Add support for wt.exe to run commands in the current Terminal Window

[plusls]

Description of the new feature/enhancement

I found that wt.exe can open a new window and split it, can it split current window like tmux split-window -v, tmux split-window -h?
like this:

Proposed technical implementation details (optional)

[zadjii-msft]

Yep, it absolutely can! See this doc for more details.

terminal/doc/user-docs/UsingCommandlineArguments.md

Lines 115 to 130 in 9df9bd0

	Consider the following commandline:
	```powershell
	wt ; split-pane -p "Windows PowerShell" ; split-pane -H wsl.exe
	```
	This creates a new Windows Terminal window with one tab, and 3 panes:
	* `wt`: Creates the new tab with the default profile
	* `split-pane -p "Windows PowerShell"`: This will create a new pane, split from
	the parent with the default profile. This pane will open with the "Windows
	PowerShell" profile
	* `split-pane -H wsl.exe`: This will create a third pane, slit _horizontally_
	from the "Windows PowerShell" pane. It will be running the default profile,
	and will use `wsl.exe` as the commandline (instead of the default profile's
	`commandline`).

Consider the following commandline:

wt ; split-pane -p "Windows PowerShell" ; split-pane -H wsl.exe 

This creates a new Windows Terminal window with one tab, and 3 panes:

• wt: Creates the new tab with the default profile
• split-pane -p "Windows PowerShell": This will create a new pane, split from the parent with the default profile. This pane will open with the "Windows PowerShell" profile
• split-pane -H wsl.exe: This will create a third pane, slit horizontally from the "Windows PowerShell" pane. It will be running the default profile, and will use wsl.exe as the commandline (instead of the default profile's commandline).

[plusls]

but i want split current window

[plusls]

wt ; split-pane -p "Windows PowerShell" ; split-pane -H wsl.exe 

it will open a new terminal...

[zadjii-msft]

Sure yea you can do that in the current window. Use the splitPane keybindings. By default, these are bound to the following keys:

terminal/src/cascadia/TerminalApp/defaults.json

Lines 242 to 243 in 39d3c65

	{ "command": { "action": "splitPane", "split": "horizontal"}, "keys": [ "alt+shift+-" ] },
	{ "command": { "action": "splitPane", "split": "vertical"}, "keys": [ "alt+shift+plus" ] },

[plusls]

but I want use a shell command to do it, I want to write it in my script.

[zadjii-msft]

Unfortunately, that's not supported quite yet. It's mentioned in the "future considerations" part of the original spec. It's sort-of tracked as a sub-point in #4632, but there's not a dedicated thread for it yet.

Congratulations, this is now the thread

[DHowett-MSFT]

We actually do have a thread for it, /dup #4472!

[ghost]

Hi! We've identified this issue as a duplicate of another one that already exists on this Issue Tracker. This specific instance is being closed in favor of tracking the concern over on the referenced thread. Thanks for your report!

[lewis-munyi]

Description of the new feature/enhancement

I found that wt.exe can open a new window and split it, can it split current window like tmux split-window -v, tmux split-window -h?
like this:

Proposed technical implementation details (optional)

@plusls I use this workaround.

Create a function in my default profile that opens the new tab with split windows and exits the previous tab.

# %USERPROFILE%\OneDrive\Documents\WindowsPowerShell\Microsoft.PowerShell_profile.ps1
Function split{
    # Open window with split panes
    start-process wt ' -p "Windows Powershell" ; split-pane -p "Windows Powershell" ; split-pane -H -p "Ubuntu"';
    # Exit
    echo "Exiting...!";
    Exit(0);
}

Then call the function from the terminal when needed.

> split