name: Docker

on:
  push:
    branches:
      - "master"
    tags:
      - "v*"
  # Manual builds so an unmerged ref can be previewed before it lands. This
  # publishes a SHA-tagged image and no `latest`/`v*` (release) tag — it is a
  # review image, not a release — and the deploy tooling accepts the resulting
  # `sha-<short>` tag as an ordinary app ref, so nothing downstream changes.
  # Deliberately not the release workflow: that one publishes a stable `v*`
  # release, a far bigger act than building a preview image.
  workflow_dispatch:
    inputs:
      ref:
        description: "Branch, tag, or commit SHA to build. Defaults to the ref this run was dispatched on."
        required: false
        type: string
        default: ""

permissions:
  contents: read
  packages: write

# Serialise builds per ref without killing an in-flight one: a newer push
# supersedes only the pending slot, so the image build that is already
# running always finishes and publishes.
concurrency:
  group: docker-${{ github.ref }}
  cancel-in-progress: false

jobs:
  build-and-push:
    runs-on: ubuntu-latest
    timeout-minutes: 60
    steps:
      - name: Checkout
        uses: actions/checkout@v7
        with:
          # push/tag builds resolve to github.sha — the checkout default, so
          # their behaviour is unchanged. A manual run may override it with the
          # `ref` input to build an unmerged branch, tag, or commit.
          ref: ${{ inputs.ref || github.sha }}
          # Full history and tags so `git describe` below can compute the
          # release version to stamp into the image.
          fetch-depth: 0

      # Pin every downstream reference to the exact commit that was checked
      # out. On push/tag builds this equals github.sha; on a manual run it is
      # the head of the `ref` input, which can differ from github.sha (the ref
      # the dispatch ran on). The SHA image tag and the commit stamped into the
      # image are both derived from this, so a manual build always tags the
      # commit it actually built.
      - name: Resolve build ref
        id: resolve-ref
        run: |
          set -euo pipefail
          sha="$(git rev-parse HEAD)"
          echo "sha=${sha}" >> "$GITHUB_OUTPUT"
          echo "short_sha=$(git rev-parse --short=7 HEAD)" >> "$GITHUB_OUTPUT"
          echo "Building ${GITHUB_REF} at ${sha}"

      # `.git` is dockerignored, so a running image cannot derive its own
      # version and otherwise reports the source package.json placeholder in
      # analytics and the debug panel. Compute it here from the pristine
      # checkout (real CalVer drift from the nearest release tag) and pass it
      # into both builds. Empty when no release tag is reachable — the server
      # then keeps its existing fallbacks.
      - name: Compute build version
        id: build-version
        run: |
          set -euo pipefail
          version="$(git describe --tags --match 'v*' --long --dirty 2>/dev/null || true)"
          echo "version=${version}" >> "$GITHUB_OUTPUT"
          echo "Stamping build version: ${version:-<none>}"

      # ISO week stamp for the Dockerfile's tool layer: the layer caches
      # across commits and re-pulls the @latest CLI tools when the week rolls
      # over, instead of on every build.
      - name: Compute tool cache epoch
        id: tools-epoch
        run: echo "epoch=$(date -u +%G-W%V)" >> "$GITHUB_OUTPUT"

      - name: Setup pnpm
        uses: pnpm/action-setup@v6
        with:
          version: 9.15.4
          run_install: false

      # No dependency cache here: this workflow publishes release images, and
      # restoring a shared Actions cache into the build inputs would let a
      # poisoned cache entry reach the published artifact.
      - name: Setup Node.js
        uses: actions/setup-node@v7
        with:
          node-version: 20

      - name: Refresh lockfile for Docker build context
        run: |
          set -euo pipefail
          pnpm install --lockfile-only --ignore-scripts --no-frozen-lockfile

          changed="$(git status --porcelain)"
          if [ -z "$changed" ]; then
            echo "Lockfile already matches package metadata."
            exit 0
          fi

          if printf '%s\n' "$changed" | grep -Fvq ' pnpm-lock.yaml'; then
            echo "Unexpected files changed during lockfile refresh:"
            echo "$changed"
            exit 1
          fi

          echo "Using refreshed pnpm-lock.yaml in the Docker build context."

      - name: Free runner disk
        run: |
          set -euo pipefail
          echo "Disk before cleanup:"
          df -h

          pnpm store prune || true
          sudo apt-get clean || true
          sudo rm -rf \
            /usr/share/dotnet \
            /usr/share/swift \
            /usr/local/lib/android \
            /usr/local/share/boost \
            /usr/local/share/powershell \
            /opt/ghc \
            /opt/hostedtoolcache/CodeQL \
            /opt/hostedtoolcache/PyPy \
            /opt/hostedtoolcache/Ruby || true
          docker system prune -af || true

          echo "Disk after cleanup:"
          df -h

      - name: Login to GitHub Container Registry
        uses: docker/login-action@v4
        with:
          registry: ghcr.io
          username: ${{ github.repository_owner }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v4

      # Deployment tooling reads these labels from the registry to verify an
      # image's schema expectations against a migrator before deploying it,
      # without pulling the image. The server refuses to start when the
      # database is missing bundled migrations, so orchestrators need a cheap
      # way to check image/migrator compatibility up front.
      - name: Compute schema migration labels
        id: schema
        run: |
          set -euo pipefail
          last=$(ls packages/db/src/migrations/*.sql | sed 's|.*/||' | LC_ALL=C sort | tail -1)
          count=$(ls packages/db/src/migrations/*.sql | wc -l | tr -d ' ')
          echo "last=${last}" >> "$GITHUB_OUTPUT"
          echo "count=${count}" >> "$GITHUB_OUTPUT"

      - name: Docker meta
        id: meta
        uses: docker/metadata-action@v6
        with:
          images: ghcr.io/${{ github.repository }}
          tags: |
            # `latest` and `v*` are release pointers. Gate them off for manual
            # (workflow_dispatch) runs — even one dispatched from master — so a
            # preview build can never move `latest` or mint a release tag. The
            # explicit default-branch check replaces `{{is_default_branch}}`,
            # which is also true on a dispatch from master and would otherwise
            # leak `latest` onto a preview image.
            type=raw,value=latest,enable=${{ github.ref_name == github.event.repository.default_branch && github.event_name != 'workflow_dispatch' }}
            type=semver,pattern={{version}},enable=${{ github.event_name != 'workflow_dispatch' }}
            type=semver,pattern={{major}}.{{minor}},enable=${{ github.event_name != 'workflow_dispatch' }}
            # push/tag builds keep the stock sha tag (sha-<short> of github.sha).
            # A manual run may build a ref other than github.sha, so it tags the
            # resolved commit instead — same sha-<short> format, correct commit.
            type=sha,enable=${{ github.event_name != 'workflow_dispatch' }}
            type=raw,value=sha-${{ steps.resolve-ref.outputs.short_sha }},enable=${{ github.event_name == 'workflow_dispatch' }}
          labels: |
            io.github.paperclipai.schema.last-migration=${{ steps.schema.outputs.last }}
            io.github.paperclipai.schema.migration-count=${{ steps.schema.outputs.count }}

      - name: Build and push
        uses: docker/build-push-action@v7
        with:
          context: .
          # Pin the self-hosted image to the production stage explicitly:
          # the Dockerfile now declares a later `cloud` stage, and without a
          # target the default would silently become that stage.
          target: production
          build-args: |
            PAPERCLIP_BUILD_VERSION=${{ steps.build-version.outputs.version }}
            PAPERCLIP_BUILD_COMMIT=${{ steps.resolve-ref.outputs.sha }}
            CLI_TOOLS_CACHE_EPOCH=${{ steps.tools-epoch.outputs.epoch }}
          platforms: linux/amd64,linux/arm64
          push: true
          # Registry-backed BuildKit cache instead of type=gha: the Actions
          # cache is capped at 10GB per repo, and two multi-arch mode=max jobs
          # evict each other, so most builds ran effectively cold. The cache
          # ref lives in ghcr next to the image and is written only by this
          # workflow (docker.yml runs on master/tag pushes, never on PRs).
          cache-from: type=registry,ref=ghcr.io/${{ github.repository }}:buildcache
          cache-to: type=registry,ref=ghcr.io/${{ github.repository }}:buildcache,mode=max
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}

  # The cloud variant carries built bundled plugins for managed deployments
  # (see the `cloud` stage in the Dockerfile). It runs as its own job with no
  # `needs:` on the stock publish above, so the two builds run in parallel and
  # a failure or slow build in one never gates, delays, or skips the other.
  # Both jobs share only the single top-level concurrency slot. Each job is a
  # separate runner, so this one carries its own copy of the prep steps
  # (checkout through schema labels) — the accepted cost of that isolation.
  build-and-push-cloud:
    runs-on: ubuntu-latest
    timeout-minutes: 60
    steps:
      - name: Checkout
        uses: actions/checkout@v7
        with:
          # push/tag builds resolve to github.sha — the checkout default, so
          # their behaviour is unchanged. A manual run may override it with the
          # `ref` input to build an unmerged branch, tag, or commit.
          ref: ${{ inputs.ref || github.sha }}
          # Full history and tags so `git describe` below can compute the
          # release version to stamp into the image.
          fetch-depth: 0

      # Pin every downstream reference to the exact commit that was checked
      # out. On push/tag builds this equals github.sha; on a manual run it is
      # the head of the `ref` input, which can differ from github.sha (the ref
      # the dispatch ran on). The SHA image tag and the commit stamped into the
      # image are both derived from this, so a manual build always tags the
      # commit it actually built.
      - name: Resolve build ref
        id: resolve-ref
        run: |
          set -euo pipefail
          sha="$(git rev-parse HEAD)"
          echo "sha=${sha}" >> "$GITHUB_OUTPUT"
          echo "short_sha=$(git rev-parse --short=7 HEAD)" >> "$GITHUB_OUTPUT"
          echo "Building ${GITHUB_REF} at ${sha}"

      # `.git` is dockerignored, so a running image cannot derive its own
      # version and otherwise reports the source package.json placeholder in
      # analytics and the debug panel. Compute it here from the pristine
      # checkout (real CalVer drift from the nearest release tag) and pass it
      # into the build. Empty when no release tag is reachable — the server
      # then keeps its existing fallbacks.
      - name: Compute build version
        id: build-version
        run: |
          set -euo pipefail
          version="$(git describe --tags --match 'v*' --long --dirty 2>/dev/null || true)"
          echo "version=${version}" >> "$GITHUB_OUTPUT"
          echo "Stamping build version: ${version:-<none>}"

      # ISO week stamp for the Dockerfile's tool layer: the layer caches
      # across commits and re-pulls the @latest CLI tools when the week rolls
      # over, instead of on every build.
      - name: Compute tool cache epoch
        id: tools-epoch
        run: echo "epoch=$(date -u +%G-W%V)" >> "$GITHUB_OUTPUT"

      - name: Setup pnpm
        uses: pnpm/action-setup@v6
        with:
          version: 9.15.4
          run_install: false

      # No dependency cache here: this workflow publishes release images, and
      # restoring a shared Actions cache into the build inputs would let a
      # poisoned cache entry reach the published artifact.
      - name: Setup Node.js
        uses: actions/setup-node@v7
        with:
          node-version: 20

      - name: Refresh lockfile for Docker build context
        run: |
          set -euo pipefail
          pnpm install --lockfile-only --ignore-scripts --no-frozen-lockfile

          changed="$(git status --porcelain)"
          if [ -z "$changed" ]; then
            echo "Lockfile already matches package metadata."
            exit 0
          fi

          if printf '%s\n' "$changed" | grep -Fvq ' pnpm-lock.yaml'; then
            echo "Unexpected files changed during lockfile refresh:"
            echo "$changed"
            exit 1
          fi

          echo "Using refreshed pnpm-lock.yaml in the Docker build context."

      - name: Free runner disk
        run: |
          set -euo pipefail
          echo "Disk before cleanup:"
          df -h

          pnpm store prune || true
          sudo apt-get clean || true
          sudo rm -rf \
            /usr/share/dotnet \
            /usr/share/swift \
            /usr/local/lib/android \
            /usr/local/share/boost \
            /usr/local/share/powershell \
            /opt/ghc \
            /opt/hostedtoolcache/CodeQL \
            /opt/hostedtoolcache/PyPy \
            /opt/hostedtoolcache/Ruby || true
          docker system prune -af || true

          echo "Disk after cleanup:"
          df -h

      - name: Login to GitHub Container Registry
        uses: docker/login-action@v4
        with:
          registry: ghcr.io
          username: ${{ github.repository_owner }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v4

      # Deployment tooling reads these labels from the registry to verify an
      # image's schema expectations against a migrator before deploying it,
      # without pulling the image. The server refuses to start when the
      # database is missing bundled migrations, so orchestrators need a cheap
      # way to check image/migrator compatibility up front.
      - name: Compute schema migration labels
        id: schema
        run: |
          set -euo pipefail
          last=$(ls packages/db/src/migrations/*.sql | sed 's|.*/||' | LC_ALL=C sort | tail -1)
          count=$(ls packages/db/src/migrations/*.sql | wc -l | tr -d ' ')
          echo "last=${last}" >> "$GITHUB_OUTPUT"
          echo "count=${count}" >> "$GITHUB_OUTPUT"

      # Published under the same tag set with a `-cloud` suffix
      # (sha-<short>-cloud, latest-cloud, <version>-cloud).
      - name: Docker meta (cloud)
        id: meta-cloud
        uses: docker/metadata-action@v6
        with:
          images: ghcr.io/${{ github.repository }}
          flavor: |
            suffix=-cloud,onlatest=true
          tags: |
            # `latest` and `v*` are release pointers. Gate them off for manual
            # (workflow_dispatch) runs — even one dispatched from master — so a
            # preview build can never move `latest` or mint a release tag. The
            # explicit default-branch check replaces `{{is_default_branch}}`,
            # which is also true on a dispatch from master and would otherwise
            # leak `latest` onto a preview image.
            type=raw,value=latest,enable=${{ github.ref_name == github.event.repository.default_branch && github.event_name != 'workflow_dispatch' }}
            type=semver,pattern={{version}},enable=${{ github.event_name != 'workflow_dispatch' }}
            type=semver,pattern={{major}}.{{minor}},enable=${{ github.event_name != 'workflow_dispatch' }}
            # push/tag builds keep the stock sha tag (sha-<short> of github.sha).
            # A manual run may build a ref other than github.sha, so it tags the
            # resolved commit instead — same sha-<short> format, correct commit.
            type=sha,enable=${{ github.event_name != 'workflow_dispatch' }}
            type=raw,value=sha-${{ steps.resolve-ref.outputs.short_sha }},enable=${{ github.event_name == 'workflow_dispatch' }}
          labels: |
            io.github.paperclipai.schema.last-migration=${{ steps.schema.outputs.last }}
            io.github.paperclipai.schema.migration-count=${{ steps.schema.outputs.count }}

      - name: Build and push (cloud)
        uses: docker/build-push-action@v7
        with:
          context: .
          target: cloud
          # Space-separated sandbox-provider directory names to build into
          # the variant; add here when managed deployments need another.
          build-args: |
            CLOUD_BUNDLED_PLUGINS=daytona
            PAPERCLIP_BUILD_VERSION=${{ steps.build-version.outputs.version }}
            PAPERCLIP_BUILD_COMMIT=${{ steps.resolve-ref.outputs.sha }}
            CLI_TOOLS_CACHE_EPOCH=${{ steps.tools-epoch.outputs.epoch }}
          # amd64 only, unlike the self-hosted image above: the cloud variant
          # is consumed exclusively by managed-deployment hosts, which run
          # amd64. The QEMU-emulated arm64 half dominated this job's wall
          # clock, and dropping it roughly halves time-to-deployable-image.
          platforms: linux/amd64
          push: true
          # Registry-backed BuildKit cache, separate ref from the self-hosted
          # job so the two parallel builds never clobber each other's cache
          # manifest (see the rationale on the job above).
          cache-from: type=registry,ref=ghcr.io/${{ github.repository }}:buildcache-cloud
          cache-to: type=registry,ref=ghcr.io/${{ github.repository }}:buildcache-cloud,mode=max
          tags: ${{ steps.meta-cloud.outputs.tags }}
          labels: ${{ steps.meta-cloud.outputs.labels }}