Launching programs in new windows/tabs¶
kitty has a launch action that can be used to run arbitrary programs
in new windows/tabs. It can be mapped to user defined shortcuts in kitty.conf.
It is very powerful and allows sending the contents of
the current window to the launched program, as well as many other options.
In the simplest form, you can use it to open a new kitty window running the shell, as shown below:
map f1 launch
To run a different program simply pass the command line as arguments to launch:
map f1 launch vim path/to/some/file
To open a new window with the same working directory as the currently active window:
map f1 launch --cwd=current
To open the new window in a new tab:
map f1 launch --type=tab
To pass the contents of the current screen and scrollback to the started process:
map f1 launch --stdin-source=@screen_scrollback less
There are many more powerful options, refer to the complete list below.
The piping environment¶
When using launch --stdin-source, the program to which the data is
piped has a special environment variable declared, KITTY_PIPE_DATA whose
contents are:
KITTY_PIPE_DATA={scrolled_by}:{cursor_x},{cursor_y}:{lines},{columns}
where scrolled_by is the number of lines kitty is currently scrolled by,
cursor_(x|y) is the position of the cursor on the screen with (1,1)
being the top left corner and {lines},{columns} being the number of rows
and columns of the screen.
Special arguments¶
There are a few special placeholder arguments that can be specified as part of
the command line. Namely @selection which is replaced by the current
selection and @active-kitty-window-id which is replaced by the id of the
currently active kitty window. For example:
map f1 launch my-program @active-kitty-window-id
Watching launched windows¶
The launch --watcher option allows you to specify python functions
that will be called at specific events, such as when the window is resized or
closed. Simply specify the path to a python module that specifies callback
functions for the events you are interested in, for example:
def on_resize(boss, window, data):
# Here data will contain old_geometry and new_geometry
def on_focus_change(boss, window, data):
# Here data kill contain focused
def on_close(boss, window, data):
# called when window is closed, typically when the program running in
# it exits.
Every callback is passed a reference to the global Boss object as well as
the Window object the action is occurring on. The data object is
mapping that contains event dependent data. Some useful methods and attributes
for the Window object are: as_text(as_ans=False, add_history=False,
add_wrap_markers=False, alternate_screen=False) with which you can get the
contents of the window and its scrollback buffer. Similarly,
window.child.pid is the PID of the processes that was launched
in the window and window.id is the internal kitty id of the
window.
Syntax reference¶
launch [options] [program-to-run ...]
Launch an arbitrary program in a new kitty window/tab. Note that
if you specify a program-to-run you can use the special placeholder
@selection which will be replaced by the current selection.
Options¶
-
--title<WINDOW_TITLE>,--window-title<WINDOW_TITLE>¶ The title to set for the new window. By default, title is controlled by the child process.
-
--tab-title<TAB_TITLE>¶ The title for the new tab if launching in a new tab. By default, the title of the active window in the tab is used as the tab title.
-
--type<TYPE>¶ Where to launch the child process, in a new kitty window in the current tab, a new tab, or a new OS window or an overlay over the current window. Note that if the current window already has an overlay, then it will open a new window. The value of background means the process will be run in the background. The values clipboard and primary are meant to work with
launch --stdin-sourceto copy data to the system clipboard or primary selection. Default:windowChoices:background, clipboard, os-window, overlay, primary, tab, window
-
--keep-focus¶ Keep the focus on the currently active window instead of switching to the newly opened window.
-
--cwd<CWD>¶ The working directory for the newly launched child. Use the special value
currentto use the working directory of the currently active window.
-
--env<ENV>¶ Environment variables to set in the child process. Can be specified multiple times to set different environment variables. Syntax: name=value.
-
--copy-colors¶ Set the colors of the newly created window to be the same as the colors in the currently active window.
-
--copy-cmdline¶ Ignore any specified command line and instead use the command line from the currently active window.
-
--copy-env¶ Copy the environment variables from the currently active window into the newly launched child process. Note that most shells only set environment variables for child processes, so this will only copy the environment variables that the shell process itself has not the environment variables child processes inside the shell see. To copy that enviroment, use the kitty remote control feature with
kitty @launch --copy-env.
-
--location<LOCATION>¶ Where to place the newly created window when it is added to a tab which already has existing windows in it.
afterandbeforeplace the new window before or after the active window.neighboris a synonym forafter. Also applies to creating a new tab, where the value ofafterwill cause the new tab to be placed next to the current tab instead of at the end. The values ofvsplitandhsplitare only used by thesplitslayout and control if the new window is placed in a vertical or horizontal split with the currently active window. The default is to place the window in a layout dependent manner, typically, after the currently active window. Default:defaultChoices:after, before, default, first, hsplit, last, neighbor, vsplit
-
--allow-remote-control¶ Programs running in this window can control kitty (if remote control is enabled). Note that any program with the right level of permissions can still write to the pipes of any other program on the same computer and therefore can control kitty. It can, however, be useful to block programs running on other computers (for example, over ssh) or as other users.
-
--stdin-source<STDIN_SOURCE>¶ Pass the screen contents as
STDINto the child process.@selectionis the currently selected text.@screenis the contents of the currently active window.@screen_scrollbackis the same as@screen, but includes the scrollback buffer as well.@alternateis the secondary screen of the current active window. For example if you run a full screen terminal application, the secondary screen will be the screen you return to when quitting the application. Default:noneChoices:@alternate, @alternate_scrollback, @screen, @screen_scrollback, @selection, none
-
--stdin-add-formatting¶ When using
launch --stdin-sourceadd formatting escape codes, without this only plain text will be sent.
-
--stdin-add-line-wrap-markers¶ When using
launch --stdin-sourceadd a carriage return at every line wrap location (where long lines are wrapped at screen edges). This is useful if you want to pipe to program that wants to duplicate the screen layout of the screen.
-
--marker<MARKER>¶ Create a marker that highlights text in the newly created window. The syntax is the same as for the
toggle_markermap action (see Marks).
-
--os-window-class<OS_WINDOW_CLASS>¶ Set the WM_CLASS property on X11 and the application id property on Wayland for the newly created OS Window when using
launch --type=os-window. Defaults to whatever is used by the parent kitty process, which in turn defaults tokitty.
-
--os-window-name<OS_WINDOW_NAME>¶ Set the WM_NAME property on X11 for the newly created OS Window when using
launch --type=os-window. Defaults tolaunch --os-window-class.
-
--watcher<WATCHER>,-w<WATCHER>¶ Path to a python file. Appropriately named functions in this file will be called for various events, such as when the window is resized, focused or closed. See the section on watchers in the launch command documentation Launching programs in new windows/tabs. Relative paths are resolved relative to the kitty config directory.