Merge pull request #64 from lensbart/patch-1

Fixes #63

Author: akameco

readme.md

@@ -201,6 +201,7 @@ Thanks goes to these wonderful people ([emoji key](https://github.com/kentcdodds
     <td align="center"><a href="http://ddem.us/"><img src="https://avatars1.githubusercontent.com/u/290457?v=4" width="100px;" alt="Gregor MacLennan"/><br /><sub><b>Gregor MacLennan</b></sub></a><br /><a href="https://github.com/akameco/extract-react-intl-messages/commits?author=gmaclennan" title="Code">💻</a></td>
     <td align="center"><a href="https://github.com/zarv1k"><img src="https://avatars1.githubusercontent.com/u/6296643?v=4" width="100px;" alt="Dmitry Zarva"/><br /><sub><b>Dmitry Zarva</b></sub></a><br /><a href="https://github.com/akameco/extract-react-intl-messages/commits?author=zarv1k" title="Code">💻</a></td>
     <td align="center"><a href="https://github.com/panpanc"><img src="https://avatars2.githubusercontent.com/u/29132669?v=4" width="100px;" alt="Michael Pan"/><br /><sub><b>Michael Pan</b></sub></a><br /><a href="#example-panpanc" title="Examples">💡</a></td>
+    <td align="center"><a href="https://github.com/lensbart"><img src="https://avatars2.githubusercontent.com/u/20876627?s=460&v=4" width="100px;" alt="Bart Lens"/><br /><sub><b>Bart Lens</b></sub></a><br /><a href="https://github.com/akameco/extract-react-intl-messages/commits?author=lensbart" title="Code">💻</a></td>
   </tr>
 </table>
 

src/extract-react-intl/index.ts

@@ -101,19 +101,26 @@ export default async (
   const presets = babelrc.presets || []
   const plugins = babelrc.plugins || []
 
-  presets.unshift({
-    plugins: [
-      [
-        babelPluginReactIntl,
-        Object.entries(pluginOptions).reduce((acc, [key, value]) => {
-          if (babelPluginReactIntlOptions.includes(key)) {
-            return { ...acc, [key]: value }
-          }
-          return acc
-        }, {})
+  if (
+    !plugins.find(plugin =>
+      (Array.isArray(plugin) ? plugin[0] : plugin) === 'react-intl'
+    )
+  ) {
+    // Append a the `react-intl` babel plugin only when it isn’t already included in the babel config
+    presets.unshift({
+      plugins: [
+        [
+          babelPluginReactIntl,
+          Object.entries(pluginOptions).reduce((acc, [key, value]) => {
+            if (babelPluginReactIntlOptions.includes(key)) {
+              return { ...acc, [key]: value }
+            }
+            return acc
+          }, {})
+        ]
       ]
-    ]
-  })
+    })
+  }
 
   const extractFromFile = async (file: string) => {
     const babelOpts = {