Correctly add pure annotation

Author: Demivan

__tests__/frameworks/vite/external.spec.ts

@@ -178,7 +178,7 @@ describe('Vite external', () => {
     expect(code).toMatchInlineSnapshot(`
       "=== /fixtures/ftl/en/importer.js.ftl ===
 
-      export default /*#__PURE__*/ {"body":[{"id":"key","value":"Translations for js file","attributes":{}}]}
+      export default {"body":[{"id":"key","value":"Translations for js file","attributes":{}}]}
       "
     `)
   })

src/plugins/external-plugin.ts

@@ -132,9 +132,9 @@ export const unplugin = createUnplugin((options: ExternalPluginOptions) => {
       }
 
       if (isFtl(id)) {
-        const injectFtl = getInjectFtl(resolvedOptions)
+        const injectFtl = getInjectFtl(resolvedOptions, true)
         const result = injectFtl`
-export default /*#__PURE__*/ ${source}
+export default ${source}
 `
 
         if (result.error)

src/plugins/ftl/inject.ts

@@ -8,13 +8,15 @@ function normalize(str: string) {
   return str.replace(/\r\n/g, '\n').trim()
 }
 
-export function getInjectFtl(options: { checkSyntax: boolean, parseFtl: boolean }): InjectFtlFn {
+export function getInjectFtl(options: { checkSyntax: boolean, parseFtl: boolean }, addPureAnotation = false): InjectFtlFn {
   return (template, locale, source) => {
     if (source == null) {
       source = locale
       locale = undefined
     }
 
+    const pureAnotation = addPureAnotation ? '/*#__PURE__*/ ' : ''
+
     if (source == null)
       throw new Error('Missing source')
 
@@ -39,7 +41,7 @@ export function getInjectFtl(options: { checkSyntax: boolean, parseFtl: boolean
       magic.overwrite(0, source.length, JSON.stringify(resource))
     }
     else {
-      magic.overwrite(0, source.length, `new FluentResource(${JSON.stringify(normalize(source))})`)
+      magic.overwrite(0, source.length, `${pureAnotation}new FluentResource(${JSON.stringify(normalize(source))})`)
     }
 
     if (template.length === 2) {