_dispatcher.yml

# This file is the dispatcher for the rest of the workflows that have complex dependencies.
# The `cli.yml` doesn't need to be dispatched via this dispatcher because it is only run manually.

name: Dispatcher

env:
  GITHUB_OUTPUT: ""

on:
  push:
    branches:
      - main
    paths:
      - "docker/**"
      - ".github/**"
      - "!.github/workflows/cli.yml"
      - "!docker/psibase.Dockerfile"
      - "!docker/psinode.Dockerfile"
  pull_request:
    types: [opened, synchronize, reopened]
    paths:
      - "docker/**"
      - ".github/**"
      - "!.github/workflows/cli.yml"
      - "!docker/psibase.Dockerfile"
      - "!docker/psinode.Dockerfile"

jobs:
  determine-actions:
    name: Set up the dispatching variables
    runs-on: ubuntu-latest
    outputs:
      pr: ${{ steps.conditionals.outputs.pr }}
      build_strategy: ${{ steps.schedule-builders.outputs.builder_strategy }}

    steps:
      - name: Checkout code
        uses: actions/checkout@v4
        with:
          submodules: false
          fetch-depth: 0

      - name: Determine artifact registry
        id: conditionals
        run: |
          if [[ "${{ github.event_name }}" == "pull_request" ]]; then
            echo "pr=true" >> $GITHUB_OUTPUT
          fi

      - name: Get changed files
        id: changed-files
        uses: tj-actions/changed-files@v42

      - name: Print changed files
        env:
          ALL_CHANGED_FILES: ${{ steps.changed-files.outputs.all_changed_files }}
        run: |
          for file in $ALL_CHANGED_FILES; do
            echo $file
          done

      - name: Determine what to dispatch
        id: schedule-builders
        env:
          ALL_CHANGED_FILES: ${{ steps.changed-files.outputs.all_changed_files }}
        run: |
          chmod +x .github/scripts/check-patterns.sh
          echo "builder_strategy=$(./.github/scripts/check-patterns.sh "$ALL_CHANGED_FILES")" >> $GITHUB_OUTPUT

# Possible dispatching scenarios
# 0: don't run anything
# 1: run tool config (and all dependent workflows)
# 2: run 2004 builder
# 3: run 2204 builder (and dependent)
# 4: run both builders (and dependent)
# 5: run contributor

# CASE 0
  do-nothing:
    name: "Not building anything"
    needs: determine-actions
    if: ${{ needs.determine-actions.outputs.build_strategy == '0' }}
    runs-on: ubuntu-latest
    steps:
      - name: noop
        run: true


# CASE 1
  start-with-tool-config-1:
    name: "Build tool-config"
    needs: determine-actions
    if: ${{ needs.determine-actions.outputs.build_strategy == '1' }}
    uses: ./.github/workflows/tool-config.yml
    with:
      is_pr: ${{ needs.determine-actions.outputs.pr }}

  start-with-tool-config-2: 
    name: "Build 20.04 builder"
    needs: [determine-actions, start-with-tool-config-1]
    if: ${{ needs.determine-actions.outputs.build_strategy == '1' }}
    uses: ./.github/workflows/builder-ubuntu.yml
    with:
      is_pr: ${{ needs.determine-actions.outputs.pr }}
      ubuntu_version: "2004"

  start-with-tool-config-3:
    name: "Build 22.04 builder"
    needs: [determine-actions, start-with-tool-config-1]
    if: ${{ needs.determine-actions.outputs.build_strategy == '1' }}
    uses: ./.github/workflows/builder-ubuntu.yml
    with:
      is_pr: ${{ needs.determine-actions.outputs.pr }}
      ubuntu_version: "2204"

  start-with-tool-config-4:
    name: "Build psibase contributor"
    needs: [determine-actions, start-with-tool-config-3]
    if: ${{ needs.determine-actions.outputs.build_strategy == '1' }}
    uses: ./.github/workflows/contributor.yml
    with:
      is_pr: ${{ needs.determine-actions.outputs.pr }}


# CASE 2
  run-only-2004-builder: 
    name: "Build 20.04 builder"
    needs: determine-actions
    if: ${{ needs.determine-actions.outputs.build_strategy == '2' }}
    uses: ./.github/workflows/builder-ubuntu.yml
    with:
      is_pr: ${{ needs.determine-actions.outputs.pr }}
      ubuntu_version: "2004"


# CASE 3
  start-with-2204-builder-1:
    name: "Build 22.04 builder"
    needs: determine-actions
    if: ${{ needs.determine-actions.outputs.build_strategy == '3' }}
    uses: ./.github/workflows/builder-ubuntu.yml
    with:
      is_pr: ${{ needs.determine-actions.outputs.pr }}
      ubuntu_version: "2204"

  start-with-2204-builder-2:
    name: "Build psibase contributor"
    needs: [determine-actions, start-with-2204-builder-1]
    if: ${{ needs.determine-actions.outputs.build_strategy == '3' }}
    uses: ./.github/workflows/contributor.yml
    with:
      is_pr: ${{ needs.determine-actions.outputs.pr }}


# CASE 4
  start-with-builders-1:
    name: "Build 20.04 builder"
    needs: determine-actions
    if: ${{ needs.determine-actions.outputs.build_strategy == '4' }}
    uses: ./.github/workflows/builder-ubuntu.yml
    with:
      is_pr: ${{ needs.determine-actions.outputs.pr }}
      ubuntu_version: "2004"

  start-with-builders-2: 
    name: "Build 22.04 builder"
    needs: determine-actions
    if: ${{ needs.determine-actions.outputs.build_strategy == '4' }}
    uses: ./.github/workflows/builder-ubuntu.yml
    with:
      is_pr: ${{ needs.determine-actions.outputs.pr }}
      ubuntu_version: "2204"

  start-with-builders-3:
    name: "Build psibase contributor"
    needs: [determine-actions, start-with-builders-2]
    if: ${{ needs.determine-actions.outputs.build_strategy == '4' }}
    uses: ./.github/workflows/contributor.yml
    with:
      is_pr: ${{ needs.determine-actions.outputs.pr }}


# CASE 5
  run-only-contributor: 
    name: "Build psibase contributor"
    needs: determine-actions
    if: ${{ needs.determine-actions.outputs.build_strategy == '5' }}
    uses: ./.github/workflows/contributor.yml
    with:
      is_pr: ${{ needs.determine-actions.outputs.pr }}