Source maps support (#61)

Fixes #53
NMFR · Jun 26, 2018 · 15a41c8 · 15a41c8
1 parent d084a55
commit 15a41c8
Showing 1 changed file with 17 additions and 14 deletions.
diff --git a/src/index.js b/src/index.js
@@ -30,33 +30,36 @@ class OptimizeCssAssetsWebpackPlugin extends LastCallWebpackPlugin {
  }
 
  processCss(assetName, asset, assets) {
- const css = asset.source();
+ const css = asset.sourceAndMap ? asset.sourceAndMap() : { source: asset.source() };
  const processOptions = Object.assign(
  { from: assetName, to: assetName },
- this.options.cssProcessorOptions || {}
+ this.options.cssProcessorOptions
  );
 
  if (processOptions.map && !processOptions.map.prev) {
  try {
- const mapJson = assets.getAsset(assetName + '.map');
- if (mapJson) {
- const map = JSON.parse(mapJson);
- if (
- map &&
- (
- (map.sources && map.sources.length > 0) ||
- (map.mappings && map.mappings.length > 0)
- )
- ) {
- processOptions.map = Object.assign({ prev: mapJson }, processOptions.map);
+ let map = css.map;
+ if (!map) {
+ const mapJson = assets.getAsset(assetName + '.map');
+ if (mapJson) {
+ map = JSON.parse(mapJson);
  }
  }
+ if (
+ map &&
+ (
+ (map.sources && map.sources.length > 0) ||
+ (map.mappings && map.mappings.length > 0)
+ )
+ ) {
+ processOptions.map = Object.assign({ prev: map }, processOptions.map);
+ }
  } catch (err) {
  console.warn('OptimizeCssAssetsPlugin.processCss() Error getting previous source map', err);
  }
  }
  return this.options
- .cssProcessor.process(css, processOptions)
+ .cssProcessor.process(css.source, processOptions)
  .then(r => {
  if (processOptions.map && r.map && r.map.toString) {
  assets.setAsset(assetName + '.map', r.map.toString());