Define an standard locale for all the commands executed (#827)

* Define an standard locale for all the commands executed inside the application

* Allow LC_ALL to be overriden during call

* flake8 corrections

archinstall/lib/general.py

@@ -188,7 +188,8 @@ class SysCommandWorker:
 		self.cmd = cmd
 		self.callbacks = callbacks
 		self.peak_output = peak_output
-		self.environment_vars = environment_vars
+		# define the standard locale for command outputs. For now the C ascii one. Can be overriden
+		self.environment_vars = {'LC_ALL':'C' , **environment_vars}
 		self.logfile = logfile
 		self.working_directory = working_directory
 
@@ -368,7 +369,7 @@ class SysCommand:
 		peak_output :Optional[bool] = False,
 		environment_vars :Optional[Dict[str, Any]] = None,
 		working_directory :Optional[str] = './'):
-	
+
 		_callbacks = {}
 		if callbacks:
 			for hook, func in callbacks.items():

archinstall/lib/luks.py

@@ -179,8 +179,8 @@ class luks2:
 			raise OSError(2, f"Could not import {path} as a disk encryption key, file is missing.", str(path))
 
 		log(f'Adding additional key-file {path} for {self.partition}', level=logging.INFO)
-
-		worker = SysCommandWorker(f"/usr/bin/cryptsetup -q -v luksAddKey {self.partition.path} {path}")
+		worker = SysCommandWorker(f"/usr/bin/cryptsetup -q -v luksAddKey {self.partition.path} {path}",
+							environment_vars={'LC_ALL':'C'})
 		pw_injected = False
 		while worker.is_alive():
 			if b'Enter any existing passphrase' in worker and pw_injected is False: