vim-airline

Lean & mean statusline for vim that's light as air.

Rationale

There's already powerline, why yet another statusline?

it's 100% vimscript; no python needed.
it's small. i want the core plugin to be less than 200 lines as a rule (specifically adhering to the open/closed principle).
despite the small size, it is fully featured and already integrates with: vim-bufferline, fugitive, unite, ctrlp, minibufexpl, gundo, undotree, nerdtree, tagbar and syntastic.
it looks good with regular fonts, and provides configuration points so you can use unicode or powerline symbols.
it's fast to load, taking roughly 1ms. by comparison, powerline needs 60ms on the same machine.
it's fully customizable; if you know a little statusline syntax you can tweak it to your needs.
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!)

the old version still works well, but since it's deprecated new features won't get added
it uses different font codes, which makes it incompatible with other powerline bindings in the same terminal (e.g. bash, zsh, tmux, etc.)

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!

This plugin follows the standard runtime path structure, and as such it can be installed with a variety of plugin managers:

:help airline

the powerline font symbols are not showing up
enable them by adding let g:airline_powerline_fonts=1 to your vimrc.
the older deprecated vim-powerline uses different font codes compared to the newer powerline. you can grab prepatched fonts at powerline-fonts.
there is a pause when leaving insert mode
you need to set ttimeoutlen to a low number; 50 is recommended
you don't see any colors
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 on how to configure your terminal. pull requests for 8 and 16 color terminals are welcome.
you get the error Unknown function: fugitive#head
you are probably using version 1.2, which is very old...download v2 from the project page.
airline doesn't appear until i create a new split
add set laststatus=2 to your vimrc
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
the statusline wraps
you are probably using iTerm with double-width characters enabled. either disable this, or set ambiwidth=double in your vimrc.
how do i get rid of the default mode indicator?
add set noshowmode to your vimrc

If you encounter a bug, please do the following:

reproduce it with this minivimrc 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.

Contributions and pull requests are welcome. Please take note of the following guidelines:

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.

:help license