Write alias only if not already existing

CHANGELOG.md

@@ -1,6 +1,10 @@
 # Changelog Backuppy
 
-## [1.02.000] - 2021-05-05
+## [0.6] - 2021-05-06
+### Added
+- Write alias to Backuppy.sh into .bashrc/.zshrc only if not already existing
+
+## [0.5.2] - 2021-05-05
 ### Added
 - Now fully functional as the shell version
 
@@ -11,11 +15,11 @@
 ### Fixed
 - Fixed problem with the Bash/ZSH config
 
-## [1.01.001] - 2021-05-04
+## [0.5.1] - 2021-05-04
 ### Changed
 - Use E-MAIL constant
 
-## [1.01.000] - 2021-05-04
+## [0.5] - 2021-05-04
 ### Added
 - Graphical installer based on Python3 with PySide2 GUI framework (Qt-bindings for Python)
 - Changelog.MD

install.py

@@ -1,7 +1,7 @@
 #!/usr/bin/env python3
 """
 project: Backuppy
-version: 1.02.000
+version: 0.6
 file: install.py
 summary: main entry python file
 """
@@ -10,16 +10,14 @@ summary: main entry python file
 import os
 
 # Third party imports
-from PySide2 import QtCore
-from PySide2 import QtGui
-from PySide2 import QtCore, QtWidgets
+from PySide2 import QtWidgets
 
 # local imports
 from languages import english
 from languages import german
 
 # local globals
-VERSION: str = "1.02.000"
+VERSION: str = "0.6"
 EMAIL: str = "fotocoder@joschu.ch"
 TARGET_SCRIPT: str = "Backuppy.sh"
 EXCLUDE_FILE: str = "exclude.txt"
@@ -44,7 +42,7 @@ def get_lang_text(search_str: str):
 
 def trace(message_txt: str):
     """ Print a formatted message to std out. """
-    print(f"[  OK  ]", message_txt)
+    print("[  OK  ]" + message_txt)
 
 class BackuppyWizard(QtWidgets.QWizard):
     def __init__(self, parent=None):
@@ -295,20 +293,29 @@ def create_shell_script(command_str: str):
     user_home = os.environ.get("HOME")
 
     ## STEP 1: update shell config scripts with alias for backuppy
-    # .zshrc case1 and case2
-    if current_shell in ("/usr/bin/zsh", "/bin/zsh"):
-        # Appending to bash config file
+    # Check for installed ZSH
+    if current_shell.upper().find("ZSH") > 0:
         rc_filepath = os.path.join(user_home, ".zshrc")
 
-    # .bashrc case1 and case2
-    elif current_shell in ("/usr/bin/bash", "/bin/bash"):
-        # Appending to zsh config file
+    # Check for installed BASH
+    if current_shell.upper().find("BASH") > 0:
         rc_filepath = os.path.join(user_home, ".bashrc")
 
+    # Append our alias if not already existing
     if os.path.isfile(rc_filepath):
-        with open(rc_filepath, 'a') as file1:
+        fileRc = open(rc_filepath, "r")  # open file in read mode
+
+        backuppy_entry_exists = False
+        for line in fileRc:    
+            if "alias backuppy=" in line:
+                backuppy_entry_exists = True
+                break
+
+        if not backuppy_entry_exists:    
             trace(f"Writing {ALIAS_STR} to config file '{rc_filepath}'.")
-            file1.write("\n# Following line was created by Backuppy\n" + ALIAS_STR + "\n")
+            fileRc = open(rc_filepath, "a")  # open file in append mode
+            fileRc.write("\n# Following line was created by Backuppy\n" + ALIAS_STR + "\n")
+        fileRc.close()
 
     ## STEP 2: Create the exclude script if desired
     if EXCLUDE: