Function parseFileForInstallTargets

snowpack/src/scan-imports.ts:195–250

({
  locOnDisk,
  baseExt,
  contents,
  root,
}: SnowpackSourceFile<string>)

}

function parseFileForInstallTargets({
  locOnDisk,
  baseExt,
  contents,
  root,
}: SnowpackSourceFile<string>): InstallTarget[] {
  const relativeLoc = path.relative(root, locOnDisk);

  try {
    switch (baseExt as ScannableExt) {
      case '.css':
      case '.less':
      case '.sass':
      case '.scss': {
        logger.debug(`Scanning ${relativeLoc} for imports as CSS`);
        return parseCssForInstallTargets(contents);
      }
      case '.html':
      case '.svelte':
      case '.interface':
      case '.vue': {
        logger.debug(`Scanning ${relativeLoc} for imports as HTML`);
        return [
          ...parseCssForInstallTargets(extractCssFromHtml(contents)),
          ...parseJsForInstallTargets(extractJsFromHtml({contents, baseExt})),
        ];
      }
      case '.astro': {
        logger.debug(`Scanning ${relativeLoc} for imports as Astro`);
        return [
          ...parseCssForInstallTargets(extractCssFromHtml(contents)),
          ...parseJsForInstallTargets(extractJsFromAstro(contents)),
        ];
      }
      case '.cjs':
      case '.js':
      case '.jsx':
      case '.mjs':
      case '.ts':
      case '.tsx': {
        logger.debug(`Scanning ${relativeLoc} for imports as JS`);
        return parseJsForInstallTargets(contents);
      }
      default: {
        logger.debug(
          `Skip scanning ${relativeLoc} for imports (unknown file extension ${baseExt})`,
        );
        return [];
      }
    }
  } catch (err) {
    // Another error! No hope left, just abort.
    logger.error(`! ${locOnDisk}`);
    throw err;
  }
}

/** Extract only JS within <script type="module"> tags (works for .svelte and .vue files, too) */