CoffeeScript support for vim
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readme.md

This project adds CoffeeScript support to the vim editor. It handles syntax, indenting, and compiling.

Screenshot

Installing

  1. Install tpope's pathogen into ~/.vim/autoload/ and add this line to your vimrc:

     call pathogen#runtime_append_all_bundles()
    

    Be aware that it must be added before any filetype plugin indent on lines according to the install page:

    Note that you need to invoke the pathogen functions before invoking "filetype plugin indent on" if you want it to load ftdetect files. On Debian (and probably other distros), the system vimrc does this early on, so you actually need to "filetype off" before "filetype plugin indent on" to force reloading.

    To get the all the features of this plugin, be sure you do have a filetype plugin indent on line.

  1. Create, and change into, the ~/.vim/bundle/ directory:

     $ mkdir -p ~/.vim/bundle
     $ cd ~/.vim/bundle
    
  2. Make a clone of the vim-coffee-script repository:

     $ git clone git://github.com/kchmck/vim-coffee-script.git
     [...]
     $ ls
     vim-coffee-script/
    

That's it. Pathogen should handle the rest. Opening a file with a .coffee extension or a Cakefile will load the plugin.

Updating

  1. Change into the ~/.vim/bundle/vim-coffee-script/ directory:

     $ cd ~/.vim/bundle/vim-coffee-script
    
  2. Pull in the latest changes:

     $ git pull
    

Everything will then be brought up to date.

Compiling the Current File and Autocompiling

The CoffeeMake command compiles the current file and parses any errors.

CoffeeMake

CoffeeMake

CoffeeMake

By default, CoffeeMake shows all compiler output and jumps to the first line reported as an error by coffee:

:CoffeeMake

Compiler output can be hidden with silent:

:silent CoffeeMake

Line-jumping can be turned off by adding a bang:

:CoffeeMake!

Options given to CoffeeMake are passed along to coffee:

:CoffeeMake --bare

The command can be bound to a key like:

nmap KEY :CoffeeMake<CR>

Autocompiling

To get autocompiling when a file is written (formerly coffee_compile_on_save), add an autocmd like this to your vimrc:

autocmd BufWritePost *.coffee silent CoffeeMake!

All of the customizations above can be used, too. This one compiles silently with the -b option, but shows any errors:

autocmd BufWritePost *.coffee silent CoffeeMake! -b | cwindow | redraw!

The redraw! command is needed to fix a redrawing quirk in terminal vim, but can removed for gVim.

Default compiler options

The CoffeeMake command passes any options in the coffee_make_options variable along to the compiler. This can be used to set default options:

let coffee_make_options = "-n"

Compiling a CoffeeScript Snippet

The CoffeeCompile command shows how the current file or a snippet of CoffeeScript would be compiled to JavaScript. Calling CoffeeCompile without a range compiles the whole file:

CoffeeCompile

Compiled

Calling CoffeeCompile with a range, like in visual mode, compiles the selected snippet of CoffeeScript:

CoffeeCompile Snippet

Compiled Snippet

This scratch buffer can be quickly closed by hitting the q key.

Running some CoffeeScript

The CoffeeRun command compiles the current file or selected snippet and runs the resulting JavaScript. Output is shown at the bottom of the screen:

CoffeeRun

CoffeeRun Output

Customizing

These customizations can be enabled or disabled by adding the relevant let statement to your vimrc.

Fold by indentation

Folding is automatically setup as indent-based:

Folding

It's disabled by default, but can be enabled with:

let coffee_folding = 1

Otherwise, it can be quickly toggled per-file by hitting zi.

Disable trailing whitespace error

Trailing whitespace is highlighted as an error by default. This can be disabled with:

let coffee_no_trailing_space_error = 1

Disable trailing semicolon error

Trailing semicolons are also considered an error for help transitioning from JavaScript. This can be disabled with:

let coffee_no_trailing_semicolon_error = 1

Disable reserved words error

Reserved words like function and var are highlighted as an error in contexts disallowed by CoffeeScript. This can be disabled with:

let coffee_no_reserved_words_error = 1