION}.tar.gz" "${ID}-${VERSION}"
          rm -rf "$OUT"

          SHA="$(sha256sum "dist/${ID}-${VERSION}.tar.gz" | cut -d' ' -f1)"
          SIZE="$(stat -c%s "dist/${ID}-${VERSION}.tar.gz")"

          # The install manifest — the URL an operator pastes into Admin →
          # Modules. A per-asset sha256 fetched over HTTPS, no signatures.
          jq -n \
            --arg id "$ID" \
            --arg name "$(node -p "require('./module.json').name")" \
            --arg version "$VERSION" \
            --arg coreApi "$(node -p "require('./module.json').coreApi")" \
            --arg artifact "${ID}-${VERSION}.tar.gz" \
            --arg sha256 "$SHA" \
            --argjson size "$SIZE" \
            --arg url "${GITHUB_SERVER_URL}/${GITHUB_REPOSITORY}/releases/download/v${VERSION}/${ID}-${VERSION}.tar.gz" \
            '{schema:1, id:$id, name:$name, version:$version, coreApi:$coreApi,
              artifact:$artifact, url:$url, sha256:$sha256, size:$size}' \
            > "dist/${ID}-${VERSION}.json"

          echo "${SHA}  ${ID}-${VERSION}.tar.gz" > dist/SHA256SUMS
          cat "dist/${ID}-${VERSION}.json"

      - name: Write the changelog
        if: ${{ steps.plan.outputs.release == 'true' }}
        run: |
          set -euo pipefail
          ID="${{ steps.plan.outputs.id }}"
          VERSION="${{ steps.plan.outputs.version }}"
          LAST_TAG="$(git describe --tags --match 'v*' --abbrev=0 2>/dev/null || true)"
          RANGE="${LAST_TAG:+${LAST_TAG}..}HEAD"
          {
            echo "## ${ID} v${VERSION}"
            echo
            echo "Install from the website's Admin → Modules screen by pasting the URL of"
            echo "\`${ID}-${VERSION}.json\`, or unpack the tarball onto the modules volume as"
            echo "\`modules/${ID}/\`. Requires a core whose \`MODULE_API_VERSION\` satisfies"
            echo "\`$(node -p "require('./module.json').coreApi")\`."
            echo
            echo "The website only installs from hosts on its \`MODULE_SOURCE_HOSTS\` allowlist —"
            echo "an operator installing this needs \`github.com\` on theirs."
            echo
            echo "### Changes"
            if [ -n "$LAST_TAG" ]; then echo "Since ${LAST_TAG}:"; fi
            git log --no-merges --format='- %s' $RANGE || true
            echo
            echo "### Verifying this download"
            echo
            echo "Releases are **unsigned** — the \`sha256\` in \`${ID}-${VERSION}.json\` is the"
            echo "trust anchor, and the website verifies it before unpacking."
            echo
            echo '```bash'
            echo "sha256sum -c SHA256SUMS --ignore-missing"
            echo '```'
          } > dist/CHANGELOG.md

      - name: Tag and publish
        if: ${{ steps.plan.outputs.release == 'true' }}
        env:
          GH_TOKEN: ${{ github.token }}
        run: |
          set -euo pipefail
          ID="${{ steps.plan.outputs.id }}"
          TAG="${{ steps.plan.outputs.tag }}"
          VERSION="${{ steps.plan.outputs.version }}"

          git config user.name  'github-actions[bot]'
          git config user.email 'github-actions[bot]@users.noreply.github.com'
          git tag -a "$TAG" -m "${ID} ${TAG}"
          git push origin "$TAG"

          gh release create "$TAG" \
            --title "$TAG" \
            --notes-file dist/CHANGELOG.md \
            "dist/${ID}-${VERSION}.tar.gz" \
            "dist/${ID}-${VERSION}.json" \
            dist/SHA256SUMS