Move backup, swap, and undo dir logic into plugins

3 files changed, 169 insertions, 0 deletions

diff --git a/vim/plugin/auto_backupdir.vim b/vim/plugin/auto_backupdir.vim
new file mode 100644
index 00000000..f15e7ce6
--- /dev/null
+++ b/vim/plugin/auto_backupdir.vim
@@ -0,0 +1,56 @@
+"
+" 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 = $VIM_BACKUPDIR
+else
+
+  " This is imperfect in that it will break if you have a backslashed comma in
+  " the first component of your &runtimepath, but if you're doing that, you
+  " probably already have way bigger problems
+  let s:backupdir 
+      \ = strpart(&runtimepath, 0, stridx(&runtimepath, ','))
+      \ . '/backup'
+endif
+
+" If the prospective backup directory does not exist, try hard to create it
+if !isdirectory(expand(s:backupdir))
+
+  " Try Vim's native mkdir() first
+  if exists('*mkdir')
+    silent! call mkdir(expand(s:backupdir), 'p', 0700)
+
+  " Failing that, use an OS-dependent command
+  " (Fortunately, Unix and Windows are the only OS types in the world)
+  elseif has('unix')
+    silent! execute '!mkdir -m 0700 -p ' 
+          \ . shellescape(expand(s:backupdir))
+  elseif has('win32') || has('win64')
+    silent! execute '!mkdir ' 
+          \ . shellescape(expand(s:backupdir))
+  endif
+
+endif
+
+" If the directory exists after that...
+if isdirectory(expand(s:backupdir))
+
+  " Set the backup directory and turn backups on
+  execute 'set backupdir^=' . s:backupdir . '//'
+  set backup
+
+" If not, give up and raise an error
+else
+  echoerr 'Could not create backupdir ' . s:backupdir
+endif
diff --git a/vim/plugin/auto_swapdir.vim b/vim/plugin/auto_swapdir.vim
new file mode 100644
index 00000000..ea41a0f0
--- /dev/null
+++ b/vim/plugin/auto_swapdir.vim
@@ -0,0 +1,56 @@
+"
+" auto_swapdir.vim: Configure 'directory' automatically, including trying hard
+" to create it.
+"
+" Author: Tom Ryder <tom@sanctum.geek.nz>
+" License: Same as Vim itself
+"
+if exists('g:loaded_auto_swapdir')
+      \ || &compatible
+  finish
+endif
+let g:loaded_auto_swapdir = 1
+
+" Define the swap path we want
+if exists('$VIM_SWAPDIR')
+  let s:swapdir = $VIM_SWAPDIR
+else
+
+  " This is imperfect in that it will break if you have a backslashed comma in
+  " the first component of your &runtimepath, but if you're doing that, you
+  " probably already have way bigger problems
+  let s:swapdir 
+      \ = strpart(&runtimepath, 0, stridx(&runtimepath, ','))
+      \ . '/swap'
+endif
+
+" If the prospective swapfile directory does not exist, try hard to create it
+if !isdirectory(expand(s:swapdir))
+
+  " Try Vim's native mkdir() first
+  if exists('*mkdir')
+    silent! call mkdir(expand(s:swapdir), 'p', 0700)
+
+  " Failing that, use an OS-dependent command
+  " (Fortunately, Unix and Windows are the only OS types in the world)
+  elseif has('unix')
+    silent! execute '!mkdir -m 0700 -p ' 
+          \ . shellescape(expand(s:swapdir))
+  elseif has('win32') || has('win64')
+    silent! execute '!mkdir ' 
+          \ . shellescape(expand(s:swapdir))
+  endif
+
+endif
+
+" If the directory exists after that...
+if isdirectory(expand(s:swapdir))
+
+  " Set the swapfile directory and turn swapfiles on
+  execute 'set directory^=' . s:swapdir . '//'
+  set swapfile
+
+" If not, give up and raise an error
+else
+  echoerr 'Could not create swapdir ' . s:swapdir
+endif
diff --git a/vim/plugin/auto_undodir.vim b/vim/plugin/auto_undodir.vim
new file mode 100644
index 00000000..1d20ba95
--- /dev/null
+++ b/vim/plugin/auto_undodir.vim
@@ -0,0 +1,57 @@
+"
+" auto_undodir.vim: Configure 'undodir' automatically, including trying hard
+" to create it.
+"
+" Author: Tom Ryder <tom@sanctum.geek.nz>
+" License: Same as Vim itself
+"
+if exists('g:loaded_auto_undodir')
+      \ || !has('persistent_undo')
+      \ || &compatible
+  finish
+endif
+let g:loaded_auto_undodir = 1
+
+" Define the undo path we want
+if exists('$VIM_UNDODIR')
+  let s:undodir = $VIM_UNDODIR
+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:undodir 
+      \ = strpart(&runtimepath, 0, stridx(&runtimepath, ','))
+      \ . '/undo'
+endif
+
+" If the prospective undo directory does not exist, try hard to create it
+if !isdirectory(expand(s:undodir))
+
+  " Try Vim's native mkdir() first
+  if exists('*mkdir')
+    silent! call mkdir(expand(s:undodir), '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:undodir))
+  elseif has('win32') || has('win64')
+    silent! execute '!mkdir ' 
+          \ . shellescape(expand(s:undodir))
+  endif
+
+endif
+
+" If the directory exists after that...
+if isdirectory(expand(s:undodir))
+
+  " Set the undo directory and turn persistent undo files on
+  execute 'set undodir^=' . s:undodir . '//'
+  set undofile
+
+" If not, give up and raise an error
+else
+  echoerr 'Could not create undodir ' . s:undodir
+endif