feat: allow customize mainFields and extensions (#710)

lib/loader.js

@@ -40,8 +40,8 @@ function sassLoader(content) {
   // Supported since v4.27.0
   if (this.getResolve) {
     resolve = this.getResolve({
-      mainFields: ['sass', 'main'],
-      extensions: ['.scss', '.sass', '.css'],
+      mainFields: ['sass', 'style', '...'],
+      extensions: ['.scss', '.sass', '.css', '...'],
     });
   }
 

test/index.test.js

@@ -61,7 +61,7 @@ implementations.forEach((implementation) => {
       .replace(CR, '');
   }
 
-  function runWebpack(baseConfig, loaderOptions, done) {
+  function runWebpack(baseConfig, loaderOptions, resolveOptions = {}, done) {
     const webpackConfig = merge(
       {
         mode: 'development',
@@ -74,6 +74,7 @@ implementations.forEach((implementation) => {
           rules: [
             {
               test: /\.s[ac]ss$/,
+              resolve: resolveOptions,
               use: [
                 { loader: 'raw-loader' },
                 {
@@ -100,7 +101,7 @@ implementations.forEach((implementation) => {
 
   describe(implementationName, () => {
     syntaxStyles.forEach((ext) => {
-      function execTest(testId, loaderOptions, webpackOptions) {
+      function execTest(testId, loaderOptions, webpackOptions, resolveOptions) {
         const bundleName = `bundle.${ext}.${implementationName}.js`;
 
         return new Promise((resolve, reject) => {
@@ -114,7 +115,7 @@ implementations.forEach((implementation) => {
             webpackOptions
           );
 
-          runWebpack(baseConfig, loaderOptions, (err) =>
+          runWebpack(baseConfig, loaderOptions, resolveOptions, (err) =>
             err ? reject(err) : resolve()
           );
         }).then(() => {
@@ -173,6 +174,17 @@ implementations.forEach((implementation) => {
             ));
           it('should resolve sass field correctly', () =>
             execTest(`import-sass-field`));
+          it('should resolve style field correctly', () =>
+            execTest(`import-style-field`));
+          it('should resolve main field correctly', () =>
+            execTest(`import-main-field`));
+          it('should resolve custom-sass field correctly', () =>
+            execTest(
+              `import-custom-sass-field`,
+              {},
+              {},
+              { mainFields: ['custom-sass', '...'] }
+            ));
           // Works only in dart-sass implementation
           if (implementation === dartSass) {
             it('should resolve index file in module correctly', () =>
@@ -280,6 +292,7 @@ implementations.forEach((implementation) => {
                 },
               },
               {},
+              {},
               (err) => (err ? reject(err) : resolve())
             );
           }).then(() => {
@@ -392,6 +405,7 @@ implementations.forEach((implementation) => {
               entry: pathToErrorFile,
             },
             {},
+            {},
             (err) => {
               if (implementation === nodeSass) {
                 err.message.should.match(
@@ -413,6 +427,7 @@ implementations.forEach((implementation) => {
               entry: pathToErrorImport,
             },
             {},
+            {},
             (err) => {
               // check for file excerpt
               if (implementation === nodeSass) {
@@ -435,6 +450,7 @@ implementations.forEach((implementation) => {
               entry: pathToErrorFileNotFound,
             },
             {},
+            {},
             (err) => {
               err.message.should.match(/@import "does-not-exist";/);
               if (implementation === nodeSass) {
@@ -457,6 +473,7 @@ implementations.forEach((implementation) => {
               entry: pathToErrorFileNotFound2,
             },
             {},
+            {},
             (err) => {
               err.message.should.match(/@import "\.\/another\/_module\.scss";/);
               if (implementation === nodeSass) {
@@ -500,6 +517,7 @@ implementations.forEach((implementation) => {
               entry: `${pathToSassLoader}!${pathToErrorFile}`,
             },
             { implementation: null },
+            {},
             (err) => {
               // eslint-disable-next-line no-underscore-dangle
               module._resolveFilename = originalResolve;
@@ -518,6 +536,7 @@ implementations.forEach((implementation) => {
             {
               implementation: merge(nodeSass, { info: 'asdfj' }),
             },
+            {},
             (err) => {
               err.message.should.match(/Unknown Sass implementation "asdfj"\./);
               done();
@@ -533,6 +552,7 @@ implementations.forEach((implementation) => {
             {
               implementation: merge(nodeSass, { info: 'node-sass\t1' }),
             },
+            {},
             (err) => {
               err.message.should.match(/Invalid Sass version "1"\./);
               done();
@@ -548,6 +568,7 @@ implementations.forEach((implementation) => {
             {
               implementation: merge(nodeSass, { info: 'node-sass\t3.0.0' }),
             },
+            {},
             (err) => {
               err.message.should.match(
                 /Node Sass version 3\.0\.0 is incompatible with \^4\.0\.0\./
@@ -565,6 +586,7 @@ implementations.forEach((implementation) => {
             {
               implementation: merge(nodeSass, { info: 'dart-sass\t1.2.0' }),
             },
+            {},
             (err) => {
               err.message.should.match(
                 /Dart Sass version 1\.2\.0 is incompatible with \^1\.3\.0\./
@@ -582,6 +604,7 @@ implementations.forEach((implementation) => {
             {
               implementation: merge(nodeSass, { info: 'strange-sass\t1.0.0' }),
             },
+            {},
             (err) => {
               err.message.should.match(
                 /Unknown Sass implementation "strange-sass"\./
@@ -629,6 +652,7 @@ implementations.forEach((implementation) => {
               entry: pathToFile,
             },
             { implementation: null },
+            {},
             (err) => {
               // eslint-disable-next-line no-underscore-dangle
               module._resolveFilename = originalResolve;

test/sass/import-custom-sass-field.sass

@@ -0,0 +1 @@
+@import "~sass-custom-sass-field"

test/sass/import-main-field.sass

@@ -0,0 +1 @@
+@import "~sass-main-field"

test/sass/import-style-field.sass

@@ -0,0 +1 @@
+@import "~sass-style-field"

test/scss/import-custom-sass-field.scss

@@ -0,0 +1 @@
+@import "~scss-custom-sass-field";

test/scss/import-main-field.scss

@@ -0,0 +1 @@
+@import "~scss-main-field";

test/scss/import-style-field.scss

@@ -0,0 +1 @@
+@import "~scss-style-field";

test/tools/createSpec.js

@@ -48,6 +48,36 @@ function createSpec(ext) {
       'style.scss'
     )
   );
+  const pathToScssStyleField = path.relative(
+    basePath,
+    path.resolve(
+      testFolder,
+      'node_modules',
+      'scss-style-field',
+      'nested',
+      'style.scss'
+    )
+  );
+  const pathToScssCustomSassField = path.relative(
+    basePath,
+    path.resolve(
+      testFolder,
+      'node_modules',
+      'scss-custom-sass-field',
+      'nested',
+      'style.scss'
+    )
+  );
+  const pathToScssMainField = path.relative(
+    basePath,
+    path.resolve(
+      testFolder,
+      'node_modules',
+      'scss-main-field',
+      'nested',
+      'style.scss'
+    )
+  );
   const pathToSASSSassField = path.relative(
     basePath,
     path.resolve(
@@ -58,6 +88,36 @@ function createSpec(ext) {
       'style.sass'
     )
   );
+  const pathToSASSStyleField = path.relative(
+    basePath,
+    path.resolve(
+      testFolder,
+      'node_modules',
+      'sass-style-field',
+      'nested',
+      'style.sass'
+    )
+  );
+  const pathToSASSCustomSassField = path.relative(
+    basePath,
+    path.resolve(
+      testFolder,
+      'node_modules',
+      'sass-custom-sass-field',
+      'nested',
+      'style.sass'
+    )
+  );
+  const pathToSASSMainField = path.relative(
+    basePath,
+    path.resolve(
+      testFolder,
+      'node_modules',
+      'sass-main-field',
+      'nested',
+      'style.sass'
+    )
+  );
 
   fs.readdirSync(path.join(testFolder, ext))
     .filter(
@@ -78,7 +138,13 @@ function createSpec(ext) {
             // eslint-disable-next-line no-param-reassign
             url = url
               .replace(/^~scss-sass-field/, pathToScssSassField)
+              .replace(/^~scss-style-field/, pathToScssStyleField)
+              .replace(/^~scss-custom-sass-field/, pathToScssCustomSassField)
+              .replace(/^~scss-main-field/, pathToScssMainField)
               .replace(/^~sass-sass-field/, pathToSASSSassField)
+              .replace(/^~sass-style-field/, pathToSASSStyleField)
+              .replace(/^~sass-custom-sass-field/, pathToSASSCustomSassField)
+              .replace(/^~sass-main-field/, pathToSASSMainField)
               .replace(/^~bootstrap-sass/, pathToBootstrap)
               .replace(/^~@org\/pkg/, pathToScopedNpmPkg)
               .replace(/^~module/, pathToModule)