feat: add autoResolveMultiImports option

README.md

@@ -199,6 +199,7 @@ Configure the options for the plugin within your `.babelrc` as follows:
 |`handleMissingStyleName`|`"throw"`, `"warn"`, `"ignore"`|Determines what should be done for undefined CSS modules (using a `styleName` for which there is no CSS module defined).  Setting this option to `"ignore"` is equivalent to setting `errorWhenNotFound: false` in [react-css-modules](https://github.com/gajus/react-css-modules#errorwhennotfound). |`"throw"`|
 |`attributeNames`|`?AttributeNameMapType`|Refer to [Custom Attribute Mapping](#custom-attribute-mapping)|`{"styleName": "className"}`|
 |`skip`|`boolean`|Whether to apply plugin if no matching `attributeNames` found in the file|`false`|
+|`autoResolveMultipleImports`|`boolean`|Allow multiple anonymous imports if `styleName` is only in one of them.|`false`|
 
 Missing a configuration? [Raise an issue](https://github.com/gajus/babel-plugin-react-css-modules/issues/new?title=New%20configuration:).
 

src/createObjectExpression.js

@@ -28,6 +28,9 @@ const createObjectExpression = (t: BabelTypes, object: InputObjectType): ObjectE
       newValue = createObjectExpression(t, value);
     } else if (typeof value === 'boolean') {
       newValue = t.booleanLiteral(value);
+    } else if (typeof value === 'undefined') {
+      // eslint-disable-next-line no-continue
+      continue;
     } else {
       throw new TypeError('Unexpected type: ' + typeof value);
     }

src/getClassName.js

@@ -3,18 +3,26 @@
 import type {
   StyleModuleMapType,
   StyleModuleImportMapType,
-  HandleMissingStyleNameOptionType
+  HandleMissingStyleNameOptionType,
+  GetClassNameOptionsType
 } from './types';
 import optionsDefaults from './schemas/optionsDefaults';
 
-type OptionsType = {|
-  handleMissingStyleName: HandleMissingStyleNameOptionType
-|};
-
 const isNamespacedStyleName = (styleName: string): boolean => {
   return styleName.indexOf('.') !== -1;
 };
 
+const handleError = (message: string, handleMissingStyleName: HandleMissingStyleNameOptionType): null => {
+  if (handleMissingStyleName === 'throw') {
+    throw new Error(message);
+  } else if (handleMissingStyleName === 'warn') {
+    // eslint-disable-next-line no-console
+    console.warn(message);
+  }
+
+  return null;
+};
+
 const getClassNameForNamespacedStyleName = (
   styleName: string,
   styleModuleImportMap: StyleModuleImportMapType,
@@ -30,47 +38,60 @@ const getClassNameForNamespacedStyleName = (
     optionsDefaults.handleMissingStyleName;
 
   if (!moduleName) {
-    if (handleMissingStyleName === 'throw') {
-      throw new Error('Invalid style name: ' + styleName);
-    } else if (handleMissingStyleName === 'warn') {
-      // eslint-disable-next-line no-console
-      console.warn('Invalid style name: ' + styleName);
-    } else {
-      return null;
-    }
+    return handleError('Invalid style name: ' + styleName, handleMissingStyleName);
   }
 
   if (!styleModuleImportMap[importName]) {
-    if (handleMissingStyleName === 'throw') {
-      throw new Error('CSS module import does not exist: ' + importName);
-    } else if (handleMissingStyleName === 'warn') {
-      // eslint-disable-next-line no-console
-      console.warn('CSS module import does not exist: ' + importName);
-    } else {
-      return null;
-    }
+    return handleError('CSS module import does not exist: ' + importName, handleMissingStyleName);
   }
 
   if (!styleModuleImportMap[importName][moduleName]) {
-    if (handleMissingStyleName === 'throw') {
-      throw new Error('CSS module does not exist: ' + moduleName);
-    } else if (handleMissingStyleName === 'warn') {
-      // eslint-disable-next-line no-console
-      console.warn('CSS module does not exist: ' + moduleName);
-    } else {
-      return null;
-    }
+    return handleError('CSS module does not exist: ' + moduleName, handleMissingStyleName);
   }
 
   return styleModuleImportMap[importName][moduleName];
 };
 
-export default (styleNameValue: string, styleModuleImportMap: StyleModuleImportMapType, options?: OptionsType): string => {
+const getClassNameFromMultipleImports = (
+  styleName: string,
+  styleModuleImportMap: StyleModuleImportMapType,
+  handleMissingStyleNameOption?: HandleMissingStyleNameOptionType
+): ?string => {
+  const handleMissingStyleName = handleMissingStyleNameOption ||
+    optionsDefaults.handleMissingStyleName;
+
+  const importKeysWithMatches = Object.keys(styleModuleImportMap)
+    .map((importKey) => {
+      return styleModuleImportMap[importKey][styleName] && importKey;
+    })
+    .filter((importKey) => {
+      return importKey;
+    });
+
+  if (importKeysWithMatches.length > 1) {
+    throw new Error('Cannot resolve styleName "' + styleName + '" because it is present in multiple imports:' +
+      '\n\n\t' + importKeysWithMatches.join('\n\t') +
+      '\n\nYou can resolve this by using a named import, e.g:' +
+      '\n\n\timport foo from "' + importKeysWithMatches[0] + '";' +
+      '\n\t<div styleName="foo.' + styleName + '" />' +
+      '\n\n');
+  }
+
+  if (importKeysWithMatches.length === 0) {
+    return handleError('Could not resolve the styleName \'' + styleName + '\'.', handleMissingStyleName);
+  }
+
+  return styleModuleImportMap[importKeysWithMatches[0]][styleName];
+};
+
+export default (styleNameValue: string, styleModuleImportMap: StyleModuleImportMapType, options?: GetClassNameOptionsType): string => {
   const styleModuleImportMapKeys = Object.keys(styleModuleImportMap);
 
   const handleMissingStyleName = options && options.handleMissingStyleName ||
     optionsDefaults.handleMissingStyleName;
 
+  const autoResolveMultipleImports = options && options.autoResolveMultipleImports;
+
   if (!styleNameValue) {
     return '';
   }
@@ -91,20 +112,18 @@ export default (styleNameValue: string, styleModuleImportMap: StyleModuleImportM
       }
 
       if (styleModuleImportMapKeys.length > 1) {
-        throw new Error('Cannot use anonymous style name \'' + styleName +
-          '\' with more than one stylesheet import.');
+        if (!autoResolveMultipleImports) {
+          throw new Error('Cannot use anonymous style name \'' + styleName +
+            '\' with more than one stylesheet import without setting \'autoResolveMultipleImports\' to true.');
+        }
+
+        return getClassNameFromMultipleImports(styleName, styleModuleImportMap, handleMissingStyleName);
       }
 
       const styleModuleMap: StyleModuleMapType = styleModuleImportMap[styleModuleImportMapKeys[0]];
 
       if (!styleModuleMap[styleName]) {
-        if (handleMissingStyleName === 'throw') {
-          throw new Error('Could not resolve the styleName \'' + styleName + '\'.');
-        }
-        if (handleMissingStyleName === 'warn') {
-          // eslint-disable-next-line no-console
-          console.warn('Could not resolve the styleName \'' + styleName + '\'.');
-        }
+        return handleError('Could not resolve the styleName \'' + styleName + '\'.', handleMissingStyleName);
       }
 
       return styleModuleMap[styleName];

src/index.js

@@ -212,19 +212,23 @@ export default ({
         }
 
         const handleMissingStyleName = stats.opts && stats.opts.handleMissingStyleName || optionsDefaults.handleMissingStyleName;
+        const autoResolveMultipleImports = stats.opts && stats.opts.autoResolveMultipleImports || optionsDefaults.autoResolveMultipleImports;
 
         for (const attribute of attributes) {
           const destinationName = attributeNames[attribute.name.name];
 
+          const options = {
+            autoResolveMultipleImports,
+            handleMissingStyleName
+          };
+
           if (t.isStringLiteral(attribute.value)) {
             resolveStringLiteral(
               path,
               filenameMap[filename].styleModuleImportMap,
               attribute,
               destinationName,
-              {
-                handleMissingStyleName
-              }
+              options
             );
           } else if (t.isJSXExpressionContainer(attribute.value)) {
             if (!filenameMap[filename].importedHelperIndentifier) {
@@ -237,9 +241,7 @@ export default ({
               destinationName,
               filenameMap[filename].importedHelperIndentifier,
               filenameMap[filename].styleModuleImportMapIdentifier,
-              {
-                handleMissingStyleName
-              }
+              options
             );
           }
         }

src/replaceJsxExpressionContainer.js

@@ -11,16 +11,12 @@ import BabelTypes, {
   jSXIdentifier
 } from '@babel/types';
 import type {
-  HandleMissingStyleNameOptionType
+  GetClassNameOptionsType
 } from './types';
 import conditionalClassMerge from './conditionalClassMerge';
 import createObjectExpression from './createObjectExpression';
 import optionsDefaults from './schemas/optionsDefaults';
 
-type OptionsType = {|
-  handleMissingStyleName: HandleMissingStyleNameOptionType
-|};
-
 export default (
   t: BabelTypes,
   // eslint-disable-next-line flowtype/no-weak-types
@@ -29,7 +25,7 @@ export default (
   destinationName: string,
   importedHelperIndentifier: Identifier,
   styleModuleImportMapIdentifier: Identifier,
-  options: OptionsType
+  options: GetClassNameOptionsType
 ): void => {
   const expressionContainerValue = sourceAttribute.value;
   const destinationAttribute = path.node.openingElement.attributes
@@ -50,7 +46,8 @@ export default (
 
   // Only provide options argument if the options are something other than default
   // This helps save a few bits in the generated user code
-  if (options.handleMissingStyleName !== optionsDefaults.handleMissingStyleName) {
+  if (options.handleMissingStyleName !== optionsDefaults.handleMissingStyleName ||
+    options.autoResolveMultipleImports !== optionsDefaults.autoResolveMultipleImports) {
     args.push(createObjectExpression(t, options));
   }
 

src/resolveStringLiteral.js

@@ -10,13 +10,9 @@ import conditionalClassMerge from './conditionalClassMerge';
 import getClassName from './getClassName';
 import type {
   StyleModuleImportMapType,
-  HandleMissingStyleNameOptionType
+  GetClassNameOptionsType
 } from './types';
 
-type OptionsType = {|
-  handleMissingStyleName: HandleMissingStyleNameOptionType
-|};
-
 /**
  * Updates the className value of a JSX element using a provided styleName attribute.
  */
@@ -25,7 +21,7 @@ export default (
   styleModuleImportMap: StyleModuleImportMapType,
   sourceAttribute: JSXAttribute,
   destinationName: string,
-  options: OptionsType
+  options: GetClassNameOptionsType
 ): void => {
   const resolvedStyleName = getClassName(sourceAttribute.value.value, styleModuleImportMap, options);
 

src/schemas/optionsSchema.json

@@ -72,6 +72,9 @@
     },
     "skip": {
       "type": "boolean"
+    },
+    "autoResolveMultipleImports": {
+      "type": "boolean"
     }
   },
   "type": "object"

src/types.js

@@ -13,3 +13,8 @@ export type GenerateScopedNameType = (localName: string, resourcePath: string) =
 export type GenerateScopedNameConfigurationType = GenerateScopedNameType | string;
 
 export type HandleMissingStyleNameOptionType = 'throw' | 'warn' | 'ignore';
+
+export type GetClassNameOptionsType = {|
+  handleMissingStyleName: HandleMissingStyleNameOptionType,
+  autoResolveMultipleImports: boolean
+|};

test/fixtures/react-css-modules/throws if autoResolveMultipleImport with duplicates/bar.css

@@ -0,0 +1,3 @@
+.a {}
+
+.b {}

test/fixtures/react-css-modules/throws if autoResolveMultipleImport with duplicates/foo.css

@@ -0,0 +1 @@
+.b {}

test/fixtures/react-css-modules/throws if autoResolveMultipleImport with duplicates/input.js

@@ -0,0 +1,5 @@
+import './foo.css';
+import './bar.css';
+
+<div styleName="a"></div>;
+<div styleName="b"></div>;

test/fixtures/react-css-modules/throws if autoResolveMultipleImport with duplicates/options.json

@@ -0,0 +1,12 @@
+{
+  "plugins": [
+    [
+      "../../../../src",
+      {
+        "generateScopedName": "[name]__[local]",
+        "autoResolveMultipleImports": true
+      }
+    ]
+  ],
+  "throws": "Cannot resolve styleName \"b\" because it is present in multiple imports:\n\n\t./foo.css\n\t./bar.css\n\nYou can resolve this by using a named import, e.g:\n\n\timport foo from \"./foo.css\";\n\t<div styleName=\"foo.b\" />\n\n"
+}

test/fixtures/react-css-modules/throws if autoResolveMultipleImport with no match/bar.css

@@ -0,0 +1,3 @@
+.a {}
+
+.b {}

test/fixtures/react-css-modules/throws if autoResolveMultipleImport with no match/foo.css

@@ -0,0 +1 @@
+.b {}

test/fixtures/react-css-modules/throws if autoResolveMultipleImport with no match/input.js

@@ -0,0 +1,4 @@
+import './foo.css';
+import './bar.css';
+
+<div styleName="c"></div>;

test/fixtures/react-css-modules/throws if autoResolveMultipleImport with no match/options.json

@@ -0,0 +1,12 @@
+{
+  "plugins": [
+    [
+      "../../../../src",
+      {
+        "generateScopedName": "[name]__[local]",
+        "autoResolveMultipleImports": true
+      }
+    ]
+  ],
+  "throws": "Could not resolve the styleName 'c'."
+}

test/fixtures/react-css-modules/throws if unset autoResolveMultipleImport with multiple anonymous imports/bar.css

@@ -0,0 +1,3 @@
+.a {}
+
+.b {}

test/fixtures/react-css-modules/throws if unset autoResolveMultipleImport with multiple anonymous imports/foo.css

@@ -0,0 +1 @@
+.b {}

test/fixtures/react-css-modules/throws if unset autoResolveMultipleImport with multiple anonymous imports/input.js

@@ -0,0 +1,4 @@
+import './foo.css';
+import './bar.css';
+
+<div styleName="a"></div>;

test/fixtures/react-css-modules/throws if unset autoResolveMultipleImport with multiple anonymous imports/options.json

@@ -0,0 +1,11 @@
+{
+  "plugins": [
+    [
+      "../../../../src",
+      {
+        "generateScopedName": "[name]__[local]"
+      }
+    ]
+  ],
+  "throws": "Cannot use anonymous style name 'a' with more than one stylesheet import without setting 'autoResolveMultipleImports' to true."
+}

test/fixtures/react-css-modules/uses autoResolveMultipleImport no duplicates/bar.css

@@ -0,0 +1 @@
+.a {}

test/fixtures/react-css-modules/uses autoResolveMultipleImport no duplicates/foo.css

@@ -0,0 +1 @@
+.b {}

test/fixtures/react-css-modules/uses autoResolveMultipleImport no duplicates/input.js

@@ -0,0 +1,5 @@
+import './foo.css';
+import './bar.css';
+
+<div styleName="a"></div>;
+<div styleName="b"></div>;

test/fixtures/react-css-modules/uses autoResolveMultipleImport no duplicates/options.json

@@ -0,0 +1,11 @@
+{
+  "plugins": [
+    [
+      "../../../../src",
+      {
+        "generateScopedName": "[name]__[local]",
+        "autoResolveMultipleImports": true
+      }
+    ]
+  ]
+}

test/fixtures/react-css-modules/uses autoResolveMultipleImport no duplicates/output.js

@@ -0,0 +1,8 @@
+"use strict";
+
+require("./foo.css");
+
+require("./bar.css");
+
+<div className="bar__a"></div>;
+<div className="foo__b"></div>;

test/fixtures/react-css-modules/uses autoResolveMultipleImport on runtime/bar.css

@@ -0,0 +1 @@
+.a {}

test/fixtures/react-css-modules/uses autoResolveMultipleImport on runtime/foo.css

@@ -0,0 +1 @@
+.b {}

test/fixtures/react-css-modules/uses autoResolveMultipleImport on runtime/input.js

@@ -0,0 +1,8 @@
+import './foo.css';
+import './bar.css';
+
+const styleNameA = 'a';
+const styleNameB = 'b';
+
+<div styleName={styleNameA}></div>;
+<div styleName={styleNameB}></div>;