add getFileChangesMultiDiffPart trace logging (microsoft/vscode#265170) (#7768)

Author: joshspicer

src/github/copilotRemoteAgent.ts

@@ -1306,13 +1306,15 @@ export class CopilotRemoteAgentManager extends Disposable {
 	private async getFileChangesMultiDiffPart(pullRequest: PullRequestModel): Promise<vscode.ChatResponseMultiDiffPart | undefined> {
 		try {
 			const changeModels = await this.getChangeModels(pullRequest);
+			Logger.warn('No file changes found for pull request, not showing diff.', CopilotRemoteAgentManager.ID);
 			if (changeModels.length === 0) {
 				return undefined;
 			}
 
 			const diffEntries: vscode.ChatResponseDiffEntry[] = [];
 			for (const changeModel of changeModels) {
 				const { added, removed } = await changeModel.calculateChangedLinesCount();
+				Logger.trace(`DiffEntry -> original='${changeModel.parentFilePath}' modified='${changeModel.filePath}' (+${added} -${removed})`, CopilotRemoteAgentManager.ID);
 				diffEntries.push({
 					originalUri: changeModel.parentFilePath,
 					modifiedUri: changeModel.filePath,

src/github/pullRequestModel.ts

@@ -1530,6 +1530,7 @@ export class PullRequestModel extends IssueModel<PullRequest> implements IPullRe
 
 		if (!this.base) {
 			Logger.appendLine('No base branch found for PR, fetching it now', PullRequestModel.ID);
+			Logger.trace(`Fetching from ${remote.owner}/${remote.repositoryName}. PR #${this.number}`, PullRequestModel.ID);
 			const info = await octokit.call(octokit.api.pulls.get, {
 				owner: remote.owner,
 				repo: remote.repositoryName,