Global variables override by buffer variables (#80)

[rockandska]

Hi,

Not a vim expert but seems to do the job requested by #80 and had personally the same needs.

It should allow users to be able to :

• enable/disable indent-guides at the buffer level
• tweak indent-guides at filetype / buffer level

For example, if you want :

• only tab indentation inside sh files
• only enable/show indent-guides for sh files

$ cat vimrc
let g:indent_guides_enable_on_vim_startup = 0
let g:indent_guides_tab_guides = 0
let g:indent_guides_space_guides = 1
let g:indent_guides_soft_pattern = ' '

$ cat after/ftplugin/sh.vim 
setlocal noexpandtab
setlocal softtabstop=0
setlocal shiftwidth=4
setlocal tabstop=4

let b:indent_guides_enable_on_vim_startup=1
let b:indent_guides_tab_guides = 1  
let b:indent_guides_space_guides = 0
let b:indent_guides_soft_pattern = '\t'

If you want enable indent-guides for all filetype / buffers except for sh filetype

$ cat vimrc
let g:indent_guides_enable_on_vim_startup = 1

$ cat after/ftplugin/sh.vim 
let b:indent_guides_enable_on_vim_startup=0

Comments / suggestions welcome

Edit: update example to reflect new commit

[alerque]

It looks like this covers some of the same ground as #68 (to address
#61) but covers other areas as well and with a different solution.

I'm fine with working with one or both of these PRs to get them mergable.
Buffer local overrides are a good thing in my book as long as global
defaults are honored first.

That being said this will need some merge conflict resolution or rebasing
now. Any chance you are still around to handle that?

[rockandska]

Will try to resolve merge conflicts soon

[rockandska]

Rebased and fix applied