.vimrc: add directories for backup/swap files

1 files changed, 37 insertions, 7 deletions

diff --git a/.vimrc b/.vimrc
index 23d5004..101e864 100644
--- a/.vimrc
+++ b/.vimrc
@@ -1,19 +1,49 @@
 source $VIMRUNTIME/vimrc_example.vim
 
+" Color scheme.
 color desert
-set expandtab
-set shiftwidth=4
+
+" 4 spaces per indentation level, no tabs.
 set softtabstop=4
+set shiftwidth=4
+set expandtab
+
 highlight ColorColumn ctermbg=darkgrey
 
+" In insert mode, press F2 to enter 'paste mode'.
+" Now you can paste text from elsewhere and _not_ mess up indentation.
+" Nice and easy, right?
+" Press F2 again to exit 'paste mode'.
 nnoremap <F2> :set invpaste paste?<CR>
 set pastetoggle=<F2>
 set showmode
 
+" Backup files are written to ~/.vimtmp/backup/.
+" I'm not sure how the whole thing's gonna work out in case of concurrent
+" writes to multiple files with the same name, since backup file names will
+" collide due to a long-standing Vim issue.
+" Vim treats `backupdir` option inconsistently: if its value ends with two
+" slashes, Vim doesn't convert the absolute path of the file being backed up
+" to its backup file name (replacing directory separators with % signs) as it
+" does with swap and 'persisent undo' files, but rather simply appends ~ to
+" the end of file's name.
+" For some reason it still works this way when there're two slashes at the
+" end, so I'm gonna stick with this, hoping that this problem gets fixed in
+" the future.
+set backupdir=~/.vimtmp/backup//
+set nobackup
+set writebackup
+
+" Swap files are written to ~/.vimrc/swap/.
+set directory=~/.vimtmp/swap//
+set swapfile
+
+" 'Persistent undo' files are written to ~/.vimrc/undo/.
+if has('persistent_undo')
+    set undodir=~/.vimtmp/undo//
+    set undofile
+endif
+
+" Enable current-directory .vimrc files.
 set exrc
 set secure
-
-set nobackup
-set noswapfile
-set noundofile
-set nowritebackup