Method _watchOutputFiles

tools/isobuild/compiler-plugin.js:1496–1524

(jsOutputFilesMap)

  }

  static _watchOutputFiles(jsOutputFilesMap) {
    // Watch all output files produced by computeJsOutputFilesMap.
    jsOutputFilesMap.forEach(entry => {
      entry.files.forEach(file => {
        const {
          sourcePath,
          absPath = sourcePath &&
            files.pathJoin(entry.batch.sourceRoot, sourcePath),
        } = file;
        const { importScannerWatchSet } = entry;
        if (
          typeof absPath === "string" &&
          // Blindly calling importScannerWatchSet.addFile would be
          // logically correct here, but we can save the cost of calling
          // optimisticHashOrNull(absPath) if the importScannerWatchSet
          // already knows about the file and it has not been marked as
          // potentially unused.
          ! importScannerWatchSet.isDefinitelyUsed(absPath)
        ) {
          // If this file was previously added to the importScannerWatchSet
          // using the addPotentiallyUnusedFile method (see compileUnibuild),
          // calling addFile here will update its usage status to reflect that
          // the ImportScanner did, in fact, end up "using" the file.
          importScannerWatchSet.addFile(absPath, optimisticHashOrNull(absPath));
        }
      });
    });
    return jsOutputFilesMap;
  }

  static _warnAboutMissingModules(missingModules) {
    const topLevelMissingIDs = {};