How to add the current session file name in the status line in Vim?
session, vim
Solution
For this, Vim has the `:help filename-modifiers` like `:t` for the last component of the file. You can use them with the `fnamemodify()` function (or `expand()` if you want to modify a built-in Vim file identifier like `%`):
:echo fnamemodify(v:this_session, ':t')
Problem
I recently added the sessionman plugin to my Vim configuration, and I like it so far. I understand that Vim sets `v:this_session` to the session file name when a session is being used and I’d like to add it to my status line. Unfortunately, `v:this_session` contains the full file path and it is often way too long for it to fit in the status line. So my question is: How can I extract the file name without its full path from `v:this_session` and add it to my status line?