Implement w!

pyvim/commands/commands.py

@@ -318,7 +318,7 @@ def write(editor, location, force=False):
         if location is None and eb.location is None:
             editor.show_message(_NO_FILE_NAME)
         else:
-            eb.write(location)
+            eb.write(location, force)
 
 
 @location_cmd('wq', accepts_force=True)
@@ -327,7 +327,7 @@ def write_and_quit(editor, location, force=False):
     Write file and quit.
     """
     write(editor, location, force=force)
-    editor.cli.set_return_value('')
+    quit(editor, all_=False, force=force)
 
 
 @cmd('cq')
@@ -341,17 +341,13 @@ def quit_nonzero(editor):
     sys.exit(1)
 
 
-@cmd('wqa')
-def write_and_quit_all(editor):
+@location_cmd('wqa', accepts_force=True)
+def write_and_quit_all(editor, location, force=False):
     """
     Write current buffer and quit all.
     """
-    eb = editor.window_arrangement.active_editor_buffer
-    if eb.location is None:
-        editor.show_message(_NO_FILE_NAME)
-    else:
-        eb.write()
-        quit(editor, all_=True, force=False)
+    write(editor, location, force=force)
+    quit(editor, all_=True, force=force)
 
 
 @cmd('h')

pyvim/editor_buffer.py

@@ -7,6 +7,7 @@
 
 from six import string_types
 
+import stat
 import os
 import weakref
 
@@ -110,7 +111,7 @@ def reload(self):
         self.buffer.document = Document(text, cursor_position)
         self._file_content = text
 
-    def write(self, location=None):
+    def write(self, location=None, force=False):
         """
         Write file to I/O backend.
         """
@@ -127,15 +128,40 @@ def write(self, location=None):
             self.editor.show_message('Unknown location: %r' % location)
 
         # Write it.
-        try:
-            io.write(self.location, self.buffer.text + '\n', self.encoding)
-            self.is_new = False
-        except Exception as e:
-            # E.g. "No such file or directory."
-            self.editor.show_message('%s' % e)
-        else:
-            # When the save succeeds: update: _file_content.
-            self._file_content = self.buffer.text
+        toggle_write_permission = False
+        done = False
+        while (not done):
+            try:
+                io.write(self.location, self.buffer.text + '\n', self.encoding)
+                self.is_new = False
+                if toggle_write_permission:
+                    try:
+                        os.chmod(self.location, os.stat(self.location).st_mode & ~stat.S_IWRITE)
+                        done = True
+                    except Exception as e:
+                        self.editor.show_message('%s' % e)
+                        done = True
+            except Exception as e:
+                if os.path.isfile(self.location) and (not os.access(self.location, os.W_OK)): # File is not writable
+                    if force:
+                        if not toggle_write_permission:
+                            try:
+                                os.chmod(self.location, os.stat(self.location).st_mode | stat.S_IWRITE)
+                                toggle_write_permission = True
+                            except Exception as e:
+                                self.editor.show_message('%s' % e)
+                                done = True
+                        else:
+                            # E.g. "No such file or directory."
+                            self.editor.show_message('%s' % e)
+                            done = True
+                    else:
+                        self.editor.show_message("'readonly' option is set (add ! to override)")
+                        done = True
+            else:
+                # When the save succeeds: update: _file_content.
+                self._file_content = self.buffer.text
+                done = True
 
     def get_display_name(self, short=False):
         """