fix: add main to generate_repo.py (#2607)

JoeWang1127 · web-flow · commit fedeb3237b6d · 2024-03-27T21:04:40.000Z
In todays's nightly generation job ([log](https://github.com/googleapis/google-cloud-java/actions/runs/8457767424/job/23170489394)), no actual generation is done. I think this is because `main` method has been removed by #2598.
diff --git a/library_generation/generate_repo.py b/library_generation/generate_repo.py
@@ -155,3 +155,7 @@ def get_target_libraries(
         for library in config.libraries
         if library.get_library_name() in target_libraries
     ]
+
+
+if __name__ == "__main__":
+    main()

Original file line number	Diff line number	Diff line change
`@@ -155,3 +155,7 @@ def get_target_libraries(`
`155`	`155`	`for library in config.libraries`
`156`	`156`	`if library.get_library_name() in target_libraries`
`157`	`157`	`]`
	`158`	`+`
	`159`	`+`
	`160`	`+if __name__ == "__main__":`
	`161`	`+ main()`