Fixes webpack-contrib#65: Add emitErrors option

This option allows you to log errors as warnings, preventing
Webpack dev server from aborting compilation.

README.md

@@ -44,6 +44,7 @@ See [stylelint options](http://stylelint.io/user-guide/node-api/#options) for th
 
 * `configFile`: You can change the config file location. Default: (`undefined`), handled by [stylelint's cosmiconfig module](http://stylelint.io/user-guide/configuration/).
 * `context`: String indicating the root of your SCSS files. Default: inherits from webpack config.
+* `emitErrors`: Display Stylelint errors as actual errors, rather than just warnings. Default: `true`
 * `failOnError`: Have Webpack's build process die on error. Default: `false`
 * `files`: Change the glob pattern for finding files. Default: (`['**/*.s?(a|c)ss']`)
 * `formatter`: Use a custom formatter to print errors to the console. Default: (`require('stylelint').formatters.string`)

lib/run-compilation.js

@@ -46,7 +46,11 @@ module.exports = function runCompilation (options, compiler, done) {
     }
 
     if (errors.length) {
-      compilation.errors.push(chalk.red(options.formatter(errors)));
+      if (options.emitErrors === false) {
+        compilation.warnings.push(chalk.yellow(options.formatter(errors)));
+      } else {
+        compilation.errors.push(chalk.red(options.formatter(errors)));
+      }
       errors = [];
     }
 

test/index.test.js

@@ -57,6 +57,65 @@ describe('stylelint-webpack-plugin', function () {
       });
   });
 
+  it('emits errors as warnings when asked to', function () {
+    var config = {
+      context: './test/fixtures/single-error',
+      entry: './index',
+      plugins: [
+        new StyleLintPlugin({
+          configFile: configFilePath,
+          quiet: true,
+          emitErrors: false
+        })
+      ]
+    };
+
+    return pack(assign({}, baseConfig, config))
+      .then(function (stats) {
+        expect(stats.compilation.errors).to.have.length(0);
+        expect(stats.compilation.warnings).to.have.length(1);
+      });
+  });
+
+  it('does not emit errors as warnings when asked not to', function () {
+    var config = {
+      context: './test/fixtures/single-error',
+      entry: './index',
+      plugins: [
+        new StyleLintPlugin({
+          configFile: configFilePath,
+          quiet: true,
+          emitErrors: true
+        })
+      ]
+    };
+
+    return pack(assign({}, baseConfig, config))
+      .then(function (stats) {
+        expect(stats.compilation.errors).to.have.length(1);
+        expect(stats.compilation.warnings).to.have.length(0);
+      });
+  });
+
+  it('does not emit errors as warnings when not asked to', function () {
+    var config = {
+      context: './test/fixtures/single-error',
+      entry: './index',
+      plugins: [
+        new StyleLintPlugin({
+          configFile: configFilePath,
+          quiet: true
+        })
+      ]
+    };
+
+    return pack(assign({}, baseConfig, config))
+      .then(function (stats) {
+        expect(stats.compilation.errors).to.have.length(1);
+        expect(stats.compilation.warnings).to.have.length(0);
+      });
+  });
+
   it('works with multiple source files', function () {
     var config = {
       context: './test/fixtures/multiple-sources',