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import { dirname, ensureDir, join, sprintf } from "./deps.ts";import { ISource, Source } from "./source.ts";
export class SourceFile extends Source implements ISource {  /**   * @param filePath The absolute filepath to the file.   * @param rootPath The absolute filepath to the root of this file.   */  constructor(filePath: string, rootPath: string) {    super(filePath, rootPath);  }
  /**   * @param to The absolute path to copy the file to.   * @returns An unlocked source file of the copied file.   */  async copyTo(    to: string,    filepath = this.relativePath(),  ): Promise<SourceFile> {    const destination = join(to, filepath);
    if (destination === this.path()) {      throw new Error(sprintf("cannot copy a file to itself: %s", this.path()));    }
    await ensureDir(dirname(destination));    await Deno.copyFile(this.path(), destination);
    const sourceFile = new SourceFile(destination, to);
    /**     * This file has been copied, so we can safely unlock it.     */    sourceFile.unlock();
    return sourceFile;  }}