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vim-gitgutter/README.mkd
2013-03-12 15:57:57 +01:00

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## Vim Git Gutter
A Vim plugin which shows a git diff in the 'gutter' (sign column). It shows whether each line has been added, modified, and where lines have been removed.
This is a port of the [Git Gutter][st2gg] plugin for Sublime Text 2.
### Screenshot
![screenshot](https://raw.github.com/airblade/vim-gitgutter/master/screenshot.png)
In the screenshot above you can see:
* Line 15 has been modified.
* Lines 21-24 are new.
* A line or lines were removed between lines 25 and 26.
### Installation
If you don't have a preferred installation method, I recommend installing [pathogen.vim][pathogen], and then simply copy and paste:
```
cd ~/.vim/bundle
git clone git://github.com/airblade/vim-gitgutter.git
```
Or for [Vundle](https://github.com/gmarik/vundle) users:
Add `Bundle 'airblade/vim-gitgutter'` to your `~/.vimrc` and then:
* either within Vim: `:BundleInstall`
* or in your shell: `vim +BundleInstall +qall`
### Usage
You don't have to do anything: it just works.
You can explicitly turn vim-gitgutter off and on (defaults to on):
* turn off with `:GitGutterDisable`
* turn on with `:GitGutterEnable`
* toggle with `:GitGutterToggle`.
And you can turn line highlighting on and off (defaults to off):
* turn on with `:GitGutterLineHighlightsEnable`
* turn off with `:GitGutterLineHighlightsDisable`
* toggle with `:GitGutterLineHighlightsToggle`.
Furthermore you can jump between hunks:
* jump to next hunk: `:GitGutterNextHunk`
* jump to previous hunk: `:GitGutterPrevHunk`.
You may want to add mappings for these if you use them often. For example:
```viml
nmap <silent> ]h :<C-U>execute v:count1 . "GitGutterNextHunk"<CR>
nmap <silent> [h :<C-U>execute v:count1 . "GitGutterPrevHunk"<CR>
```
See the customisation section below for how to change the defaults.
### Customisation
You can customise:
* The sign column's colours
* The signs' colours
* Line highlights
* Whether or not vim-gitgutter is on initially (defaults to on)
* Whether or not line highlighting is on initially (defaults to off)
Please note that vim-gitgutter won't override any colours or highlights you've set in your colorscheme.
#### Sign column
The background colour of the sign column is controlled by the `SignColumn` highlight group. This will be either set in your colorscheme or Vim's default.
To find out where it's set, and to what it's set, use `:verbose highlight SignColumn`.
If your `SignColumn` is not set (`:highlight SignColumn` gives you `SignColumn xxx cleared`), vim-gitgutter will set it to the same as your line number column (i.e. the `LineNr` highlight group).
To change your sign column's appearance, update your colorscheme or `~/.vimrc` like this:
* For the same appearance as your line number column: `highlight clear SignColumn`
* For a specific appearance on terminal Vim: `highlight SignColumn ctermbg=whatever`
* For a specific appearance on gVim/MacVim: `highlight SignColumn guibg=whatever`
#### Signs' colours
To customise these, set up the following highlight groups in your colorscheme or `~/.vimrc`:
```
GitGutterAdd " an added line
GitGutterChange " a changed line
GitGutterDelete " at least one removed line
GitGutterChangeDelete " a changed line followed by at least one removed line
```
You can either set these with `highlight GitGutterAdd {key}={arg}...` or link them to existing highlight groups with, say, `highlight link GitGutterAdd DiffAdd`.
#### Line highlights
Similarly to the signs' colours, set up the following highlight groups in your colorscheme or `~/.vimrc`:
```
GitGutterAddLine " default: links to DiffAdd
GitGutterChangeLine " default: links to DiffChange
GitGutterDeleteLine " default: links to DiffDelete
GitGutterChangeDeleteLine " default: links to GitGutterChangeLineDefault, i.e. DiffChange
```
#### To turn off vim-gitgutter by default
Add `let g:gitgutter_enabled = 0` to your `~/.vimrc`.
#### To turn on line highlighting by default
Add `let g:gitgutter_highlight_lines = 1` to your `~/.vimrc`.
### FAQ
> Why are the colours in the sign column weird?
Your colorscheme is configuring the `SignColumn` highlight group weirdly. Please see the section above on customising the sign column.
> Why is no sign shown if I delete the first line(s) in a file?
vim-gitgutter shows removed lines with a sign on the line above. In this case there isn't a line above so vim-gitgutter can't show the sign.
> What happens if I also use another plugin which uses signs (e.g. Syntastic)?
Vim only allows one sign per line. Before adding a sign to a line, vim-gitgutter checks whether a sign has already been added by somebody else. If so it doesn't do anything. In other words vim-gitgutter won't overwrite another plugin's signs. It also won't remove another plugin's signs.
### Alternatives
Related:
* [textobj-gitgutter][togg] (lets you treat diff hunks as text objects)
* [vim-gitgutter][mercurial] - Mercurial fork
Vim alternatives:
* [git-gutter-vim][ggv]
* [vim-git-inline-diff][vgid]
* [quickfixsigns_vim][qf] (a superset of this functionality)
* [iwilldiffer][iwd]
* [svndiff][svndiff]
* [sign-diff][signdiff]
* [changesPlugin][changes]
Other editors:
* [Git Gutter][st2gg] for Sublime Text 2
* [git-gutter.el][gge] for Emacs
Also, this may be of interest:
* [fugitive.vim][fugitive] is a full-on Git wrapper. It doesn't show git diffs in the gutter (ha!) but it does a bazillion other git things.
### Shameless Plug
If this plugin has helped you, or you'd like to learn more about Vim, why not check out these two screencasts I wrote for PeepCode:
* [Smash Into Vim I][siv1]
* [Smash Into Vim II][siv2]
You can read reviews at PeepCode and also on my [portfolio][].
### Intellectual Property
Copyright Andrew Stewart, AirBlade Software Ltd. Released under the MIT licence.
[st2gg]: https://github.com/jisaacks/GitGutter
[pathogen]: https://github.com/tpope/vim-pathogen
[qf]: https://github.com/tomtom/quickfixsigns_vim
[fugitive]: https://github.com/tpope/vim-fugitive
[siv1]: https://peepcode.com/products/smash-into-vim-i
[siv2]: https://peepcode.com/products/smash-into-vim-ii
[portfolio]: http://airbladesoftware.com/portfolio#vim
[vgid]: https://github.com/luxflux/vim-git-inline-diff
[gge]: https://github.com/syohex/emacs-git-gutter
[iwd]: https://bitbucket.org/sirpengi/iwilldiffer
[svndiff]: http://www.vim.org/scripts/script.php?script_id=1881
[signdiff]: http://www.vim.org/scripts/script.php?script_id=2712
[changes]: http://www.vim.org/scripts/script.php?script_id=3052
[ggv]: https://github.com/akiomik/git-gutter-vim
[togg]:https://github.com/gilligan/textobj-gitgutter
[mercurial]: https://github.com/safetydank/vim-gitgutter