Adding support to extract messages from intl.formatMessage calls

cli.js

@@ -17,6 +17,7 @@ const cli = meow(
   --flat                json [default: true] | yaml [default: false]
   --delimiter           json | yaml [default: .]
   --module-name         module source name from where components are imported
+  --extractFromFormatMessageCall      If set to 'true', Command will extract the messages and IDs from 'intl.formatMessage' calls
 
   Example
   $ extract-messages --locales=ja,en --output app/translations 'app/**/*.js'
@@ -50,6 +51,9 @@ const cli = meow(
       },
       'module-name': {
         type: 'string'
+      },
+      extractFromFormatMessageCall: {
+        type: 'boolean'
       }
     }
   }

index.js

@@ -80,13 +80,13 @@ module.exports = async (locales, pattern, buildDir, opts) => {
 
   const ext = isJson(opts.format) ? 'json' : 'yml'
 
-  const { defaultLocale, moduleName } = opts
+  const { defaultLocale, moduleName, extractFromFormatMessageCall } = opts
 
   const delimiter = opts.delimiter ? opts.delimiter : '.'
 
   const oldLocaleMaps = loadLocaleFiles(locales, buildDir, ext, delimiter)
 
-  const extractorOptions = { defaultLocale }
+  const extractorOptions = { defaultLocale, extractFromFormatMessageCall }
 
   if (moduleName) {
     extractorOptions.moduleSourceName = moduleName

readme.md

@@ -101,6 +101,7 @@ $ extract-messages --help
   --default-locale   default locale [default: en]
   --delimiter        json | yaml [default: .]
   --module-name      module source name from where components are imported [default: react-intl]
+  --extractFromFormatMessageCall      If set to `true`, Command will extract the messages and IDs from `intl.formatMessage` calls
 
   Example
   $ extract-messages --locales=ja,en --output app/translations 'app/**/*.js'
@@ -178,6 +179,21 @@ Default: `react-intl`
 
 Set from where _defineMessages_, `<FormatterMessage />` and `<FormattedHTML />` are imported.
 
+##### extractFromFormatMessageCall
+
+Type: `boolean`<br>
+Default: `react-intl`
+
+If the value is `true`, Extractor will extract the i18n message and ID from `intl.formatMessage` calls as well.
+i:e
+
+```
+intl.formatMessage({
+                id: 'Supported.file.types',
+                defaultMessage: 'Supported file types',
+            })
+```
+
 ## Contributors
 
 Thanks goes to these wonderful people ([emoji key](https://github.com/kentcdodds/all-contributors#emoji-key)):