[flatpak] fix -> some environment variables are not available during the common operations

bauh/commons/system.py

@@ -66,7 +66,8 @@ class SimpleProcess:
     def __init__(self, cmd: List[str], cwd: str = '.', expected_code: int = 0,
                  global_interpreter: bool = USE_GLOBAL_INTERPRETER, lang: str = DEFAULT_LANG, root_password: str = None,
                  extra_paths: Set[str] = None, error_phrases: Set[str] = None, wrong_error_phrases: Set[str] = None,
-                 shell: bool = False):
+                 shell: bool = False,
+                 success_phrases: Set[str] = None):
         pwdin, final_cmd = None, []
 
         self.shell = shell
@@ -80,6 +81,7 @@ class SimpleProcess:
         self.expected_code = expected_code
         self.error_phrases = error_phrases
         self.wrong_error_phrases = wrong_error_phrases
+        self.success_phrases = success_phrases
 
     def _new(self, cmd: List[str], cwd: str, global_interpreter: bool, lang: str, stdin = None, extra_paths: Set[str] = None) -> subprocess.Popen:
 
@@ -186,6 +188,12 @@ class ProcessHandler:
         success = proc.instance.returncode == proc.expected_code
         string_output = output.read()
 
+        if proc.success_phrases:
+            for phrase in proc.success_phrases:
+                if phrase in string_output:
+                    success = True
+                    break
+
         if not success and proc.wrong_error_phrases:
             for phrase in proc.wrong_error_phrases:
                 if phrase in string_output: