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cache location of session file #10

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Jul 24, 2015
Merged

cache location of session file #10

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32 changes: 26 additions & 6 deletions plugin/gitsessions.vim
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Original file line number Diff line number Diff line change
Expand Up @@ -31,6 +31,13 @@ if !exists('s:session_exist')
let s:session_exist = 0
endif

" Cache session file,
" Pros: performance gain (x100) on large repositories
" Cons: switch between git branches will be missed from GitSessionUpdate()
" You are advised to save it manually by calling to GitSessionSave()
" Default - cache disabled
let g:cache_session_file = 0

" HELPER FUNCTIONS

function! s:replace_bad_chars(string)
Expand Down Expand Up @@ -102,17 +109,24 @@ function! s:session_dir()
endif
endfunction

function! s:session_file()
function! s:session_file(invalidate_cache)
if g:cache_session_file && !a:invalidate_cache && exists('s:cached_session_file')
return s:cached_session_file
endif
let l:dir = s:session_dir()
let l:branch = s:git_branch_name()
return (empty(l:branch)) ? l:dir . '/master' : l:dir . '/' . l:branch
if exists('s:cached_session_file')
unlet s:cached_session_file
endif
let s:cached_session_file = (empty(l:branch)) ? l:dir . '/master' : l:dir . '/' . l:branch
return s:cached_session_file
endfunction

" PUBLIC FUNCTIONS

function! g:GitSessionSave()
let l:dir = s:session_dir()
let l:file = s:session_file()
let l:file = s:session_file(1)

if !isdirectory(l:dir)
call mkdir(l:dir, 'p')
Expand Down Expand Up @@ -141,7 +155,7 @@ endfunction

function! g:GitSessionUpdate(...)
let l:show_msg = a:0 > 0 ? a:1 : 1
let l:file = s:session_file()
let l:file = s:session_file(0)

if s:session_exist && filereadable(l:file)
execute 'mksession!' l:file
Expand All @@ -157,7 +171,7 @@ function! g:GitSessionLoad(...)
endif

let l:show_msg = a:0 > 0 ? a:1 : 0
let l:file = s:session_file()
let l:file = s:session_file(1)

if filereadable(l:file)
let s:session_exist = 1
Expand All @@ -170,8 +184,14 @@ function! g:GitSessionLoad(...)
endfunction

function! g:GitSessionDelete()
let l:file = s:session_file()
" Delete is a tricky case, we still need to use cached version if any.
" This version was used and saved by GitSessionUpdate(), however
" we should ensure that session cached variable is cleared.
let l:file = s:session_file(1)
let s:session_exist = 0
if exists('s:cached_session_file')
unlet s:cached_session_file
endif
if filereadable(l:file)
call delete(l:file)
echom "session deleted:" l:file
Expand Down