Editing a Perforce label's description through a script

Question

I want to modify an existing Perforce label using a script that I can invoke automatically. Currently I know how to do it using the text editor option:

p4 label <label-name>

This opens up a temporary file in my default text editor, I can then enter a description, save the file and close - updates the label successfully.

However, I want to be able to do this automatically using a script. I will have variables that can be used to form my description.

I can use either a shell script or a bat script (on Windows but have Cygwin).

Perforce command line documentation on labels can be found here, but it's not helping me.

Any ideas?

Answer 1

You would do something along those lines:

p4 label -o  > label.txt
sed -i 's/old/new/g' label.txt  # or any other automated method to do the modification
p4 label -i < label.txt