check-which-tests-to-run.yaml

name: Check which tests to run

on:
  workflow_call:
    outputs:
      weave_query_tests:
        value: ${{ jobs.check.outputs.weave_query_tests }}
      weave_js_tests:
        value: ${{ jobs.check.outputs.weave_js_tests }}
      trace_server_tests:
        value: ${{ jobs.check.outputs.trace_server_tests }}

env:
  WEAVE_QUERY_PATHS: 'weave_query/'
  WEAVE_JS_PATHS: 'weave-js/'
  TRACE_SERVER_PATHS: 'weave/trace_server/'
  # Everything else is implicitly trace SDK

jobs:
  check:
    runs-on: ubuntu-latest
    outputs:
      weave_query_tests: ${{ steps.weave_query.outputs.run_tests }}
      weave_js_tests: ${{ steps.weave_js.outputs.run_tests }}
      trace_server_tests: ${{ steps.trace_server.outputs.run_tests }}
    steps:
      - uses: actions/checkout@v3
        with:
          fetch-depth: 0
          fetch-tags: true
          ref: ${{ github.head_ref }}
      - name: Get changed files
        run: |
          # Fetch all branches
          git fetch --all

          # Determine the base branch and current commit
          if [[ "${{ github.event_name }}" == "pull_request" ]]; then
            # For pull requests
            BASE_BRANCH="${{ github.base_ref }}"
            CURRENT_COMMIT="${{ github.event.pull_request.head.sha }}"
          else
            # For pushes
            BASE_BRANCH=$(git remote show origin | sed -n '/HEAD branch/s/.*: //p')
            CURRENT_COMMIT="${{ github.sha }}"
          fi
          echo "Base branch is $BASE_BRANCH"

          # Find the common ancestor
          MERGE_BASE=$(git merge-base origin/$BASE_BRANCH $CURRENT_COMMIT)

          # Get changed files
          changed_files=$(git diff --name-only $MERGE_BASE $CURRENT_COMMIT)
          echo "Changed files:"
          echo "$changed_files"
          echo "changed_files<<EOF" >> $GITHUB_ENV
          echo "$changed_files" >> $GITHUB_ENV
          echo "EOF" >> $GITHUB_ENV
      - id: weave_query
        name: Weave Query Checks
        run: |
          for path in ${{ env.WEAVE_QUERY_PATHS }}; do
            if echo "$changed_files" | grep -q "$path"; then
              echo "run_tests=true" >> $GITHUB_OUTPUT
              exit 0
            fi
          done
          echo "run_tests=false" >> $GITHUB_OUTPUT
      - id: weave_js
        name: Weave JS Checks
        run: |
          for path in ${{ env.WEAVE_JS_PATHS }}; do
            if echo "$changed_files" | grep -q "$path"; then
              echo "run_tests=true" >> $GITHUB_OUTPUT
              exit 0
            fi
          done
          echo "run_tests=false" >> $GITHUB_OUTPUT
      - id: trace_server
        name: Weave Trace Server Checks
        run: |
          for path in ${{ env.TRACE_SERVER_PATHS }}; do
            if echo "$changed_files" | grep -q "$path"; then
              echo "run_tests=true" >> $GITHUB_OUTPUT
              exit 0
            fi
          done
          echo "run_tests=false" >> $GITHUB_OUTPUT