[DRAFT] CI: skip jobs if no changes to source/tests/cmake are detected

.github/workflows/check-changes.yml

@@ -0,0 +1,40 @@
+name: Check for changes that require running the rest of the CI
+
+on:
+  workflow_call:
+    inputs:
+      directories:
+        description: 'The directories to check for changes'
+        required: true
+        type: string
+    outputs:
+      has_changes:
+        description: 'Whether changes were found or not (yes/no)'
+        value: ${{ jobs.check.outputs.has_changes }}
+
+jobs:
+  check:
+    env:
+      # put the list of directories to watch for changes here, convert to space-separated list
+      watch_list: "${{ join(fromJson(inputs.directories), ' ') }}"
+    runs-on: ubuntu-latest
+    outputs:
+      has_changes: ${{ steps.check.outputs.has_changes }}
+    steps:
+      - id: fetch
+        name: Fetch current branch
+        uses: actions/[email protected]
+        with:
+          fetch-depth: 2
+
+      - id: check
+        name: Check for changes
+        run: |
+          echo "Checking for changes in ${{ env.watch_list }}"
+          if git diff --quiet HEAD^ HEAD -- ${{ env.watch_list }}; then
+            echo "has_changes=no" >> "$GITHUB_OUTPUT"
+            echo "No changes found in ${{ env.watch_list }}"
+          else
+            echo "has_changes=yes" >> "$GITHUB_OUTPUT"
+            echo "Found changes in ${{ env.watch_list }}"
+          fi

.github/workflows/documentation.yml

@@ -14,10 +14,16 @@ concurrency:
   cancel-in-progress: true
 
 jobs:
+  check-changes:
+    uses: './.github/workflows/check-changes.yml'
+    with:
+      directories: "['test/doc/**']"
+
   ##################################################################################################
   ## Randomized precision tests
   ##################################################################################################
   documentation:
+    needs: check-changes
     runs-on: ubuntu-latest
     container:
       image: ghcr.io/jfalcou/compilers:v7
@@ -31,6 +37,10 @@ jobs:
         - { comp: clang, arch: x86    , opts: -msse2    , pch: OFF}
         - { comp: gcc  , arch: x86    , opts: -msse2    , pch: OFF}
     steps:
+      - name: Early exit if no changes
+        if: ${{ needs.check-changes.outputs.has_changes == 'no' }}
+        continue-on-error: true
+        run: exit 1
       - name: Fetch current branch
         uses: actions/[email protected]
 

.github/workflows/integration.yml

@@ -14,11 +14,17 @@ concurrency:
   cancel-in-progress: true
 
 jobs:
+  check-changes:
+    uses: './.github/workflows/check-changes.yml'
+    with:
+      directories: "['cmake/**', 'CMakeLists.txt', 'examples/**', 'test/**', 'include/**', 'doc/**']"
 
   ##################################################################################################
   ## Check install process of EVE via CMake
   ##################################################################################################
   install:
+    needs: check-changes
+    if: ${{ needs.check-changes.outputs.has_changes == 'yes' }}
     runs-on: [ubuntu-latest]
     container:
       image: ghcr.io/jfalcou/compilers:v7
@@ -43,6 +49,8 @@ jobs:
   ## Check install process of EVE via CPM
   ##################################################################################################
   cpm:
+    needs: check-changes
+    if: ${{ needs.check-changes.outputs.has_changes == 'yes' }}
     env:
       BRANCH_NAME: ${{ github.head_ref || github.ref_name }}
     runs-on: [ubuntu-latest]
@@ -64,6 +72,8 @@ jobs:
   ## Check install process of EVE via FetchContents
   ##################################################################################################
   fetch:
+    needs: check-changes
+    if: ${{ needs.check-changes.outputs.has_changes == 'yes' }}
     env:
       BRANCH_NAME: ${{ github.head_ref || github.ref_name }}
     runs-on: [ubuntu-latest]
@@ -85,6 +95,8 @@ jobs:
   ## Check EVE multi-architecture setup
   ##################################################################################################
   multi-arch:
+    needs: check-changes
+    if: ${{ needs.check-changes.outputs.has_changes == 'yes' }}
     runs-on: ubuntu-latest
     container:
       image: ghcr.io/jfalcou/compilers:v6

.github/workflows/random.yml

@@ -14,10 +14,16 @@ concurrency:
   cancel-in-progress: true
 
 jobs:
+  check-changes:
+    uses: './.github/workflows/check-changes.yml'
+    with:
+      directories: "['cmake/**', 'CMakeLists.txt', 'test/random/**', 'include/**']"
+
   ##################################################################################################
   ## Randomized precision tests
   ##################################################################################################
   random:
+    needs: check-changes
     runs-on: ubuntu-latest
     container:
       image: ghcr.io/jfalcou/compilers:v7
@@ -29,6 +35,11 @@ jobs:
         - { comp: clang, arch: x86    , opts: -mavx2    }
         - { comp: clang, arch: aarch64, opts: -Wno-psabi}
     steps:
+      - name: Early exit if no changes
+        if: ${{ needs.check-changes.outputs.has_changes == 'no' }}
+        continue-on-error: true
+        run: exit 1
+
       - name: Fetch current branch
         uses: actions/[email protected]
 

.github/workflows/unit.yml

@@ -14,11 +14,16 @@ concurrency:
   cancel-in-progress: true
 
 jobs:
-
+  check-changes:
+    uses: './.github/workflows/check-changes.yml'
+    with:
+      directories: "['cmake/**', 'CMakeLists.txt', 'examples/**', 'test/**', 'include/**']"
+
   ##################################################################################################
   ## Check no PCH mode
   ##################################################################################################
   no_pch:
+    needs: check-changes
     runs-on: ubuntu-latest
     container:
       image: ghcr.io/jfalcou/compilers:v7
@@ -30,6 +35,10 @@ jobs:
         - { comp: clang, arch: x86    , opts: -msse2    }
         - { comp: gcc  , arch: x86    , opts: -msse2    }
     steps:
+      - name: Early exit if no changes
+        if: ${{ needs.check-changes.outputs.has_changes == 'no' }}
+        continue-on-error: true
+        run: exit 1
       - name: Fetch current branch
         uses: actions/[email protected]
       - name: Prepare EVE with ${{ matrix.cfg.comp }} @ ${{ matrix.cfg.arch }} with ${{ matrix.cfg.opts }}
@@ -51,6 +60,7 @@ jobs:
   ## Full emulation tests
   ##################################################################################################
   nosimd:
+    needs:  check-changes
     runs-on: ubuntu-latest
     container:
       image: ghcr.io/jfalcou/compilers:v7
@@ -61,8 +71,11 @@ jobs:
         cfg:
         - { comp: clang , arch: x86     , opts: -DEVE_NO_SIMD         }
         - { comp: gcc   , arch: x86     , opts: -DEVE_NO_SIMD         }
-
     steps:
+      - name: Early exit if no changes
+        if: ${{ needs.check-changes.outputs.has_changes == 'no' }}
+        continue-on-error: true
+        run: exit 1
       - name: Fetch current branch
         uses: actions/[email protected]
       - name: Running CMake for ${{ matrix.cfg.comp }} on ${{ matrix.cfg.arch }} with ${{ matrix.cfg.opts }}
@@ -78,13 +91,18 @@ jobs:
   ## Mac OS X Targets
   ##################################################################################################
   macosx:
+    needs: check-changes
     runs-on: [macos-12]
     strategy:
       fail-fast: false
       matrix:
         cfg:
         - { comp: clang , arch: x86_osx, opts: -mavx }
     steps:
+      - name: Early exit if no changes
+        if: ${{ needs.check-changes.outputs.has_changes == 'no' }}
+        continue-on-error: true
+        run: exit 1
       - name: Fetch current branch
         uses: actions/[email protected]
       - name: Running CMake for ${{ matrix.cfg.comp }} on ${{ matrix.cfg.arch }} with ${{ matrix.cfg.opts }}
@@ -100,14 +118,18 @@ jobs:
   ## Windows Targets
   ##################################################################################################
   msvc:
+    needs:  check-changes
     runs-on: [windows-2022]
     strategy:
       fail-fast: false
       matrix:
         cfg:
         - { mode: Debug, options: "-DEVE_NO_FORCEINLINE"}
-
     steps:
+      - name: Early exit if no changes
+        if: ${{ needs.check-changes.outputs.has_changes == 'no' }}
+        continue-on-error: true
+        run: exit 1
       - name: Fetch current branch
         uses: actions/[email protected]
       - name: Running CMake for MSVC ${{ matrix.cfg.mode }} ${{ matrix.cfg.options }}
@@ -131,6 +153,7 @@ jobs:
   ## Host 1 - Pre-Skylake SIMD ISA - clang
   ##################################################################################################
   x86-clang:
+    needs:  check-changes
     runs-on: [self-hosted, generic-x86]
     container:
       image: ghcr.io/jfalcou/compilers:v7
@@ -142,8 +165,11 @@ jobs:
         - { comp: clang , arch: x86, opts: -msse4.2 }
         - { comp: clang , arch: x86, opts: -mavx    }
         - { comp: clang , arch: x86, opts: -mavx2   }
-
     steps:
+      - name: Early exit if no changes
+        if: ${{ needs.check-changes.outputs.has_changes == 'no' }}
+        continue-on-error: true
+        run: exit 1
       - name: Fetch current branch
         uses: actions/[email protected]
       - name: Running CMake for ${{ matrix.cfg.comp }} on ${{ matrix.cfg.arch }} with ${{ matrix.cfg.opts }}
@@ -159,7 +185,7 @@ jobs:
   ## Host 1 - PPC & ARM SVE256/512 Tests
   ##################################################################################################
   other-arch:
-    needs: x86-clang
+    needs: [check-changes, x86-clang]
     runs-on: [self-hosted, generic-x86]
     container:
       image: ghcr.io/jfalcou/compilers:v7
@@ -172,6 +198,10 @@ jobs:
         - { comp: gcc, arch: sve512, opts: -Wno-psabi}
         - { comp: gcc, arch: ppc64 , opts: -Wno-psabi}
     steps:
+      - name: Early exit if no changes
+        if: ${{ needs.check-changes.outputs.has_changes == 'no' }}
+        continue-on-error: true
+        run: exit 1
       - name: Fetch current branch
         uses: actions/[email protected]
       - name: Prepare EVE with ${{ matrix.cfg.comp }} @ ${{ matrix.cfg.arch }} with ${{ matrix.cfg.opts }}
@@ -189,7 +219,7 @@ jobs:
   ## Host 1 - Pre-Skylake SIMD ISA - g++
   ##################################################################################################
   x86-gcc:
-    needs: other-arch
+    needs: [ check-changes, other-arch ]
     runs-on: [self-hosted, generic-x86]
     container:
       image: ghcr.io/jfalcou/compilers:v7
@@ -201,8 +231,11 @@ jobs:
         - { comp: gcc , arch: x86, opts: -msse4.2  }
         - { comp: gcc , arch: x86, opts: -mavx     }
         - { comp: gcc , arch: x86, opts: -mavx2    }
-
     steps:
+      - name: Early exit if no changes
+        if: ${{ needs.check-changes.outputs.has_changes == 'no' }}
+        continue-on-error: true
+        run: exit 1
       - name: Fetch current branch
         uses: actions/[email protected]
       - name: Running CMake for ${{ matrix.cfg.comp }} on ${{ matrix.cfg.arch }} with ${{ matrix.cfg.opts }}
@@ -218,6 +251,7 @@ jobs:
   ## Host 2 - Non-X86 - Requires clang and qemu
   ##################################################################################################
   arm:
+    needs: [ check-changes ]
     runs-on: [self-hosted, avx512]
     container:
       image: ghcr.io/jfalcou/compilers:v7
@@ -229,6 +263,10 @@ jobs:
         - { comp: clang, arch: aarch64 , opts: -Wno-psabi}
         - { comp: clang, arch: arm     , opts: -Wno-psabi}
     steps:
+      - name: Early exit if no changes
+        if: ${{ needs.check-changes.outputs.has_changes == 'no' }}
+        continue-on-error: true
+        run: exit 1
       - name: Fetch current branch
         uses: actions/[email protected]
       - name: Prepare EVE with ${{ matrix.cfg.comp }} @ ${{ matrix.cfg.arch }} with ${{ matrix.cfg.opts }}
@@ -250,7 +288,7 @@ jobs:
   ## Host 2 - Post-Skylake SIMD ISA
   ##################################################################################################
   avx512:
-    needs: arm
+    needs: [ check-changes, arm ]
     runs-on: [self-hosted, avx512]
     container:
       image: ghcr.io/jfalcou/compilers:v7
@@ -263,6 +301,10 @@ jobs:
         - { comp: gcc   , arch: x86     , opts: -march=skylake-avx512 }
 
     steps:
+      - name: Early exit if no changes
+        if: ${{ needs.check-changes.outputs.has_changes == 'no' }}
+        continue-on-error: true
+        run: exit 1
       - name: Fetch current branch
         uses: actions/[email protected]
       - name: Running CMake for ${{ matrix.cfg.comp }} on ${{ matrix.cfg.arch }} with ${{ matrix.cfg.opts }}
@@ -278,7 +320,7 @@ jobs:
   ## Host 2 - Pre-Skylake SIMD ISA - Special cases
   ##################################################################################################
   other-cases:
-    needs: avx512
+    needs: [ check-changes, avx512 ]
     runs-on: [self-hosted, avx512]
     container:
       image: ghcr.io/jfalcou/compilers:v7
@@ -294,6 +336,10 @@ jobs:
         - { comp: gcc         , arch: x86     , opts: "-mavx2 -mbmi2 -DEVE_USE_BMI_ON_AVX2" }
 
     steps:
+      - name: Early exit if no changes
+        if: ${{ needs.check-changes.outputs.has_changes == 'no' }}
+        continue-on-error: true
+        run: exit 1
       - name: Fetch current branch
         uses: actions/[email protected]
       - name: Running CMake for ${{ matrix.cfg.comp }} on ${{ matrix.cfg.arch }} with ${{ matrix.cfg.opts }}

.github/workflows/update.yml

@@ -10,7 +10,13 @@ on:
       - main
 
 jobs:
+  check-changes:
+    uses: './.github/workflows/check-changes.yml'
+    with:
+      directories: "['doc/**']"
   generate-doc:
+    needs: check-changes
+    if: ${{ needs.check-changes.outputs.has_changes == 'yes' }}
     runs-on: ubuntu-latest
     container:
       image: ghcr.io/jfalcou/compilers:v7