Function projectFile

packages/core/schematics/utils/tsurge/project_paths.ts:95–122

(
  file: ts.SourceFile | AbsoluteFsPath,
  {sortedRootDirs, projectRoot}: Pick<ProgramInfo, 'sortedRootDirs' | 'projectRoot'>,
)

 * See {@link ProjectFile}.
 */
export function projectFile(
  file: ts.SourceFile | AbsoluteFsPath,
  {sortedRootDirs, projectRoot}: Pick<ProgramInfo, 'sortedRootDirs' | 'projectRoot'>,
): ProjectFile {
  const fs = getFileSystem();
  const filePath = fs.resolve(typeof file === 'string' ? file : file.fileName);

  // Sorted root directories are sorted longest to shortest. First match
  // is the appropriate root directory for ID computation.
  for (const rootDir of sortedRootDirs) {
    if (!isWithinBasePath(fs, rootDir, filePath)) {
      continue;
    }
    return {
      id: fs.relative(rootDir, filePath) as string as ProjectFileID,
      rootRelativePath: fs.relative(projectRoot, filePath) as string as ProjectRootRelativePath,
    };
  }

  // E.g. project directory may be `src/`, but files may be looked up
  // from `node_modules/`. This is fine, but in those cases, no root
  // directory matches.
  const rootRelativePath = fs.relative(projectRoot, filePath);
  return {
    id: rootRelativePath as string as ProjectFileID,
    rootRelativePath: rootRelativePath as string as ProjectRootRelativePath,
  };
}

/**
 * Whether `path` is a descendant of the `base`?