Method prettyPrint

src/adapter/source.ts:222–263

* Pretty-prints the source. Generates a beauitified source map if possible * and it hasn't already been done, and returns the created map and created * ephemeral source. Returns undefined if the source can't be beautified.

()

   * ephemeral source. Returns undefined if the source can't be beautified.
   */
  public async prettyPrint(): Promise<{ map: SourceMap; source: Source } | undefined> {
    if (!this._container) {
      return undefined;
    }

    if (
      isSourceWithSourceMap(this)
      && this.sourceMap.metadata.sourceMapUrl.endsWith('-pretty.map')
    ) {
      const map = this.sourceMap.value.settledValue;
      // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
      return map && { map, source: [...this.sourceMap.sourceByUrl!.values()][0] };
    }

    const content = await this.content();
    if (!content) {
      return undefined;
    }

    // Eval'd scripts have empty urls, give them a temporary one for the purpose
    // of the sourcemap. See #929
    const baseUrl = this.url || `eval://${this.sourceReference}.js`;
    const sourceMapUrl = baseUrl + '-pretty.map';
    const basename = baseUrl.split(/[\/\\]/).pop() as string;
    const fileName = basename + '-pretty.js';
    const map = await prettyPrintAsSourceMap(fileName, content, baseUrl, sourceMapUrl);
    if (!map) {
      return undefined;
    }

    // Note: this overwrites existing source map.
    this.setSourceMapUrl({
      compiledPath: this.absolutePath,
      sourceMapUrl: '',
    });
    (this.sourceMap as ISourceMapLocationProvider).value.resolve(map);

    const asCompiled = this as ISourceWithMap;
    await this._container._addSourceMapSources(asCompiled, map);
    // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
    return { map, source: [...asCompiled.sourceMap.sourceByUrl.values()][0] };
  }

  /**
   * Returns a DAP representation of the source.