Question

In Vim by default when you enter :e and hit the up arrow, it shows a list of files previously opened using the :e command. Is there a way to add files that I’ve opened from the terminal via vim <filename> to this list as well?

Answer 1

One possibility:

au BufEnter * for f in argv() | call histadd( "cmd", "e " . f ) | endfor

Explanation:

au                                # Autocommand.
BufEnter                          # Run it after entering a buffer.
*                                 # For any file matching.
for f in argv()                   # Select files in argument list.
call histadd( "cmd", "e " . f )   # Append to history of ex commands (beginning 
                                  # with colon) letter 'e' (of edit) with file name.
endfor                            # Repeat next loop.

Put that command in your vimrc file and try.