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Fix new PR title to match github.com when branch has multiple commits #8773

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Fix new PR title to match github.com when branch has multiple commits #8773

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cb374cf
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Copilot Jun 8, 2026
e48b094
Use local git log as fallback for PR title commit count
Copilot Jun 8, 2026
2dc0b1f
Improve fallback debug log message
Copilot Jun 8, 2026
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22 changes: 17 additions & 5 deletions src/github/createPRViewProvider.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -786,13 +786,25 @@ export class CreatePullRequestViewProvider extends BaseCreatePullRequestViewProv
name ? titleAndBodyFrom(promiseWithTimeout(this._folderRepositoryManager.getTipCommitMessage(name), 5000)) : undefined,
descriptionSource === 'template' ? this.getPullRequestTemplate() : undefined
]);
const totalNonMergeCommits = totalCommits?.filter(commit => commit.parents.length < 2);
let totalNonMergeCommitsCount: number | undefined = totalCommits?.filter(commit => commit.parents.length < 2).length;

Logger.debug(`Total commits: ${totalNonMergeCommits?.length}`, CreatePullRequestViewProvider.ID);
if (totalNonMergeCommits === undefined) {
// There is no upstream branch. Use the last commit as the title and description.
// If we couldn't determine the number of commits from GitHub (e.g. no upstream, or the compare API
// call failed), fall back to the local git log so that we can still match github.com's behavior of
// using the branch name when there is more than one commit.
if (totalNonMergeCommitsCount === undefined) {
try {
const localCommits = await this.model.gitCommits();
totalNonMergeCommitsCount = localCommits.filter(commit => commit.parents.length < 2).length;
} catch (e) {
Logger.debug(`Failed to retrieve local git commits as fallback for PR title for branch ${name}: ${e}`, CreatePullRequestViewProvider.ID);
}
}

Logger.debug(`Total commits: ${totalNonMergeCommitsCount}`, CreatePullRequestViewProvider.ID);
if (totalNonMergeCommitsCount === undefined) {
// We couldn't determine the number of commits at all. Use the last commit as the title and description.
useBranchName = false;
} else if (totalNonMergeCommits && totalNonMergeCommits.length > 1) {
} else if (totalNonMergeCommitsCount > 1) {
const defaultBranch = await origin.getDefaultBranch();
useBranchName = defaultBranch !== compareBranch.name;
}
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