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Programming language: Vim script
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README

Filetype Support for Crystal

Build Status

This is filetype support for Crystal programming language.

  • crystal filetype detection
  • Syntax highlight
  • Indentation
  • vim-matchit support
  • crystal tool integration (implementations, context, formatter, and so on)
  • crystal spec integration
  • Syntax check (Using Syntastic)
  • Completion (currently for variable names)

Installation

Please copy autoload, ftdetect, ftplugin, indent, plugin and syntax directories into your ~/.vim (or ~/vimfiles in Windows) directory.

$ cp -R autoload ftdetect ftplugin indent plugin syntax ~/.vim/

$ # If you use vim-syntastic
$ cp -R syntax_checkers ~/.vim/

If you use Vim8, :packadd is available to install. Please see :help packages for more detail.

Otherwise, please use your favorite plugin manager like vim-plug.

Syntax Highlight

screenshot

This plugin was firstly imported from Ruby's filetype plugin. There are many differences between Ruby and Crystal but vim-crystal can't support all of them yet. In addition, Crystal is growing rapidly and being added many changes. If you've found some issues or points to improve, pull requests and issues are welcome.

Spec Integration

screen shot: run spec

Running spec(s) and show the result in Vim. The output is colorful if possible as executed in CLI.

:CrystalSpecSwitch (mapping to gss)

It switches current source file and its spec file. This command assumes the standard directory layout which crystal init generates.

If you don't set g:crystal_define_mappings to 0, you can use this feature with mapping gss.

:CrystalSpecRunAll (mapping to gsa)

It runs the all specs for current file's project.

If you don't set g:crystal_define_mappings to 0, you can use this feature with mapping gsa.

:CrystalSpecRunCurrent (mapping to gsc)

It runs spec for current buffer.

  1. When current buffer is a spec source, :CrystalSpecRunCurrent runs the spec under the cursor. You should execute this command after moving cursor to it ... do line or describe ... do line.
  2. When current buffer is not a spec source, :CrystalSpecRunCurrent finds corresponding spec source and runs all specs in the source.

If you don't set g:crystal_define_mappings to 0, you can use this feature with mapping gsc.

Formatter Integration

format screenshot

You can run formatter manually by :CrystalFormat or automatically at saving buffer.

When you set g:crystal_auto_format to 1, current buffer is automatically formatted on BufWritePre. The variable is set to 0 by default because crystal tool format currently seems buggy.

Tool Integration

:CrystalDef (mapping to gd)

It makes cursor jump to the definition of name under the cursor. This command uses crystal tool implementations.

screenshort

If you don't set g:crystal_define_mappings to 0, you can use this feature with mapping gd.

:CrystalContext (mapping to gc)

It shows the context under the cursor. Context includes variable names and their types.

screenshot

If you don't set g:crystal_define_mappings to 0, you can use this feature with mapping gc.

:CrystalHierarchy

It shows types hierarchy of current code.

screenshot

:CrystalImpl

It shows how the identifier under the cursor is implemented. For example, when the cursor is on some property of an object instance, :CrystalImpl would report where the property is defined with property macro.

:CrystalExpand

It expands macro invocation under the cursor.

Completion

Omni completion for crystal can be used by <C-x><C-o>. (Please see :help ins-completion)

screenshot

Currently you can complete variable names.

License

This plugin is distributed under the MIT License.

Copyright (c) 2014 rhysd

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.


*Note that all licence references and agreements mentioned in the vim-crystal README section above are relevant to that project's source code only.