GitHub actions: add doc job

This job monitors only changes in documentation files
and uploads generated html files as a resulting artifact.

Also, ignore changes in documentation files when running tests -
this is more environment-friendly and saves a lot of time.

Change-Id: I807a5a246d8b9527ada2e9e5cd23234b9278b1b0
Reviewed-by: Christian Kandeler <christian.kandeler@qt.io>

2 files changed, 43 insertions, 1 deletions

diff --git a/.github/workflows/docs.yml b/.github/workflows/docs.yml
new file mode 100644
index 000000000..248baf5f7
--- /dev/null
+++ b/.github/workflows/docs.yml
@@ -0,0 +1,38 @@
+name: Build and Qbs docs
+
+on:
+  push:
+    paths:
+      - 'doc/**'
+      - 'examples/**'
+      - 'scripts/build-qbs-doc.sh'
+      - 'VERSION'
+
+jobs:
+  build-docs:
+    name: ${{ matrix.config.name }}
+    runs-on: ubuntu-latest
+    timeout-minutes: 60
+    strategy:
+      fail-fast: false
+      matrix:
+        config:
+        - {
+            name: 'Build Qbs Docs',
+            options: '',
+            script: './scripts/build-qbs-doc.sh'
+          }
+    env:
+      BUILD_OPTIONS: ${{ matrix.config.options }}
+      WITH_TESTS: 0
+    steps:
+    - uses: actions/checkout@v1
+    - name: Pull the Focal Image
+      run: docker-compose pull focal
+    - name: Build Qbs Docs
+      run: docker-compose run focal ${{ matrix.config.script }}
+    - name: Upload artifacts
+      uses: 'actions/upload-artifact@v2'
+      with:
+        name: qbs-docs-${{ github.run_id }}
+        path: documentation/install-root/usr/local/share/doc/qbs/
diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 6f0cbdb33..6f148c0ad 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -1,6 +1,10 @@
 name: Build and test Qbs
 
-on: [push]
+on:
+  push:
+    paths-ignore:
+      - 'changelogs/**'
+      - 'doc/**'
 
 jobs:
   build-linux: