feat(loaders): po files (GNU gettext) (#496)

Author: mathio

.changeset/silly-queens-tap.md

@@ -0,0 +1,6 @@
+---
+"@lingo.dev/_spec": patch
+"lingo.dev": patch
+---
+
+po files

packages/cli/src/cli/loaders/index.spec.ts

@@ -1636,6 +1636,42 @@ return array(
 
       expect(fs.writeFile).toHaveBeenCalledWith("i18n/es.php", expectedOutput, { encoding: "utf-8", flag: "w" });
     });
+
+    describe("po bucket loader", () => {
+      it("should load po file", async () => {
+        setupFileMocks();
+
+        const input = `msgid "Hello"\nmsgstr "Hello"`;
+        const expectedOutput = { "Hello/singular": "Hello" };
+
+        mockFileOperations(input);
+
+        const jsonLoader = createBucketLoader("po", "i18n/[locale].po");
+        jsonLoader.setDefaultLocale("en");
+        const data = await jsonLoader.pull("en");
+
+        expect(data).toEqual(expectedOutput);
+      });
+
+      it("should save po file", async () => {
+        setupFileMocks();
+
+        const input = `msgid "Hello"\nmsgstr "Hello"`;
+        const expectedOutput = `msgid "Hello"\nmsgstr "Hola"`;
+
+        mockFileOperations(input);
+
+        const jsonLoader = createBucketLoader("po", "i18n/[locale].po");
+        jsonLoader.setDefaultLocale("en");
+        await jsonLoader.pull("en");
+
+        await jsonLoader.push("es", {
+          "Hello/singular": "Hola",
+        });
+
+        expect(fs.writeFile).toHaveBeenCalledWith("i18n/es.po", expectedOutput, { encoding: "utf-8", flag: "w" });
+      });
+    });
   });
 });
 

packages/cli/src/cli/utils/find-locale-paths.ts

@@ -18,6 +18,8 @@ export default function findLocaleFiles(bucket: string) {
       return findLocaleFilesWithExtension(".md");
     case "php":
       return findLocaleFilesWithExtension(".php");
+    case "po":
+      return findLocaleFilesWithExtension(".po");
     case "xcode-xcstrings":
       return findLocaleFilesForFilename("Localizable.xcstrings");
     case "xcode-strings":

packages/spec/src/formats.ts

@@ -21,6 +21,7 @@ export const bucketTypes = [
   "compiler",
   "vtt",
   "php",
+  "po",
 ] as const;
 
 export const bucketTypeSchema = Z.enum(bucketTypes);