impl: automate reporting removal, build verification, and dynamic parent versioning

Author: meltsufin

monorepo-migration/migrate.sh

@@ -19,6 +19,7 @@ TARGET_DIR="$WORKING_DIR/$MONOREPO_NAME-target"
 # Get absolute path to the transformation script before any cd
 TRANSFORM_SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
 TRANSFORM_SCRIPT="$TRANSFORM_SCRIPT_DIR/transform_workflow.py"
+MODERNIZE_POM_SCRIPT="$TRANSFORM_SCRIPT_DIR/modernize_pom.py"
 
 echo "Starting migration using git read-tree with isolated clones..."
 
@@ -177,6 +178,19 @@ echo "Committing copyright header fixes..."
 git add "$SOURCE_REPO_NAME"
 git commit -n --no-gpg-sign -m "chore($SOURCE_REPO_NAME): update copyright headers to 2025 Google LLC"
 
+# 7.9 Modernize root pom.xml
+echo "Modernizing root pom.xml..."
+PARENT_VERSION=$(grep -m 1 "<version>.*{x-version-update:google-cloud-java:current}" google-cloud-jar-parent/pom.xml | sed -E 's/.*<version>(.*)<\/version>.*/\1/')
+python3 "$MODERNIZE_POM_SCRIPT" "$SOURCE_REPO_NAME/pom.xml" "$PARENT_VERSION"
+
+echo "Committing root pom.xml modernization..."
+git add "$SOURCE_REPO_NAME/pom.xml"
+git commit -n --no-gpg-sign -m "chore($SOURCE_REPO_NAME): modernize root pom.xml"
+
+# 7.10 Verify compilation
+echo "Verifying compilation..."
+(cd "$SOURCE_REPO_NAME" && mvn compile -DskipTests -T 1C)
+
 # 8. Cleanup
 echo "Cleaning up temporary source clone..."
 rm -rf "$SOURCE_DIR"

monorepo-migration/modernize_pom.py

@@ -0,0 +1,102 @@
+import sys
+import re
+
+def modernize_pom(file_path, parent_version):
+    with open(file_path, 'r') as f:
+        lines = f.readlines()
+
+    new_lines = []
+    in_parent = False
+    in_dep_mgmt = False
+    in_dependencies = False
+    in_dependency = False
+    in_reporting = False
+    current_dependency_lines = []
+    has_x_version_update = False
+
+    for line in lines:
+        # Parent section modernization
+        if '<parent>' in line and not in_parent:
+            in_parent = True
+            indent = line[:line.find('<')]
+            new_lines.append(f"{indent}<parent>\n")
+            new_lines.append(f"{indent}  <groupId>com.google.cloud</groupId>\n")
+            new_lines.append(f"{indent}  <artifactId>google-cloud-jar-parent</artifactId>\n")
+            new_lines.append(f"{indent}  <version>{parent_version}</version><!-- {{x-version-update:google-cloud-java:current}} -->\n")
+            new_lines.append(f"{indent}  <relativePath>../google-cloud-jar-parent/pom.xml</relativePath>\n")
+            continue
+        if '</parent>' in line and in_parent:
+            in_parent = False
+            new_lines.append(line)
+            continue
+        if in_parent:
+            continue # skip original parent content
+
+        # Dependency Management pruning
+        if '<dependencyManagement>' in line:
+            in_dep_mgmt = True
+            new_lines.append(line)
+            continue
+        if '</dependencyManagement>' in line:
+            in_dep_mgmt = False
+            new_lines.append(line)
+            continue
+        
+        if in_dep_mgmt:
+            if '<dependencies>' in line:
+                in_dependencies = True
+                new_lines.append(line)
+                continue
+            if '</dependencies>' in line:
+                in_dependencies = False
+                new_lines.append(line)
+                continue
+            
+            if in_dependencies:
+                if '<dependency>' in line:
+                    in_dependency = True
+                    current_dependency_lines = [line]
+                    has_x_version_update = False
+                    continue
+                if '</dependency>' in line:
+                    in_dependency = False
+                    current_dependency_lines.append(line)
+                    if has_x_version_update:
+                        new_lines.extend(current_dependency_lines)
+                    continue
+                
+                if in_dependency:
+                    current_dependency_lines.append(line)
+                    if '{x-version-update:' in line:
+                        has_x_version_update = True
+                    continue
+                
+                # Prune comments and extra whitespace in depMgmt for a cleaner result
+                if not line.strip():
+                    new_lines.append(line)
+                continue
+
+        # Reporting section removal
+        if '<reporting>' in line:
+            in_reporting = True
+            continue
+        if '</reporting>' in line:
+            in_reporting = False
+            continue
+        if in_reporting:
+            continue
+
+        new_lines.append(line)
+
+    with open(file_path, 'w') as f:
+        # Clean up double empty lines potentially introduced by pruning
+        content = "".join(new_lines)
+        content = re.sub(r'\n\s*\n\s*\n', '\n\n', content)
+        f.write(content)
+
+if __name__ == "__main__":
+    if len(sys.argv) > 2:
+        modernize_pom(sys.argv[1], sys.argv[2])
+    else:
+        print("Usage: python3 modernize_pom.py <file_path> <parent_version>")
+        sys.exit(1)