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

@@ -55,6 +55,7 @@ type commitInfo struct {
 	cfg               *config.Config
 	state             *config.LibrarianState
 	repo              gitrepo.Repository
+	sourceRepo        gitrepo.Repository
 	ghClient          GitHubClient
 	idToCommits       map[string]string
 	failedLibraries   []string
@@ -405,7 +406,7 @@ func addLabelsToPullRequest(ctx context.Context, ghClient GitHubClient, pullRequ
 func createPRBody(info *commitInfo) (string, error) {
 	switch info.prType {
 	case generate:
-		return formatGenerationPRBody(info.repo, info.state, info.idToCommits, info.failedLibraries)
+		return formatGenerationPRBody(info.sourceRepo, info.state, info.idToCommits, info.failedLibraries)
 	case release:
 		return formatReleaseNotes(info.repo, info.state)
 	default:

internal/librarian/generate.go

@@ -200,6 +200,7 @@ func (r *generateRunner) run(ctx context.Context) error {
 		cfg:             r.cfg,
 		state:           r.state,
 		repo:            r.repo,
+		sourceRepo:      r.sourceRepo,
 		ghClient:        r.ghClient,
 		idToCommits:     idToCommits,
 		failedLibraries: failedLibraries,

internal/librarian/release_init.go

@@ -87,6 +87,7 @@ func init() {
 type initRunner struct {
 	cfg             *config.Config
 	repo            gitrepo.Repository
+	sourceRepo      gitrepo.Repository
 	state           *config.LibrarianState
 	librarianConfig *config.LibrarianConfig
 	ghClient        GitHubClient
@@ -104,6 +105,7 @@ 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,
@@ -128,6 +130,7 @@ func (r *initRunner) run(ctx context.Context) error {
 		cfg:           r.cfg,
 		state:         r.state,
 		repo:          r.repo,
+		sourceRepo:    r.sourceRepo,
 		ghClient:      r.ghClient,
 		commitMessage: "chore: create a release",
 		prType:        release,