Set console font automatically when selecting language

Add console_font field to languages.json and Language dataclass.
When a language is activated, setfont is called automatically,
falling back to default8x16 on error or for languages without
a custom font. Also activate translation when loading language
from config file.

archinstall/lib/args.py

@@ -142,6 +142,7 @@ class ArchConfig:
 
 		if archinstall_lang := args_config.get('archinstall-language', None):
 			arch_config.archinstall_language = translation_handler.get_language_by_name(archinstall_lang)
+			translation_handler.activate(arch_config.archinstall_language)
 
 		if disk_config := args_config.get('disk_config', {}):
 			enc_password = args_config.get('encryption_password', '')

archinstall/lib/general/general_menu.py

@@ -106,9 +106,9 @@ async def select_archinstall_language(languages: list[Language], preset: Languag
 	group = MenuItemGroup(items, sort_items=True)
 	group.set_focus_by_value(preset)
 
-	title = 'NOTE: If a language can not displayed properly, a proper font must be set manually in the console.\n'
-	title += 'All available fonts can be found in "/usr/share/kbd/consolefonts"\n'
-	title += 'e.g. setfont LatGrkCyr-8x16 (to display latin/greek/cyrillic characters)\n'
+	title = 'NOTE: Console font will be set automatically for supported languages.\n'
+	title += 'For other languages, fonts can be found in "/usr/share/kbd/consolefonts"\n'
+	title += 'and set manually with: setfont <fontname>\n'
 
 	result = await Selection[Language](
 		header=title,

archinstall/lib/translationhandler.py

@@ -2,6 +2,7 @@ import builtins
 import gettext
 import json
 import os
+import subprocess
 from dataclasses import dataclass
 from pathlib import Path
 from typing import override
@@ -14,6 +15,7 @@ class Language:
 	translation: gettext.NullTranslations
 	translation_percent: int
 	translated_lang: str | None
+	console_font: str | None = None
 
 	@property
 	def display_name(self) -> str:
@@ -31,6 +33,28 @@ class Language:
 		return self.name_en
 
 
+_DEFAULT_FONT = 'default8x16'
+
+
+def _set_console_font(font_name: str | None) -> None:
+	"""
+	Set the console font via setfont.
+	Falls back to default8x16 if font_name is None or setfont fails.
+	"""
+	target = font_name or _DEFAULT_FONT
+
+	try:
+		result = subprocess.run(['setfont', target], capture_output=True, timeout=10)
+		if result.returncode != 0 and target != _DEFAULT_FONT:
+			subprocess.run(['setfont', _DEFAULT_FONT], capture_output=True, timeout=10)
+	except (FileNotFoundError, subprocess.TimeoutExpired, OSError):
+		if target != _DEFAULT_FONT:
+			try:
+				subprocess.run(['setfont', _DEFAULT_FONT], capture_output=True, timeout=10)
+			except (FileNotFoundError, subprocess.TimeoutExpired, OSError):
+				pass
+
+
 class TranslationHandler:
 	def __init__(self) -> None:
 		self._base_pot = 'base.pot'
@@ -57,6 +81,7 @@ class TranslationHandler:
 			abbr = mapping_entry['abbr']
 			lang = mapping_entry['lang']
 			translated_lang = mapping_entry.get('translated_lang', None)
+			console_font = mapping_entry.get('console_font', None)
 
 			try:
 				# get a translation for a specific language
@@ -71,7 +96,7 @@ class TranslationHandler:
 					# prevent cases where the .pot file is out of date and the percentage is above 100
 					percent = min(100, percent)
 
-				language = Language(abbr, lang, translation, percent, translated_lang)
+				language = Language(abbr, lang, translation, percent, translated_lang, console_font)
 				languages.append(language)
 			except FileNotFoundError as err:
 				raise FileNotFoundError(f"Could not locate language file for '{lang}': {err}")
@@ -133,6 +158,7 @@ class TranslationHandler:
 		"""
 		# The install() call has the side effect of assigning GNUTranslations.gettext to builtins._
 		language.translation.install()
+		_set_console_font(language.console_font)
 
 	def _get_locales_dir(self) -> Path:
 		"""

archinstall/locales/languages.json

@@ -169,7 +169,7 @@
  {"abbr": "tr", "lang": "Turkish", "translated_lang" :  "Türkçe"},
  {"abbr": "tw", "lang": "Twi"},
  {"abbr": "ug", "lang": "Uighur"},
- {"abbr": "uk", "lang": "Ukrainian"},
+ {"abbr": "uk", "lang": "Ukrainian", "console_font": "UniCyr_8x16"},
  {"abbr": "ur", "lang": "Urdu", "translated_lang": "اردو"},
  {"abbr": "uz", "lang": "Uzbek", "translated_lang": "O'zbek"},
  {"abbr": "ve", "lang": "Venda"},