devcontainer-build.yml

name: Devcontainer image

# Builds the dev container base image used by .devcontainer/devcontainer.json
# (VS Code Dev Containers + GitHub Codespaces) and publishes it to GHCR.
#
# Currently triggered only by manual dispatch — auto-triggers on
# pull_request and push were removed pending a one-time TryGhost org-admin
# bootstrap of the ghost-devcontainer package on GHCR. Until then,
# GITHUB_TOKEN can't create the package on first push (`denied:
# permission_denied: write_package`), and we don't want every PR's CI to
# show a noisy failed check.
#
# Once the package shell exists at github.com/orgs/TryGhost/packages and
# is linked to this repo with Actions write access, restore the
# `pull_request:` and `push:` triggers in a tiny follow-up PR so the
# image rebuilds automatically on changes to docker/ghost-dev/** and
# pnpm-install inputs.

on:
  workflow_dispatch:

permissions:
  contents: read
  packages: write

jobs:
  publish:
    name: Build & push
    runs-on: ubuntu-latest
    if: github.repository == 'TryGhost/Ghost'
    concurrency:
      group: devcontainer-image-${{ github.ref }}
      cancel-in-progress: true
    steps:
      - name: Checkout
        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@4d04d5d9486b7bd6fa91e7baf45bbb4f8b9deedd # v4

      - name: Login to GHCR
        uses: docker/login-action@4907a6ddec9925e35a0a9e82d7399ccc52663121 # v4
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Build & push
        uses: docker/build-push-action@bcafcacb16a39f128d818304e6c9c0c18556b85f # v7
        with:
          context: .
          file: docker/ghost-dev/Dockerfile
          push: true
          tags: |
            ghcr.io/tryghost/ghost-devcontainer:latest
            ghcr.io/tryghost/ghost-devcontainer:${{ github.sha }}
          cache-from: type=gha
          cache-to: type=gha,mode=max