angular-cli_utils.js

import fs from 'fs';
import { basename, dirname, normalize, relative, resolve } from '@angular-devkit/core';

function isDirectory(assetPath) {
  try {
    return fs.statSync(assetPath).isDirectory();
  } catch (e) {
    return false;
  }
}

function getAssetsParts(resolvedAssetPath, assetPath) {
  if (isDirectory(resolvedAssetPath)) {
    return {
      glob: '**/*', // Folders get a recursive star glob.
      input: assetPath, // Input directory is their original path.
    };
  }

  return {
    glob: basename(assetPath), // Files are their own glob.
    input: dirname(assetPath), // Input directory is their original dirname.
  };
}

export function isBuildAngularInstalled() {
  try {
    require.resolve('@angular-devkit/build-angular');
    return true;
  } catch (e) {
    return false;
  }
}

export function normalizeAssetPatterns(assetPatterns, dirToSearch, sourceRoot) {
  if (!assetPatterns || !assetPatterns.length) {
    return [];
  }

  return assetPatterns.map(assetPattern => {
    const assetPath = normalize(assetPattern);
    const resolvedSourceRoot = resolve(dirToSearch, sourceRoot);
    const resolvedAssetPath = resolve(dirToSearch, assetPath);
    const parts = getAssetsParts(resolvedAssetPath, assetPath);

    // Output directory for both is the relative path from source root to input.
    const output = relative(resolvedSourceRoot, resolve(dirToSearch, parts.input));

    // Return the asset pattern in object format.
    return {
      ...parts,
      output,
    };
  });
}