Vim-sessions under Windows
From Vim Tips Wiki
created 2005 · complexity basic · author Ivan Tishchenko · version 6.0
It's easy to set up Windows file associations so that double-clicking a file in Windows Explorer will open the file in Vim. However, for some types of file, Vim can do more than just edit the file. For example, Vim scripts can be executed, and session files can be loaded to restore a previous editing session. In addition, some plugins like project.vim have configuration files that can be loaded to perform special operations.
While it is nice to be able to edit session, project, and vimscript files using a right-click menu, wouldn't it be nice to be able to run the script, load the session, or open the project just by double-clicking the file? Using Vim's command-line arguments in the file associations, it is very easy to do this!
Note that some of the methods discussed below suggest modifying your Windows Registry.
 Launching session files
A session file is a script created by Vim in order to save the current editing session (window layout, buffer file names, mappings, and more). You can use a session file to save the state of a project that you are working on. After you have opened all the files in your project and arranged the windows as required, use the command
:mksession projectname.vis to save the session. Replace
projectname.vis with whatever name you like, although the following assumes that extension
.vis is used. You can include a path so the session file is saved in a convenient directory (or your desktop). The task of entering a path is made easier by pressing the Tab key to complete partially-entered directory or file names.
Later, you can restore the session by starting Vim and sourcing the session script. You could do that at command prompt as in this example:
gvim -S projectname.vis
It is also possible to define a file association so that double clicking
projectname.vis in Windows Explorer opens the session.
 Using console utilities
The easiest way to set up a new file association is to enter the following commands at the command prompt. You need to do this as an administrator because the file association will apply to all users. Change the path to where your gvim is installed.
assoc .vis=vimsession ftype vimsession="C:\Program Files\Vim\vim72\gvim.exe" -S "%1"
 Using the registry
The following alternative does not require administrative privilege because it applies the file association only for the current user. Place the following lines in file
sessions.reg (for example) and execute it. Change the path to where your gvim is installed.
REGEDIT4 [HKEY_CURRENT_USER\Software\Classes\.vis] @="vim_session_file" [HKEY_CURRENT_USER\Software\Classes\vim_session_file] @="Vim saved session" [HKEY_CURRENT_USER\Software\Classes\vim_session_file\shell\open\command] @="C:\\Program Files\\Vim\\vim72\\gvim.exe -S \"%1\""
 Running Vim scripts
- use ftype and assoc commands
- add explanation
[HKEY_CLASSES_ROOT\.vim] @="vim_auto_file" [HKEY_CLASSES_ROOT\vim_auto_file] @="GVim script" [HKEY_CLASSES_ROOT\vim_auto_file\shell\edit\command] @="C:\\Program Files\\Vim\\vim72\\gvim.exe -c \"try|source %1|q|endtry\""
 Opening project.vim project files
If you use the project.vim plugin on Windows XP, it is useful to associate
.vimprojects files with Vim so they can be opened with a double-click in Explorer.
 Using console utilities
The easiest way to set up a new file association is to enter the following commands, as an administrator, at the command prompt:
assoc .vimprojects=vimproj ftype vimproj="C:\Program Files\Vim\vim72\gvim.exe" -c ":Project %1"
 Using the registry
Alternatively, you can use the following .reg file to associate .vimprojects to open a project file in Vim. This will also set up an icon for the project file to make it obvious that it opens in Vim.
Windows Registry Editor Version 5.00 [HKEY_CLASSES_ROOT\.vimprojects] @="vimprojects_auto_file" [HKEY_CLASSES_ROOT\vimprojects_auto_file] @="" [HKEY_CLASSES_ROOT\vimprojects_auto_file\DefaultIcon] @="C:\\Program Files\\Vim\\vim72\\gvim.exe,0" [HKEY_CLASSES_ROOT\vimprojects_auto_file\shell\edit\command] @="C:\\Program Files\\Vim\\vim72\\gvim.exe -c \":Project %1\""
- TO DO
Probably should change "
...\shell\edit\command" from edit to open.
I'm pretty sure it's supposed to be "open". From what I understand, the action name will appear in the context menu as given (so right-click, choose "Edit" to run a vim script? I don't think so). I'm not sure exactly how Windows determines which action to use on a double-click, but "ftype" adds an entry using "open" and not "edit", so I am pretty sure that's the correct one to use here. It might be worth tracking down. #windows on Freenode has been a good resource for me in the past, I'll probably ask there unless somebody figures this out sooner.