feat: add task to automatically copy codegen files to paper

.github/workflows/check-paper-integrity.yml

@@ -0,0 +1,47 @@
+name: Test Paper Architecture integrity
+on: [pull_request]
+jobs:
+  check:
+    runs-on: ubuntu-latest
+    concurrency:
+      group: kotlin-lint-${{ github.ref }}
+      cancel-in-progress: true
+    steps:
+      - name: checkout
+        uses: actions/checkout@v2
+
+      - name: Use Java 17
+        uses: actions/setup-java@v3
+        with:
+          distribution: 'oracle'
+          java-version: '17'
+
+      - name: Use Node.js 18
+        uses: actions/setup-node@v2
+        with:
+          node-version: 18
+          cache: 'yarn'
+
+      - uses: actions/cache@v2
+        with:
+          path: '**/node_modules'
+          key: ${{ runner.os }}-modules-${{ hashFiles('**/yarn.lock') }}
+
+      - name: Install node dependencies
+        run: yarn install --frozen-lockfile
+
+      - name: Install node dependencies of FabricExample
+        run: (cd FabricExample && yarn install --frozen-lockfile)
+
+      - name: Restore build from cache
+        uses: actions/cache@v3
+        with:
+          path: |
+            ~/.gradle/caches
+            ~/.gradle/wrapper
+            android/build
+            android/.gradle
+          key: ${{ runner.os }}-kotlin-lint-gradle-${{ hashFiles('**/*.gradle*', '**/gradle-wrapper.properties', 'android/build.gradle') }}
+
+      - name: Check old arch integrity
+        run: yarn checkIntegrity

Example/android/gradle.properties

@@ -39,3 +39,5 @@ newArchEnabled=false
 # Use this property to enable or disable the Hermes JS engine.
 # If set to false, you will be using JSC instead.
 hermesEnabled=true
+
+isRNSVGExampleApp=true

FabricExample/android/gradle.properties

@@ -39,3 +39,5 @@ newArchEnabled=true
 # Use this property to enable or disable the Hermes JS engine.
 # If set to false, you will be using JSC instead.
 hermesEnabled=true
+
+isRNSVGExampleApp=true

TestsExample/android/gradle.properties

@@ -39,3 +39,5 @@ newArchEnabled=false
 # Use this property to enable or disable the Hermes JS engine.
 # If set to false, you will be using JSC instead.
 hermesEnabled=true
+
+isRNSVGExampleApp=true

android/build.gradle

@@ -93,3 +93,107 @@ repositories {
 dependencies {
     implementation 'com.facebook.react:react-native:+'
 }
+
+def isRNSVGExampleApp() {
+    return project.hasProperty('isRNSVGExampleApp') && project.property('isRNSVGExampleApp') == "true"
+}
+
+def getAbsoluteCodegenArtifactsPaperDestination() {
+    if (!project.hasProperty('codegenArtifactsPaperDestination')) {
+        throw new Exception('[RNSVG] Please fill codegenArtifactsPaperDestination variable in android/gradle.properties to point to the correct path to generated specs for paper')
+    }
+
+    return "${project.rootDir}/../../${project.property('codegenArtifactsPaperDestination')}"
+}
+
+def getAbsoluteCodegenArtifactsSource() {
+    if (!project.hasProperty('codegenArtifactsSource')) {
+        throw new Exception('[RNSVG] Please fill codegenArtifactsSource variable in android/gradle.properties to point to the correct path to codegenerated artifacts')
+    }
+
+    return "${project.rootDir}/../../${project.property('codegenArtifactsSource')}"
+}
+
+
+tasks.register('copyCodegenArtifacts') {
+    group 'After build tasks'
+    description 'Task which copies codegen artifacts to paper architecture'
+
+    if (!isRNSVGExampleApp() || !isNewArchitectureEnabled()) {
+        return
+    }
+
+    dependsOn tasks.generateCodegenArtifactsFromSchema
+
+    doLast {
+
+        def absoluteCodegenArtifactsPaperDestination = getAbsoluteCodegenArtifactsPaperDestination()
+        def absoluteCodegenArtifactsSource = getAbsoluteCodegenArtifactsSource()
+
+        def existingFiles = fileTree(absoluteCodegenArtifactsPaperDestination).matching {
+            include '**/*.java'
+        }
+
+        def generatedFiles = fileTree(absoluteCodegenArtifactsSource).matching {
+            include '**/*.java'
+        }
+
+        def existingFilesMap = [:]
+
+        existingFiles.forEach { existingFile ->
+            existingFilesMap[existingFile.name] = 1
+        }
+
+        generatedFiles.forEach { generatedFile -> 
+            if (!existingFilesMap.containsKey(generatedFile.name)) {
+                logger.warn("[RNSVG] ${generatedFile.name} not found in paper dir, if it's used on Android you need to copy it manually and implement yourself before using auto-copy feature.")
+            }
+        }
+
+        if (existingFiles.size() == 0) {
+            logger.warn("[RNSVG] Paper destination with codegen interfaces is empty. This might be okay if you don't have any interfaces/delegates used on Android, but if that's not the case please check if codegenArtifactsPaperDestination property in android/gradle.properties is correct.")
+        }
+
+        existingFiles.forEach { existingFile -> 
+            def generatedFile = new File("${absoluteCodegenArtifactsSource}/${existingFile.name}")
+
+            if (!generatedFile.exists()) {
+                logger.warn("[RNSVG] ${existingFile.name} file does not exist in codegen artifacts source destination. Please check if you still need this interface/delagete.")
+            }
+        }
+
+        copy {
+            from absoluteCodegenArtifactsSource
+            include existingFiles.collect { it.name }
+            into absoluteCodegenArtifactsPaperDestination
+        }
+    }
+}
+
+if (isRNSVGExampleApp() && isNewArchitectureEnabled() && !project.hasProperty('skipCodegenCopyTask')) {
+    tasks.generateCodegenArtifactsFromSchema.finalizedBy('copyCodegenArtifacts')
+}
+
+tasks.register('checkIntegrityBetweenArchitectures') {
+    group 'Verification tasks'
+    description 'Task to check integrity between fabric and paper architecture in terms of codegen generated interfaces/delegates'
+
+    if (isRNSVGExampleApp()) {
+        return
+    }
+
+    def absoluteCodegenArtifactsPaperDestination = "../${project.property('codegenArtifactsPaperDestination')}"
+    def absoluteCodegenArtifactsSource = "../${project.property('codegenArtifactsSource')}"
+
+    def existingFiles = fileTree(absoluteCodegenArtifactsPaperDestination).matching {
+        include '**/*.java'
+    }
+
+    existingFiles.forEach { existingFile -> 
+        def generatedFile = new File("${absoluteCodegenArtifactsSource}/${existingFile.name}")
+
+        if (existingFile.text != generatedFile.text) {
+            throw new RuntimeException("RNSVG] The source of ${existingFile.name} does not match with the one generated by codegen. Please check if you commited changes produced by copyCodegenArtifacts task.")
+        }
+    }
+}

android/gradle.properties

@@ -0,0 +1,6 @@
+# Path to codegen output directory with this library view managers' interfaces & delegates. Used by `copyCodegenArtifacts` task that helps to synchronize newly generated files with their Paper counterparts.
+codegenArtifactsSource=android/build/generated/source/codegen/java/com/facebook/react/viewmanagers
+
+# Path to directory with view managers' interfaces & delegates used while running on Paper architecture. This property is used as the output path for `copyCodegenArtifacts` task.
+# Used by copyCodegenArtifacts task that automates copying those interfaces/delegates after codegen is run.
+codegenArtifactsPaperDestination=android/src/paper/java/com/facebook/react/viewmanagers

package.json

@@ -56,7 +56,8 @@
     "prepare": "npm run bob && husky install",
     "release": "npm login && release-it",
     "test": "npm run lint && npm run tsc",
-    "tsc": "tsc --noEmit"
+    "tsc": "tsc --noEmit",
+    "checkIntegrity": "(cd ./FabricExample/android && ./gradlew generateCodegenArtifactsFromSchema -PskipCodegenCopyTask) && (cd ./android && ./gradlew checkIntegrityBetweenArchitectures)"
   },
   "peerDependencies": {
     "react": "*",