update-flux.yaml

name: update-flux

on:
  workflow_dispatch:
  schedule:
    - cron: "0 * * * *"

jobs:
  update-flux:
    runs-on: ubuntu-latest
    steps:
      - name: Check out code
        uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
      - name: Setup Go
        uses: actions/setup-go@0a12ed9d6a96ab950c8f026ed9f722fe0da7ef32 # v5.0.2
        with:
          go-version: 1.23.x
          cache-dependency-path: |
            **/go.sum
            **/go.mod
      - name: Setup Flux CLI
        uses: fluxcd/flux2/action@main
        with:
          token: ${{ secrets.GITHUB_TOKEN }}
      - name: Update component versions
        id: update
        run: |

          latest_release=$(flux version --client | awk '{print $2}')

          # Check if the tag was fetched successfully
          if [ "$latest_release" == "null" ] || [ -z "$latest_release" ]; then
            printf "Failed to fetch the latest release.\n"
            exit 1
          else
            printf "The latest release of Flux2 is: %s.\n" "${latest_release}"
          fi

          # Obtain the current version of Flux2 leveraged in this repository
          # shellcheck disable=SC2046
          current_version=$(grep 'DefaultFluxVersion' internal/utils/flux.go | awk '{ print $5 }' | tr -d '"')
          printf "The current version of Flux2 in this repository is: %s.\n" "$current_version"

          # If the latest release and the current version are the same, exit
          if [ "${latest_release}" == "${current_version}" ]; then
            printf "The current version of Flux2 in this repository is up to date. Exiting....\n"
            exit 0
          fi

          # Replace the current version with the latest release
          sed -i "s/${current_version}/${latest_release}/g" internal/utils/flux.go
          printf "The version of Flux2 has been updated to %s.\n" "${latest_release}"

          # Run go mod tidy to update the go.mod file
          go mod edit -require github.com/fluxcd/flux2/v2@"${latest_release}"
          go mod tidy -compat=1.22

          # Run the build and generate the documentation
          printf "Running the build and generating the documentation...\n"
          make build
          make docs

          git diff

          PR_TITLE="Update Flux to ${latest_release}"
          PR_BODY=$(mktemp)
          echo "- github.com/fluxcd/flux2 to ${latest_release}" >> $PR_BODY
          echo "  https://github.com/fluxcd/flux2/releases/${latest_release}" >> $PR_BODY

          # NB: this may look strange but it is the way it should be done to
          # maintain our precious newlines
          # Ref: https://github.com/github/docs/issues/21529
          echo 'pr_body<<EOF' >> $GITHUB_OUTPUT
          cat $PR_BODY >> $GITHUB_OUTPUT
          echo 'EOF' >> $GITHUB_OUTPUT
          echo "pr_title=$PR_TITLE" >> $GITHUB_OUTPUT
      - name: Create Pull Request
        id: cpr
        uses: peter-evans/create-pull-request@5e914681df9dc83aa4e4905692ca88beb2f9e91f # v7.0.5
        with:
          token: ${{ secrets.BOT_GITHUB_TOKEN }}
          commit-message: |
            ${{ steps.update.outputs.pr_title }}

            ${{ steps.update.outputs.pr_body }}
          committer: GitHub <noreply@github.com>
          author: fluxcdbot <fluxcdbot@users.noreply.github.com>
          signoff: true
          title: ${{ steps.update.outputs.pr_title }}
          body: |
            ${{ steps.update.outputs.pr_body }}
          branch: update-components
          labels: |
            area/build
          reviewers: ${{ secrets.ASSIGNEES }}
      - name: Check output
        run: |
          echo "Pull Request Number - ${{ steps.cpr.outputs.pull-request-number }}"