flux-localhost-build.yaml

---
name: "Flux Localhost Build"

on:
  workflow_dispatch:
    inputs:
      version:
        description: Flux version to build
        # renovate: datasource=docker depName=ghcr.io/fluxcd/flux-manifests
        default: "2.2.3"
        required: true
  push:
    branches: ["main"]
    paths:
      - kube/bootstrap/flux
      - kube/clusters/*/flux/flux-install*.yaml
      - .github/workflows/flux-localhost-build.yaml

env:
  # renovate: datasource=docker depName=ghcr.io/fluxcd/flux-manifests
  FLUX_VERSION: "2.2.3"
  OUTFILE: "kube/bootstrap/flux/flux-install-localhost-manifests.yaml"

jobs:
  flux-localhost-build:
    name: Flux Localhost Build
    runs-on: ubuntu-latest
    permissions:
      contents: write
      pull-requests: write

    steps:
      - name: "Setup variables" # Renovate can't edit the version in `env` block if there's other ${{}} stuff around
        id: "vars"
        shell: "bash"
        run: |
          echo "FLUX_VERSION=${{ github.event.inputs.version || env.FLUX_VERSION }}" >> "${GITHUB_ENV}"
          echo "BRANCH=flux-localhost-build-${{ github.event.inputs.version || env.FLUX_VERSION }}" >> "${GITHUB_ENV}"
          echo "MESSAGE=feat(bootstrap/flux)!: build Flux v${{ github.event.inputs.version || env.FLUX_VERSION }} localhost install manifests" >> "${GITHUB_ENV}"

      - name: "Generate Short Lived OAuth App Token (ghs_*)"
        uses: actions/create-github-app-token@ad38cffc07bac6e3857755914c4c88bfd2db4da4 # v1.10.2
        id: oauth-token
        with:
          app-id: "${{ secrets.BOT_APP_ID }}" # $BOT_APP_ID is found in GitHub App main settings page
          private-key: "${{ secrets.BOT_JWT_PRIVATE_KEY }}" # $BOT_JWT_PRIVATE_KEY is generated in GitHub App main settings page, uses the X.509 private key format

      - name: Setup Flux
        uses: fluxcd/flux2/action@534684601ec8888beb0cc4f51117b59e97606c4d # v2.2.3
        with:
          version: "${{ env.FLUX_VERSION }}"

      - name: Checkout
        uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4.1.7
        with:
          token: "${{ steps.oauth-token.outputs.token }}"

      - name: Build Flux Install Manifests
        shell: bash
        env:
          GH_TOKEN: "${{ steps.oauth-token.outputs.token }}"
        run: |
          git config push.autoSetupRemote true
          git config user.name "${{ secrets.BOT_USERNAME }}[bot]"
          git config user.email "${{ secrets.BOT_API_ID }}+${{ secrets.BOT_USERNAME }}[bot]@users.noreply.github.com" # get $BOT_API_ID from `curl -s 'https://api.github.com/users/$(BOT_USERNAME)%5Bbot%5D' | yq .id`
          git checkout -b ${{ env.BRANCH }} main
          git push origin ${{ env.BRANCH }} --force

          mkdir -p /tmp/flux
          flux pull artifact oci://ghcr.io/fluxcd/flux-manifests:v${{ env.FLUX_VERSION }} --output /tmp/flux/
          flux build kustomization zzz-flux --path /tmp/flux --kustomization-file ./kube/clusters/biohazard/flux/flux-install-localhost.yaml --dry-run | tee ./${{ env.OUTFILE }}

      # below is yoinked from https://gist.github.com/swinton/03e84635b45c78353b1f71e41007fc7c
      - name: Commit Changes # with commit signing
        shell: bash
        env:
          GH_TOKEN: "${{ steps.oauth-token.outputs.token }}"
          GITHUB_TOKEN: "${{ steps.oauth-token.outputs.token }}"
          FILE_TO_COMMIT: "${{ env.OUTFILE }}"
          DESTINATION_BRANCH: "${{ env.BRANCH }}"
        run: |
          export MESSAGE="${{ env.MESSAGE }}"
          export SHA=$( git rev-parse ${{ env.DESTINATION_BRANCH }}:${{ env.FILE_TO_COMMIT }} )
          base64 -i -w0 ${{ env.FILE_TO_COMMIT }} > /tmp/base64data
          if gh api --method PUT /repos/:owner/:repo/contents/${{ env.FILE_TO_COMMIT }} \
              --field message="${MESSAGE}" \
              --field content="@/tmp/base64data" \
              --field encoding="base64" \
              --field branch="${{ env.DESTINATION_BRANCH }}" \
              --field sha="${SHA}" ; then
            echo "Pushed signed commit to GitHub."
          elif gh api --method PUT /repos/:owner/:repo/contents/${{ env.FILE_TO_COMMIT }} \
              --field message="${MESSAGE}" \
              --field content="@/tmp/base64data" \
              --field encoding="base64" \
              --field branch="${{ env.DESTINATION_BRANCH }}" ; then
            echo "Pushed signed commit to GitHub."
          else
            echo "No changes to push or errored pushing."
          fi
          gh pr create --base main --head ${{ env.BRANCH }} --title "${{ env.MESSAGE }}" --body "Updates Flux install manifests, patched for use with localhost hostNetwork, to the ${{ env.FLUX_VERSION }} version." --reviewer ${{ github.repository_owner }}