Remove protobuf dependencies (mastodon#17539)

.github/workflows/build-image.yml

@@ -6,6 +6,10 @@ on:
       - "main"
     tags:
       - "*"
+  pull_request:
+    paths:
+      - .github/workflows/build-image.yml
+      - Dockerfile
 jobs:
   build-image:
     runs-on: ubuntu-latest
@@ -30,7 +34,7 @@ jobs:
         with:
           context: .
           platforms: linux/amd64,linux/arm64
-          push: true
+          push: ${{ github.event_name != 'pull_request' }}
           tags: ${{ steps.meta.outputs.tags }}
           cache-from: type=registry,ref=tootsuite/mastodon:latest
           cache-to: type=inline

.github/workflows/check-i18n.yml

@@ -0,0 +1,34 @@
+name: Check i18n
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+env:
+  RAILS_ENV: test
+
+jobs:
+  check-i18n:
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Install system dependencies
+      run: |
+        sudo apt-get update
+        sudo apt-get install -y libicu-dev libidn11-dev
+    - name: Set up Ruby
+      uses: ruby/setup-ruby@v1
+      with:
+        ruby-version: '3.0'
+        bundler-cache: true
+    - name: Check locale file normalization
+      run: bundle exec i18n-tasks check-normalized
+    - name: Check for unused strings
+      run: bundle exec i18n-tasks unused -l en
+    - name: Check for wrong string interpolations
+      run: bundle exec i18n-tasks check-consistent-interpolations
+    - name: Check that all required locale files exist
+      run: bundle exec rake repo:check_locales_files