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# vim-airline
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Lean & mean statusline for vim that's light as air.
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# Rationale
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There's already [powerline][b], why yet another statusline?
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* it's 100% vimscript; no python needed.
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* it's small. i want the core plugin to be *less than 200 lines* as a rule (specifically adhering to the [open/closed principle][h]).
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* despite the small size, it is fully featured and already integrates with: [vim-bufferline][f], [fugitive][d], [unite][i], [ctrlp][j], [minibufexpl][o], [gundo][p], [undotree][q], [nerdtree][r], [tagbar][s] and [syntastic][e].
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* it looks good with regular fonts, and provides configuration points so you can use unicode or powerline symbols.
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* it's fast to load, taking roughly 1ms. by comparison, powerline needs 60ms on the same machine.
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* it's fully customizable; if you know a little `statusline` syntax you can tweak it to your needs.
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* it's trivial to write colorschemes; for a minimal theme you need to edit 9 lines of colors. (please send pull requests if you create new themes!)
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What about [old powerline][a]?
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* the old version still works well, but since it's deprecated new features won't get added
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* it uses different font codes, which makes it incompatible with other powerline bindings in the same terminal (e.g. bash, zsh, tmux, etc.)
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# Why's it called airline?
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I wrote the initial version on an airplane, and since it's light as air it turned out to be a good name. Thanks for flying vim!
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# Installation
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This plugin follows the standard runtime path structure, and as such it can be installed with a variety of plugin managers:
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* [pathogen][k]
* `git clone https://github.com/bling/vim-airline ~/.vim/bundle/vim-airline`
* [neobundle][l]
* `NeoBundle 'bling/vim-airline'`
* [vundle][m]
* `Bundle 'bling/vim-airline'`
* manual
* copy all of the files into your `~/.vim` directory
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# Configuration
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`:help airline`
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# Integrating with powerline fonts
For the nice looking powerline symbols to appear, you will need to install a patched font. Instructions can be found in the official powerline [documentation][t]. Prepatched fonts can be found in the [powerine-fonts][c] repository.
Finally, enable them in vim-airline by adding `let g:airline_powerline_fonts = 1` to your vimrc.
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# FAQ/Troubleshooting
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* the powerline font symbols are not showing up
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* the older deprecated [vim-powerline][a] uses different font codes; ensure you are using v2 fonts.
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* there is a pause when leaving insert mode
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* you need to set `ttimeoutlen` to a low number; 50 is recommended
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* you don't see any colors
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* all of the themes use a 256 terminal color palette. it's likely that the value of `t_Co` is misconfigured. please see this [article][n] on how to configure your terminal. pull requests for 8 and 16 color terminals are welcome.
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* you get the error `Unknown function: fugitive#head`
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* you are probably using version 1.2, which is very old...download v2 from the [project page][d].
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* airline doesn't appear until i create a new split
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* add `set laststatus=2` to your vimrc
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* bufferline is printing to the statusline as well as the command bar
* you can disable automatic echoing by adding `let g:bufferline_echo = 0` to your vimrc
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* the statusline wraps
* you are probably using iTerm with double-width characters enabled. either disable this, or `set ambiwidth=double` in your vimrc.
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* how do i get rid of the default mode indicator?
* add `set noshowmode` to your vimrc
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# Bugs
If you encounter a bug, please do the following:
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* reproduce it with this [minivimrc][g] repository to rule out any configuration conflicts.
* specify your version and patch level, as well as operating system (found with `:version` ).
* a link to a gist or your vimrc where it can be reproduced.
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# Screenshots
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### dark theme with a regular font
### dark theme with powerline symbols
### simple theme
### light theme
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### badwolf theme with [bufferline][f] integration
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# Contributions
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Contributions and pull requests are welcome. Please take note of the following guidelines:
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* adhere to the existing style as much as possible; notably, 2 space indents and long-form keywords.
* keep the history clean! squash your branches before you submit a pull request. `pull --rebase` is your friend.
* this plugin got a lot more popular than i initially expected, if you make changes to the core, please test on as many versions of vim as possible.
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# License
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`:help license`
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[a]: https://github.com/Lokaltog/vim-powerline
[b]: https://github.com/Lokaltog/powerline
[c]: https://github.com/Lokaltog/powerline-fonts
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[d]: https://github.com/tpope/vim-fugitive
[e]: https://github.com/scrooloose/syntastic
[f]: https://github.com/bling/vim-bufferline
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[g]: https://github.com/bling/minivimrc
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[h]: http://en.wikipedia.org/wiki/Open/closed_principle
[i]: https://github.com/Shougo/unite.vim
[j]: https://github.com/kien/ctrlp.vim
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[k]: https://github.com/tpope/vim-pathogen
[l]: https://github.com/Shougo/neobundle.vim
[m]: https://github.com/gmarik/vundle
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[n]: http://vim.wikia.com/wiki/256_colors_in_vim
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[o]: https://github.com/techlivezheng/vim-plugin-minibufexpl
[p]: https://github.com/sjl/gundo.vim
[q]: https://github.com/mbbill/undotree
[r]: https://github.com/scrooloose/nerdtree
[s]: https://github.com/majutsushi/tagbar
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[t]: https://powerline.readthedocs.org/en/latest/fontpatching.html
