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ale.txt
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ale.txt
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*ale.txt* For Vim version 8.0.
*ale*
ALE - Asynchronous Lint Engine
===============================================================================
CONTENTS *ale-contents*
1. Introduction.........................|ale-introduction|
2. Supported Languages & Tools..........|ale-support|
3. Linting..............................|ale-lint|
4. Fixing Problems......................|ale-fix|
5. Language Server Protocol Support.....|ale-lsp|
5.1 Completion........................|ale-completion|
5.2 Go To Definition..................|ale-go-to-definition|
5.3 Find References...................|ale-find-references|
6. Global Options.......................|ale-options|
6.1 Highlights........................|ale-highlights|
6.2 Options for write-good Linter.....|ale-write-good-options|
7. Integration Documentation............|ale-integrations|
asciidoc..............................|ale-asciidoc-options|
write-good..........................|ale-asciidoc-write-good|
asm...................................|ale-asm-options|
gcc.................................|ale-asm-gcc|
awk...................................|ale-awk-options|
gawk................................|ale-awk-gawk|
c.....................................|ale-c-options|
clang...............................|ale-c-clang|
clang-format........................|ale-c-clangformat|
clangtidy...........................|ale-c-clangtidy|
cppcheck............................|ale-c-cppcheck|
flawfinder..........................|ale-c-flawfinder|
gcc.................................|ale-c-gcc|
chef..................................|ale-chef-options|
foodcritic..........................|ale-chef-foodcritic|
clojure...............................|ale-clojure-options|
joker...............................|ale-clojure-joker|
cmake.................................|ale-cmake-options|
cmakelint...........................|ale-cmake-cmakelint|
cpp...................................|ale-cpp-options|
clang...............................|ale-cpp-clang|
clangcheck..........................|ale-cpp-clangcheck|
clang-format........................|ale-cpp-clangformat|
clangtidy...........................|ale-cpp-clangtidy|
cppcheck............................|ale-cpp-cppcheck|
cpplint.............................|ale-cpp-cpplint|
flawfinder..........................|ale-cpp-flawfinder|
gcc.................................|ale-cpp-gcc|
c#....................................|ale-cs-options|
mcs.................................|ale-cs-mcs|
mcsc................................|ale-cs-mcsc|
css...................................|ale-css-options|
prettier............................|ale-css-prettier|
stylelint...........................|ale-css-stylelint|
cuda..................................|ale-cuda-options|
nvcc................................|ale-cuda-nvcc|
dart..................................|ale-dart-options|
dartanalyzer........................|ale-dart-dartanalyzer|
dockerfile............................|ale-dockerfile-options|
hadolint............................|ale-dockerfile-hadolint|
elixir................................|ale-elixir-options|
mix.................................|ale-elixir-mix|
mix_format..........................|ale-elixir-mix-format|
dialyxir............................|ale-elixir-dialyxir|
elm...................................|ale-elm-options|
elm-format..........................|ale-elm-elm-format|
elm-make............................|ale-elm-elm-make|
erlang................................|ale-erlang-options|
erlc................................|ale-erlang-erlc|
syntaxerl...........................|ale-erlang-syntaxerl|
eruby.................................|ale-eruby-options|
fish..................................|ale-fish-options|
fortran...............................|ale-fortran-options|
gcc.................................|ale-fortran-gcc|
fountain..............................|ale-fountain-options|
fusionscript..........................|ale-fuse-options|
fusion-lint.........................|ale-fuse-fusionlint|
git commit............................|ale-gitcommit-options|
gitlint.............................|ale-gitcommit-gitlint|
glsl..................................|ale-glsl-options|
glslang.............................|ale-glsl-glslang|
glslls..............................|ale-glsl-glslls|
go....................................|ale-go-options|
gobuild.............................|ale-go-gobuild|
gofmt...............................|ale-go-gofmt|
gometalinter........................|ale-go-gometalinter|
staticcheck.........................|ale-go-staticcheck|
graphql...............................|ale-graphql-options|
eslint..............................|ale-graphql-eslint|
gqlint..............................|ale-graphql-gqlint|
prettier............................|ale-graphql-prettier|
handlebars............................|ale-handlebars-options|
ember-template-lint.................|ale-handlebars-embertemplatelint|
haskell...............................|ale-haskell-options|
brittany............................|ale-haskell-brittany|
ghc.................................|ale-haskell-ghc|
hdevtools...........................|ale-haskell-hdevtools|
hfmt................................|ale-haskell-hfmt|
stack-build.........................|ale-haskell-stack-build|
html..................................|ale-html-options|
htmlhint............................|ale-html-htmlhint|
tidy................................|ale-html-tidy|
write-good..........................|ale-html-write-good|
idris.................................|ale-idris-options|
idris...............................|ale-idris-idris|
java..................................|ale-java-options|
checkstyle..........................|ale-java-checkstyle|
javac...............................|ale-java-javac|
google-java-format..................|ale-java-google-java-format|
pmd.................................|ale-java-pmd|
javascript............................|ale-javascript-options|
eslint..............................|ale-javascript-eslint|
flow................................|ale-javascript-flow|
importjs............................|ale-javascript-importjs|
jscs................................|ale-javascript-jscs|
jshint..............................|ale-javascript-jshint|
prettier............................|ale-javascript-prettier|
prettier-eslint.....................|ale-javascript-prettier-eslint|
prettier-standard...................|ale-javascript-prettier-standard|
standard............................|ale-javascript-standard|
xo..................................|ale-javascript-xo|
json..................................|ale-json-options|
fixjson.............................|ale-json-fixjson|
jsonlint............................|ale-json-jsonlint|
jq..................................|ale-json-jq|
prettier............................|ale-json-prettier|
kotlin................................|ale-kotlin-options|
kotlinc.............................|ale-kotlin-kotlinc|
ktlint..............................|ale-kotlin-ktlint|
latex.................................|ale-latex-options|
write-good..........................|ale-latex-write-good|
less..................................|ale-less-options|
lessc...............................|ale-less-lessc|
prettier............................|ale-less-prettier|
stylelint...........................|ale-less-stylelint|
llvm..................................|ale-llvm-options|
llc.................................|ale-llvm-llc|
lua...................................|ale-lua-options|
luac................................|ale-lua-luac|
luacheck............................|ale-lua-luacheck|
markdown..............................|ale-markdown-options|
mdl.................................|ale-markdown-mdl|
prettier............................|ale-markdown-prettier|
textlint............................|ale-markdown-textlint|
write-good..........................|ale-markdown-write-good|
mercury...............................|ale-mercury-options|
mmc.................................|ale-mercury-mmc|
nroff.................................|ale-nroff-options|
write-good..........................|ale-nroff-write-good|
objc..................................|ale-objc-options|
clang...............................|ale-objc-clang|
objcpp................................|ale-objcpp-options|
clang...............................|ale-objcpp-clang|
ocaml.................................|ale-ocaml-options|
merlin..............................|ale-ocaml-merlin|
ols.................................|ale-ocaml-ols|
perl..................................|ale-perl-options|
perl................................|ale-perl-perl|
perlcritic..........................|ale-perl-perlcritic|
perltidy............................|ale-perl-perltidy|
php...................................|ale-php-options|
hack................................|ale-php-hack|
hackfmt.............................|ale-php-hackfmt|
langserver..........................|ale-php-langserver|
phan................................|ale-php-phan|
phpcbf..............................|ale-php-phpcbf|
phpcs...............................|ale-php-phpcs|
phpmd...............................|ale-php-phpmd|
phpstan.............................|ale-php-phpstan|
php-cs-fixer........................|ale-php-php-cs-fixer|
po....................................|ale-po-options|
write-good..........................|ale-po-write-good|
pod...................................|ale-pod-options|
write-good..........................|ale-pod-write-good|
pony..................................|ale-pony-options|
ponyc...............................|ale-pony-ponyc|
proto.................................|ale-proto-options|
protoc-gen-lint.....................|ale-proto-protoc-gen-lint|
pug...................................|ale-pug-options|
puglint.............................|ale-pug-puglint|
puppet................................|ale-puppet-options|
puppetlint..........................|ale-puppet-puppetlint|
python................................|ale-python-options|
autopep8............................|ale-python-autopep8|
black...............................|ale-python-black|
flake8..............................|ale-python-flake8|
isort...............................|ale-python-isort|
mypy................................|ale-python-mypy|
prospector..........................|ale-python-prospector|
pycodestyle.........................|ale-python-pycodestyle|
pylint..............................|ale-python-pylint|
pyls................................|ale-python-pyls|
yapf................................|ale-python-yapf|
qml...................................|ale-qml-options|
qmlfmt..............................|ale-qml-qmlfmt|
r.....................................|ale-r-options|
lintr...............................|ale-r-lintr|
reasonml..............................|ale-reasonml-options|
merlin..............................|ale-reasonml-merlin|
ols.................................|ale-reasonml-ols|
refmt...............................|ale-reasonml-refmt|
restructuredtext......................|ale-restructuredtext-options|
write-good..........................|ale-restructuredtext-write-good|
ruby..................................|ale-ruby-options|
brakeman............................|ale-ruby-brakeman|
rails_best_practices................|ale-ruby-rails_best_practices|
reek................................|ale-ruby-reek|
rubocop.............................|ale-ruby-rubocop|
ruby................................|ale-ruby-ruby|
rufo................................|ale-ruby-rufo|
rust..................................|ale-rust-options|
cargo...............................|ale-rust-cargo|
rls.................................|ale-rust-rls|
rustc...............................|ale-rust-rustc|
rustfmt.............................|ale-rust-rustfmt|
sass..................................|ale-sass-options|
stylelint...........................|ale-sass-stylelint|
scala.................................|ale-scala-options|
scalastyle..........................|ale-scala-scalastyle|
scss..................................|ale-scss-options|
prettier............................|ale-scss-prettier|
stylelint...........................|ale-scss-stylelint|
sh....................................|ale-sh-options|
shell...............................|ale-sh-shell|
shellcheck..........................|ale-sh-shellcheck|
shfmt...............................|ale-sh-shfmt|
sml...................................|ale-sml-options|
smlnj...............................|ale-sml-smlnj|
solidity..............................|ale-solidity-options|
solhint.............................|ale-solidity-solhint|
solium..............................|ale-solidity-solium|
spec..................................|ale-spec-options|
rpmlint.............................|ale-spec-rpmlint|
stylus................................|ale-stylus-options|
stylelint...........................|ale-stylus-stylelint|
tcl...................................|ale-tcl-options|
nagelfar............................|ale-tcl-nagelfar|
terraform.............................|ale-terraform-options|
tflint..............................|ale-terraform-tflint|
tex...................................|ale-tex-options|
chktex..............................|ale-tex-chktex|
lacheck.............................|ale-tex-lacheck|
texinfo...............................|ale-texinfo-options|
write-good..........................|ale-texinfo-write-good|
text..................................|ale-text-options|
textlint............................|ale-text-textlint|
write-good..........................|ale-text-write-good|
thrift................................|ale-thrift-options|
thrift..............................|ale-thrift-thrift|
typescript............................|ale-typescript-options|
eslint..............................|ale-typescript-eslint|
prettier............................|ale-typescript-prettier|
tslint..............................|ale-typescript-tslint|
tsserver............................|ale-typescript-tsserver|
verilog/systemverilog.................|ale-verilog-options|
iverilog............................|ale-verilog-iverilog|
verilator...........................|ale-verilog-verilator|
vim...................................|ale-vim-options|
vint................................|ale-vim-vint|
vim help..............................|ale-vim-help-options|
write-good..........................|ale-vim-help-write-good|
vue...................................|ale-vue-options|
prettier............................|ale-vue-prettier|
xhtml.................................|ale-xhtml-options|
write-good..........................|ale-xhtml-write-good|
xml...................................|ale-xml-options|
xmllint.............................|ale-xml-xmllint|
yaml..................................|ale-yaml-options|
swaglint............................|ale-yaml-swaglint|
yamllint............................|ale-yaml-yamllint|
8. Commands/Keybinds....................|ale-commands|
9. API..................................|ale-api|
10. Special Thanks......................|ale-special-thanks|
11. Contact.............................|ale-contact|
===============================================================================
1. Introduction *ale-introduction*
ALE provides the means to run linters asynchronously in Vim in a variety of
languages and tools. ALE sends the contents of buffers to linter programs
using the |job-control| features available in Vim 8 and NeoVim. For Vim 8,
Vim must be compiled with the |job| and |channel| and |timers| features
as a minimum.
ALE supports the following key features for linting:
1. Running linters when text is changed.
2. Running linters when files are opened.
3. Running linters when files are saved. (When a global flag is set.)
4. Populating the |loclist| with warning and errors.
5. Setting |signs| with warnings and errors for error markers.
6. Using |echo| to show error messages when the cursor moves.
7. Setting syntax highlights for errors.
ALE can fix problems with files with the |ALEFix| command, using the same job
control functionality used for checking for problems. Try using the
|ALEFixSuggest| command for browsing tools that can be used to fix problems
for the current buffer.
===============================================================================
2. Supported Languages & Tools *ale-support*
The following languages and tools are supported.
Notes:
`^` No linters for text or Vim help filetypes are enabled by default.
`!!` These linters check only files on disk. See |ale-lint-file-linters|
* ASM: `gcc`
* Ansible: `ansible-lint`
* API Blueprint: `drafter`
* AsciiDoc: `alex`!!, `proselint`, `redpen`, `write-good`
* Awk: `gawk`
* Bash: `shell` (-n flag), `shellcheck`, `shfmt`
* Bourne Shell: `shell` (-n flag), `shellcheck`, `shfmt`
* C: `cppcheck`, `cpplint`!!, `clang`, `clangtidy`!!, `clang-format`, `flawfinder`, `gcc`
* C++ (filetype cpp): `clang`, `clangcheck`!!, `clangtidy`!!, `clang-format`, `cppcheck`, `cpplint`!!, `flawfinder`, `gcc`
* CUDA: `nvcc`!!
* C#: `mcs`, `mcsc`!!
* Chef: `foodcritic`
* Clojure: `joker`
* CMake: `cmakelint`
* CoffeeScript: `coffee`, `coffeelint`
* Crystal: `crystal`!!
* CSS: `csslint`, `prettier`, `stylelint`
* Cucumber: `cucumber`
* Cython (pyrex filetype): `cython`
* D: `dmd`
* Dafny: `dafny`!!
* Dart: `dartanalyzer`!!, `language_server`
* Dockerfile: `hadolint`
* Elixir: `credo`, `dialyxir`, `dogma`!!
* Elm: `elm-format, elm-make`
* Erb: `erb`, `erubi`, `erubis`
* Erlang: `erlc`, `SyntaxErl`
* Fish: `fish` (-n flag)
* Fortran: `gcc`
* Fountain: `proselint`
* FusionScript: `fusion-lint`
* Git Commit Messages: `gitlint`
* GLSL: glslang, `glslls`
* Go: `gofmt`, `goimports`, `go vet`!!, `golint`, `gotype`!!, `gometalinter`!!, `go build`!!, `gosimple`!!, `staticcheck`!!
* GraphQL: `eslint`, `gqlint`, `prettier`
* Haml: `haml-lint`
* Handlebars: `ember-template-lint`
* Haskell: `brittany`, `ghc`, `stack-ghc`, `stack-build`!!, `ghc-mod`, `stack-ghc-mod`, `hlint`, `hdevtools`, `hfmt`
* HTML: `alex`!!, `HTMLHint`, `proselint`, `tidy`, `write-good`
* Idris: `idris`
* Java: `checkstyle`, `javac`, `google-java-format`, `PMD`
* JavaScript: `eslint`, `flow`, `jscs`, `jshint`, `prettier`, `prettier-eslint`, `prettier-standard`, `standard`, `xo`
* JSON: `fixjson`, `jsonlint`, `jq`, `prettier`
* Kotlin: `kotlinc`, `ktlint`
* LaTeX (tex): `alex`!!, `chktex`, `lacheck`, `proselint`, `redpen`, `vale`, `write-good`
* Less: `lessc`, `prettier`, `stylelint`
* LLVM: `llc`
* Lua: `luac`, `luacheck`
* Mail: `alex`!!, `proselint`, `vale`
* Make: `checkmake`
* Markdown: `alex`!!, `markdownlint`!!, `mdl`, `prettier`, `proselint`, `redpen`, `remark-lint`, `textlint`, `vale`, `write-good`
* MATLAB: `mlint`
* Mercury: `mmc`!!
* Nim: `nim check`!!
* nix: `nix-instantiate`
* nroff: `alex`!!, `proselint`, `write-good`
* Objective-C: `clang`
* Objective-C++: `clang`
* OCaml: `merlin` (see |ale-ocaml-merlin|), `ols`
* Perl: `perl -c`, `perl-critic`, `perltidy`
* PHP: `hack`, `hackfmt`, `langserver`, `phan`, `php -l`, `phpcs`, `phpmd`, `phpstan`, `phpcbf`, `php-cs-fixer`
* PO: `alex`!!, `msgfmt`, `proselint`, `write-good`
* Pod: `alex`!!, `proselint`, `write-good`
* Pony: `ponyc`
* proto: `protoc-gen-lint`
* Pug: `pug-lint`
* Puppet: `puppet`, `puppet-lint`
* Python: `autopep8`, `black`, `flake8`, `isort`, `mypy`, `prospector`, `pycodestyle`, `pyls`, `pylint`!!, `yapf`
* QML: `qmlfmt`, `qmllint`
* R: `lintr`
* ReasonML: `merlin`, `ols`, `refmt`
* reStructuredText: `alex`!!, `proselint`, `redpen`, `rstcheck`, `vale`, `write-good`
* Re:VIEW: `redpen`
* RPM spec: `rpmlint`
* Ruby: `brakeman`, `rails_best_practices`!!, `reek`, `rubocop`, `ruby`, `rufo`
* Rust: `cargo`!!, `rls`, `rustc` (see |ale-integration-rust|), `rustfmt`
* SASS: `sass-lint`, `stylelint`
* SCSS: `prettier`, `sass-lint`, `scss-lint`, `stylelint`
* Scala: `fsc`, `scalac`, `scalastyle`
* Slim: `slim-lint`
* SML: `smlnj`
* Solidity: `solhint`, `solium`
* Stylus: `stylelint`
* SQL: `sqlint`
* Swift: `swiftlint`, `swiftformat`
* Tcl: `nagelfar`!!
* Terraform: `tflint`
* Texinfo: `alex`!!, `proselint`, `write-good`
* Text^: `alex`!!, `proselint`, `redpen`, `textlint`, `vale`, `write-good`
* Thrift: `thrift`
* TypeScript: `eslint`, `prettier`, `tslint`, `tsserver`, `typecheck`
* Verilog: `iverilog`, `verilator`
* Vim: `vint`
* Vim help^: `alex`!!, `proselint`, `write-good`
* Vue: `prettier`
* XHTML: `alex`!!, `proselint`, `write-good`
* XML: `xmllint`
* YAML: `swaglint`, `yamllint`
===============================================================================
3. Linting *ale-lint*
ALE's primary focus is on checking for problems with your code with various
programs via some Vim code for integrating with those programs, referred to
as 'linters.' ALE supports a wide array of programs for linting by default,
but additional programs can be added easily by defining files in |runtimepath|
with the filename pattern `ale_linters/<filetype>/<filename>.vim`. For more
information on defining new linters, see the extensive documentation
for |ale#linter#Define()|.
Without any configuration, ALE will attempt to check all of the code for every
file you open in Vim with all available tools by default. To see what ALE
is doing, and what options have been set, try using the |:ALEInfo| command.
Most of the linters ALE runs will check the Vim buffer you are editing instead
of the file on disk. This allows you to check your code for errors before you
have even saved your changes. ALE will check your code in the following
circumstances, which can be configured with the associated options.
* When you modify a buffer. - |g:ale_lint_on_text_changed|
* When you open a new or modified buffer. - |g:ale_lint_on_enter|
* When you save a buffer. - |g:ale_lint_on_save|
* When the filetype changes for a buffer. - |g:ale_lint_on_filetype_changed|
* If ALE is used to check code manually. - |:ALELint|
In addition to the above options, ALE can also check buffers for errors when
you leave insert mode with |g:ale_lint_on_insert_leave|, which is off by
default. It is worth reading the documentation for every option.
*ale-lint-file-linters*
Some programs must be run against files which have been saved to disk, and
simply do not support reading temporary files or stdin, either of which are
required for ALE to be able to check for errors as you type. The programs
which behave this way are documented in the lists and tables of supported
programs. ALE will only lint files with these programs in the following
circumstances.
* When you open a new or modified buffer. - |g:ale_lint_on_enter|
* When you save a buffer. - |g:ale_lint_on_save|
* When the filetype changes for a buffer. - |g:ale_lint_on_filetype_changed|
* If ALE is used to check code manually. - |:ALELint|
ALE will report problems with your code in the following ways, listed with
their relevant options.
* By updating loclist. (On by default) - |g:ale_set_loclist|
* By updating quickfix. (Off by default) - |g:ale_set_quickfix|
* By setting error highlights. - |g:ale_set_highlights|
* By creating signs in the sign column. - |g:ale_set_signs|
* By echoing messages based on your cursor. - |g:ale_echo_cursor|
* By showing balloons for your mouse cursor - |g:ale_set_balloons|
Please consult the documentation for each option, which can reveal some other
ways of tweaking the behaviour of each way of displaying problems. You can
disable or enable whichever options you prefer.
Most settings can be configured for each buffer. (|b:| instead of |g:|),
including disabling ALE for certain buffers with |b:ale_enabled|. The
|g:ale_pattern_options| setting can be used to configure files differently
based on regular expressions for filenames. For configuring entire projects,
the buffer-local options can be used with external plugins for reading Vim
project configuration files. Buffer-local settings can also be used in
ftplugin files for different filetypes.
===============================================================================
4. Fixing Problems *ale-fix*
ALE can fix problems with files with the |ALEFix| command. |ALEFix|
accepts names of fixers to be applied as arguments. Alternatively,
when no arguments are provided, the variable |g:ale_fixers| will be
read for getting a |List| of commands for filetypes, split on `.`, and
the functions named in |g:ale_fixers| will be executed for fixing the
errors.
The |ALEFixSuggest| command can be used to suggest tools that be used to
fix problems for the current buffer.
The values for `g:ale_fixers` can be a list of |String|, |Funcref|, or
|lambda| values. String values must either name a function, or a short name
for a function set in the ALE fixer registry.
Each function for fixing errors must accept either one argument `(buffer)` or
two arguments `(buffer, lines)`, representing the buffer being fixed and the
lines to fix. The functions must return either `0`, for changing nothing, a
|List| for new lines to set, or a |Dictionary| for describing a command to be
run in the background.
Functions receiving a variable number of arguments will not receive the second
argument `lines`. Functions should name two arguments if the `lines` argument
is desired. This is required to avoid unnecessary copying of the lines of
the buffers being checked.
When a |Dictionary| is returned for an |ALEFix| callback, the following keys
are supported for running the commands.
`command` A |String| for the command to run. This key is required.
When `%t` is included in a command string, a temporary
file will be created, containing the lines from the file
after previous adjustment have been done.
`read_temporary_file` When set to `1`, ALE will read the contents of the
temporary file created for `%t`. This option can be used
for commands which need to modify some file on disk in
order to fix files.
`process_with` An optional callback for post-processing.
The callback must accept two arguments,
`(buffer, output)`, which can be used for converting
the output from a command into lines to replace the
buffer's contents with.
A |List| of |String|s must be returned.
`chain_with` An optional key for defining a callback to call next.
The callback must accept two or three arguments,
`(buffer, output)` or `(buffer, output, input)` .
Functions receiving a variable number of arguments will
only receive the first two values. The `output` argument
will contain the lines of output from the command run.
The `input` argument is the List of lines for the
buffer, after applying any previous fixers.
The callback must return the same values returned for
any fixer function. This allows fixer functions to be
chained recursively.
When the command string returned for a fixer is an empty
string, the next command in the chain will still be run.
This allows commands to be skipped, like version checks
that are cached. An empty List will be passed to the
next callback in the chain for the `output`.
`read_buffer` An optional key for disabling reading the buffer.
When set to `0`, ALE will not pipe the buffer's data
into the command via stdin. This option is ignored and
the buffer is not read when `read_temporary_file` is
`1`.
This option defaults to `0` when `chain_with` is defined
as anything other than `v:null`, and defaults to `1`
otherwise. This is so earlier commands in a chain
do not receive the buffer's data by default.
*ale-fix-configuration*
Synchronous functions and asynchronous jobs will be run in a sequence for
fixing files, and can be combined. For example:
>
let g:ale_fixers = {
\ 'javascript': [
\ 'DoSomething',
\ 'eslint',
\ {buffer, lines -> filter(lines, 'v:val !=~ ''^\s*//''')},
\ ],
\}
ALEFix
<
The above example will call a function called `DoSomething` which could act
upon some lines immediately, then run `eslint` from the ALE registry, and
then call a lambda function which will remove every single line comment
from the file.
For buffer-local settings, such as in |g:ale_pattern_options| or in ftplugin
files, a |List| may be used for configuring the fixers instead.
>
" Same as the above, only a List can be used instead of a Dictionary.
let b:ale_fixers = [
\ 'DoSomething',
\ 'eslint',
\ {buffer, lines -> filter(lines, 'v:val !=~ ''^\s*//''')},
\]
ALEFix
<
For convenience, a plug mapping is defined for |ALEFix|, so you can set up a
keybind easily for fixing files. >
" Bind F8 to fixing problems with ALE
nmap <F8> <Plug>(ale_fix)
<
Files can be fixed automatically with the following options, which are all off
by default.
|g:ale_fix_on_save| - Fix files when they are saved.
===============================================================================
5. Language Server Protocol Support *ale-lsp*
ALE offers some support for integrating with Language Server Protocol (LSP)
servers. LSP linters can be used in combination with any other linter, and
will automatically connect to LSP servers when needed. ALE also supports
`tsserver` for TypeScript, which uses a different but very similar protocol.
ALE supports the following LSP/tsserver features.
1. Diagnostics/linting - Enabled via selecting linters as usual.
2. Completion (Only for tsserver)
3. Go to definition
-------------------------------------------------------------------------------
5.1 Completion *ale-completion*
NOTE: At the moment, only `tsserver` for TypeScript code is supported for
completion.
ALE offers limited support for automatic completion of code while you type.
Completion is only supported while a least one LSP linter is enabled. ALE
will only suggest symbols provided by the LSP servers.
Suggestions will be made while you type after completion is enabled.
Completion can be enabled by setting |g:ale_completion_enabled| to `1`. The
delay for completion can be configured with |g:ale_completion_delay|. ALE will
only suggest so many possible matches for completion. The maximum number of
items can be controlled with |g:ale_completion_max_suggestions|.
-------------------------------------------------------------------------------
5.2 Go To Definition *ale-go-to-definition*
ALE supports jumping to the files and locations where symbols are defined
through any enabled LSP linters. The locations ALE will jump to depend on the
information returned by LSP servers. The following commands are supported:
|ALEGoToDefinition| - Open the definition of the symbol under the cursor.
|ALEGoToDefinitionInTab| - The same, but for opening the file in a new tab.
-------------------------------------------------------------------------------
5.3 Find References *ale-find-references*
ALE supports finding references for symbols though any enabled LSP linters.
ALE will display a preview window showing the places where a symbol is
referenced in a codebase when a command is run. The following commands are
supported:
|ALEFindReferences| - Find references for the word under the cursor.
-------------------------------------------------------------------------------
5.4 Hovering *ale-hover*
ALE supports "hover" information for printing brief information about symbols
at the cursor taken from LSP linters. The following commands are supported:
|ALEHover| - Print information about the symbol at the cursor.
===============================================================================
6. Global Options *ale-options*
g:airline#extensions#ale#enabled *g:airline#extensions#ale#enabled*
Type: |Number|
Default: `1`
Enables or disables the |airline|'s native extension for ale, which displays
warnings and errors in the status line, prefixed by
|airline#extensions#ale#error_symbol| and
|airline#extensions#ale#warning_symbol|.
g:ale_cache_executable_check_failures *g:ale_cache_executable_check_failures*
Type: |Number|
Default: `0`
When set to `1`, ALE will cache failing executable checks for linters. By
default, only executable checks which succeed will be cached.
When this option is set to `1`, Vim will have to be restarted after new
executables are installed for ALE to be able to run linters for those
executables.
g:ale_change_sign_column_color *g:ale_change_sign_column_color*
Type: |Number|
Default: `0`
When set to `1`, this option will set different highlights for the sign
column itself when ALE reports problems with a file. This option can be
combined with |g:ale_sign_column_always|.
ALE uses the following highlight groups for highlighting the sign column:
`ALESignColumnWithErrors` - Links to `error` by default.
`ALESignColumnWithoutErrors` - Uses the value for `SignColumn` by default.
The sign column color can only be changed globally in Vim. The sign column
might produce unexpected results if editing different files in split
windows.
g:ale_command_wrapper *g:ale_command_wrapper*
*b:ale_command_wrapper*
Type: |String|
Default: `''`
An option for wrapping all commands that ALE runs, for linters, fixers,
and LSP commands. This option can be set globally, or for specific buffers.
This option can be used to apply nice to all commands. For example: >
" Prefix all commands with nice.
let g:ale_command_wrapper = 'nice -n5'
<
Use the |ALEInfo| command to view the commands that are run. All of the
arguments for commands will be put on the end of the wrapped command by
default. A `%*` marker can be used to spread the arguments in the wrapped
command. >
" Has the same effect as the above.
let g:ale_command_wrapper = 'nice -n5 %*'
<
For passing all of the arguments for a command as one argument to a wrapper,
`%@` can be used instead. >
" Will result in say: /bin/bash -c 'other-wrapper -c "some command" -x'
let g:ale_command_wrapper = 'other-wrapper -c %@ -x'
<
For commands including `&&` or `;`, only the last command in the list will
be passed to the wrapper. `&&` is most commonly used in ALE to change the
working directory before running a command.
g:ale_completion_delay *g:ale_completion_delay*
Type: |Number|
Default: `100`
The number of milliseconds before ALE will send a request to a language
server for completions after you have finished typing.
See |ale-completion|
g:ale_completion_enabled *g:ale_completion_enabled*
Type: |Number|
Default: `0`
When this option is set to `1`, completion support will be enabled.
See |ale-completion|
g:ale_completion_max_suggestions *g:ale_completion_max_suggestions*
Type: |Number|
Default: `50`
The maximum number of items ALE will suggest in completion menus for
automatic completion.
Setting this number higher will require more processing time, and may
suggest too much noise. Setting this number lower will require less
processing time, but some suggestions will not be included, so you might not
be able to see the suggestions you want.
Adjust this option as needed, depending on the complexity of your codebase
and your available processing power.
g:ale_echo_cursor *g:ale_echo_cursor*
Type: |Number|
Default: `1`
When this option is set to `1`, a truncated message will be echoed when a
cursor is near a warning or error. ALE will attempt to find the warning or
error at a column nearest to the cursor when the cursor is resting on a line
which contains a warning or error. This option can be set to `0` to disable
this behaviour.
The format of the message can be customizable in |g:ale_echo_msg_format|.
g:ale_echo_delay *g:ale_echo_delay*
*b:ale_echo_delay*
Type: |Number|
Default: `10`
Given any integer, this option controls the number of milliseconds before
ALE will echo a message for a problem near the cursor.
The value can be increased to decrease the amount of processing ALE will do
for files displaying a large number of problems.
g:ale_echo_msg_error_str *g:ale_echo_msg_error_str*
Type: |String|
Default: `'Error'`
The string used for `%severity%` for errors. See |g:ale_echo_msg_format|
g:ale_echo_msg_format *g:ale_echo_msg_format*
b:ale_echo_msg_format *b:ale_echo_msg_format*
Type: |String|
Default: `'%code: %%s'`
This variable defines a message format for echoed messages. The following
sequences of characters will be replaced.
`%s` - replaced with the text for the problem
`%...code...% `- replaced with the error code
`%linter%` - replaced with the name of the linter
`%severity%` - replaced withe severity of the problem
The strings for `%severity%` can be configured with the following options.
|g:ale_echo_msg_error_str| - Defaults to `'Error'`
|g:ale_echo_msg_info_str| - Defaults to `'Info'`
|g:ale_echo_msg_warning_str| - Defaults to `'Warning'`
`%code%` is replaced with the error code, and replaced with an empty string
when there is no error code. Any extra characters between the percent signs
will be printed when an error code is present. For example, a message like
`(error code): message` will be printed for `'%(code): %%s'` and simply the
message will be printed when there is no code.
|g:ale_echo_cursor| needs to be set to 1 for messages to be displayed.
The echo message format can also be configured separately for each buffer,
so different formats can be used for differnt languages. (Say in ftplugin
files.)
g:ale_echo_msg_info_str *g:ale_echo_msg_info_str*
Type: |String|
Default: `'Info'`
The string used for `%severity%` for info. See |g:ale_echo_msg_format|
g:ale_echo_msg_warning_str *g:ale_echo_msg_warning_str*
Type: |String|
Default: `'Warning'`
The string used for `%severity%` for warnings. See |g:ale_echo_msg_format|
g:ale_emit_conflict_warnings *g:ale_emit_conflict_warnings*
Type: |Number|
Default: `1`
When set to `0`, ALE will not emit any warnings on startup about conflicting
plugins. ALE will probably not work if other linting plugins are installed.
When this option is set to `1`, ALE will add its `after` directory to
|runtimepath| automatically, so the checks can be applied. Setting this
option to `0` before ALE is loaded will prevent ALE from modifying
|runtimepath|.
g:ale_enabled *g:ale_enabled*
*b:ale_enabled*
Type: |Number|
Default: `1`
When set to `0`, this option will completely disable ALE, such that no
error checking will be performed, etc. ALE can be toggled on and off with
the |ALEToggle| command, which changes this option.
ALE can be disabled in each buffer by setting `let b:ale_enabled = 0`
Disabling ALE based on filename patterns can be accomplished by setting
a regular expression for |g:ale_pattern_options|. For example: >
" Disable linting for all minified JS files.
let g:ale_pattern_options = {'\.min.js$': {'ale_enabled': 0}}
<
See |g:ale_pattern_options| for more information on that option.
g:ale_fixers *g:ale_fixers*
*b:ale_fixers*
Type: |Dictionary|
Default: `{}`
A mapping from filetypes to |List| values for functions for fixing errors.
See |ale-fix| for more information.
This variable can be overridden with variables in each buffer.
`b:ale_fixers` can be set to a |List| of callbacks instead, which can be
more convenient.
g:ale_fix_on_save *g:ale_fix_on_save*
b:ale_fix_on_save *b:ale_fix_on_save*
Type: |Number|
Default: `0`
When set to 1, ALE will fix files when they are saved.
If |g:ale_lint_on_save| is set to 1, files will be checked with linters
after files are fixed, only when the buffer is open, or re-opened. Changes
to the file will be saved to the file on disk.
Fixing files can be disabled or enabled for individual buffers by setting
`b:ale_fix_on_save` to `0` or `1`.
g:ale_history_enabled *g:ale_history_enabled*
Type: |Number|
Default: `1`
When set to `1`, ALE will remember the last few commands which were run
for every buffer which is open. This information can be viewed with the
|ALEInfo| command. The size of the buffer can be controlled with the
|g:ale_max_buffer_history_size| option.
This option can be disabled if storing a command history is not desired.
g:ale_history_log_output *g:ale_history_log_output*
Type: |Number|
Default: `1`
When set to `1`, ALE will store the output of commands which have completed
successfully in the command history, and the output will be displayed when
using |ALEInfo|.
|g:ale_history_enabled| must be set to `1` for this output to be stored or
printed.
Some memory will be consumed by this option. It is very useful for figuring
out what went wrong with linters, and for bug reports. Turn this option off
if you want to save on some memory usage.
g:ale_keep_list_window_open *g:ale_keep_list_window_open*
*b:ale_keep_list_window_open*
Type: |Number|
Default: `0`
When set to `1`, this option will keep the loclist or quickfix windows event
after all warnings/errors have been removed for files. By default the
loclist or quickfix windows will be closed automatically when there are no
warnings or errors.
See |g:ale_open_list|
g:ale_list_window_size *g:ale_list_window_size*
*b:ale_list_window_size*
Type: |Number|
Default: `10`
This number configures the number of lines to set for the height of windows
opened automatically for ALE problems. The default of `10` matches the Vim
default height.
See |g:ale_open_list| for information on automatically opening windows
for quickfix or the loclist.
g:ale_lint_delay *g:ale_lint_delay*
Type: |Number|
Default: `200`
This variable controls the milliseconds delay after which the linters will
be run after text is changed. This option is only meaningful with the
|g:ale_lint_on_text_changed| variable set to `always`, `insert`, or `normal`.
g:ale_lint_on_enter *g:ale_lint_on_enter*
Type: |Number|
Default: `1`