mirror of https://github.com/dense-analysis/ale
832 lines
29 KiB
Markdown
832 lines
29 KiB
Markdown
# Asynchronous Lint Engine [](https://travis-ci.com/dense-analysis/ale) [](https://ci.appveyor.com/project/dense-analysis/ale) [](https://gitter.im/vim-ale/Lobby?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
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ALE (Asynchronous Lint Engine) is a plugin providing linting (syntax checking
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and semantic errors) in NeoVim 0.2.0+ and Vim 8 while you edit your text files,
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and acts as a Vim [Language Server Protocol](https://langserver.org/) client.
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<img src="https://user-images.githubusercontent.com/3518142/59195938-3a81b100-8b85-11e9-8e8d-6a601b1db908.gif" alt="A linting example with the darkspectrum color scheme in GVim." title="A linting example with the darkspectrum color scheme in GVim.">
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ALE makes use of NeoVim and Vim 8 job control functions and timers to
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run linters on the contents of text buffers and return errors as
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text is changed in Vim. This allows for displaying warnings and
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errors in files being edited in Vim before files have been saved
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back to a filesystem.
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In other words, this plugin allows you to lint while you type.
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ALE offers support for fixing code with command line tools in a non-blocking
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manner with the `:ALEFix` feature, supporting tools in many languages, like
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`prettier`, `eslint`, `autopep8`, and more.
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ALE acts as a "language client" to support a variety of Language Server Protocol
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features, including:
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* Diagnostics (via Language Server Protocol linters)
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* Go To Definition (`:ALEGoToDefinition`)
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* Completion (Built in completion support, or with Deoplete)
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* Finding references (`:ALEFindReferences`)
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* Hover information (`:ALEHover`)
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* Symbol search (`:ALESymbolSearch`)
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If you don't care about Language Server Protocol, ALE won't load any of the code
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for working with it unless needed. One of ALE's general missions is that you
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won't pay for the features that you don't use.
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**Help Wanted:** If you would like to help maintain this plugin by managing the
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many issues and pull requests that are submitted, please send the author an
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email at [dev@w0rp.com](mailto:dev@w0rp.com?subject=Helping%20with%20ALE).
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If you enjoy this plugin, feel free to contribute or check out the author's
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other content at [w0rp.com](https://w0rp.com).
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## Table of Contents
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1. [Supported Languages and Tools](#supported-languages)
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2. [Usage](#usage)
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1. [Linting](#usage-linting)
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2. [Fixing](#usage-fixing)
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3. [Completion](#usage-completion)
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4. [Go To Definition](#usage-go-to-definition)
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5. [Find References](#usage-find-references)
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6. [Hovering](#usage-hover)
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7. [Symbol Search](#usage-symbol-search)
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3. [Installation](#installation)
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1. [Installation with Vim package management](#standard-installation)
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2. [Installation with Pathogen](#installation-with-pathogen)
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3. [Installation with Vundle](#installation-with-vundle)
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4. [Installation with Vim-Plug](#installation-with-vim-plug)
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4. [Contributing](#contributing)
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5. [FAQ](#faq)
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1. [How do I disable particular linters?](#faq-disable-linters)
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2. [How can I keep the sign gutter open?](#faq-keep-signs)
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3. [How can I change the signs ALE uses?](#faq-change-signs)
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4. [How can I change or disable the highlights ALE uses?](#faq-change-highlights)
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5. [How can I show errors or warnings in my statusline?](#faq-statusline)
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6. [How can I show errors or warnings in my lightline?](#faq-lightline)
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7. [How can I change the format for echo messages?](#faq-echo-format)
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8. [How can I execute some code when ALE starts or stops linting?](#faq-autocmd)
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9. [How can I navigate between errors quickly?](#faq-navigation)
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10. [How can I run linters only when I save files?](#faq-lint-on-save)
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11. [How can I use the quickfix list instead of the loclist?](#faq-quickfix)
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12. [How can I check JSX files with both stylelint and eslint?](#faq-jsx-stylelint-eslint)
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13. [How can I check Vue files with ESLint?](#faq-vue-eslint)
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14. [Will this plugin eat all of my laptop battery power?](#faq-my-battery-is-sad)
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15. [How can I configure my C or C++ project?](#faq-c-configuration)
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16. [How can I configure ALE differently for different buffers?](#faq-buffer-configuration)
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17. [How can I configure the height of the list in which ALE displays errors?](#faq-list-window-height)
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18. [How can I see what ALE has configured for the current file?](#faq-get-info)
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<a name="supported-languages"></a>
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## 1. Supported Languages and Tools
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ALE supports a wide variety of languages and tools. See the
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[full list](supported-tools.md) in the
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[Supported Languages and Tools](supported-tools.md) page.
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<a name="usage"></a>
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## 2. Usage
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<a name="usage-linting"></a>
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### 2.i Linting
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Once this plugin is installed, while editing your files in supported
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languages and tools which have been correctly installed,
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this plugin will send the contents of your text buffers to a variety of
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programs for checking the syntax and semantics of your programs. By default,
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linters will be re-run in the background to check your syntax when you open
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new buffers or as you make edits to your files.
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The behaviour of linting can be configured with a variety of options,
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documented in [the Vim help file](doc/ale.txt). For more information on the
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options ALE offers, consult `:help ale-options` for global options and `:help
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ale-integration-options` for options specified to particular linters.
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<a name="usage-fixing"></a>
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### 2.ii Fixing
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ALE can fix files with the `ALEFix` command. Functions need to be configured
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either in each buffer with a `b:ale_fixers`, or globally with `g:ale_fixers`.
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The recommended way to configure fixers is to define a List in an ftplugin file.
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```vim
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" In ~/.vim/ftplugin/javascript.vim, or somewhere similar.
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" Fix files with prettier, and then ESLint.
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let b:ale_fixers = ['prettier', 'eslint']
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" Equivalent to the above.
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let b:ale_fixers = {'javascript': ['prettier', 'eslint']}
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```
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You can also configure your fixers from vimrc using `g:ale_fixers`, before or
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after ALE has been loaded.
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A `*` in place of the filetype will apply a List of fixers to all files which
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do not match some filetype in the Dictionary.
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Note that using a plain List for `g:ale_fixers` is not supported.
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```vim
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" In ~/.vim/vimrc, or somewhere similar.
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let g:ale_fixers = {
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\ '*': ['remove_trailing_lines', 'trim_whitespace'],
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\ 'javascript': ['eslint'],
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\}
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```
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If you want to automatically fix files when you save them, you need to turn
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a setting on in vimrc.
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```vim
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" Set this variable to 1 to fix files when you save them.
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let g:ale_fix_on_save = 1
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```
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The `:ALEFixSuggest` command will suggest some supported tools for fixing code.
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Both `g:ale_fixers` and `b:ale_fixers` can also accept functions, including
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lambda functions, as fixers, for fixing files with custom tools.
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See `:help ale-fix` for complete information on how to fix files with ALE.
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<a name="usage-completion"></a>
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### 2.iii Completion
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ALE offers some support for completion via hijacking of omnicompletion while you
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type. All of ALE's completion information must come from Language Server
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Protocol linters, or from `tsserver` for TypeScript.
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ALE integrates with [Deoplete](https://github.com/Shougo/deoplete.nvim) as a
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completion source, named `'ale'`. You can configure Deoplete to only use ALE as
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the source of completion information, or mix it with other sources.
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```vim
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" Use ALE and also some plugin 'foobar' as completion sources for all code.
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call deoplete#custom#option('sources', {
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\ '_': ['ale', 'foobar'],
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\})
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```
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ALE also offers its own automatic completion support, which does not require any
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other plugins, and can be enabled by changing a setting before ALE is loaded.
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```vim
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" Enable completion where available.
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" This setting must be set before ALE is loaded.
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"
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" You should not turn this setting on if you wish to use ALE as a completion
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" source for other completion plugins, like Deoplete.
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let g:ale_completion_enabled = 1
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```
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ALE provides an omni-completion function you can use for triggering
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completion manually with `<C-x><C-o>`.
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```vim
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set omnifunc=ale#completion#OmniFunc
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```
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When working with TypeScript files, ALE supports automatic imports from
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external modules. This behavior is disabled by default and can be enabled by
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setting:
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```vim
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let g:ale_completion_tsserver_autoimport = 1
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```
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See `:help ale-completion` for more information.
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<a name="usage-go-to-definition"></a>
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### 2.iv Go To Definition
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ALE supports jumping to the definition of words under your cursor with the
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`:ALEGoToDefinition` command using any enabled Language Server Protocol linters
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and `tsserver`.
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See `:help ale-go-to-definition` for more information.
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<a name="usage-find-references"></a>
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### 2.v Find References
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ALE supports finding references for words under your cursor with the
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`:ALEFindReferences` command using any enabled Language Server Protocol linters
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and `tsserver`.
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See `:help ale-find-references` for more information.
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<a name="usage-hover"></a>
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### 2.vi Hovering
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ALE supports "hover" information for printing brief information about symbols at
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the cursor taken from Language Server Protocol linters and `tsserver` with the
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`ALEHover` command.
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Truncated information will be displayed when the cursor rests on a symbol by
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default, as long as there are no problems on the same line.
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The information can be displayed in a `balloon` tooltip in Vim or GVim by
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hovering your mouse over symbols. Mouse hovering is enabled by default in GVim,
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and needs to be configured for Vim 8.1+ in terminals.
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See `:help ale-hover` for more information.
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<a name="usage-symbol-search"></a>
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### 2.vii Symbol Search
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ALE supports searching for workspace symbols via Language Server Protocol
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linters with the `ALESymbolSearch` command.
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Search queries can be performed to find functions, types, and more which are
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similar to a given query string.
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See `:help ale-symbol-search` for more information.
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<a name="installation"></a>
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## 3. Installation
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To install this plugin, you should use one of the following methods.
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For Windows users, replace usage of the Unix `~/.vim` directory with
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`%USERPROFILE%\vimfiles`, or another directory if you have configured
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Vim differently. On Windows, your `~/.vimrc` file will be similarly
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stored in `%USERPROFILE%\_vimrc`.
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<a name="standard-installation"></a>
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### 3.i. Installation with Vim package management
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In Vim 8 and NeoVim, you can install plugins easily without needing to use
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any other tools. Simply clone the plugin into your `pack` directory.
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#### Vim 8 on Unix
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```bash
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mkdir -p ~/.vim/pack/git-plugins/start
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git clone --depth 1 https://github.com/dense-analysis/ale.git ~/.vim/pack/git-plugins/start/ale
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```
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#### NeoVim on Unix
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```bash
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mkdir -p ~/.local/share/nvim/site/pack/git-plugins/start
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git clone --depth 1 https://github.com/dense-analysis/ale.git ~/.local/share/nvim/site/pack/git-plugins/start/ale
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```
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#### Vim 8 on Windows
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```bash
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# Run these commands in the "Git for Windows" Bash terminal
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mkdir -p ~/vimfiles/pack/git-plugins/start
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git clone --depth 1 https://github.com/dense-analysis/ale.git ~/vimfiles/pack/git-plugins/start/ale
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```
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#### Generating Vim help files
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You can add the following line to your vimrc files to generate documentation
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tags automatically, if you don't have something similar already, so you can use
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the `:help` command to consult ALE's online documentation:
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```vim
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" Put these lines at the very end of your vimrc file.
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" Load all plugins now.
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" Plugins need to be added to runtimepath before helptags can be generated.
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packloadall
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" Load all of the helptags now, after plugins have been loaded.
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" All messages and errors will be ignored.
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silent! helptags ALL
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```
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<a name="installation-with-pathogen"></a>
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### 3.ii. Installation with Pathogen
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To install this module with [Pathogen](https://github.com/tpope/vim-pathogen),
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you should clone this repository to your bundle directory, and ensure
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you have the line `execute pathogen#infect()` in your `~/.vimrc` file.
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You can run the following commands in your terminal to do so:
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```bash
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cd ~/.vim/bundle
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git clone https://github.com/dense-analysis/ale.git
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```
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<a name="installation-with-vundle"></a>
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### 3.iii. Installation with Vundle
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You can install this plugin using [Vundle](https://github.com/VundleVim/Vundle.vim)
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by using the path on GitHub for this repository.
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```vim
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Plugin 'dense-analysis/ale'
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```
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See the Vundle documentation for more information.
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<a name="installation-with-vim-plug"></a>
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### 3.iiii. Installation with Vim-Plug
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You can install this plugin using [Vim-Plug](https://github.com/junegunn/vim-plug)
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by adding the GitHub path for this repository to your `~/.vimrc`
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and running `:PlugInstall`.
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```vim
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Plug 'dense-analysis/ale'
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```
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<a name="contributing"></a>
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## 4. Contributing
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If you would like to see support for more languages and tools, please
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[create an issue](https://github.com/dense-analysis/ale/issues)
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or [create a pull request](https://github.com/dense-analysis/ale/pulls).
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If your tool can read from stdin or you have code to suggest which is good,
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support can be happily added for it.
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If you are interested in the general direction of the project, check out the
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[wiki home page](https://github.com/dense-analysis/ale/wiki). The wiki includes
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a Roadmap for the future, and more.
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If you'd liked to discuss the project more directly, check out the `#vim-ale` channel
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on Freenode. Web chat is available [here](https://webchat.freenode.net/?channels=vim-ale).
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<a name="faq"></a>
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## 5. FAQ
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<a name="faq-disable-linters"></a>
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### 5.i. How do I disable particular linters?
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By default, all available tools for all supported languages will be run. If you
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want to only select a subset of the tools, you can define `b:ale_linters` for a
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single buffer, or `g:ale_linters` globally.
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The recommended way to configure linters is to define a List in an ftplugin
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file.
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```vim
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" In ~/.vim/ftplugin/javascript.vim, or somewhere similar.
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" Enable ESLint only for JavaScript.
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let b:ale_linters = ['eslint']
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" Equivalent to the above.
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let b:ale_linters = {'javascript': ['eslint']}
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```
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You can also declare which linters you want to run in your vimrc file, before or
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after ALE has been loaded.
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```vim
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" In ~/.vim/vimrc, or somewhere similar.
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let g:ale_linters = {
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\ 'javascript': ['eslint'],
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\}
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```
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For all languages unspecified in the dictionary, all possible linters will
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be run for those languages, just as when the dictionary is not defined.
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Running many linters should not typically obstruct editing in Vim,
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as they will all be executed in separate processes simultaneously.
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If you don't want ALE to run anything other than what you've explicitly asked
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for, you can set `g:ale_linters_explicit` to `1`.
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```vim
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" Only run linters named in ale_linters settings.
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let g:ale_linters_explicit = 1
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```
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This plugin will look for linters in the [`ale_linters`](ale_linters) directory.
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Each directory within corresponds to a particular filetype in Vim, and each file
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in each directory corresponds to the name of a particular linter.
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<a name="faq-keep-signs"></a>
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### 5.ii. How can I keep the sign gutter open?
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You can keep the sign gutter open at all times by setting the
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`g:ale_sign_column_always` to 1
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```vim
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let g:ale_sign_column_always = 1
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```
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<a name="faq-change-signs"></a>
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### 5.iii. How can I change the signs ALE uses?
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Use these options to specify what text should be used for signs:
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```vim
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let g:ale_sign_error = '>>'
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let g:ale_sign_warning = '--'
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```
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ALE sets some background colors automatically for warnings and errors
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in the sign gutter, with the names `ALEErrorSign` and `ALEWarningSign`.
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These colors can be customised, or even removed completely:
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```vim
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highlight clear ALEErrorSign
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highlight clear ALEWarningSign
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```
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<a name="faq-change-highlights"></a>
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### 5.iv. How can I change or disable the highlights ALE uses?
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ALE's highlights problems with highlight groups which link to `SpellBad`,
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`SpellCap`, `error`, and `todo` groups by default. The characters that are
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highlighted depend on the linters being used, and the information provided to
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ALE.
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Highlighting can be disabled completely by setting `g:ale_set_highlights` to
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`0`.
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```vim
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" Set this in your vimrc file to disabling highlighting
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let g:ale_set_highlights = 0
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```
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You can control all of the highlights ALE uses, say if you are using a different
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color scheme which produces ugly highlights. For example:
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```vim
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highlight ALEWarning ctermbg=DarkMagenta
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```
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See `:help ale-highlights` for more information.
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<a name="faq-statusline"></a>
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### 5.v. How can I show errors or warnings in my statusline?
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[vim-airline](https://github.com/vim-airline/vim-airline) integrates with ALE
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for displaying error information in the status bar. If you want to see the
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status for ALE in a nice format, it is recommended to use vim-airline with ALE.
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The airline extension can be enabled by adding the following to your vimrc:
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```vim
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" Set this. Airline will handle the rest.
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let g:airline#extensions#ale#enabled = 1
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```
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If you don't want to use vim-airline, you can implement your own statusline
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|
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-lightline"></a>
|
|
|
|
### 5.vi. How can I show errors or warnings in my 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).
|
|
|
|
<a name="faq-echo-format"></a>
|
|
|
|
### 5.vii. 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-autocmd"></a>
|
|
|
|
### 5.viii. 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>
|
|
|
|
### 5.ix. 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>
|
|
|
|
### 5.x. 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>
|
|
|
|
### 5.xi. 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.
|
|
|
|
<a name="faq-jsx-stylelint-eslint"></a>
|
|
|
|
### 5.xii. How can I check JSX files with both stylelint and eslint?
|
|
|
|
If you configure ALE options correctly in your vimrc file, and install
|
|
the right tools, you can check JSX files with stylelint and eslint.
|
|
|
|
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>
|
|
|
|
### 5.xiii. How can I check Vue files 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-my-battery-is-sad"></a>
|
|
|
|
### 5.xiv. 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 behaviour.
|
|
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-c-configuration"></a>
|
|
|
|
### 5.xv. 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.
|
|
|
|
You may also configure buffer-local settings for linters with project-specific
|
|
vimrc files. [local_vimrc](https://github.com/LucHermitte/local_vimrc) can be
|
|
used for executing local vimrc files which can be shared in your project.
|
|
|
|
<a name="faq-buffer-configuration"></a>
|
|
|
|
### 5.xvi. How can I configure ALE differently for different buffers?
|
|
|
|
ALE offers various ways to configure which linters or fixers are run, and
|
|
other settings. For the majority of ALE's settings, they can either be
|
|
configured globally with a `g:` variable prefix, or for a specific buffer
|
|
with a `b:` variable prefix. For example, you can configure a Python ftplugin
|
|
file like so.
|
|
|
|
```vim
|
|
" In ~/.vim/ftplugin/python.vim
|
|
|
|
" Check Python files with flake8 and pylint.
|
|
let b:ale_linters = ['flake8', 'pylint']
|
|
" Fix Python files with autopep8 and yapf.
|
|
let b:ale_fixers = ['autopep8', 'yapf']
|
|
" Disable warnings about trailing whitespace for Python files.
|
|
let b:ale_warn_about_trailing_whitespace = 0
|
|
```
|
|
|
|
For configuring files based on regular expression patterns matched against the
|
|
absolute path to a file, you can use `g:ale_pattern_options`.
|
|
|
|
```vim
|
|
" Do not lint or fix minified files.
|
|
let g:ale_pattern_options = {
|
|
\ '\.min\.js$': {'ale_linters': [], 'ale_fixers': []},
|
|
\ '\.min\.css$': {'ale_linters': [], 'ale_fixers': []},
|
|
\}
|
|
" If you configure g:ale_pattern_options outside of vimrc, you need this.
|
|
let g:ale_pattern_options_enabled = 1
|
|
```
|
|
|
|
Buffer-local variables for settings always override the global settings.
|
|
|
|
<a name="faq-list-window-height"></a>
|
|
|
|
### 5.xvii. How can I configure the height of the list in which ALE displays errors?
|
|
|
|
To set a default height for the error list, use the `g:ale_list_window_size` variable.
|
|
|
|
```vim
|
|
" Show 5 lines of errors (default: 10)
|
|
let g:ale_list_window_size = 5
|
|
```
|
|
|
|
<a name="faq-get-info"></a>
|
|
|
|
### 5.xviii. How can I see what ALE has configured for the current file?
|
|
|
|
Run the following to see what is currently configured:
|
|
|
|
```vim
|
|
:ALEInfo
|
|
```
|