ci: Only start a single container job

This introduces the main.yml workflow which is triggered on push and
pull requests which then calls out to the workflows we actually want to
run. The first one is container.yml which is a dependency of both
build-and-test.yml and pages.yml which run in parallel.

This means that we only have to check the registry once for the image
and if we have to build it, we also do it once only.

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

@@ -1,33 +1,33 @@
-name: Build and Test
-
-on: [push, pull_request]
-
 env:
   TESTS_TIMEOUT: 10 # in minutes
 
-jobs:
-  build-container:
-    uses: ./.github/workflows/container.yml
-    permissions:
-      packages: write
+on:
+  workflow_call:
+    inputs:
+      image:
+        required: true
+        type: string
+      image_options:
+        required: true
+        type: string
 
+jobs:
   build-and-test:
     name: Build and Test
     runs-on: ubuntu-latest
-    needs: build-container
     strategy:
       matrix:
         compiler: ['gcc', 'clang']
         sanitizer: ['address']
 
     container:
-      image: ${{ needs.build-container.outputs.image }}
+      image: ${{ inputs.image }}
       env:
         CFLAGS: -Wp,-D_FORTIFY_SOURCE=2
         CC: ${{ matrix.compiler }}
         TEST_IN_CI: 1
         G_MESSAGES_DEBUG: all
-      options: ${{ needs.build-container.outputs.image_options }}
+      options: ${{ inputs.image_options }}
 
     steps:
       - name: Configure environment

.github/workflows/container.yml

@@ -1,5 +1,3 @@
-name: Create build container
-
 env:
   IMAGE_TAG: 20241008-1
 

.github/workflows/main.yml

@@ -0,0 +1,30 @@
+name: CI
+
+on: [push, pull_request]
+
+jobs:
+  build-container:
+    name: Container
+    uses: ./.github/workflows/container.yml
+    permissions:
+      packages: write
+
+  build-and-test:
+    name: Build and Test
+    uses: ./.github/workflows/build-and-test.yml
+    needs: build-container
+    with:
+      image: ${{ needs.build-container.outputs.image }}
+      image_options: ${{ needs.build-container.outputs.image_options }}
+
+  pages:
+    name: Documentation & Website
+    uses: ./.github/workflows/pages.yml
+    needs: build-container
+    permissions:
+      contents: read
+      pages: write
+      id-token: write
+    with:
+      image: ${{ needs.build-container.outputs.image }}
+      image_options: ${{ needs.build-container.outputs.image_options }}

.github/workflows/pages.yml

@@ -1,31 +1,25 @@
-name: Documentation & Website
-
-on: [push, pull_request]
-
-permissions:
-  contents: read
-  pages: write
-  id-token: write
+on:
+  workflow_call:
+    inputs:
+      image:
+        required: true
+        type: string
+      image_options:
+        required: true
+        type: string
 
 concurrency:
   group: "pages"
   cancel-in-progress: false
 
 jobs:
-  build-container:
-    uses: ./.github/workflows/container.yml
-    permissions:
-      packages: write
-
   build:
+    name: Build docs and website
     runs-on: ubuntu-latest
-    needs: build-container
-    permissions:
-      contents: write
 
     container:
-      image: ${{ needs.build-container.outputs.image }}
-      options: ${{ needs.build-container.outputs.image_options }}
+      image: ${{ inputs.image }}
+      options: ${{ inputs.image_options }}
 
     steps:
       - name: Check out xdg-desktop-portal
@@ -52,6 +46,7 @@ jobs:
 
   # Deployment job
   deploy:
+    name: Deploy
     runs-on: ubuntu-latest
     needs: build
     environment:

.github/workflows/release.yml

@@ -13,6 +13,7 @@ on:
 
 jobs:
   build-container:
+    name: Container
     uses: ./.github/workflows/container.yml
     permissions:
       packages: write