diagnostic language server
npm install diagnostic-languageserver> General purpose Language Server that integrate with
> linter to support diagnostic features
- diagnostic with linters
- document format
screenshot with neovim and coc
!image
`` bash`
yarn global add diagnostic-languageserver
> make sure your yarn's global bin path is include in PATH
> for example export PATH="$(yarn global bin):$PATH"
languageserver config:
` jsonc`
{
"languageserver": {
"dls": {
"command": "diagnostic-languageserver",
"args": ["--stdio", "--log-level", "2"],
"filetypes": [ "sh", "email" ], // filetypes that you want to enable this lsp
"initializationOptions": {
"linters": {
...
},
"filetypes": {
...
},
"formatters": {
...
},
"formatFiletypes": {
...
}
}
}
}
}
linters field:
`jsonc.gitignore
{
"linterName": { // linter name, for example: vint
"command": "shellcheck", // linter command
"rootPatterns": [], // root patterns, default empty array
"isStdout": true, // use stdout output, default true
"isStderr": false, // use stderr output, default false
"debounce": 100, // debounce time
"onSaveOnly": false, // linter is triggered only when file is saved
"args": [ "--format=gcc", "-"], // args
"offsetLine": 0, // offsetline
"offsetColumn": 0, // offsetColumn
"sourceName": "shellcheck", // source name
"ignore": [".git", "dist/"] // ignore pattern same as
// don't forget to add when using ignore
// it need workspace to filter
// Using regular expressions:
"formatLines": 1, // how much lines for formatPattern[0] to match
"formatPattern": [
"^([^:]+):(\\d+):(\\d+):\\s+([^:]+):\\s+(.*)$", // line match pattern (javascript regex)
{
"sourceName": 1, // diagnostic file use match group 1. Will default to the file being linted.
"sourceNameFilter": true, // Display diagnostics only for the current file.
// Only works when sourceName is defined and when it contains either an absolute
// or relative path to the file being linted. Defaults to false.
"line": 2, // diagnostic line use match group 2
"column": 3, // diagnostic column use match group 3
"endLine": 2, // diagnostic end line use match group 2. Will default to group from line
"endColumn": 3, // diagnostic end column use match group 3. Will default to group from
"message": [5], // message to display use match group 5
"security": 4 // security to use match group 4, ignore if linter do not support security
}
],
// Using JSON:
"parseJson": {
"errorsRoot": "[0].messages", // dot separated path. Will default to whatever JSON is output
// for more information see examples at https://lodash.com/docs/#get
// %filepath will be replaced with full path to the file (like in args)
// All of these support lodash.get syntax.
"sourceName": "file", // propert that contains the file. Will default to the file being linted.line
"sourceNameFilter": true, // Display diagnostics only for the current file.
// Only works when sourceName is defined and when it contains either an absolute
// or relative path to the file being linted. Defaults to false.
"line": "line", // property that contains the
"column": "column", // property that contains the
"endLine": "endLine", // property that contains the . Will default to line
"endColumn": "endColumn", // property that contains the . Will default to column
"security": "severity", // property that contains the
"message": "${message} [${code}]", // message to display
},
"securities": { // security keys, ignore if linter do not support security
"error": "error", // [key: string]?: "error" | "warning" | "info" | "hint"
"warning": "warning",
"note": "info"
},
"requiredFiles": [ // only run linter if any of these files exist. option
".shellcheckrc",
"shellcheckrc"
]
}
}
`
filetypes field:
`jsonc
{
"sh": "linterName", // filetype: linterName or linterName[]
"": "linterName" // is for all filetypes`
}
formatters field:
`jsonc%file
"dartfmt": { // formatter name
"command": "dartfmt", // format command
"args": [ "--fix" ], // args
"rootPatterns": [], // root patterns, default empty array
"isStdout": true, // use stdout output, default true
"isStderr": false, // use stderr output, default false
"doesWriteToFile": false, // use if formatter doesn't support stdio. should be paired with
"requiredFiles": [ // only run formatter if any of these files exist. optional
".run_dartfmt",
],
"ignoreExitCode": false, // ignore exit code. default false: exit code > 0 will not change the file.
// some formatter may exit with code > 0 so you need set it to true or number[]
// exit code array that you want to ignore.
"ignore": [".git", "dist/"] // ignore pattern same as
// don't forget to add when using ignore
// it need workspace to filter
}
formatFiletypes field:
`jsonc
{
"dart": "dartfmt", // filetype: formatterName or formatterName[]
"": "linterName" // is for all filetypes`
}
args: ["%text", "%filename", "%relativepath", "%file", "%filepath", "%dirname", "%tempfile"]
- %filename will replace with basename of file%text
- will replace with file content%file
- will replace with full path to the file and not use stdio%filepath
- will replace with full path to the file%relativepath
- will replace with relative path of file%dirname
- will replace with dirname of file%tempfile
- will replace with the full path to a temporary file written with the contents
of the document and not use stdio; this file will automatically be deleted when the
command completes
shellcheck for example:
file test.sh:
` sh
#!/usr/bin/env bash
echo ls -al
then:
`bash`
shellcheck --format=gcc test.sh
output:
`text...
t.sh:3:6: warning: Quote this to prevent word splitting. [SC2046]
t.sh:3:6: note: Useless echo? Instead of 'echo $(cmd)', just use 'cmd'. [SC2005]
t.sh:3:6: note: Use $(...) notation instead of legacy backticked . [SC2006]`
write pattern to match the line for line column message security:
`javascript`
const line = "t.sh:3:6: warning: Quote this to prevent word splitting. [SC2046]"
const formatPattern = "^[^:]+:(\\d+):(\\d+):\\s+([^:]+):\\s+(.*)$"
const match = line.match(new RegExp(formatPattern))
console.log(match)
output:
` jsonc`
{
0: "t.sh:3:6: warning: Quote this to prevent word splitting. [SC2046]"
1: "3"
2: "6"
3: "warning"
4: "Quote this to prevent word splitting. [SC2046]"
}
so you got:
- line: match[1]
- : match[2]
- : match[4]
- : match[3]
and your formatPattern field will be:
`jsonc`
"formatPattern": [
"^[^:]+:(\\d+):(\\d+):\\s+([^:]+):\\s+(.*)$", // line match pattern (javascript regex)
{
"line": 1, // diagnostic line use match group 1
"column": 2, // diagnostic column use match group 2
"message": [4], // message to display use match group 4
"security": 3 // security to use match group 3, ignore if linter do not support security
}
]
> Notes
> if the linter's message for per issue more then one line, you have to set the formatLines to fill your pattern,formatLines = 2
> and you can view the languagetool pattern for example which
> Each LSP client should support initializationOptions option,diagnostic-languageserver
> all you need for is put the config in initializationOptions option.
1. shellcheck for shell
2. languagetool for grammer check
3. more Linters config example.
coc-settings.json:
> you can use this extension https://github.com/iamcco/coc-diagnostic
` jsonc``
{
"languageserver": {
"dls": {
"command": "diagnostic-languageserver",
"args": ["--stdio"],
"filetypes": [ "sh", "email", "dart" ],
"initializationOptions": {
"linters": {
"shellcheck": {
"command": "shellcheck",
"debounce": 100,
"args": [ "--format=gcc", "-"],
"offsetLine": 0,
"offsetColumn": 0,
"sourceName": "shellcheck",
"formatLines": 1,
"formatPattern": [
"^[^:]+:(\\d+):(\\d+):\\s+([^:]+):\\s+(.*)$",
{
"line": 1,
"column": 2,
"message": 4,
"security": 3
}
],
"securities": {
"error": "error",
"warning": "warning",
"note": "info"
}
},
"languagetool": {
"command": "languagetool",
"debounce": 200,
"args": ["-"],
"offsetLine": 0,
"offsetColumn": 0,
"sourceName": "languagetool",
"formatLines": 2,
"formatPattern": [
"^\\d+?\\.\\)\\s+Line\\s+(\\d+),\\s+column\\s+(\\d+),\\s+([^\\n]+)\nMessage:\\s+(.*)$",
{
"line": 1,
"column": 2,
"message": [4, 3]
}
],
}
},
"formatters": {
"dartfmt": {
"command": "dartfmt",
"args": [ "--fix" ],
}
},
"filetypes": {
"sh": "shellcheck",
"email": "languagetool"
},
"formatFiletypes": {
"dart": "dartfmt"
}
}
}
}
}
- [x] local node_modules linter support like eslint or textlint
- [x] diagnostic severity
- [x] root pattern
- [x] document format
- inspired by efm-langserver
!btc