Function parseDiffGitHeader

packages/shared/diff-paths.ts:66–87

(header: string)

}

export function parseDiffGitHeader(header: string): DiffPathPair {
  const prefix = "diff --git ";
  if (!header.startsWith(prefix)) return {};

  const rest = header.slice(prefix.length);
  if (rest.trimStart().startsWith('"')) {
    const first = scanHeaderToken(rest);
    const second = first ? scanHeaderToken(first.rest) : null;
    if (first && second) {
      const oldPath = parsePatchPathToken(first.token, "a");
      const newPath = parsePatchPathToken(second.token, "b");
      return {
        oldPath: oldPath && oldPath !== "/dev/null" ? oldPath : undefined,
        newPath: newPath && newPath !== "/dev/null" ? newPath : undefined,
      };
    }
  }

  const match = header.match(/^diff --git a\/(.+) b\/(.+)$/);
  if (!match) return {};
  return { oldPath: match[1], newPath: match[2] };
}

export function formatPatchPathToken(side: "a" | "b", filePath: string): string {
  if (filePath === "/dev/null") return filePath;