fix: generate command should parse the -push flag (#1744)

Fixes #1743

Author: chingor13

internal/librarian/flags.go

@@ -62,3 +62,7 @@ func addFlagWorkRoot(fs *flag.FlagSet, cfg *config.Config) {
 func addFlagPR(fs *flag.FlagSet, cfg *config.Config) {
 	fs.StringVar(&cfg.PullRequest, "pr", "", "a pull request to operate on. It should be in the format of a uri https://github.com/{owner}/{repo}/pull/{number}. If not specified, will search for all merged pull requests with the label `release:pending` in the last 30 days.")
 }
+
+func addFlagPush(fs *flag.FlagSet, cfg *config.Config) {
+	fs.BoolVar(&cfg.Push, "push", false, "whether to push the generated code")
+}

internal/librarian/generate.go

@@ -84,6 +84,7 @@ func init() {
 	addFlagLibrary(fs, cfg)
 	addFlagRepo(fs, cfg)
 	addFlagWorkRoot(fs, cfg)
+	addFlagPush(fs, cfg)
 }
 
 type generateRunner struct {