CI: Only run CI on branch or pull request events, but not twice.

.github/workflows/ci.yml

@@ -1,6 +1,8 @@
 name: Tests
 on:
   push:
+    branches-ignore:
+      - main
   pull_request:
     branches: [main]
   schedule:
@@ -24,7 +26,24 @@ concurrency:
   cancel-in-progress: true
 
 jobs:
+  should-run:
+    runs-on: ubuntu-latest
+    outputs:
+      run-workflow: ${{ steps.check.outputs.run-workflow }}
+    steps:
+      - id: check
+        run: |
+          if [[ "${{ github.event_name }}" == "pull_request" ]]; then
+            echo "run-workflow=true" >> $GITHUB_OUTPUT
+          elif [[ "${{ github.event_name }}" == "push" && "${{ github.ref }}" != "refs/heads/main" ]]; then
+            echo "run-workflow=true" >> $GITHUB_OUTPUT
+          else
+            echo "run-workflow=false" >> $GITHUB_OUTPUT
+          fi
+
   run-lint:
+    needs: should-run
+    if: needs.should-run.outputs.run-workflow == 'true'
     runs-on: ubuntu-latest
     container:
       image: debian:bookworm
@@ -43,6 +62,8 @@ jobs:
   # This is already built daily by the "build.yml" file
   # But we also want to include this in the checks that run on each push.
   build-container-image:
+    needs: should-run
+    if: needs.should-run.outputs.run-workflow == 'true'
     runs-on: ubuntu-24.04
     steps:
       - uses: actions/checkout@v4
@@ -67,6 +88,8 @@ jobs:
           python3 ./install/common/build-image.py
 
   download-tessdata:
+    needs: should-run
+    if: needs.should-run.outputs.run-workflow == 'true'
     name: Download and cache Tesseract data
     runs-on: ubuntu-latest
     steps:
@@ -91,7 +114,10 @@ jobs:
 
   windows:
     runs-on: windows-latest
-    needs: download-tessdata
+    needs:
+      - download-tessdata
+      - should-run
+    if: needs.should-run.outputs.run-workflow == 'true'
     env:
       DUMMY_CONVERSION: 1
     steps:
@@ -121,7 +147,10 @@ jobs:
   macOS:
     name: "macOS (${{ matrix.arch }})"
     runs-on: ${{ matrix.runner }}
-    needs: download-tessdata
+    needs:
+      - download-tessdata
+      - should-run
+    if: needs.should-run.outputs.run-workflow == 'true'
     strategy:
       matrix:
         include:
@@ -149,9 +178,12 @@ jobs:
         run: poetry run make test
 
   build-deb:
+    needs:
+      - should-run
+      - build-container-image
+    if: needs.should-run.outputs.run-workflow == 'true'
     name: "build-deb (${{ matrix.distro }} ${{ matrix.version }})"
     runs-on: ubuntu-latest
-    needs: build-container-image
     strategy:
       matrix:
         include:
@@ -221,7 +253,10 @@ jobs:
   install-deb:
     name: "install-deb (${{ matrix.distro }} ${{ matrix.version }})"
     runs-on: ubuntu-latest
-    needs: build-deb
+    needs: 
+      - build-deb
+      - should-run
+    if: needs.should-run.outputs.run-workflow == 'true'
     strategy:
       matrix:
         include:
@@ -277,7 +312,10 @@ jobs:
   build-install-rpm:
     name: "build-install-rpm (${{ matrix.distro }} ${{matrix.version}})"
     runs-on: ubuntu-latest
-    needs: build-container-image
+    needs:
+      - build-container-image
+      - should-run
+    if: needs.should-run.outputs.run-workflow == 'true'
     strategy:
       matrix:
         distro: ["fedora"]
@@ -343,6 +381,8 @@ jobs:
     needs:
       - build-container-image
       - download-tessdata
+      - should-run
+    if: needs.should-run.outputs.run-workflow == 'true'
     strategy:
       matrix:
         include: