Flutter-pi is not picking Locale from the system

[eximius313]

Although I have /etc/default/locale configured as:

LANG=en_GB.UTF-8

flutter-pi is not picking this locale and displays warning instead:

[locales] Warning: The system has no configured locale. The default "C" locale may or may not be supported by the app.
==============Locale==============
Flutter locale:
  default: C
  locales: C
===================================

[ardera]

flutter-pi gets its locale info from environment variables:
https://github.com/ardera/flutter-pi/blob/master/src/locales.c#L32-L56

First it checks LANGUAGE, then LC_ALL, then LC_MESSAGES and then LANG. If none of those are set it defaults to C.

Just putting it into /etc/default/locale might not be enough to make the system pickup the language. If you're on a pi, you can use raspi-config to configure the locale or otherwise you can use localectl and then update-locale.

[eximius313]

Both raspi-config and localectl are already set:

# localectl
System Locale: LANG=en_GB.UTF-8
VC Keymap: n/a
X11 Layout: us
X11 Model: pc105

so is LANG:

# echo $LANG
en_GB.UTF-8

[DoumanAsh]

@eximius313 is it the same if you just run env LANG=en_GB.UTF-8 ./flutter-pi?

[ardera]

Can you send me your cmdline output when you run export? Maybe something else mistakenly sets LANGUAGE=C.UTF-8 and that overrides the LANG environment variable.

[eximius313]

Ok, this is weird..
with reqular user, I get:

$ localectl
   System Locale: LANG=en_GB.UTF-8
       VC Keymap: n/a
      X11 Layout: us
       X11 Model: pc105

but:

$ echo "<$LANG>"
<>

with sudo, I get:

$ sudo echo "<$LANG>"
<>

but as a root I get:

# echo "<$LANG>"
<en_GB.UTF-8>

@DoumanAsh, when I run app like this:

$ LANGUAGE=LANG=en_GB.UTF-8 flutter-pi project
==============Locale==============
Flutter locale:
  default: en_GB
  locales: en_GB en.UTF-8 en.UTF-8 en.UTF-8 en_GB en en.UTF-8
===================================

Also

$ LANG=en_GB.UTF-8 flutter-pi project
==============Locale==============
Flutter locale:
  default: en_GB
  locales: en_GB en.UTF-8 en.UTF-8 en.UTF-8 en_GB en en.UTF-8

@ardera,
export output for root is indeed different than for my user (it has LANG set, while my user does not)
I have tried sudo locale-gen "en_GB.UTF-8" but without success...

It seems it's not the problem of flutter-pi but setting proper locale in user's shell.
Thanks for helping with pinpointing the issue

[eximius313]

Ok, the problem is solved by enabling PAM....
https://askubuntu.com/a/749442

[eximius313]

Damn... it is a bug in PAM that has over 10 years: https://bugs.launchpad.net/ubuntu/+source/openssh/+bug/920749

[ardera]

Oh lol
glad you could fix it though