Deploy Preview #7337
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| # Because C.I. jobs could expose secrets to malicious pull requsets, | |
| # GitHub prevents (by default) exposing action secrets to pull requests | |
| # from forks. | |
| # | |
| # This is great, however, the jobs that use the secrets are still useful on | |
| # pull requests. | |
| # | |
| # To run a _trusted_ workflow, we can trigger it from an event from an _untrusted_ | |
| # workflow. This keeps the secrets out of reach from the fork, but still allows | |
| # us to keep the utility of pull request preview deploys, browserstack running, etc. | |
| # Normally, this _trusted_ behavior is offloaded by Cloudflare, Netlify, Vercel, etc | |
| # -- their own workers are trusted and can push comments / updates to pull requests. | |
| # | |
| # We don't want to use their slower (and sometimes paid) hardware. | |
| # When we use our own workflows, we can re-use the cache built from the PR | |
| # (or elsewhere). | |
| # | |
| # To be *most* secure, you'd need to build all the artifacts in the PR, | |
| # then upload them to then be downloaded in the trusted workflows. | |
| # Trusted workflows should not run any scripts from a PR, as malicious | |
| # submitters may tweak the build scripts. | |
| # Since all build artifacts are for the web browser, and not executed in | |
| # node-space, we can be reasonably confident that downloading and testing/deploying | |
| # those artifacts does not compromise our secrets. | |
| # | |
| # | |
| # More information here: | |
| # https://securitylab.github.com/research/github-actions-preventing-pwn-requests/ | |
| # | |
| # Things that would make this easier: | |
| # Readablity: https://github.com/actions/download-artifact/issues/172 | |
| # Security: | |
| # - if there was a way to avoid pnpm install *entirely* | |
| name: Deploy Preview | |
| # read-write repo token | |
| # access to secrets | |
| on: | |
| workflow_dispatch: | |
| inputs: | |
| prNumber: | |
| required: true | |
| description: Which PR to create a preview for | |
| workflow_run: | |
| workflows: ["CI"] | |
| types: | |
| # as early as possible | |
| - requested | |
| concurrency: | |
| group: deploy-preview-${{ github.event.workflow_run.pull_requests[0].number }} | |
| cancel-in-progress: true | |
| env: | |
| TURBO_API: http://127.0.0.1:9080 | |
| TURBO_TOKEN: this-is-not-a-secret | |
| TURBO_TEAM: myself | |
| jobs: | |
| # This is the only job that needs access to the source code | |
| Build: | |
| runs-on: ubuntu-latest | |
| timeout-minutes: 15 | |
| needs: [determinePR] | |
| steps: | |
| - uses: actions/checkout@v4 | |
| with: | |
| # Defaults to ${{ github.repository }}, but that doesn't work for forks | |
| # This should also make it obvious why this is in a separate workflow | |
| # and in a job that doesn't have access to our secrets. | |
| repository: ${{ github.event.workflow_run.head_repository.full_name }} | |
| ref: ${{ github.event.workflow_run.head_branch }} | |
| - name: TurboRepo local server | |
| uses: felixmosh/turborepo-gh-artifacts@v3 | |
| with: | |
| repo-token: ${{ secrets.GITHUB_TOKEN }} | |
| - uses: wyvox/action-setup-pnpm@v3 | |
| - run: pnpm turbo build | |
| - uses: actions/upload-artifact@v4 | |
| with: | |
| name: deploy-prep-dist | |
| if-no-files-found: error | |
| path: | | |
| ./apps/**/dist/**/* | |
| !node_modules/ | |
| !./**/node_modules/ | |
| ################################################################# | |
| # For the rest: | |
| # Does not checkout code, has access to secrets | |
| ################################################################# | |
| determinePR: | |
| # this job gates the others -- if the workflow_run request did not come from a PR, | |
| # exit as early as possible | |
| runs-on: ubuntu-latest | |
| if: github.event.workflow_run.event == 'pull_request' || github.event.inputs.prNumber | |
| outputs: | |
| number: ${{ steps.pr.outputs.result || steps.number.outputs.pr-number || github.event.inputs.prNumber }} | |
| steps: | |
| - run: echo '${{ toJSON(github.event) }}' | |
| name: "debug workflow_run event" | |
| - run: echo "${{ github.event.number }}" | |
| name: 'debug github.event.number' | |
| # When PR comes from a fork, | |
| # github.event.workflow_run.pull_requests is empty | |
| - run: echo "${{ github.event.workflow_run.pull_requests[0].number }}" | |
| id: number | |
| # https://github.com/orgs/community/discussions/25220#discussioncomment-8697399 | |
| - name: Find associated pull request | |
| # if: "!${{ steps.number.output.pr-number }}" | |
| id: pr | |
| uses: actions/github-script@60a0d83039c74a4aee543508d2ffcb1c3799cdea # v7 | |
| with: | |
| script: | | |
| const response = await github.rest.search.issuesAndPullRequests({ | |
| q: 'repo:${{ github.repository }} is:pr sha:${{ github.event.workflow_run.head_sha }}', | |
| per_page: 1, | |
| }) | |
| const items = response.data.items | |
| if (items.length < 1) { | |
| console.error('No PRs found') | |
| return | |
| } | |
| const pullRequestNumber = items[0].number | |
| console.info("Pull request number is", pullRequestNumber) | |
| return pullRequestNumber | |
| # We can know the URL ahead of time: | |
| # https://<SHA>.limber-glimmer-tutorial.pages.dev | |
| # https://<SHA>.limber-glimdown.pages.dev | |
| DeployPreview: | |
| name: "Deploy: Preview ${{ matrix.app.name }}" | |
| runs-on: ubuntu-latest | |
| timeout-minutes: 15 | |
| needs: [Build] | |
| permissions: | |
| contents: read | |
| strategy: | |
| matrix: | |
| app: | |
| - { path: "./tutorial/dist", cloudflareName: "limber-glimmer-tutorial", name: "tutorial" } | |
| - { path: "./repl/dist", cloudflareName: "limber-glimdown", name: "limber" } | |
| steps: | |
| - uses: actions/download-artifact@v4 | |
| name: deploy-prep-dist | |
| - name: Preview ${{ matrix.app.name }} | |
| working-directory: ./deploy-prep-dist/${{ matrix.app.path }} | |
| run: | | |
| npx wrangler pages deploy ./ \ | |
| --project-name=${{ matrix.app.cloudflareName }} \ | |
| --branch=${{ github.event.workflow_run.head_branch }} \ | |
| --commit-hash=${{ github.event.workflow_run.head_sha }} | |
| env: | |
| CLOUDFLARE_ACCOUNT_ID: ${{ secrets.CLOUDFLARE_ACCOUNT_ID }} | |
| CLOUDFLARE_API_TOKEN: ${{ secrets.CLOUDFLARE_API_TOKEN }} | |
| ReformatSubDomain: | |
| name: Reformat Sub-domain Alias | |
| runs-on: ubuntu-latest | |
| needs: [determinePR] | |
| outputs: | |
| subdomain: ${{ steps.reformat.outputs.subdomain }} | |
| steps: | |
| - id: reformat | |
| run: | | |
| branch="${{ github.event.workflow_run.head_branch }}" | |
| # Remove any / in the branch name | |
| # renovate/uuid becomes renovate-uuid | |
| subdomain="${branch//\//-}" | |
| subdomain=$(echo $subdomain | cut -c -28) | |
| echo "subdomain=$subdomain" >> $GITHUB_OUTPUT | |
| PostComment: | |
| name: Post Preview URL as comment to PR | |
| runs-on: ubuntu-latest | |
| needs: [DeployPreview, ReformatSubDomain, determinePR] | |
| permissions: | |
| pull-requests: write | |
| steps: | |
| - uses: marocchino/sticky-pull-request-comment@v2 | |
| with: | |
| header: preview-urls | |
| number: ${{ needs.determinePR.outputs.number }} | |
| message: |+ | |
| | Project | Preview URL[^note] | Manage | | |
| | ------- | ------------------ | ------ | | |
| | Limber | https://${{ needs.ReformatSubDomain.outputs.subdomain }}.limber-glimdown.pages.dev | [on Cloudflare](https://dash.cloudflare.com/c67910a047e1510fec6d0d0cf442934c/pages/view/limber-glimdown) | | |
| | Tutorial | https://${{ needs.ReformatSubDomain.outputs.subdomain }}.limber-glimmer-tutorial.pages.dev | [on Cloudflare](https://dash.cloudflare.com/c67910a047e1510fec6d0d0cf442934c/pages/view/limber-glimmer-tutorial) | |
| [Logs](https://github.com/NullVoxPopuli/limber/actions/runs/${{ github.run_id }}) | |
| [^note]: if these branch preview links are not working, please check the logs for the commit-based preview link. There is a character limit of 28 for the branch subdomain, as well as some other heuristics, [described here](https://community.cloudflare.com/t/algorithm-to-generate-a-preview-dns-subdomain-from-a-branch-name/477633?u=walshymvp) for the sake of implementation ease in deploy-preview.yml, that algo has been omitted. The URLs are logged in the wrangler output, but it's hard to get outputs from a matrix job. | |