Run shell script and use the result as a variable later to paste it in the window

Discussion & Questions
1

I need the following:

  1. run shell command to get the string result
  2. need to paste this value in later steps to some window

Please help, not much documentation on this.

2

You can do this with AppleScript.

First action:

-- run shell script (for example get macOS version)
set theResult to do shell script "sw_vers -productVersion"
-- save to BTT variable
tell application "BetterTouchTool"
	set_string_variable "SavedShellScriptResult" to theResult
end tell

Second action:

-- get the saved shell script result
tell application "BetterTouchTool"
	set theResult to get_string_variable "SavedShellScriptResult"
end tell
-- set the clipboard
set the clipboard to theResult
-- paste to current application
tell application "System Events" to keystroke "v" using command down

Note: You can only past anything to the current window of the current application!