Export to PO with plural

[Erwane]

Describe the bug
When exporting to .PO with plural keys, the po file is invalid.

To Reproduce
Flat JSon

{
  "user.notification.count": "{value, plural, one {Notification} other {Notifications}}"
}

Exported PO

msgid ""
msgstr ""
"Language: fr-FR\n"
"MIME-Version: 1.0\n"
"Content-Type: text/plain; charset=UTF-8\n"
"Content-Transfer-Encoding: 8bit\n"
"Plural-Forms: nplurals = 2; plural = (n > 1)\n"
"X-Generator: Tolgee\n"

msgid "user.notification.count"
msgstr[0] "Notification"
msgstr[1] "Notifications"

PoEdit complain about invalid file with message: Broken PO file: plural form msgstr used without msgid_plural

Expected behavior

msgid "user.notification.count"
msgstr "{value, plural, one {Notification} other {Notifications}}"

Versions and environment

• Tolgee Platform version: tolgee/tolgee:v3.113.0
• Environment: Docker

[JanCizmar]

Hello! Thanks for reaching out!

Can you please specify the exact steps to reproduce?

[Erwane]

• Create a fresh project. Default language "english (en)"
• Add key "account.notification" with plural and english translations :
  One: Notification
  Other: Notifications
• validate the translation
• Export lang en, format: Gettext .po, ICU
• Open the .po file with poedit 3.5.2

Exporting PO with "php sprintf" instead of ICU create an error too.
The error is not in Tolgee but in PoEdit complaining about an invalid .po file.

[JanCizmar]

Thanks a lot! You're right it's a bug.

[kipe]

I'm not sure if this is related directly to this, but the "Plural-Forms: nplurals = 2; plural = (n > 1)\n" generated by Tolgee also seems to cause issues with Python.

From all the examples I've seen, there should be no spaces around the equal signs, so "Plural-Forms: nplurals = 2; plural = (n > 1)\n" would become "Plural-Forms: nplurals=2; plural=(n > 1)\n".

This causes an IndexError exception in Pythons gettext implementation, as the header is parsed by splitting with plural=: https://github.com/python/cpython/blob/main/Lib/gettext.py#L413

I can create another issue if needed.