mirror of https://github.com/dense-analysis/ale
868 lines
30 KiB
Markdown
868 lines
30 KiB
Markdown
# Asynchronous Lint Engine
|
|
|
|
[](https://www.vim.org/) [](https://neovim.io/) [](https://github.com/dense-analysis/ale/actions?query=event%3Apush+workflow%3ACI+branch%3Amaster++) [](https://ci.appveyor.com/project/dense-analysis/ale) [](https://discord.gg/5zFD6pQxDk)
|
|
|
|
|
|
|
|
ALE (Asynchronous Lint Engine) is a plugin providing linting (syntax checking
|
|
and semantic errors) in NeoVim 0.6.0+ and Vim 8.0+ while you edit your text files,
|
|
and acts as a Vim [Language Server Protocol](https://langserver.org/) client.
|
|
|
|
<video autoplay="true" muted="true" loop="true" controls="false" src="https://user-images.githubusercontent.com/3518142/210141215-8f2ff760-6a87-4704-a11e-c109b8e9ec41.mp4" title="An example showing what ALE can do."></video>
|
|
|
|
ALE makes use of NeoVim and Vim 8 job control functions and timers to
|
|
run linters on the contents of text buffers and return errors as
|
|
text is changed in Vim. This allows for displaying warnings and
|
|
errors in files being edited in Vim before files have been saved
|
|
back to a filesystem.
|
|
|
|
In other words, this plugin allows you to lint while you type.
|
|
|
|
ALE offers support for fixing code with command line tools in a non-blocking
|
|
manner with the `:ALEFix` feature, supporting tools in many languages, like
|
|
`prettier`, `eslint`, `autopep8`, and more.
|
|
|
|
ALE acts as a "language client" to support a variety of Language Server Protocol
|
|
features, including:
|
|
|
|
* Diagnostics (via Language Server Protocol linters)
|
|
* Go To Definition (`:ALEGoToDefinition`)
|
|
* Completion (Built in completion support, or with Deoplete)
|
|
* Finding references (`:ALEFindReferences`)
|
|
* Hover information (`:ALEHover`)
|
|
* Symbol search (`:ALESymbolSearch`)
|
|
|
|
If you don't care about Language Server Protocol, ALE won't load any of the code
|
|
for working with it unless needed. One of ALE's general missions is that you
|
|
won't pay for the features that you don't use.
|
|
|
|
**Help Wanted:** If you would like to help maintain this plugin by managing the
|
|
many issues and pull requests that are submitted, please send the author an
|
|
email at [dev@w0rp.com](mailto:dev@w0rp.com?subject=Helping%20with%20ALE).
|
|
|
|
If you enjoy this plugin, feel free to contribute or check out the author's
|
|
other content at [w0rp.com](https://w0rp.com).
|
|
|
|
## Why ALE?
|
|
|
|
ALE has been around for many years, and there are many ways to run asynchronous
|
|
linting and fixing of code in Vim. ALE offers the following.
|
|
|
|
* No dependencies for ALE itself
|
|
* Lightweight plugin architecture (No JavaScript or Python required)
|
|
* Low memory footprint
|
|
* Runs virtually everywhere, including remote shells, and in `git commit`
|
|
* Out of the box support for running particular linters and language servers
|
|
* Near-zero configuration with custom code for better defaults
|
|
* Highly customizable and well-documented (`:help ale-options`)
|
|
* Breaking changes for the plugin are extremely rare
|
|
* Support for older Vim and Neovim versions
|
|
* Windows support
|
|
* Well-integrated with other plugins
|
|
|
|
## Supported Languages and Tools
|
|
|
|
ALE supports a wide variety of languages and tools. See the
|
|
[full list](supported-tools.md) in the
|
|
[Supported Languages and Tools](supported-tools.md) page.
|
|
|
|
## Usage
|
|
|
|
<a name="usage-linting"></a>
|
|
|
|
### Linting
|
|
|
|
Once this plugin is installed, while editing your files in supported
|
|
languages and tools which have been correctly installed,
|
|
this plugin will send the contents of your text buffers to a variety of
|
|
programs for checking the syntax and semantics of your programs. By default,
|
|
linters will be re-run in the background to check your syntax when you open
|
|
new buffers or as you make edits to your files.
|
|
|
|
The behavior of linting can be configured with a variety of options,
|
|
documented in [the Vim help file](doc/ale.txt). For more information on the
|
|
options ALE offers, consult `:help ale-options` for global options and `:help
|
|
ale-integration-options` for options specified to particular linters.
|
|
|
|
<a name="usage-fixing"></a>
|
|
|
|
### Fixing
|
|
|
|
ALE can fix files with the `ALEFix` command. Functions need to be configured
|
|
either in each buffer with a `b:ale_fixers`, or globally with `g:ale_fixers`.
|
|
|
|
The recommended way to configure fixers is to define a List in an ftplugin file.
|
|
|
|
```vim
|
|
" In ~/.vim/ftplugin/javascript.vim, or somewhere similar.
|
|
|
|
" Fix files with prettier, and then ESLint.
|
|
let b:ale_fixers = ['prettier', 'eslint']
|
|
" Equivalent to the above.
|
|
let b:ale_fixers = {'javascript': ['prettier', 'eslint']}
|
|
```
|
|
|
|
You can also configure your fixers from vimrc using `g:ale_fixers`, before or
|
|
after ALE has been loaded.
|
|
|
|
A `*` in place of the filetype will apply a List of fixers to all files which
|
|
do not match some filetype in the Dictionary.
|
|
|
|
Note that using a plain List for `g:ale_fixers` is not supported.
|
|
|
|
```vim
|
|
" In ~/.vim/vimrc, or somewhere similar.
|
|
let g:ale_fixers = {
|
|
\ '*': ['remove_trailing_lines', 'trim_whitespace'],
|
|
\ 'javascript': ['eslint'],
|
|
\}
|
|
```
|
|
|
|
If you want to automatically fix files when you save them, you need to turn
|
|
a setting on in vimrc.
|
|
|
|
```vim
|
|
" Set this variable to 1 to fix files when you save them.
|
|
let g:ale_fix_on_save = 1
|
|
```
|
|
|
|
The `:ALEFixSuggest` command will suggest some supported tools for fixing code.
|
|
Both `g:ale_fixers` and `b:ale_fixers` can also accept functions, including
|
|
lambda functions, as fixers, for fixing files with custom tools.
|
|
|
|
See `:help ale-fix` for complete information on how to fix files with ALE.
|
|
|
|
<a name="usage-completion"></a>
|
|
|
|
### Completion
|
|
|
|
ALE offers some support for completion via hijacking of omnicompletion while you
|
|
type. All of ALE's completion information must come from Language Server
|
|
Protocol linters, or from `tsserver` for TypeScript.
|
|
|
|
ALE integrates with [Deoplete](https://github.com/Shougo/deoplete.nvim) as a
|
|
completion source, named `'ale'`. You can configure Deoplete to only use ALE as
|
|
the source of completion information, or mix it with other sources.
|
|
|
|
```vim
|
|
" Use ALE and also some plugin 'foobar' as completion sources for all code.
|
|
call deoplete#custom#option('sources', {
|
|
\ '_': ['ale', 'foobar'],
|
|
\})
|
|
```
|
|
|
|
ALE also offers its own automatic completion support, which does not require any
|
|
other plugins, and can be enabled by changing a setting before ALE is loaded.
|
|
|
|
```vim
|
|
" Enable completion where available.
|
|
" This setting must be set before ALE is loaded.
|
|
"
|
|
" You should not turn this setting on if you wish to use ALE as a completion
|
|
" source for other completion plugins, like Deoplete.
|
|
let g:ale_completion_enabled = 1
|
|
```
|
|
|
|
ALE provides an omni-completion function you can use for triggering
|
|
completion manually with `<C-x><C-o>`.
|
|
|
|
```vim
|
|
set omnifunc=ale#completion#OmniFunc
|
|
```
|
|
|
|
ALE supports automatic imports from external modules. This behavior is enabled
|
|
by default and can be disabled by setting:
|
|
|
|
```vim
|
|
let g:ale_completion_autoimport = 0
|
|
```
|
|
|
|
Note that disabling auto import can result in missing completion items from some
|
|
LSP servers (e.g. eclipselsp). See `:help ale-completion` for more information.
|
|
|
|
<a name="usage-go-to-definition"></a>
|
|
|
|
### Go To Definition
|
|
|
|
ALE supports jumping to the definition of words under your cursor with the
|
|
`:ALEGoToDefinition` command using any enabled Language Server Protocol linters
|
|
and `tsserver`.
|
|
|
|
See `:help ale-go-to-definition` for more information.
|
|
|
|
<a name="usage-find-references"></a>
|
|
|
|
### Find References
|
|
|
|
ALE supports finding references for words under your cursor with the
|
|
`:ALEFindReferences` command using any enabled Language Server Protocol linters
|
|
and `tsserver`.
|
|
|
|
See `:help ale-find-references` for more information.
|
|
|
|
<a name="usage-hover"></a>
|
|
|
|
### Hovering
|
|
|
|
ALE supports "hover" information for printing brief information about symbols at
|
|
the cursor taken from Language Server Protocol linters and `tsserver` with the
|
|
`ALEHover` command.
|
|
|
|
Truncated information will be displayed when the cursor rests on a symbol by
|
|
default, as long as there are no problems on the same line.
|
|
|
|
The information can be displayed in a `balloon` tooltip in Vim or GVim by
|
|
hovering your mouse over symbols. Mouse hovering is enabled by default in GVim,
|
|
and needs to be configured for Vim 8.1+ in terminals.
|
|
|
|
See `:help ale-hover` for more information.
|
|
|
|
<a name="usage-symbol-search"></a>
|
|
|
|
### Symbol Search
|
|
|
|
ALE supports searching for workspace symbols via Language Server Protocol
|
|
linters with the `ALESymbolSearch` command.
|
|
|
|
Search queries can be performed to find functions, types, and more which are
|
|
similar to a given query string.
|
|
|
|
See `:help ale-symbol-search` for more information.
|
|
|
|
<a name="usage-refactoring"></a>
|
|
|
|
### Refactoring: Rename, Actions
|
|
|
|
ALE supports renaming symbols in symbols in code such as variables or class
|
|
names with the `ALERename` command.
|
|
|
|
`ALEFileRename` will rename file and fix import paths (tsserver
|
|
only).
|
|
|
|
`ALECodeAction` will execute actions on the cursor or applied to a visual
|
|
range selection, such as automatically fixing errors.
|
|
|
|
See `:help ale-refactor` for more information.
|
|
|
|
## Installation
|
|
|
|
Add ALE to your runtime path in the usual ways.
|
|
|
|
If you have trouble reading `:help ale`, try the following.
|
|
|
|
```vim
|
|
packloadall | silent! helptags ALL
|
|
```
|
|
|
|
#### Vim `packload`:
|
|
|
|
```bash
|
|
mkdir -p ~/.vim/pack/git-plugins/start
|
|
git clone --depth 1 https://github.com/dense-analysis/ale.git ~/.vim/pack/git-plugins/start/ale
|
|
```
|
|
|
|
#### Neovim `packload`:
|
|
|
|
```bash
|
|
mkdir -p ~/.local/share/nvim/site/pack/git-plugins/start
|
|
git clone --depth 1 https://github.com/dense-analysis/ale.git ~/.local/share/nvim/site/pack/git-plugins/start/ale
|
|
```
|
|
|
|
#### Windows `packload`:
|
|
|
|
```bash
|
|
# Run these commands in the "Git for Windows" Bash terminal
|
|
mkdir -p ~/vimfiles/pack/git-plugins/start
|
|
git clone --depth 1 https://github.com/dense-analysis/ale.git ~/vimfiles/pack/git-plugins/start/ale
|
|
```
|
|
|
|
#### [vim-plug](https://github.com/junegunn/vim-plug)
|
|
|
|
```vim
|
|
Plug 'dense-analysis/ale'
|
|
```
|
|
|
|
#### [Vundle](https://github.com/VundleVim/Vundle.vim)
|
|
|
|
```vim
|
|
Plugin 'dense-analysis/ale'
|
|
```
|
|
|
|
#### [Pathogen](https://github.com/tpope/vim-pathogen)
|
|
```vim
|
|
git clone https://github.com/dense-analysis/ale ~/.vim/bundle/ale
|
|
```
|
|
|
|
## Contributing
|
|
|
|
If you would like to see support for more languages and tools, please
|
|
[create an issue](https://github.com/dense-analysis/ale/issues)
|
|
or [create a pull request](https://github.com/dense-analysis/ale/pulls).
|
|
If your tool can read from stdin or you have code to suggest which is good,
|
|
support can be happily added for it.
|
|
|
|
If you are interested in the general direction of the project, check out the
|
|
[wiki home page](https://github.com/dense-analysis/ale/wiki). The wiki includes
|
|
a Roadmap for the future, and more.
|
|
|
|
If you'd liked to discuss ALE and more check out the Dense Analysis Discord
|
|
server here: https://discord.gg/5zFD6pQxDk
|
|
|
|
## FAQ
|
|
|
|
<a name="faq-disable-linters"></a>
|
|
|
|
### How do I disable particular linters?
|
|
|
|
By default, all available tools for all supported languages will be run. If you
|
|
want to only select a subset of the tools, you can define `b:ale_linters` for a
|
|
single buffer, or `g:ale_linters` globally.
|
|
|
|
The recommended way to configure linters is to define a List in an ftplugin
|
|
file.
|
|
|
|
```vim
|
|
" In ~/.vim/ftplugin/javascript.vim, or somewhere similar.
|
|
|
|
" Enable ESLint only for JavaScript.
|
|
let b:ale_linters = ['eslint']
|
|
|
|
" Equivalent to the above.
|
|
let b:ale_linters = {'javascript': ['eslint']}
|
|
```
|
|
|
|
You can also declare which linters you want to run in your vimrc file, before or
|
|
after ALE has been loaded.
|
|
|
|
```vim
|
|
" In ~/.vim/vimrc, or somewhere similar.
|
|
let g:ale_linters = {
|
|
\ 'javascript': ['eslint'],
|
|
\}
|
|
```
|
|
|
|
For all languages unspecified in the dictionary, all possible linters will
|
|
be run for those languages, just as when the dictionary is not defined.
|
|
Running many linters should not typically obstruct editing in Vim,
|
|
as they will all be executed in separate processes simultaneously.
|
|
|
|
If you don't want ALE to run anything other than what you've explicitly asked
|
|
for, you can set `g:ale_linters_explicit` to `1`.
|
|
|
|
```vim
|
|
" Only run linters named in ale_linters settings.
|
|
let g:ale_linters_explicit = 1
|
|
```
|
|
|
|
This plugin will look for linters in the [`ale_linters`](ale_linters) directory.
|
|
Each directory within corresponds to a particular filetype in Vim, and each file
|
|
in each directory corresponds to the name of a particular linter.
|
|
|
|
### How do I disable a particular warning or error?
|
|
|
|
Warnings and errors should be configured in project configuration files for the
|
|
relevant tools. ALE supports disabling only warnings relating to trailing
|
|
whitespace, which Vim users often fix automatically.
|
|
|
|
```vim
|
|
" Disable whitespace warnings
|
|
let g:ale_warn_about_trailing_whitespace = 0
|
|
```
|
|
|
|
Users generally should not ignore warnings or errors in projects by changing
|
|
settings in their own editor. Instead, configure tools appropriately so any
|
|
other user of the same project will see the same problems.
|
|
|
|
<a name="faq-get-info"></a>
|
|
|
|
### How can I see what ALE has configured for the current file?
|
|
|
|
Run the following to see what is currently configured:
|
|
|
|
```vim
|
|
:ALEInfo
|
|
```
|
|
|
|
### How can I disable virtual text appearing at ends of lines?
|
|
|
|
By default, ALE displays errors and warnings with virtual text. The problems ALE
|
|
shows appear with comment-like syntax after every problem found. You can set ALE
|
|
to only show problems where the cursor currently lies like so.
|
|
|
|
```vim
|
|
let g:ale_virtualtext_cursor = 'current'
|
|
```
|
|
|
|
If you want to disable virtual text completely, apply the following.
|
|
|
|
```vim
|
|
let g:ale_virtualtext_cursor = 'disabled'
|
|
```
|
|
|
|
<a name="faq-keep-signs"></a>
|
|
<a name="faq-change-signs"></a>
|
|
|
|
### How can I customise signs?
|
|
|
|
Use these options to specify what text should be used for signs:
|
|
|
|
```vim
|
|
let g:ale_sign_error = '>>'
|
|
let g:ale_sign_warning = '--'
|
|
```
|
|
|
|
ALE sets some background colors automatically for warnings and errors
|
|
in the sign gutter, with the names `ALEErrorSign` and `ALEWarningSign`.
|
|
These colors can be customised, or even removed completely:
|
|
|
|
```vim
|
|
highlight clear ALEErrorSign
|
|
highlight clear ALEWarningSign
|
|
```
|
|
|
|
You can configure the sign gutter open at all times, if you wish.
|
|
|
|
```vim
|
|
let g:ale_sign_column_always = 1
|
|
```
|
|
|
|
<a name="faq-change-highlights"></a>
|
|
|
|
### How can I change or disable the highlights ALE uses?
|
|
|
|
ALE's highlights problems with highlight groups which link to `SpellBad`,
|
|
`SpellCap`, `error`, and `todo` groups by default. The characters that are
|
|
highlighted depend on the linters being used, and the information provided to
|
|
ALE.
|
|
|
|
Highlighting can be disabled completely by setting `g:ale_set_highlights` to
|
|
`0`.
|
|
|
|
```vim
|
|
" Set this in your vimrc file to disabling highlighting
|
|
let g:ale_set_highlights = 0
|
|
```
|
|
|
|
You can control all of the highlights ALE uses, say if you are using a different
|
|
color scheme which produces ugly highlights. For example:
|
|
|
|
```vim
|
|
highlight ALEWarning ctermbg=DarkMagenta
|
|
```
|
|
|
|
See `:help ale-highlights` for more information.
|
|
|
|
<a name="faq-echo-format"></a>
|
|
|
|
### How can I change the format for echo messages?
|
|
|
|
There are 3 global options that allow customizing the echoed message.
|
|
|
|
- `g:ale_echo_msg_format` where:
|
|
* `%s` is the error message itself
|
|
* `%...code...%` is an optional error code, and most characters can be
|
|
written between the `%` characters.
|
|
* `%linter%` is the linter name
|
|
* `%severity%` is the severity type
|
|
- `g:ale_echo_msg_error_str` is the string used for error severity.
|
|
- `g:ale_echo_msg_warning_str` is the string used for warning severity.
|
|
|
|
So for example this:
|
|
|
|
```vim
|
|
let g:ale_echo_msg_error_str = 'E'
|
|
let g:ale_echo_msg_warning_str = 'W'
|
|
let g:ale_echo_msg_format = '[%linter%] %s [%severity%]'
|
|
```
|
|
|
|
Will give you:
|
|
|
|
|
|
|
|
See `:help g:ale_echo_msg_format` for more information.
|
|
|
|
<a name="faq-statusline"></a>
|
|
<a name="faq-lightline"></a>
|
|
|
|
### How can I customise the statusline?
|
|
|
|
#### lightline
|
|
|
|
[lightline](https://github.com/itchyny/lightline.vim) does not have built-in
|
|
support for ALE, nevertheless there is a plugin that adds this functionality:
|
|
[maximbaz/lightline-ale](https://github.com/maximbaz/lightline-ale).
|
|
|
|
For more information, check out the sources of that plugin,
|
|
`:help ale#statusline#Count()` and
|
|
[lightline documentation](https://github.com/itchyny/lightline.vim#advanced-configuration).
|
|
|
|
#### vim-airline
|
|
|
|
[vim-airline](https://github.com/vim-airline/vim-airline) integrates with ALE
|
|
for displaying error information in the status bar. If you want to see the
|
|
status for ALE in a nice format, it is recommended to use vim-airline with ALE.
|
|
The airline extension can be enabled by adding the following to your vimrc:
|
|
|
|
```vim
|
|
" Set this. Airline will handle the rest.
|
|
let g:airline#extensions#ale#enabled = 1
|
|
```
|
|
|
|
#### Custom statusline
|
|
|
|
You can implement your own statusline function without adding any other plugins.
|
|
ALE provides some functions to assist in this endeavour, including:
|
|
|
|
* `ale#statusline#Count`: Which returns the number of problems found by ALE
|
|
for a specified buffer.
|
|
* `ale#statusline#FirstProblem`: Which returns a dictionary containing the
|
|
full loclist details of the first problem of a specified type found by ALE
|
|
in a buffer. (e.g. The first style warning in the current buffer.)
|
|
This can be useful for displaying more detailed information such as the
|
|
line number of the first problem in a file.
|
|
|
|
Say you want to display all errors as one figure, and all non-errors as another
|
|
figure. You can do the following:
|
|
|
|
```vim
|
|
function! LinterStatus() abort
|
|
let l:counts = ale#statusline#Count(bufnr(''))
|
|
|
|
let l:all_errors = l:counts.error + l:counts.style_error
|
|
let l:all_non_errors = l:counts.total - l:all_errors
|
|
|
|
return l:counts.total == 0 ? 'OK' : printf(
|
|
\ '%dW %dE',
|
|
\ all_non_errors,
|
|
\ all_errors
|
|
\)
|
|
endfunction
|
|
|
|
set statusline=%{LinterStatus()}
|
|
```
|
|
|
|
See `:help ale#statusline#Count()` or `:help ale#statusline#FirstProblem()`
|
|
for more information.
|
|
|
|
<a name="faq-window-borders"></a>
|
|
|
|
### How can I change the borders for floating preview windows?
|
|
|
|
Borders for floating preview windows are enabled by default. You can use the
|
|
`g:ale_floating_window_border` setting to configure them.
|
|
|
|
You could disable the border with an empty list.
|
|
|
|
```vim
|
|
let g:ale_floating_window_border = []
|
|
```
|
|
|
|
If the terminal supports Unicode, you might try setting the value like below, to
|
|
make it look nicer.
|
|
|
|
```vim
|
|
let g:ale_floating_window_border = ['│', '─', '╭', '╮', '╯', '╰', '│', '─']
|
|
```
|
|
|
|
Since vim's default uses nice Unicode characters when possible, you can trick
|
|
ale into using that default with
|
|
|
|
```vim
|
|
let g:ale_floating_window_border = repeat([''], 8)
|
|
```
|
|
|
|
<a name="faq-my-battery-is-sad"></a>
|
|
|
|
### Will this plugin eat all of my laptop battery power?
|
|
|
|
ALE takes advantage of the power of various tools to check your code. This of
|
|
course means that CPU time will be used to continuously check your code. If you
|
|
are concerned about the CPU time ALE will spend, which will of course imply
|
|
some cost to battery life, you can adjust your settings to make your CPU do
|
|
less work.
|
|
|
|
First, consider increasing the delay before which ALE will run any linters
|
|
while you type. ALE uses a timeout which is cancelled and reset every time you
|
|
type, and this delay can be increased so linters are run less often. See
|
|
`:help g:ale_lint_delay` for more information.
|
|
|
|
If you don't wish to run linters while you type, you can disable that behavior.
|
|
Set `g:ale_lint_on_text_changed` to `never`. You won't get as frequent error
|
|
checking, but ALE shouldn't block your ability to edit a document after you save
|
|
a file, so the asynchronous nature of the plugin will still be an advantage.
|
|
|
|
If you are still concerned, you can turn the automatic linting off altogether,
|
|
including the option `g:ale_lint_on_enter`, and you can run ALE manually with
|
|
`:ALELint`.
|
|
|
|
<a name="faq-coc-nvim"></a>
|
|
<a name="faq-vim-lsp"></a>
|
|
|
|
### How can I use ALE with other LSP clients?
|
|
|
|
ALE offers an API for letting any other plugin integrate with ALE. If you are
|
|
interested in writing an integration, see `:help ale-lint-other-sources`.
|
|
|
|
If you are running ALE in combination with another LSP client, you may wish
|
|
to disable ALE's LSP functionality entirely. You can add a setting to your
|
|
vimrc/init.vim to do so.
|
|
|
|
```vim
|
|
let g:ale_disable_lsp = 1
|
|
```
|
|
|
|
You can also use `b:ale_disable_lsp` in your ftplugin files to enable or disable
|
|
LSP features in ALE for different filetypes.
|
|
|
|
#### Neovim Diagnostics
|
|
|
|
If you are running Neovim 0.6 or later, you can make ALE display errors and
|
|
warnings via the Neovim diagnostics API.
|
|
|
|
```vim
|
|
let g:ale_use_neovim_diagnostics_api = 1
|
|
```
|
|
|
|
<!-- We could expand this section to say a little more. -->
|
|
|
|
#### coc.nvim
|
|
|
|
[coc.nvim](https://github.com/neoclide/coc.nvim) is a popular Vim plugin written
|
|
in TypeScript and dependent on the [npm](https://www.npmjs.com/) ecosystem for
|
|
providing full IDE features to Vim. Both ALE and coc.nvim implement
|
|
[Language Server Protocol](https://microsoft.github.io/language-server-protocol/)
|
|
(LSP) clients for supporting diagnostics (linting with a live server), and other
|
|
features like auto-completion, and others listed above.
|
|
|
|
ALE is primarily focused on integrating with external programs through virtually
|
|
any means, provided the plugin remains almost entirely written in Vim script.
|
|
coc.nvim is primarily focused on bringing IDE features to Vim. If you want to
|
|
run external programs on your files to check for errors, and also use the most
|
|
advanced IDE features, you might want to use both plugins at the same time.
|
|
|
|
The easiest way to get both plugins to work together is to configure coc.nvim to
|
|
send diagnostics to ALE, so ALE controls how all problems are presented to you,
|
|
and to disable all LSP features in ALE, so ALE doesn't try to provide LSP
|
|
features already provided by coc.nvim, such as auto-completion.
|
|
|
|
Open your coc.nvim configuration file with `:CocConfig` and add
|
|
`"diagnostic.displayByAle": true` to your settings.
|
|
|
|
#### vim-lsp
|
|
|
|
[vim-lsp](https://github.com/prabirshrestha/vim-lsp) is a popular plugin as
|
|
implementation of Language Server Protocol (LSP) client for Vim. It provides
|
|
all the LSP features including auto completion, diagnostics, go to definitions,
|
|
etc.
|
|
|
|
[vim-lsp-ale](https://github.com/rhysd/vim-lsp-ale) is a bridge plugin to solve
|
|
the problem when using both ALE and vim-lsp. With the plugin, diagnostics are
|
|
provided by vim-lsp and ALE can handle all the errors. Please read
|
|
[vim-lsp-ale's documentation](https://github.com/rhysd/vim-lsp-ale/blob/master/doc/vim-lsp-ale.txt)
|
|
for more details.
|
|
|
|
<a name="faq-autocmd"></a>
|
|
|
|
### How can I execute some code when ALE starts or stops linting?
|
|
|
|
ALE runs its own [autocmd](http://vimdoc.sourceforge.net/htmldoc/autocmd.html)
|
|
events when a lint or fix cycle are started and stopped. There is also an event
|
|
that runs when a linter job has been successfully started. These events can be
|
|
used to call arbitrary functions during these respective parts of the ALE's
|
|
operation.
|
|
|
|
```vim
|
|
augroup YourGroup
|
|
autocmd!
|
|
autocmd User ALELintPre call YourFunction()
|
|
autocmd User ALELintPost call YourFunction()
|
|
|
|
autocmd User ALEJobStarted call YourFunction()
|
|
|
|
autocmd User ALEFixPre call YourFunction()
|
|
autocmd User ALEFixPost call YourFunction()
|
|
augroup END
|
|
```
|
|
|
|
<a name="faq-navigation"></a>
|
|
|
|
### How can I navigate between errors quickly?
|
|
|
|
ALE offers some commands with `<Plug>` keybinds for moving between warnings and
|
|
errors quickly. You can map the keys Ctrl+j and Ctrl+k to moving between errors
|
|
for example:
|
|
|
|
```vim
|
|
nmap <silent> <C-k> <Plug>(ale_previous_wrap)
|
|
nmap <silent> <C-j> <Plug>(ale_next_wrap)
|
|
```
|
|
|
|
For more information, consult the online documentation with
|
|
`:help ale-navigation-commands`.
|
|
|
|
<a name="faq-lint-on-save"></a>
|
|
|
|
### How can I run linters only when I save files?
|
|
|
|
ALE offers an option `g:ale_lint_on_save` for enabling running the linters when
|
|
files are saved. This option is enabled by default. If you only wish to run
|
|
linters when files are saved, you can turn the other options off.
|
|
|
|
```vim
|
|
" Write this in your vimrc file
|
|
let g:ale_lint_on_text_changed = 'never'
|
|
let g:ale_lint_on_insert_leave = 0
|
|
" You can disable this option too
|
|
" if you don't want linters to run on opening a file
|
|
let g:ale_lint_on_enter = 0
|
|
```
|
|
|
|
If for whatever reason you don't wish to run linters again when you save files,
|
|
you can set `g:ale_lint_on_save` to `0`.
|
|
|
|
<a name="faq-quickfix"></a>
|
|
|
|
### How can I use the quickfix list instead of the loclist?
|
|
|
|
The quickfix list can be enabled by turning the `g:ale_set_quickfix` option on.
|
|
If you wish to also disable the loclist, you can disable the `g:ale_set_loclist`
|
|
option.
|
|
|
|
```vim
|
|
" Write this in your vimrc file
|
|
let g:ale_set_loclist = 0
|
|
let g:ale_set_quickfix = 1
|
|
```
|
|
|
|
If you wish to show Vim windows for the loclist or quickfix items when a file
|
|
contains warnings or errors, `g:ale_open_list` can be set to `1`.
|
|
`g:ale_keep_list_window_open` can be set to `1` if you wish to keep the window
|
|
open even after errors disappear.
|
|
|
|
```vim
|
|
let g:ale_open_list = 1
|
|
" Set this if you want to.
|
|
" This can be useful if you are combining ALE with
|
|
" some other plugin which sets quickfix errors, etc.
|
|
let g:ale_keep_list_window_open = 1
|
|
```
|
|
|
|
You can also set `let g:ale_list_vertical = 1` to open the windows vertically
|
|
instead of the default horizontally.
|
|
|
|
### Why isn't ALE checking my filetype?
|
|
|
|
<a name="faq-jsx-stylelint-eslint"></a>
|
|
|
|
#### stylelint for JSX
|
|
|
|
First, install eslint and install stylelint with
|
|
[stylelint-processor-styled-components](https://github.com/styled-components/stylelint-processor-styled-components).
|
|
|
|
Supposing you have installed both tools correctly, configure your .jsx files so
|
|
`jsx` is included in the filetype. You can use an `autocmd` for this.
|
|
|
|
```vim
|
|
augroup FiletypeGroup
|
|
autocmd!
|
|
au BufNewFile,BufRead *.jsx set filetype=javascript.jsx
|
|
augroup END
|
|
```
|
|
|
|
Supposing the filetype has been set correctly, you can set the following
|
|
options in a jsx.vim ftplugin file.
|
|
|
|
```vim
|
|
" In ~/.vim/ftplugin/jsx.vim, or somewhere similar.
|
|
let b:ale_linter_aliases = ['css', 'javascript']
|
|
let b:ale_linters = ['stylelint', 'eslint']
|
|
```
|
|
|
|
Or if you want, you can configure the linters from your vimrc file.
|
|
|
|
```vim
|
|
" In ~/.vim/vimrc, or somewhere similar.
|
|
let g:ale_linter_aliases = {'jsx': ['css', 'javascript']}
|
|
let g:ale_linters = {'jsx': ['stylelint', 'eslint']}
|
|
```
|
|
|
|
ALE will alias the `jsx` filetype so it uses the `css` filetype linters, and
|
|
use the original Array of selected linters for `jsx` from the `g:ale_linters`
|
|
object. All available linters will be used for the filetype `javascript`, and
|
|
no linter will be run twice for the same file.
|
|
|
|
<a name="faq-vue-eslint"></a>
|
|
|
|
#### Checking Vue with ESLint
|
|
|
|
To check Vue files with ESLint, your ESLint project configuration file must be
|
|
configured to use the [Vue plugin](https://github.com/vuejs/eslint-plugin-vue).
|
|
After that, you need to configure ALE so it will run the JavaScript ESLint
|
|
linter on your files. The settings you need are similar to the settings needed
|
|
for checking JSX code with both stylelint and ESLint, in the previous section.
|
|
|
|
```vim
|
|
" In ~/.vim/ftplugin/vue.vim, or somewhere similar.
|
|
|
|
" Run both javascript and vue linters for vue files.
|
|
let b:ale_linter_aliases = ['javascript', 'vue']
|
|
" Select the eslint and vls linters.
|
|
let b:ale_linters = ['eslint', 'vls']
|
|
```
|
|
|
|
Run `:ALEInfo` to see which linters are available after telling ALE to run
|
|
JavaScript linters on Vue files. Not all linters support checking Vue files.
|
|
|
|
If you don't want to configure your linters in ftplugin files for some reason,
|
|
you can configure them from your vimrc file instead.
|
|
|
|
```vim
|
|
" In ~/.vim/vimrc, or somewhere similar.
|
|
let g:ale_linter_aliases = {'vue': ['vue', 'javascript']}
|
|
let g:ale_linters = {'vue': ['eslint', 'vls']}
|
|
```
|
|
|
|
<a name="faq-c-configuration"></a>
|
|
|
|
### How can I configure my C or C++ project?
|
|
|
|
The structure of C and C++ projects varies wildly from project to project, with
|
|
many different build tools being used for building them, and many different
|
|
formats for project configuration files. ALE can run compilers easily, but
|
|
ALE cannot easily detect which compiler flags to use.
|
|
|
|
Some tools and build configurations can generate
|
|
[compile_commands.json](https://clang.llvm.org/docs/JSONCompilationDatabase.html)
|
|
files. The `cppcheck`, `clangcheck`, `clangtidy` and `cquery` linters can read
|
|
these files for automatically determining the appropriate compiler flags to
|
|
use.
|
|
|
|
For linting with compilers like `gcc` and `clang`, and with other tools, you
|
|
will need to tell ALE which compiler flags to use yourself. You can use
|
|
different options for different projects with the `g:ale_pattern_options`
|
|
setting. Consult the documentation for that setting for more information.
|
|
`b:ale_linters` can be used to select which tools you want to run, say if you
|
|
want to use only `gcc` for one project, and only `clang` for another.
|
|
|
|
ALE will attempt to parse `compile_commands.json` files to discover compiler
|
|
flags to use when linting code. See `:help g:ale_c_parse_compile_commands` for
|
|
more information. See Clang's documentation for
|
|
[compile_commands.json files](https://clang.llvm.org/docs/JSONCompilationDatabase.html).
|
|
You should strongly consider generating them in your builds, which is easy to do
|
|
with CMake.
|
|
|
|
You can also configure ALE to automatically run `make -n` to run dry runs on
|
|
`Makefile`s to discover compiler flags. This can execute arbitrary code, so the
|
|
option is disabled by default. See `:help g:ale_c_parse_makefile`.
|
|
|
|
<a name="faq-vm"></a>
|
|
|
|
### How can I run linters or fixers via Docker or a VM?
|
|
|
|
ALE supports running linters or fixers via Docker, virtual machines, or in
|
|
combination with any remote machine with a different file system, so long as the
|
|
tools are well-integrated with ALE, and ALE is properly configured to run the
|
|
correct commands and map filename paths between different file systems. See
|
|
`:help ale-lint-other-machines` for the full documentation on how to configure
|
|
ALE to support this.
|