Janus: Vim Distribution
This is a distribution of plug-ins and mappings for Vim, Gvim and MacVim.
It is designed to provide minimal working environment using the most popular plug-ins and the most common mappings.
The distribution is completely customisable using a
~/.vimrc.after Vim RC files.
UPGRADING FROM JANUARY 1st 2012 THROUGH JANUARY 10th
rake twice before running macvim; make sure
UPGRADING FROM BEFORE JANUARY 1st 2012
If you were using Janus before January 2012, note that Janus has gone
through a rewrite to make it more stable and customizable. Most notably,
you can now disable plugins using
janus#disable_plugin and customize
~/.vimrc.after. See the rest of this
README and the Customization wiki page.
To upgrade to the latest version:
- move customizations from
- Do the same with
- Run the installer:
curl -Lo- https://bit.ly/janus-bootstrap | bash
Updating to the latest version (from any time after January 10th, 2012)
To update to the latest version of the distribution, just run
NOTE: If you ever have an error updating Janus relating to a
missing commit in a submodule, please try running
rake again before
submitting an issue.
The mailing list is hosted at Google Groups, please join it for discussion and announcements.
The distribution is designed to work with Vim >= 7.3.
The distribution also requires
For the most comfortable experience, use the GUI version of Vim. Linux
users should install
gvim, OSX users should install
MacVim. The recommended way of
installing MacVim is using
Homebrew, but before installing
MacVim you need to use system-wide Python (If you are using python that
- If you’re using pythonbrew: do
$ brew install macvim
If you don’t use Homebrew, you can still download MacVim here.
Take a look at the Pre-requisites wiki page for more information.
To install Janus, please use our automatic installer , which backs up any Vim files found in your home folder and installs Janus.
$ curl -Lo- https://bit.ly/janus-bootstrap | bash
You can use
~/.vimrc.before for settings Janus itself uses,
such as the leader setting. You may also use
~/.vimrc.after for any additional settings; it is also a good place for
overriding Janus settings, as both files will be loaded at the end of
For example, to override the default color schemes:
$ echo 'color desert' >> ~/.vimrc.after $ echo 'color molokai' >> ~/.gvimrc.after
If you want to do additional customization or add more Vim plugins,
~/.janus directory and add your plugins there, either with a
git clone or by adding submodules to your own git repository there.
This directory is treated like a normal pathogen directory. For example:
$ cd ~/.janus $ git clone https://github.com/vim-scripts/Rename2.git rename2
Or, if you have a git repository in
~/.janus, you can use a submodule:
$ cd ~/.janus $ git submodule add https://github.com/vim-scripts/Rename2.git rename2
If you would like to disable an included plug-in, you can do that with
janus#disable_plugin() function from inside your
~/.vimrc.before. This function takes a plug-in name as an argument
without the group. For example, if you would like to disable the
NERDCommenter plug-in, you can do that with the command:
$ echo "call janus#disable_plugin('nerdcommenter')" >> ~/.vimrc.before
WARNING: We’ve noticed over and over, that people fork Janus just to customize it. This is bad practice for several reasons and you should not do that, and here’s why:
- Janus is fully customisable and there’s no need to change the core for using a different plugin fork or using a different mapping.
- Forking means maintenance; maintenance means burden. Do not burden
yourself with maintaining a fork; that’s what the
~/.janusfolder is for.
If you find yourself needing a customisation that is not possible with the current setup, then please open an issue or consider submitting a pull request to make it possible to continue using/improving the official repo.
WARNING: Any uncommited files inside the janus folder will be
removed the next time you run
rake so make sure to either put them in
the custom folder (
~/.janus), or commit them. We clean the janus
folder in case we replace a manually installed plugin (using rake tasks)
with a submodule.
For more information on how to customize Janus, you might want to take a look at the Customization wiki page.
Intro to VIM
Here’re some tips in case you’ve never used VIM before:
vimtutorinto a shell to go through a brief interactive tutorial inside VIM.
- Read the slides at VIM: Walking Without Crutches.
- Watch the screencasts at vimcasts.org
- Watch Derek Wyatt’s energetic tutorial videos at his site
- Read wycats’ perspective on learning Vim at Everyone who tried to convince me to use vim was wrong
- Read this and other answers to a question about vim at StackOverflow: Your problem with Vim is that you don’t grok vi
- VIM has two modes:
- insert mode- stuff you type is added to the buffer
- normal mode- keys you hit are interpreted as commands
- To enter insert mode, hit
- To exit insert mode, hit
:qto exit vim
- Certain commands are prefixed with a
<Leader>key, which maps to
\by default. You can, for example, use
let mapleader = ","to change this to a comma. If you want this to be in effect for uses of
<Leader>in the .vimrc file, make sure to define this in
- Keyboard cheat sheet.
This Vim distribution includes a number of packages built by others.
Janus ships with a number of basic customizations for vim:
- Line numbers
- Ruler (line and column numbers)
- No wrap (turn off per-buffer via :set wrap)
- Soft 2-space tabs, and default hard tabs to 2 spaces
- Show trailing whitespace as
- Make searching highlighted, incremental, and case insensitive unless a capital letter is used
- Always show a status line
- Allow backspacing over everything (indentations, eol, and start characters) in insert mode
<C-P>inserts the directory of the current file into a command
- Automatically resize splits when resizing the Vim window (GUI only)
:e (directory of current file)/(open in the current buffer)
:sp (directory of current file)/(open in a horizontal split)
:vsp (directory of current file)/(open in a vertical split)
:tabe (directory of current file)/(open in a new tab)
%!sudo tee > /dev/null %. Write to the current file using sudo (if you forgot to run it with sudo), it will prompt for sudo password when writing
<F4>toggles paste mode
<leader>fefformats the entire file
<leader>uconverts the entire word to uppercace
<leader>lconverts the entire word to lowercase
<leader>Uconverts the first char of a word to uppercase
<leader>Lconverts the first char of a word to lowercase
<leader>cdchanges the path to the active buffer’s file
<leader>mdcreates the directory of the active buffer’s file (For example, when editing a new file for which the path does not exist.)
gwswaps the current word with the following word
<leader>ulunderlines the current line with
<leader>fcfinds the next conflict marker (tested with Git conflicted files)
gk(Wrapped text is not considered a single long line of text.)
<leader>hstoggles highlight search
<leader>=adjusts viewports to the same size (
<D-[on MacVim) shifts current line or selected lines rightwards
<D-]on MacVim) shifts current line or selected lines leftwards
<C-W>!invokes kwbd plugin; it closes all open buffers in the open windows but keeps the windows open
Ack.vim uses ack to search inside the current directory for a pattern. You can learn more about it with :help Ack.
Customizations: Janus rebinds command-shift-f (
<D-F>) to bring up
Fuzzy file, buffer, mru and tag finder. Replaces Command-T
Customizations: For users of Command-T Janus maps CtrlP to command-t (
NERDCommenter allows you to wrangle your code comments, regardless of
:help NERDCommenter for all the details.
Customizations: Janus binds command-/ (
<D-/>) to toggle comments.
NERDTree is a file explorer plugin that provides “project drawer” functionality to your vim projects. You can learn more about it with :help NERDTree.
Customizations: Janus adds a number of customizations to the core NERDTree:
<Leader>nto toggle NERDTree
- Ignore compiled ruby, python, and java files
- When opening vim with vim /path, open the left NERDTree to that directory, set the vim pwd, and clear the right buffer
- In general, assume that there is a single NERDTree buffer on the left and one or more editing buffers on the right
In insert mode, start typing something and hit
<TAB> to tab-complete
based on the current context.
Syntastic is a syntax checking plugin that runs buffers through external syntax checkers as they are saved and opened. If syntax errors are detected, the user is notified and is happy because they didn’t have to compile their code or execute their script to find them.
Tagbar is a vim plugin for browsing the tags of source code files.
Customizations: Janus binds
<Leader>rt to toggle Tagbar.
EasyMotion provides a much simpler way to use some motions in vim. It
When one of the available motions is triggered, all visible text preceding or following the cursor is faded, and motion targets are highlighted.
EasyMotion is triggered by one of the provided mappings.
check EasyMotion’s home page for more information.
Narrowing means focussing on a region and making the rest inaccessible. You simply select the region, call :NarrowRegion and the selected part will open in a new scratch buffer. The rest of the file will be protected, so you won’t accidentally modify that buffer. In the new buffer, you can do a global replace, search or anything else to modify that part. When you are finished, simply write that buffer (e.g. by |:w|) and your modifications will be put in the original buffer making it accessible again.
Git Support (Fugitive)
Fugitive adds pervasive git support to git directories in vim. For more
:Gstatus to view
git status and type
- on any file to stage or
unstage it. Type
p on a file to enter
git add -p and stage specific
hunks in the file.
:Gdiff on an open file to see what changes have been made to that
When working with split windows, ZoomWin lets you zoom into a window and
out again using
Customizations: Janus binds
Buffergator is a plugin for listing, navigating between, and selecting
buffers to edit. Upon invocation (using the command,
BuffergatorToggle, or the provided key mapping,
catalog of listed buffers are displayed in a separate new window split
(vertical or horizontal, based on user options; default = vertical).
From this “buffer catalog”, a buffer can be selected and opened in an
existing window, a new window split (vertical or horizontal), or a new
Selected buffers can be “previewed”, i.e. opened in a window or tab
page, but with focus remaining in the buffer catalog. Even better, you
can “walk” up and down the list of buffers shown in the catalog by using
<C-SPACE>). These keys select the
next/previous buffer in succession, respectively, opening it for preview
without leaving the buffer catalog viewer.
VRoom is a plugin inspired by Gary Bernhardt’s vim config for running your ruby tests/specs/features.
Imagine you’re hacking on a Rails controller, when you switch to the
test or specs for the controller, you can use
<leader>r to run all the
<leader>R to run the closest spec, then you can jump back to
the controller hack on it and use
<leader>r to run the last spec you
ran last time, so you don’t need to open the test again.
Then benefits of this plugin are to centralize your workflow in one
window, one software to do it all, which is a huge speedup over using
tmux or multiple terminal tabs.
Janus ships with a few additional syntaxes:
- Markdown (bound to *.markdown, *.md, and *.mk)
- Mustache (bound to *.mustache)
- Haml (bound to *.haml)
- Sass (bound to *.sass)
- SCSS (bound to *.scss)
nodejsin the shebang.
- Map Gemfile, Rakefile, Vagrantfile, Procfile, Thorfile, config.ru and *.rake to Ruby.
- Git commits (set your
mvim -fon OSX)
$ echo "export EDITOR='vim -f'" >> ~/.bashrc, you can also use Git global config to set this if you have EDITOR set to something else
$ git config --global core.editor 'vim -f'
If you’re looking for the old janus distribution controlled by a Rakefile then please head over to the rakefile branch but please note that the rakefile branch will not be maintained.
This code is free to use under the terms of the MIT license.
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the “Software”), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.