CI workflows: Forbid merges in case of test failures with conditional jobs

.github/workflows/ci.yaml

@@ -1,32 +1,58 @@
-name: CI
+---
+name: "CI"
 
-on: [push, pull_request]
+on:
+  push:
+    branches:
+      # Do not trigger on tags
+      # https://stackoverflow.com/questions/68573888/how-can-i-not-execute-a-github-action-when-i-push-a-new-tag
+      "**"
+  pull_request:
 
 jobs:
-  ci:
-    runs-on: ${{ matrix.type.os }}
-    name: ${{ matrix.type.target }} (${{ matrix.type.os }})
-    strategy:
-      matrix:
-        type:
-          - { os: windows-latest, target: x86_64-pc-windows-gnu }
-          - { os: ubuntu-latest,  target: x86_64-unknown-linux-gnu }
+  analyse_changes:
+    if: always()
+    runs-on: ubuntu-latest
+    outputs:
+      robotmk_yaml_changed: ${{ steps.filter.outputs.robotmk_yaml }}
+      rcc_yaml_changed: ${{ steps.filter.outputs.rcc_yaml }}
     steps:
       - uses: actions/checkout@v4
-
-      - uses: actions-rust-lang/[email protected]
+      - uses: dorny/paths-filter@v2
+        id: filter
         with:
-          components: rustfmt, clippy
-          target: ${{ matrix.type.target }}
-
-      - run: cargo fmt -- --check
-        working-directory: ${{ github.workspace }}/v2/robotmk/
+          filters: |
+            robotmk_yaml:
+              - '.github/workflows/robotmk.yaml'
+            rcc_yaml:
+              - '.github/workflows/rcc.yaml'
 
-      - run: cargo test --all-targets --target ${{ matrix.type.target }}
-        working-directory: ${{ github.workspace }}/v2/robotmk/
+  tests:
+    if: always()
+    uses: ./.github/workflows/tests.yaml
 
-      - run: cargo clippy --all-targets --target ${{ matrix.type.target }} -- --deny warnings
-        working-directory: ${{ github.workspace }}/v2/robotmk/
+  build_robotmk:
+    needs:
+      - analyse_changes
+    if: ${{ needs.analyse_changes.outputs.robotmk_yaml_changed == 'true' }}
+    uses: ./.github/workflows/robotmk_build.yaml
+
+  rcc:
+    needs:
+      - analyse_changes
+    if: ${{ needs.analyse_changes.outputs.rcc_yaml_changed == 'true' }}
+    uses: ./.github/workflows/rcc.yaml
 
-      - run: cargo build --target ${{ matrix.type.target }}
-        working-directory: ${{ github.workspace }}/v2/robotmk/
+  check_success:
+    if: always()
+    runs-on: Ubuntu-latest
+    needs:
+    - tests
+    - build_robotmk
+    - rcc
+    steps:
+    - name: Decide whether the needed jobs succeeded or failed
+      uses: re-actors/alls-green@release/v1
+      with:
+        allowed-skips: build_robotmk, rcc
+        jobs: ${{ toJSON(needs) }}

.github/workflows/rcc.yaml

@@ -2,12 +2,6 @@
 name: "RCC"
 
 on:
-  push:
-    paths:
-    - .github/workflows/rcc.yaml
-  pull_request:
-    paths:
-    - .github/workflows/rcc.yaml
   workflow_call: {}
 
 jobs:

.github/workflows/release.yaml

@@ -1,22 +1,18 @@
 ---
 name: "Upload all artifacts"
+
 on:
   push:
-    paths:
-      - .github/workflows/release.yaml
-      - .github/workflows/rcc.yaml
-      - .github/workflows/robotmk.yaml
-  pull_request:
-    paths:
-      - .github/workflows/release.yaml
-      - .github/workflows/rcc.yaml
-      - .github/workflows/robotmk.yaml
+    tags:
+      "**"
 
 jobs:
+  tests:
+    uses: ./.github/workflows/tests.yaml
   build_rcc:
     uses: ./.github/workflows/rcc.yaml
   build_robotmk:
-    uses: ./.github/workflows/robotmk.yaml
+    uses: ./.github/workflows/robotmk_build.yaml
   release:
     runs-on: ubuntu-latest
     needs: [build_rcc, build_robotmk]

.github/workflows/robotmk.yaml → .github/workflows/robotmk_build.yaml

@@ -1,12 +1,7 @@
 ---
-name: "Robotmk"
+name: "Build Robotmk"
+
 on:
-  push:
-    paths:
-      - .github/workflows/robotmk.yaml
-  pull_request:
-    paths:
-      - .github/workflows/robotmk.yaml
   workflow_call: {}
 
 jobs:

.github/workflows/tests.yaml

@@ -0,0 +1,33 @@
+name: "Tests"
+
+on:
+  workflow_call: {}
+
+jobs:
+  ci:
+    runs-on: ${{ matrix.type.os }}
+    name: ${{ matrix.type.target }} (${{ matrix.type.os }})
+    strategy:
+      matrix:
+        type:
+          - { os: windows-latest, target: x86_64-pc-windows-gnu }
+          - { os: ubuntu-latest,  target: x86_64-unknown-linux-gnu }
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions-rust-lang/[email protected]
+        with:
+          components: rustfmt, clippy
+          target: ${{ matrix.type.target }}
+
+      - run: cargo fmt -- --check
+        working-directory: ${{ github.workspace }}/v2/robotmk/
+
+      - run: cargo test --all-targets --target ${{ matrix.type.target }}
+        working-directory: ${{ github.workspace }}/v2/robotmk/
+
+      - run: cargo clippy --all-targets --target ${{ matrix.type.target }} -- --deny warnings
+        working-directory: ${{ github.workspace }}/v2/robotmk/
+
+      - run: cargo build --target ${{ matrix.type.target }}
+        working-directory: ${{ github.workspace }}/v2/robotmk/