Set LANG to fully qualified locale name

Author: codefiles

archinstall/lib/installer.py

@@ -660,16 +660,12 @@ def set_locale(self, locale_config: LocaleConfiguration) -> bool:
 		# in the first column of the entry; check for both cases.
 		entry_re = re.compile(rf'#{lang}(\.{encoding})?{modifier} {encoding}')
 
-		lang_value = None
 		for index, line in enumerate(locale_gen_lines):
 			if entry_re.match(line):
-				uncommented_line = line.removeprefix('#')
-				locale_gen_lines[index] = uncommented_line
+				locale_gen_lines[index] = line.removeprefix('#')
 				locale_gen.write_text(''.join(locale_gen_lines))
-				lang_value = uncommented_line.split()[0]
 				break
-
-		if lang_value is None:
+		else:
 			error(f"Invalid locale: language '{locale_config.sys_lang}', encoding '{locale_config.sys_enc}'")
 			return False
 
@@ -679,7 +675,7 @@ def set_locale(self, locale_config: LocaleConfiguration) -> bool:
 			error(f'Failed to run locale-gen on target: {e}')
 			return False
 
-		(self.target / 'etc/locale.conf').write_text(f'LANG={lang_value}\n')
+		(self.target / 'etc/locale.conf').write_text(f'LANG={lang}.{encoding}{modifier}\n')
 		return True
 
 	def set_timezone(self, zone: str) -> bool: