fix(@angular/cli): ensure stylesheet relative tilde path conversion

Author: clydin

package-lock.json

@@ -76,7 +76,7 @@
     "opn": "~5.1.0",
     "portfinder": "~1.0.12",
     "postcss-custom-properties": "^6.1.0",
-    "postcss-loader": "^2.0.8",
+    "postcss-loader": "^2.0.10",
     "postcss-url": "^7.1.2",
     "raw-loader": "^0.5.1",
     "resolve": "^1.1.7",

package.json

@@ -29,6 +29,12 @@ const customProperties = require('postcss-custom-properties');
  * require('sass-loader')
  */
 
+interface PostcssUrlAsset {
+  url: string;
+  hash: string;
+  absolutePath: string;
+}
+
 export function getStylesConfig(wco: WebpackConfigOptions) {
   const { projectRoot, buildOptions, appConfig } = wco;
 
@@ -47,7 +53,7 @@ export function getStylesConfig(wco: WebpackConfigOptions) {
   const baseHref = wco.buildOptions.baseHref || '';
   const deployUrl = wco.buildOptions.deployUrl || '';
 
-  const postcssPluginCreator = function() {
+  const postcssPluginCreator = function(loader: webpack.loader.LoaderContext) {
     // safe settings based on: https://github.com/ben-eb/cssnano/issues/358#issuecomment-283696193
     const importantCommentRe = /@preserve|@licen[cs]e|[@#]\s*source(?:Mapping)?URL|^!/i;
     const minimizeOptions = {
@@ -59,14 +65,17 @@ export function getStylesConfig(wco: WebpackConfigOptions) {
 
     return [
       postcssUrl({
-        filter: ({ url }: { url: string }) => url.startsWith('~'),
-        url: ({ url }: { url: string }) => path.join(projectRoot, 'node_modules', url.substr(1)),
+        filter: ({ url }: PostcssUrlAsset) => url.startsWith('~'),
+        url: ({ url }: PostcssUrlAsset) => {
+          const fullPath = path.join(projectRoot, 'node_modules', url.substr(1));
+          return path.relative(loader.context, fullPath).replace(/\\/g, '/');
+        }
       }),
       postcssUrl([
         {
           // Only convert root relative URLs, which CSS-Loader won't process into require().
-          filter: ({ url }: { url: string }) => url.startsWith('/') && !url.startsWith('//'),
-          url: ({ url }: { url: string }) => {
+          filter: ({ url }: PostcssUrlAsset) => url.startsWith('/') && !url.startsWith('//'),
+          url: ({ url }: PostcssUrlAsset) => {
             if (deployUrl.match(/:\/\//) || deployUrl.startsWith('/')) {
               // If deployUrl is absolute or root relative, ignore baseHref & use deployUrl as is.
               return `${deployUrl.replace(/\/$/, '')}${url}`;
@@ -83,7 +92,7 @@ export function getStylesConfig(wco: WebpackConfigOptions) {
         },
         {
           // TODO: inline .cur if not supporting IE (use browserslist to check)
-          filter: (asset: any) => !asset.hash && !asset.absolutePath.endsWith('.cur'),
+          filter: (asset: PostcssUrlAsset) => !asset.hash && !asset.absolutePath.endsWith('.cur'),
           url: 'inline',
           // NOTE: maxSize is in KB
           maxSize: 10

packages/@angular/cli/models/webpack-configs/styles.ts

@@ -61,7 +61,7 @@
     "opn": "~5.1.0",
     "portfinder": "~1.0.12",
     "postcss-custom-properties": "^6.1.0",
-    "postcss-loader": "^2.0.8",
+    "postcss-loader": "^2.0.10",
     "postcss-url": "^7.1.2",
     "raw-loader": "^0.5.1",
     "resolve": "^1.1.7",

packages/@angular/cli/package.json

@@ -20,7 +20,7 @@ export default function () {
     .then(() => silentNpm('install', 'font-awesome@4.7.0'))
     .then(() => writeMultipleFiles({
       'src/styles.scss': `
-        $fa-font-path: "~font-awesome/font";
+        $fa-font-path: "~font-awesome/fonts";
         @import "~font-awesome/scss/font-awesome";
         h1 { background: url('./assets/large.png'); }
         h2 { background: url('./assets/small.svg'); }