feat: add support for defining localtime via volume

Docker engine follows symlinks when creating the volume what makes /tmp/localtime
read-only. But user has apparently configured timezone in this case so we can
skip this step.

.github/workflows/dockerimage.yml

@@ -270,6 +270,94 @@ jobs:
         cd docker-compose
         ./test-stop
 
+  test-localtime:
+    runs-on: ubuntu-24.04
+    name: Test localtime, stable
+    needs:
+    - build
+    - test-basic
+    env:
+      MATRIX_ARCHITECTURE: linux/amd64
+      COMPOSE_PROJECT_NAME: wl
+      PYTHONUNBUFFERED: 1
+      TEST_CONTAINER: weblate/weblate:test
+    steps:
+    - uses: actions/checkout@v4
+      with:
+        submodules: recursive
+    - name: Expose GitHub Runtime
+      uses: crazy-max/ghaction-github-runtime@v3
+    - name: Set up Docker Buildx
+      uses: docker/[email protected]
+      with:
+        # renovate: datasource=github-releases depName=docker/buildx
+        version: v0.18.0
+    - name: Build the Docker image
+      run: .github/bin/docker-build load
+    - name: List Docker images
+      run: docker image ls --all
+    - name: Generate configuration
+      run: |
+        cd docker-compose
+        ./test-generate 8080 http localtime
+    - name: Startup container
+      run: |
+        cd docker-compose
+        ./test-boot
+    - name: List Python packages
+      run: |
+        cd docker-compose
+        ./test-pip
+    - name: Inspect container
+      run: |
+        cd docker-compose
+        ./test-inspect
+    - name: Check service is running
+      run: |
+        cd docker-compose
+        ./test-online
+    - name: Check service health status
+      run: |
+        cd docker-compose
+        ./test-health
+    - name: Run Django Checks
+      run: |
+        cd docker-compose
+        ./test-checks
+    - name: Verify supervisor
+      run: |
+        cd docker-compose
+        ./test-supervisor
+    - name: Test admin creation
+      run: |
+        cd docker-compose
+        ./test-admin
+    - name: Test commands
+      run: |
+        cd docker-compose
+        ./test-commands
+    - name: Display logs
+      if: always()
+      run: |
+        cd docker-compose
+        ./test-logs
+    - name: Stop Weblate service
+      run: |
+        cd docker-compose
+        docker compose stop weblate
+    - name: Start Weblate service
+      run: |
+        cd docker-compose
+        docker compose start weblate
+    - name: Check service is running
+      run: |
+        cd docker-compose
+        ./test-online
+    - name: Shutdown service
+      run: |
+        cd docker-compose
+        ./test-stop
+
   test-saml:
     runs-on: ubuntu-24.04
     name: Test SAML, stable

start

@@ -104,11 +104,13 @@ export PGPASSWORD="$POSTGRES_PASSWORD"
 export PGSSLMODE="$POSTGRES_SSL_MODE"
 
 # Update the time zone
-zonefile="/usr/share/zoneinfo/$WEBLATE_TIME_ZONE"
-if [ -n "$WEBLATE_TIME_ZONE" ] && [ -f "$zonefile" ] ; then
-    cat "$zonefile" > /tmp/localtime
-else
-    cat /usr/share/zoneinfo/Etc/UTC > /tmp/localtime
+if [ -w /tmp/localtime ] ; then
+    zonefile="/usr/share/zoneinfo/$WEBLATE_TIME_ZONE"
+    if [ -n "$WEBLATE_TIME_ZONE" ] && [ -f "$zonefile" ] ; then
+        cat "$zonefile" > /tmp/localtime
+    else
+        cat /usr/share/zoneinfo/Etc/UTC > /tmp/localtime
+    fi
 fi
 
 # Create fake Python app for customization