fix(librarian): generate PR body (#2009)

Fixes an issue where the generate PR body parsing code was referencing
the wrong repo.

Tested: codyoss/google-cloud-go#4
Fixes: #1972

Author: codyoss

internal/librarian/command.go

@@ -53,9 +53,11 @@ type ContainerClientFactory func(workRoot, image, userUID, userGID string) (Cont
 
 // CommitInfo stores the fields used to create a commit locally.
 type CommitInfo struct {
-	cfg           *config.Config
-	state         *config.LibrarianState
-	repo          gitrepo.Repository
+	cfg        *config.Config
+	state      *config.LibrarianState
+	repo       gitrepo.Repository
+	sourceRepo gitrepo.Repository
+
 	ghClient      GitHubClient
 	branch        string
 	commitMessage string

internal/librarian/generate.go

@@ -204,6 +204,7 @@ func (r *generateRunner) run(ctx context.Context) error {
 		cfg:           r.cfg,
 		state:         r.state,
 		repo:          r.repo,
+		sourceRepo:    r.sourceRepo,
 		ghClient:      r.ghClient,
 		branch:        branch,
 		commitMessage: "chore: generate libraries",

internal/librarian/release_init.go

@@ -90,6 +90,7 @@ func init() {
 type initRunner struct {
 	cfg             *config.Config
 	repo            gitrepo.Repository
+	sourceRepo      gitrepo.Repository
 	state           *config.LibrarianState
 	librarianConfig *config.LibrarianConfig
 	ghClient        GitHubClient
@@ -107,6 +108,7 @@ func newInitRunner(cfg *config.Config) (*initRunner, error) {
 	return &initRunner{
 		cfg:             runner.cfg,
 		repo:            runner.repo,
+		sourceRepo:      runner.sourceRepo,
 		state:           runner.state,
 		librarianConfig: runner.librarianConfig,
 		ghClient:        runner.ghClient,
@@ -144,6 +146,7 @@ func (r *initRunner) run(ctx context.Context) error {
 		cfg:           r.cfg,
 		state:         r.state,
 		repo:          r.repo,
+		sourceRepo:    r.sourceRepo,
 		ghClient:      r.ghClient,
 		branch:        branch,
 		commitMessage: "chore: create a release",