Add additional argument for generating msgstr in order to create *.po files

README.md

@@ -58,11 +58,12 @@ $ rip json2pot '_translations/src/**/*.json' \
     -o ./mcs-public.pot
 ```
 
-| **Arguments**      |  **Description**                                                       |
-| ------------------ | ---------------------------------------------------------------------- |
-| `srcPatterns`      |  The pattern of *.json* files extracted from *babel-plugin-react-intl* |
-| `output (-o)`      |  The output pathname of *.pot* file to be translated                   |
-| `message-key (-k)` |  [Optional] Translation message key (default key is `defaultMessage`)  |
+| **Arguments**        |  **Description**                                                       |
+| -------------------- | ---------------------------------------------------------------------- |
+| `srcPatterns`        |  The pattern of *.json* files extracted from *babel-plugin-react-intl* |
+| `output (-o)`        |  The output pathname of *.pot* file to be translated                   |
+| `message-key (-k)`   |  [Optional] Translation message ID key (default key is `defaultMessage`)  |
+| `message-value (-v)` |  [Optional] Translation message value key (default is to leave `msgstr` empty)  |
 
 ### po2json
 
@@ -115,6 +116,17 @@ $ rip po2json './node_modules/mcs-translation/po/mcs-public*.po' \`
     -k 'id'
 ```
 
+### How to generate `*.po` instead of `*.pot`
+
+Set the `message-value (-v)` to `'defaultMessage'` of message object from *babel-plugin-react-intl*. The default behaviour omits values to generate a template file instead of a specific locale.
+
+```
+$ rip json2pot '_translations/src/**/*.json' \
+    -o './mcs-public.po' \
+    -k 'id' \
+    -v 'defaultMessage'
+```
+
 ## Test
 
 ```

src/cli.js

@@ -5,7 +5,8 @@ import program from 'commander';
 program
   .command('json2pot <srcPatterns>')
   .option('-o, --output <path>', 'The output pathname of `.pot` file to be translated')
-  .option('-k, --message-key [key]', 'Translation message key (default key is `defaultMessage`)')
+  .option('-k, --message-key [key]', 'Translation message ID key (default key is `defaultMessage`)')
+  .option('-v, --message-value [key]', 'Translation message value key (default is to omit this)')
   .action(require('./extractAndWritePOTFromMessagesSync'));
 
 program
@@ -15,7 +16,7 @@ program
     'The pattern of *json* files extracted from *babel-plugin-react-intl*',
   )
   .option('-o, --output <path>', 'The output pathname of a file / directory')
-  .option('-k, --message-key [key]', 'Translation message key (default key is `defaultMessage`)')
+  .option('-k, --message-key [key]', 'Translation message ID key (default key is `defaultMessage`)')
   .action(require('./filterPOAndWriteTranslateSync'));
 
 program.parse(process.argv);

src/extractAndWritePOTFromMessagesSync.js

@@ -12,11 +12,11 @@ const customKeyMapper = (message, messageKey, filename) => ({
 const customKeyMapperFactory = (messageKey = 'defaultMessage') =>
   (message, filename) => customKeyMapper(message, messageKey, filename);
 
-function extractAndWritePOTFromMessagesSync(srcPatterns, { messageKey, output }) {
+function extractAndWritePOTFromMessagesSync(srcPatterns, { messageKey, messageValue, output }) {
   const mapper = messageKey ? customKeyMapperFactory(messageKey) : undefined;
 
   const result = flowRight(
-    potFormater,                // 2. return formated string
+    potFormater(messageValue),  // 2. return formated string
     readAllMessageAsObjectSync, // 1. return messages object
   )(srcPatterns, mapper);
 

src/index.js

@@ -7,7 +7,8 @@ import readAllPOAsObjectSync from './readAllPOAsObjectSync';
 export default {
   extractAndWritePOTFromMessagesSync,
   filterPOAndWriteTranslateSync,
-  potFormater,
+  potFormater: potFormater(null),
+  potFormaterFactory: potFormater,
   readAllMessageAsObjectSync,
   readAllPOAsObjectSync,
 };

src/potFormater.js

@@ -22,10 +22,10 @@ const potCommentsFormater = (messageList) =>
  * @author Michael Hsu
  */
 
-const potFormater = (messageObject) =>
+const potFormater = (messageValue) => (messageObject) =>
   Object.keys(messageObject) // return array of id
     .sort()
-    .map(id => `${potCommentsFormater(messageObject[id])}msgid "${id}"\nmsgstr ""\n`)
+    .map(id => `${potCommentsFormater(messageObject[id])}msgid "${id}"\nmsgstr "${messageValue ? messageObject[id][0][messageValue] : ''}"\n`)
     .join('\n');
 
 export default potFormater;

test/potFormater.test.js

@@ -2,12 +2,12 @@ import test from 'ava';
 import potFormater from '../src/potFormater';
 
 test('should return a function', t => {
-  t.is(typeof potFormater, 'function');
+  t.is(typeof potFormater(null), 'function');
 });
 
 test('should return pot formatted string', t => {
   t.is(
-    potFormater({
+    potFormater(null)({
       'Go to MCS website': [
         {
           id: 'App.errorButton',