Automatically load and/or dump session files.
Easiest installation is to use Vundle or similar. I absolutely recommend high-level plugin management.
That said, you can copy plugin/autosession.vim to ~/.vim/plugin and everything
should work fine.
Once installed, a command :Autosession becomes available.
:Autosession is intended to be used in a .gvimrc or .vimrc. It will look
for .session.vim in the current directory. If the local session file does not
exist, it will look for ~/.vim/<directory>.session.vim. If it finds a session
file, it will try to load the session it finds. Then when vim exits, it will
save the session. If no session file was found, it will save the session to the
initial working directory.
:Autosession <session-file> can be used to declare the name of a session file
for the current window. If <session-file> exists, it will be sourced.
This isn't a sophisticated plugin, as is probably evident. It could stand a lot of polish. But none of the other session-management plugins available seemed to do exactly what I wanted, which was a very low-effort restoration of my working state between editing sessions, but tracked separately for separate projects or repositories. Maybe I didn't look hard enough, because this seems pretty simple.
This plugin could stand a lot of improvement, but it fills my immediate need. I am interested in where it falls short for other people!