Option to set session filename extension (issue #22)

Issue #22 on GitHub: #22

Author: xolox

README.md

@@ -93,6 +93,14 @@ Note that the session.vim plug-in automatically and unconditionally executes the
 
 This option controls the location of your session scripts. Its default value is `~/.vim/sessions` (on UNIX) or `~\vimfiles\sessions` (on Windows). If you don't mind the default you don't have to do anything; the directory will be created for you. Note that a leading `~` is expanded to your current home directory (`$HOME` on UNIX, `%USERPROFILE%` on Windows).
 
+### The `g:session_default_name` option
+
+The name of the default session without directory or filename extension (you'll never guess what the default is).
+
+### The `g:session_extension` option
+
+The filename extension of session scripts. This should include the dot that separates the basename from the extension. Defaults to '.vim'.
+
 ### The `g:session_autoload` option
 
 By default this option is set to `'prompt'`. This means that when you start Vim without opening any files and the `default` session script exists, the session plug-in will ask whether you want to restore your default session. When you set this option to `'yes'` and you start Vim without opening any files the default session will be restored without a prompt. To completely disable automatic loading you can set this option to `'no'`.

autoload/xolox/session.vim

@@ -3,7 +3,7 @@
 " Last Change: May 2, 2013
 " URL: http://peterodding.com/code/vim/session/
 
-let g:xolox#session#version = '1.6.1'
+let g:xolox#session#version = '1.6.2'
 
 call xolox#misc#compat#check('session', 2)
 
@@ -524,7 +524,7 @@ endfunction
 
 function! xolox#session#name_to_path(name) " {{{2
   let directory = xolox#misc#path#absolute(g:session_directory)
-  let filename = xolox#misc#path#encode(a:name) . '.vim'
+  let filename = xolox#misc#path#encode(a:name) . g:session_extension
   return xolox#misc#path#merge(directory, filename)
 endfunction
 
@@ -534,7 +534,7 @@ endfunction
 
 function! xolox#session#get_names() " {{{2
   let directory = xolox#misc#path#absolute(g:session_directory)
-  let filenames = split(glob(xolox#misc#path#merge(directory, '*.vim')), "\n")
+  let filenames = split(glob(xolox#misc#path#merge(directory, '*' . g:session_extension)), "\n")
   return map(filenames, 'xolox#session#path_to_name(v:val)')
 endfunction
 

doc/session.txt

@@ -16,13 +16,15 @@ Contents ~
  4. Options                                                    |session-options|
   1. The |sessionoptions| setting
   2. The |g:session_directory| option
-  3. The |g:session_autoload| option
-  4. The |g:session_autosave| option
-  5. The |g:session_default_to_last| option
-  6. The |g:session_persist_globals| option
-  7. The |g:session_restart_environment| option
-  8. The |g:session_command_aliases| option
-  9. The |g:loaded_session| option
+  3. The |g:session_default_name| option
+  4. The |g:session_extension| option
+  5. The |g:session_autoload| option
+  6. The |g:session_autosave| option
+  7. The |g:session_default_to_last| option
+  8. The |g:session_persist_globals| option
+  9. The |g:session_restart_environment| option
+  10. The |g:session_command_aliases| option
+  11. The |g:loaded_session| option
  5. Compatibility with other plug-ins |session-compatibility-with-other-plug-ins|
  6. Known issues                                          |session-known-issues|
  7. Contact                                                    |session-contact|
@@ -202,6 +204,18 @@ don't mind the default you don't have to do anything; the directory will be
 created for you. Note that a leading '~' is expanded to your current home
 directory ('$HOME' on UNIX, '%USERPROFILE%' on Windows).
 
+-------------------------------------------------------------------------------
+The *g:session_default_name* option
+
+The name of the default session without directory or filename extension
+(you'll never guess what the default is).
+
+-------------------------------------------------------------------------------
+The *g:session_extension* option
+
+The filename extension of session scripts. This should include the dot that
+separates the basename from the extension. Defaults to '.vim'.
+
 -------------------------------------------------------------------------------
 The *g:session_autoload* option
 

plugin/session.vim

@@ -16,6 +16,11 @@ if !exists('g:session_default_name')
   let g:session_default_name = 'default'
 endif
 
+" The file extension of session scripts.
+if !exists('g:session_extension')
+  let g:session_extension = '.vim'
+endif
+
 " When you start Vim without opening any files the plug-in will prompt you
 " whether you want to load the default session. Other supported values for
 " this option are 'yes' (to load the default session without prompting) and