Method getFileInfo

src/lib/github-client.ts:175–215

* Check if a file exists and is within size limits

(
    owner: string,
    repo: string,
    path: string,
    ref?: string,
  )

   * Check if a file exists and is within size limits
   */
  async getFileInfo(
    owner: string,
    repo: string,
    path: string,
    ref?: string,
  ): Promise<GitHubFileEntry | null> {
    try {
      const { data } = await this.octokit.repos.getContent({
        owner,
        repo,
        path,
        ref,
      });

      // Ensure it's a file, not a directory
      if (Array.isArray(data)) {
        return null; // It's a directory
      }

      const parsed = GitHubFileEntrySchema.safeParse(data);
      if (!parsed.success) {
        return null;
      }

      if (parsed.data.size > MAX_FILE_SIZE) {
        throw new GitHubClientError(
          `File "${path}" exceeds maximum size limit of ${MAX_FILE_SIZE / 1024 / 1024}MB`,
        );
      }

      return parsed.data;
    } catch (error: unknown) {
      if (error instanceof RequestError && error.status === 404) {
        return null;
      }
      if (error instanceof GitHubClientError && error.statusCode === 404) {
        return null;
      }
      throw this.handleError(error);
    }
  }

  /**
   * Validate that a repository exists and is accessible