renameExistingFileToOld method

void renameExistingFileToOld(AFCommandContext context, List<String> projectPath)

Renames an existing file with .old

Implementation

void renameExistingFileToOld(AFCommandContext context, List<String> projectPath) {
  if(!AFProjectPaths.projectFileExists(projectPath)) {
     throw AFCommandError(error: "Expected to find file at $projectPath but did not.");
  }

  final filename = projectPath.last;
  final idxSuffix = filename.lastIndexOf('.');
  if(idxSuffix < 0) {
    throw AFException("Expected $filename to have a . extension");
  }

  final renamedFilename = StringBuffer(filename.substring(0, idxSuffix));
  renamedFilename.write(".old");
  final revisedPath = List<String>.from(projectPath);
  revisedPath.removeLast();
  revisedPath.add(renamedFilename.toString());
  if(AFProjectPaths.projectFileExists(revisedPath)) {
    throw AFCommandError(error: "Need to rename $projectPath to $revisedPath, but the destination already exists");
  }

  renamed[projectPath] = revisedPath;
}