chore: drop api.json from repo, generate instead (#133)

.github/workflows/verify_api.yml

@@ -0,0 +1,43 @@
+name: Verify API
+on:
+  push:
+    branches: [ master ]
+    paths:
+      - 'scripts/*'
+      - 'api-generator/*'
+  pull_request:
+    branches: [ master ]
+    paths:
+      - 'scripts/**'
+      - 'api-generator/**'
+jobs:
+  verify:
+    timeout-minutes: 30
+    strategy:
+      fail-fast: true
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Cache Maven packages
+        uses: actions/cache@v2
+        with:
+          path: ~/.m2
+          key: ${{ runner.os }}-m2-${{ hashFiles('**/pom.xml') }}
+          restore-keys: ${{ runner.os }}-m2
+      - name: Cache Downloaded Drivers
+        uses: actions/cache@v2
+        with:
+          path: driver-bundle/src/main/resources/driver
+          key: ${{ runner.os }}-drivers-${{ hashFiles('scripts/*') }}
+          restore-keys: ${{ runner.os }}-drivers
+      - name: Download drivers
+        run: scripts/download_driver_for_all_platforms.sh
+      - name: Regenerate APIs
+        run: scripts/generate_api.sh
+      - name: Verify API is up to date
+        run: |
+          if [[ -n $(git status -s) ]]; then
+            echo "ERROR: generated interfaces differ from the current sources:"
+            git diff
+            exit 1
+          fi

CONTRIBUTING.md

@@ -28,7 +28,13 @@ mvn test
 
 ### Generating API
 
-Public Java API is generated from [api.json](https://github.com/microsoft/playwright-java/blob/master/api-generator/src/main/resources/api.json) which in turn is created by `playwright-cli print-api-json`.
+Public Java API is generated from api.json which is produced by `playwright-cli print-api-json`. To regenerate
+Java interfaces for the current driver run the following commands:
+
+```bash
+./scripts/download_driver_for_all_platforms.sh
+./scripts/generate_api.sh
+```
 
 ### Code Style
 

api-generator/src/main/resources/.gitignore

@@ -0,0 +1 @@
+api.json

scripts/generate_api.sh

@@ -9,7 +9,7 @@ cd "$(dirname $0)/.."
 echo "Updating api.json"
 ./driver-bundle/src/main/resources/driver/linux/playwright-cli print-api-json > ./api-generator/src/main/resources/api.json
 
-mvn compile -projects api-generator
+mvn compile -projects api-generator --no-transfer-progress
 
 echo "Regenerating Java interfaces"
 mvn exec:java --projects api-generator -Dexec.mainClass=com.microsoft.playwright.tools.ApiGenerator