Add Windows PATH manipulation functionality during installation

install.py

@@ -28,6 +28,35 @@ def mkdir(path, dryrun=False):
     if not dryrun and not os.path.exists(path):
         os.makedirs(path)
 
+def mkdir(path, dryrun=False):
+    print('creating directory:', path)
+    if not dryrun and not os.path.exists(path):
+        os.makedirs(path)
+
+def update_windows_path(bin_dir, dryrun=False):
+    """Add bin directory to Windows user PATH if not present"""
+    if dryrun or platform.system() != 'Windows':
+        return True
+    try:
+        import winreg
+        with winreg.OpenKey(winreg.HKEY_CURRENT_USER, "Environment", 0, winreg.KEY_ALL_ACCESS) as key:
+            try:
+                current_path = winreg.QueryValueEx(key, "Path")[0]
+            except FileNotFoundError:
+                current_path = ""
+            
+            # Check if bin_dir is already in PATH
+            path_entries = [entry.strip() for entry in current_path.split(';') if entry.strip()]
+            normalized_bin_dir = os.path.normpath(str(bin_dir))
+            normalized_entries = [os.path.normpath(entry) for entry in path_entries]
+            
+            if normalized_bin_dir not in normalized_entries:
+                new_path = current_path + ";" + str(bin_dir) if current_path else str(bin_dir)
+                winreg.SetValueEx(key, "Path", 0, winreg.REG_EXPAND_SZ, new_path)
+        return True
+    except Exception:
+        return False
+
 
 def modify_autojump_sh(etc_dir, share_dir, dryrun=False):
     """Append custom installation path to autojump.sh"""
@@ -157,7 +186,10 @@ def parse_arguments():  # noqa
 
 def show_post_installation_message(etc_dir, share_dir, bin_dir):
     if platform.system() == 'Windows':
-        print('\nPlease manually add %s to your user path' % bin_dir)
+        if update_windows_path(bin_dir, dryrun):
+            print('\nAutojump has been added to your user path')
+        else:
+            print('\nPlease manually add %s to your user path' % bin_dir)
     else:
         if get_shell() == 'fish':
             aj_shell = '%s/autojump.fish' % share_dir
@@ -229,7 +261,7 @@ def main(args):
         if args.custom_install:
             modify_autojump_sh(etc_dir, share_dir, args.dryrun)
 
-    show_post_installation_message(etc_dir, share_dir, bin_dir)
+    show_post_installation_message(etc_dir, share_dir, bin_dir, args.dryrun)
 
 
 if __name__ == '__main__':