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"
" auto_backupdir.vim: Configure 'backupdir' automatically, including trying
" hard to create it.
"
" Author: Tom Ryder <tom@sanctum.geek.nz>
" License: Same as Vim itself
"
if exists('g:loaded_auto_backupdir') || &compatible
finish
endif
let g:loaded_auto_backupdir = 1
" Define the backup path we want
if exists('$VIM_BACKUPDIR')
let s:backupdir = $VIM_BACKUPDIR
else
" This is imperfect in that it will break if you have a backslashed comma in
" the first component of your &runtimepath, but if you're doing that, you
" probably already have way bigger problems
let s:backupdir
\ = strpart(&runtimepath, 0, stridx(&runtimepath, ','))
\ . '/backup'
endif
" If the prospective backup directory does not exist, try hard to create it
if !isdirectory(expand(s:backupdir))
" Try Vim's native mkdir() first
if exists('*mkdir')
silent! call mkdir(expand(s:backupdir), 'p', 0700)
" Failing that, use an OS-dependent command
" (Fortunately, Unix and Windows are the only OS types in the world)
elseif has('unix')
silent! execute '!mkdir -m 0700 -p '
\ . shellescape(expand(s:backupdir))
elseif has('win32') || has('win64')
silent! execute '!mkdir '
\ . shellescape(expand(s:backupdir))
endif
endif
" If the directory exists after that...
if isdirectory(expand(s:backupdir))
" Set the backup directory and turn backups on
execute 'set backupdir^=' . s:backupdir . '//'
set backup
" If not, give up and raise an error
else
echoerr 'Could not create backupdir ' . s:backupdir
endif
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