Skip unnessary workflow checks (#2872)

Signed-off-by: Christian Mesh <christianmesh1@gmail.com>

.github/workflows/checks.yml

@@ -32,9 +32,25 @@ permissions:
   contents: read
 
 jobs:
+  fileschanged:
+    name: List files changed for pull request
+    runs-on: ubuntu-latest
+    steps:
+      - name: "Fetch source code"
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - id: diff 
+        run: |
+          echo "Comparing head_commit ${{github.event.push.head_commit}} to base_ref ${{github.event.push.base_ref}}"
+          git fetch --no-tags --prune --no-recurse-submodules --depth=1 origin ${{github.event.pull_request.base.ref}}
+          echo "go=$(git diff --name-only origin/${{github.event.pull_request.base.ref}} | grep '\.go' | wc -l)" | tee -a "$GITHUB_OUTPUT"
+    outputs:
+      go: ${{ steps.diff.outputs.go }}
+    
   unit-tests:
     name: Unit tests for ${{ matrix.goos }}_${{ matrix.goarch }}
     runs-on: ${{ matrix.runson }}
+    needs: fileschanged
+    if: ${{ needs.fileschanged.outputs.go != 0}}
     env:
       TF_APPEND_USER_AGENT: Integration-Test
       GOOS: ${{ matrix.goos }}
@@ -88,6 +104,8 @@ jobs:
   race-tests:
     name: "Race Tests"
     runs-on: ubuntu-latest
+    needs: fileschanged
+    if: ${{ needs.fileschanged.outputs.go != 0}}
 
     steps:
       - name: "Fetch source code"
@@ -126,6 +144,8 @@ jobs:
     # that might leak through this.
     name: "End-to-end Tests"
     runs-on: ubuntu-latest
+    needs: fileschanged
+    if: ${{ needs.fileschanged.outputs.go != 0}}
 
     steps:
       - name: "Fetch source code"
@@ -158,6 +178,8 @@ jobs:
   consistency-checks:
     name: "Code Consistency Checks"
     runs-on: ubuntu-latest
+    needs: fileschanged
+    if: ${{ needs.fileschanged.outputs.go != 0}}
 
     steps:
       - name: "Fetch source code"
@@ -266,14 +288,3 @@ jobs:
         with:
           path: ".licensei.cache"
           key: licensei-cache-${{ hashFiles('go.sum') }}
- 
-  installation-instructions:
-    name: "Test Installation Instructions"
-    runs-on: ubuntu-latest
-
-    steps:
-      - name: "Fetch source code"
-        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
-
-      - name: "Run Installation Instructions Test"
-        run: make test-linux-install-instructions

.github/workflows/compare-snapshots.yml

@@ -10,9 +10,25 @@ on:
   pull_request:
 
 jobs:
+  fileschanged:
+    name: List files changed for pull request
+    runs-on: ubuntu-latest
+    steps:
+      - name: "Fetch source code"
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - id: diff 
+        run: |
+          echo "Comparing head_commit ${{github.event.push.head_commit}} to base_ref ${{github.event.push.base_ref}}"
+          git fetch --no-tags --prune --no-recurse-submodules --depth=1 origin ${{github.event.pull_request.base.ref}}
+          echo "go=$(git diff --name-only origin/${{github.event.pull_request.base.ref}} | grep '\.go' | wc -l)" | tee -a "$GITHUB_OUTPUT"
+    outputs:
+      go: ${{ steps.diff.outputs.go }}
+
   compare:
     name: Compare
     runs-on: ubuntu-latest
+    needs: fileschanged
+    if: ${{ needs.fileschanged.outputs.go != 0}}
 
     steps:
       - name: Checkout

.github/workflows/website.yml

@@ -10,9 +10,27 @@ on:
       - 'v[0-9]+.[0-9]+.[0-9]+*'
 
 jobs:
+  fileschanged:
+    name: List files changed for pull request
+    runs-on: ubuntu-latest
+    steps:
+      - name: "Fetch source code"
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - id: diff 
+        run: |
+          echo "Comparing current commit to base ref origin/${{github.event.pull_request.base.ref}}"
+          git fetch --no-tags --prune --no-recurse-submodules --depth=1 origin ${{github.event.pull_request.base.ref}}
+          echo "install=$(git diff --name-only origin/${{github.event.pull_request.base.ref}} | grep 'website/docs/intro/install' | wc -l)" | tee -a "$GITHUB_OUTPUT"
+          echo "website=$(git diff --name-only origin/${{github.event.pull_request.base.ref}} | grep 'website/' | wc -l)" | tee -a "$GITHUB_OUTPUT"
+    outputs:
+      install: ${{ steps.diff.outputs.install }}
+      website: ${{ steps.diff.outputs.website }}
+
   build:
     name: Build
     runs-on: ubuntu-latest
+    needs: fileschanged
+    if: ${{ needs.fileschanged.outputs.website != 0}}
     steps:
       - name: Checkout
         uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
@@ -24,3 +42,16 @@ jobs:
       - name: Build website
         run: docker compose -f docker-compose.build.yml up --exit-code-from website
         working-directory: website
+
+  installation-instructions:
+    name: "Test Installation Instructions"
+    runs-on: ubuntu-latest
+    needs: fileschanged
+    if: ${{ needs.fileschanged.outputs.install != 0}}
+
+    steps:
+      - name: "Fetch source code"
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+
+      - name: "Run Installation Instructions Test"
+        run: make test-linux-install-instructions