Show message on Ctrl+C

- CLI-mode: Show text "Programm interrupted by user." instead of error message when Ctrl+C was pressed.
- CLI-mode: Removed obsolete trace messages

CHANGELOG.md

@@ -1,5 +1,10 @@
 # Changelog Backuppy
 
+## [0.8.1] - 2021-05-10
+### Fixed
+- CLI-mode: Show text "Programm interrupted by user." instead of error message when Ctrl+C was pressed.
+- CLI-mode: Removed obsolete trace messages
+
 ## [0.8] - 2021-05-07
 ### Added
 - GUI-mode: Introduce "Browse"-button on directory-selection dialogs

install.py

@@ -35,8 +35,16 @@ def set_language(language):
     global LANGUAGE
     LANGUAGE = language
 
-def trace(message_txt):
-    """ Print a formatted message to std out. """
+def trace(message_txt, prefix_crlf=False):
+    """ Print a formatted message to std out.
+
+    :param "message_txt"    [in] The message text that should be displayed.
+    :param "prefix_crlf"    [in] If True, a carriage return/line feed will be done prior to the message text.
+    
+    """
+
+    if prefix_crlf:
+        print("\n")
     print("[  OK  ] " + message_txt)
 
 def get_lang_text(search_str: str):
@@ -48,6 +56,7 @@ def get_lang_text(search_str: str):
     return return_str
 
 def main_install_cli():
+    try:
         language = input("Hello, first of all, which language do you prefer: German [DE] or English [EN]?\n> ")
         if language.upper() == "DE":
             set_language(LANG_DE)
@@ -108,6 +117,11 @@ def main_install_cli():
 
         return True, EXCLUDE, RSYNC_CMD
 
+    except KeyboardInterrupt:
+        trace("Programm interrupted by user.", prefix_crlf=True)
+        return False, None, None
+
+
 def create_exclude_file(directory, exclude_file):
     exclude_file = os.path.join(directory, exclude_file)
     with open(exclude_file, "w") as fExclude:
@@ -170,12 +184,6 @@ def main(argv):
     else:
         trace("Starting CLI-version.\n")
         is_finalized, is_exclude, rsync_cmd = main_install_cli()  # collect user input via CLI and store in env. variables
-        if is_finalized:
-            print("CLI finalized.")
-        if is_exclude:
-            print("exclude is true.")
-        if rsync_cmd:
-            print("rsync command returned: " + rsync_cmd)
 
     if is_finalized:
         do_the_install(is_exclude, rsync_cmd)