vim-ls : LiveScript support for Vim
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| description |
LiveScript is a language which compiles to JavaScript. It has a straightforward mapping to JavaScript and allows you to write expressive code devoid of repetitive boilerplate. While LiveScript adds many features to assist in functional style programming, it also has many improvements for object oriented and imperative programming.
LiveScript is a fork of Coco and an indirect descendant of CoffeeScript, with which it has much compatibility. |
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| install details |
### LiveScript
For more information about LiveScript see [gkz.github.com/LiveScript](http://gkz.github.com/LiveScript/).
### Installing and Using
1. Install [tpope's][tpope] [pathogen] into `~/.vim/autoload/` and add the
following line to your `~/.vimrc`:
call pathogen#infect()
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.
[pathogen]: http://www.vim.org/scripts/script.php?script_id=2332
[tpope]: http://github.com/tpope/vim-pathogen
2. Create, and change into, the `~/.vim/bundle/` directory:
$ mkdir -p ~/.vim/bundle
$ cd ~/.vim/bundle
3. Make a clone of the `vim-ls` repository:
$ git clone git://github.com/gkz/vim-ls.git
[...]
$ ls
vim-ls/
That's it. Pathogen should handle the rest. Opening a file with a `.ls`
extension or a `Slakefile` will load everything.
### Updating
1. Change into the `~/.vim/bundle/vim-ls/` directory:
$ cd ~/.vim/bundle/vim-ls
2. Pull in the latest changes:
$ git pull
Everything will then be brought up to date.
### LiveScriptMake: Compile the Current File
The `LiveScriptMake` command compiles the current file and parses any errors.
The full signature of the command is:
:[silent] LiveScriptMake[!] [ls-OPTIONS]...
By default, `LiveScriptMake` shows all compiler output and jumps to the first line
reported as an error by `livescript`:
:LiveScriptMake
Compiler output can be hidden with `silent`:
:silent LiveScriptMake
Line-jumping can be turned off by adding a bang:
:LiveScriptMake!
Options given to `LiveScriptMake` are passed along to `livescript`:
:LiveScriptMake --bare
`LiveScriptMake` can be manually loaded for a file with:
:compiler ls
#### Recompile on write
To recompile a file when it's written, add an `autocmd` like this to your
`vimrc`:
au BufWritePost *.ls silent LiveScriptMake!
All of the customizations above can be used, too. This one compiles silently
and with the `-b` option, but shows any errors:
au BufWritePost *.ls silent LiveScriptMake! -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 `LiveScriptMake` command passes any options in the `livescript_make_options`
variable along to the compiler. You can use this to set default options:
let livescript_make_options = '--bare'
#### Path to compiler
To change the compiler used by `LiveScriptMake` and `LiveScriptCompile`, set
`livescript_compiler` to the full path of an executable or the filename of one
in your `$PATH`:
let livescript_compiler = '/usr/bin/livescript'
This option is set to `livescript` by default.
### LiveScriptCompile: Compile Snippets of LiveScript
The `LiveScriptCompile` command shows how the current file or a snippet of
LiveScript is compiled to JavaScript. The full signature of the command is:
:[RANGE] LiveScriptCompile [watch|unwatch] [vert[ical]] [WINDOW-SIZE]
Calling `LiveScriptCompile` without a range compiles the whole file.
Calling `LiveScriptCompile` with a range, like in visual mode, compiles the selected
snippet of LiveScript.
The scratch buffer can be quickly closed by hitting the `q` key.
Using `vert` splits the LiveScriptCompile buffer vertically instead of horizontally:
:LiveScriptCompile vert
Set the `ls_compile_vert` variable to split the buffer vertically by
default:
let ls_compile_vert = 1
The initial size of the LiveScriptCompile buffer can be given as a number:
:LiveScriptCompile 4
#### Watch (live preview) mode
Writing some code and then exiting insert mode automatically updates the
compiled JavaScript buffer.
Use `watch` to start watching a buffer (`vert` is also recommended):
:LiveScriptCompile watch vert
After making some changes in insert mode, hit escape and your code will
be recompiled. Changes made outside of insert mode don't trigger this recompile,
but calling `LiveScriptCompile` will compile these changes without any bad effects.
To get synchronized scrolling of a LiveScript and LiveScriptCompile buffer, set
`scrollbind` on each:
:setl scrollbind
Use `unwatch` to stop watching a buffer:
:LiveScriptCompile unwatch
### Configure Syntax Highlighting
Add these lines to your `vimrc` to disable the relevant syntax group.
#### Disable trailing whitespace error
Trailing whitespace is highlighted as an error by default. This can be disabled
with:
hi link lsSpaceError NONE
#### Disable reserved words error
Reserved words like `function` and `var` are highlighted as an error where
they're not allowed in LiveScript. This can be disabled with:
hi link lsReservedError NONE
### Tune Vim for LiveScript
Changing these core settings can make vim more LiveScript friendly.
#### Fold by indentation
Folding by indentation works well for LiveScript functions and classes.
To fold by indentation in LiveScript files, add this line to your `vimrc`:
au BufNewFile,BufReadPost *.ls setl foldmethod=indent nofoldenable
With this, folding is disabled by default but can be quickly toggled per-file
by hitting `zi`. To enable folding by default, remove `nofoldenable`:
au BufNewFile,BufReadPost *.ls setl foldmethod=indent
#### Two-space indentation
To get standard two-space indentation in LiveScript files, add this line to
your `vimrc`:
au BufNewFile,BufReadPost *.ls setl shiftwidth=2 expandtab |
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