docker.yml

name: Docker Build

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

permissions:
  contents: read
  packages: write

env:
  REGISTRY: ghcr.io
  IMAGE: windshiftapp/windshift-agent
  # The thin agent image lifts the `ws` CLI from a core-built image. core's
  # docker.yml publishes ws-carrier:main on every main push (and :<version>
  # on tags), but only :latest on stable releases — so default to :main,
  # which always exists. (Renamed from coding-agent-runner in WI-314: the old
  # name impersonated the agent image and caused the 2026-06-10 wrong-image
  # misconfiguration.) Override via the WS_IMAGE repo/org variable.
  WS_IMAGE: ${{ vars.WS_IMAGE || 'ghcr.io/windshiftapp/ws-carrier:main' }}

jobs:
  build:
    name: Build & publish (windshift-agent)
    runs-on: ubuntu-latest
    steps:
      - name: Checkout code
        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5  # v4.3.1

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@8d2750c68a42422c14e847fe6c8ac0403b4cbd6f  # v3.12.0

      # Log in even on pull_request: the build pulls WS_IMAGE from ghcr.
      - name: Log in to Container Registry
        uses: docker/login-action@c94ce9fb468520275223c153574b00df6fe4bcc9  # v3.7.0
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Extract metadata
        id: meta
        uses: docker/metadata-action@c299e40c65443455700f0fdfc63efafe5b349051  # v5.10.0
        with:
          images: ${{ env.REGISTRY }}/${{ env.IMAGE }}
          tags: |
            type=raw,value=latest,enable=${{ startsWith(github.ref, 'refs/tags/v') && !contains(github.ref, '-dev') && !contains(github.ref, '-test') && !contains(github.ref, '-rc') }}
            type=ref,event=branch
            type=semver,pattern={{version}}
            type=semver,pattern={{major}}.{{minor}}
            type=sha,prefix=

      # The agent build cross-compiles via TARGETARCH (CGO off), so a single
      # multi-platform buildx pass is cheap — no QEMU for the Go stage. Push
      # only off PRs; PRs just validate the build.
      - name: Build and push
        uses: docker/build-push-action@10e90e3645eae34f1e60eeb005ba3a3d33f178e8  # v6.19.2
        with:
          context: .
          platforms: linux/amd64,linux/arm64
          build-args: |
            WS_IMAGE=${{ env.WS_IMAGE }}
          push: ${{ github.event_name != 'pull_request' }}
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          cache-from: type=gha,scope=windshift-agent
          cache-to: type=gha,mode=max,scope=windshift-agent