Only run build-and-test workflow in the rr-debugger/rr repository.

Build-and-test won't actually work in forks since they don't have
access to rr-debugger's self-hosted runners.

.github/workflows/build-and-test-main.yml

@@ -6,6 +6,7 @@ jobs:
  setup:
  name: Setup runners
  runs-on: ubuntu-latest
+ if: github.repository == 'rr-debugger/rr'
  steps:
  - id: generate
  name: Generate runner ID
@@ -24,13 +25,15 @@ jobs:
  x86-64:
  uses: ./.github/workflows/build-and-test.yml
  needs: setup
+ if: github.repository == 'rr-debugger/rr'
  with:
  runner_id: ${{ needs.setup.outputs.RUNNER_ID }}_x86_64
  architecture: x86_64
 
  arm64:
  uses: ./.github/workflows/build-and-test.yml
  needs: setup
+ if: github.repository == 'rr-debugger/rr'
  with:
  runner_id: ${{ needs.setup.outputs.RUNNER_ID }}_arm64
  architecture: arm64
@@ -42,7 +45,7 @@ jobs:
  - setup
  - x86-64
  - arm64
- if: ${{ always() }}
+ if: ${{ always() && github.repository == 'rr-debugger/rr' }}
  steps:
  - name: "Stop runners"
  run: |2-