Support Typescript

README.md

@@ -93,6 +93,7 @@ const keys = extractFromFiles([
 
 - `marker`: The name of the internationalized string marker function. Defaults to `i18n`.
 - `keyLoc`: An integer indicating the position of the key in the arguments. Defaults to `0`. Negative numbers, e.g., `-1`, indicate a position relative to the end of the argument list.
+- `useTypeScript`: Defaults to `false`.
 
 ### findMissing(locale, keysUsed)
 

src/extractFromCode.js

@@ -40,15 +40,14 @@ const commentRegExp = /i18n-extract (.+)/;
 const commentIgnoreRegExp = /i18n-extract-disable-line/;
 
 export default function extractFromCode(code, options = {}) {
-  const { marker = 'i18n', keyLoc = 0 } = options;
+  const { marker = 'i18n', keyLoc = 0, useTypeScript = false } = options;
 
   const ast = parse(code, {
     sourceType: 'module',
 
     // Enable all the plugins
     plugins: [
       'jsx',
-      'flow',
       'asyncFunctions',
       'classConstructorCall',
       'doExpressions',
@@ -62,7 +61,7 @@ export default function extractFromCode(code, options = {}) {
       'functionBind',
       'functionSent',
       'dynamicImport',
-    ],
+    ].concat([useTypeScript ? 'typescript' : 'flow']),
   });
 
   const keys = [];

src/extractFromFiles.spec.js

@@ -168,4 +168,38 @@ describe('#extractFromFiles()', () => {
       'Should work with an array as first parameter',
     );
   });
+
+  it('should work when scanning typescript files', () => {
+    const keys = extractFromFiles(
+      ['src/extractFromFilesFixture/*.tsx', 'src/extractFromFilesFixture/*.ts'],
+      { useTypeScript: true },
+    );
+
+    assert.deepEqual(
+      [
+        {
+          key: 'key3',
+          loc: { start: { line: 5, column: 0 }, end: { line: 5, column: 12 } },
+          file: 'src/extractFromFilesFixture/LoginView.tsx',
+        },
+        {
+          key: 'key1',
+          loc: { start: { line: 6, column: 0 }, end: { line: 6, column: 12 } },
+          file: 'src/extractFromFilesFixture/LoginView.tsx',
+        },
+        {
+          key: 'key3',
+          loc: { start: { line: 7, column: 0 }, end: { line: 7, column: 12 } },
+          file: 'src/extractFromFilesFixture/LogoutView.ts',
+        },
+        {
+          key: 'key1',
+          loc: { start: { line: 8, column: 0 }, end: { line: 8, column: 12 } },
+          file: 'src/extractFromFilesFixture/LogoutView.ts',
+        },
+      ],
+      keys,
+      'should work when scanning typescript files',
+    );
+  });
 });

src/extractFromFilesFixture/LoginView.tsx

@@ -0,0 +1,6 @@
+/* eslint-disable */
+
+import i18n from 'i18n';
+
+i18n('key3');
+i18n('key1');

src/extractFromFilesFixture/LogoutView.ts

@@ -0,0 +1,8 @@
+/* eslint-disable */
+
+import i18n from 'i18n';
+
+type i18n = (key: string) => string;
+
+i18n('key3');
+i18n('key1');