cspell

A Spell Checker for Code!

cspell is a command line tool and library for spell checking code.

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Features

Spell Checks Code -- Able to spell check code by parsing it into words before checking against the dictionaries.
- Supports CamelCase, snake_case, and compoundwords naming styles.
Self contained -- does not depend upon OS libraries like Hunspell or aspell. Nor does it depend upon online services.
Fast -- checks 1000's of lines of code in seconds.
Programming Language Specific Dictionaries -- Has dedicated support for:
- JavaScript, TypeScript, Python, PHP, C#, C++, LaTex, Go, HTML, CSS, etc.
Customizable -- supports custom dictionaries and word lists.
Continuous Integration Support -- Can easily be added as a linter to Travis-CI.

cspell was initially built as the spell checking service for the spell checker extension for Visual Studio Code.

cspell for enterprise

Available as part of the Tidelift Subscription.

The maintainers of cspell and thousands of other packages are working with Tidelift to deliver commercial support and maintenance for the open source packages you use to build your applications. Save time, reduce risk, and improve code health, while paying the maintainers of the exact packages you use. Learn more.

Installation

npm install -g cspell

Basic Usage

Example: recursively spell check all JavaScript files in src

JavaScript files

cspell "src/**/*.js"
# or
cspell lint "src/**/*.js"

Check everything

cspell "**"

Git: Check Only Changed Files

 git diff --name-only | npx cspell --file-list stdin

Command: `lint` -- Spell Checking

The lint command is used for spell checking files.

Help

cspell lint --help

Options

Usage: cspell lint [options] [globs...]

Check spelling

Options:
  -c, --config <cspell.json>   Configuration file to use.  By default cspell
                               looks for cspell.json in the current directory.

  -v, --verbose                Display more information about the files being
                               checked and the configuration.

  --locale <locale>            Set language locales. i.e. "en,fr" for English
                               and French, or "en-GB" for British English.

  --language-id <language>     Force programming language for unknown
                               extensions. i.e. "php" or "scala"

  --words-only                 Only output the words not found in the
                               dictionaries.

  -u, --unique                 Only output the first instance of a word not
                               found in the dictionaries.

  -e, --exclude <glob>         Exclude files matching the glob pattern. This
                               option can be used multiple times to add
                               multiple globs.

  --file-list <path or stdin>  Specify a list of files to be spell checked. The
                               list is filtered against the glob file patterns.
                               Note: the format is 1 file path per line.

  --no-issues                  Do not show the spelling errors.
  --no-progress                Turn off progress messages
  --no-summary                 Turn off summary message in console.
  -s, --silent                 Silent mode, suppress error messages.
  -r, --root <root folder>     Root directory, defaults to current directory.
  --relative                   Issues are displayed relative to root.
  --show-context               Show the surrounding text around an issue.
  --show-suggestions           Show spelling suggestions.
  --no-must-find-files         Do not error if no files are found.

  --cache                      Use cache to only check changed files.
  --no-cache                   Do not use cache.
  --cache-strategy <strategy>  Strategy to use for detecting changed files.
                               (choices: "metadata", "content")

  --cache-location <path>      Path to the cache file or directory. (default:
                               ".cspellcache")

  --dot                        Include files and directories starting with `.`
                               (period) when matching globs.

  --gitignore                  Ignore files matching glob patterns found in
                               .gitignore files.

  --no-gitignore               Do NOT use .gitignore files.

  --gitignore-root <path>      Prevent searching for .gitignore files past
                               root.

  --no-color                   Turn off color.
  --color                      Force color.
  --debug                      Output information useful for debugging
                               cspell.json files.
  -h, --help                   display help for command


Examples:
    cspell "*.js"                   Check all .js files in the current directory
    cspell "**/*.js"                Check all .js files from the current directory
    cspell "src/**/*.js"            Only check .js under src
    cspell "**/*.txt" "**/*.js"     Check both .js and .txt files.
    cspell "**/*.{txt,js,md}"       Check .txt, .js, and .md files.
    cat LICENSE | cspell stdin      Check stdin

Command: `check` - Quick Visual Check

Do a quick visual check of a file. This is a great way to see which text is included in the check.

cspell check <filename>

It will produce something like this:

Tip for use with `less`

To get color in less, use --color and less -r

cspell check <filename> --color | less -r

Command: `trace` - See which dictionaries contain a word

Trace shows a the list of known dictionaries and a * next to the ones that contain the word.

A ! will appear next to the ones where the word is forbidden.

CI/CD Continuous Integration support

Mega-Linter

Mega-Linter aggregates 70 linters ready to use out of the box, including cspell

Can run as a GitHub Action, on other CI tools and locally
Provides an updated .cspell.json file with new unknown words

Setup

Quick setup following installation guide in Mega-Linter documentation

Git commit-hooks

pre-commit

Setup

npm install -SD cspell

.git/hooks/pre-commit

#!/bin/sh

exec git diff --cached --name-only | npx cspell -- --no-summary --no-progress --no-must-find-files --file-list stdin

Requirements

cspell needs Node 12 and above.

How it works

The concept is simple, split camelCase and snake_case words before checking them against a list of known words.

camelCase -> camel case
HTMLInput -> html input
srcCode -> src code
snake_case_words -> snake case words
camel2snake -> camel snake -- (the 2 is ignored)
function parseJson(text: string) -> function parse json text string

Special cases

Escape characters like \n, \t are removed if the word does not match:
- \narrow -> narrow - because narrow is a word
- \ncode -> code - because ncode is not a word.
- \network -> network - but it might be hiding a spelling error, if \n was an escape character.

Things to note

This spellchecker is case insensitive. It will not catch errors like english which should be English.
The spellchecker uses dictionaries stored locally. It does not send anything outside your machine.
The words in the dictionaries can and do contain errors.
There are missing words.
Only words longer than 3 characters are checked. "jsj" is ok, while "jsja" is not.
All symbols and punctuation are ignored.

In Document Settings

It is possible to add spell check settings into your source code. This is to help with file specific issues that may not be applicable to the entire project.

All settings are prefixed with cSpell: or spell-checker:.

disable -- turn off the spell checker for a section of code.
enable -- turn the spell checker back on after it has been turned off.
ignore -- specify a list of words to be ignored.
words -- specify a list of words to be considered correct and will appear in the suggestions list.
ignoreRegExp -- Any text matching the regular expression will NOT be checked for spelling.
includeRegExp -- Only text matching the collection of includeRegExp will be checked.
enableCompoundWords / disableCompoundWords -- Allow / disallow words like: "stringlength".
dictionaries -- specify a list of the names of the dictionaries to use.

Enable / Disable checking sections of code

It is possible to disable / enable the spell checker by adding comments to your code.

Disable Checking

/* cSpell:disable */
/* spell-checker: disable */
/* spellchecker: disable */
// cspell:disable-line -- disables checking for the current line.
/* cspell:disable-next-line */ -- disables checking till the end of the next line.

Enable Checking

/* cSpell:enable */
/* spell-checker: enable */
/* spellchecker: enable */

Example

// cSpell:disable
const wackyWord = ['zaallano', 'wooorrdd', 'zzooommmmmmmm'];
/* cSpell:enable */

const words = ['zaallano', 'wooorrdd', 'zzooommmmmmmm']; // cspell:disable-line disables this entire line

// To disable the next line, use cspell:disable-next-line
const moreWords = ['ieeees', 'beees', 'treeees'];

// Nesting disable / enable is not Supported

// spell-checker:disable
// It is now disabled.

var liep = 1;

/* cspell:disable */
// It is still disabled

// cSpell:enable
// It is now enabled

const str = 'goededag'; // <- will be flagged as an error.

// spell-checker:enable <- doesn't do anything

// cSPELL:DISABLE <-- also works.

// if there isn't an enable, spelling is disabled till the end of the file.
const str = 'goedemorgen'; // <- will NOT be flagged as an error.

Ignore

Ignore allows you the specify a list of words you want to ignore within the document.

// cSpell:ignore zaallano, wooorrdd
// cSpell:ignore zzooommmmmmmm
const wackyWord = ['zaallano', 'wooorrdd', 'zzooommmmmmmm'];

Note: words defined with ignore will be ignored for the entire file.

Words

The words list allows you to add words that will be considered correct and will be used as suggestions.

// cSpell:words woorxs sweeetbeat
const companyName = 'woorxs sweeetbeat';

Note: words defined with words will be used for the entire file.

Enable / Disable compound words

In some programing language it is common to glue words together.

// cSpell:enableCompoundWords
char * errormessage;  // Is ok with cSpell:enableCompoundWords
int    errornumber;   // Is also ok.

Note: Compound word checking cannot be turned on / off in the same file. The last setting in the file determines the value for the entire file.

Excluding and Including Text to be checked.

By default, the entire document is checked for spelling. cSpell:disable/cSpell:enable above allows you to block off sections of the document. ignoreRegExp and includeRegExp give you the ability to ignore or include patterns of text. By default the flags gim are added if no flags are given.

The spell checker works in the following way:

Find all text matching includeRegExp
Remove any text matching ignoreRegExp
Check the remaining text.

Exclude Example

// cSpell:ignoreRegExp 0x[0-9a-f]+     -- will ignore c style hex numbers
// cSpell:ignoreRegExp /0x[0-9A-F]+/g  -- will ignore upper case c style hex numbers.
// cSpell:ignoreRegExp g{5} h{5}       -- will only match ggggg, but not hhhhh or 'ggggg hhhhh'
// cSpell:ignoreRegExp g{5}|h{5}       -- will match both ggggg and hhhhh
// cSpell:ignoreRegExp /g{5} h{5}/     -- will match 'ggggg hhhhh'
/* cSpell:ignoreRegExp /n{5}/          -- will NOT work as expected because of the ending comment -> */
/*
   cSpell:ignoreRegExp /q{5}/          -- will match qqqqq just fine but NOT QQQQQ
*/
// cSpell:ignoreRegExp /[^\s]{40,}/    -- will ignore long strings with no spaces.
// cSpell:ignoreRegExp Email           -- this will ignore email like patterns -- see Predefined RegExp expressions
var encodedImage = 'HR+cPzr7XGAOJNurPL0G8I2kU0UhKcqFssoKvFTR7z0T3VJfK37vS025uKroHfJ9nA6WWbHZ/ASn...';
var email1 = 'emailaddress@myfancynewcompany.com';
var email2 = '<emailaddress@myfancynewcompany.com>';

Note: ignoreRegExp and includeRegExp are applied to the entire file. They do not start and stop.

Include Example

In general you should not need to use includeRegExp. But if you are mixing languages then it could come in helpful.

# cSpell:includeRegExp #.*
# cSpell:includeRegExp ("""|''')[^\1]*\1
# only comments and block strings will be checked for spelling.
def sum_it(self, seq):
    """This is checked for spelling"""
    variabele = 0
    alinea = 'this is not checked'
    for num in seq:
        # The local state of 'value' will be retained between iterations
        variabele += num
        yield variabele

Dictionaries

The dictionaries list allows you to specify dictionaries to use for the file.

// cSpell:dictionaries lorem-ipsum
const companyName = 'Lorem ipsum dolor sit amet';

Note: dictionaries specified with dictionaries will be used for the entire file.

Predefined RegExp expressions

Exclude patterns

Urls¹ -- Matches urls
HexValues -- Matches common hex format like #aaa, 0xfeef, \u0134
Base64¹ -- matches base64 blocks of text longer than 40 characters.
Email -- matches most email addresses.

Include Patterns

Everything¹ -- By default we match an entire document and remove the excludes.
string -- This matches common string formats like '...', "...", and `...`
CStyleComment -- These are C Style comments /* */ and //
PhpHereDoc -- This matches PHPHereDoc strings.

^1. These patterns are part of the default include/exclude list for every file.

Customization

cspell's behavior can be controlled through a config file. By default it looks for any of the following files:

.cspell.json
cspell.json
.cSpell.json
cSpell.json
cspell.config.js
cspell.config.cjs
cspell.config.json
cspell.config.yaml
cspell.config.yml
cspell.yaml
cspell.yml

Or you can specify a path to a config file with the --config <path> argument on the command line.

`cspell.json`

Example `cspell.json` file

// cSpell Settings
{
    // Version of the setting file.  Always 0.2
    "version": "0.2",
    // language - current active spelling language
    "language": "en",
    // words - list of words to be always considered correct
    "words": [
        "mkdirp",
        "tsmerge",
        "githubusercontent",
        "streetsidesoftware",
        "vsmarketplacebadge",
        "visualstudio"
    ],
    // flagWords - list of words to be always considered incorrect
    // This is useful for offensive words and common spelling errors.
    // For example "hte" should be "the"
    "flagWords": [
        "hte"
    ]
}

cspell.json sections

version - currently always 0.2 - controls how the settings in the configuration file behave.
language - this specifies the language locale to use in choosing the general dictionary. For example: "language": "en-GB" tells cspell to use British English instead of US English.
words - a list of words to be considered correct.
flagWords - a list of words to be always considered incorrect
ignoreWords - a list of words to be ignored (even if they are in the flagWords).
ignorePaths - a list of globs to specify which files are to be ignored.

Example
```
"ignorePaths": ["node_modules/**"]
```
will cause cspell to ignore anything in the node_modules directory.
maxNumberOfProblems - defaults to 100 per file.
minWordLength - defaults to 4 - the minimum length of a word before it is checked.
allowCompoundWords - defaults to false; set to true to allow compound words by default.
dictionaries - list of the names of the dictionaries to use. See Dictionaries below.

dictionaryDefinitions - this list defines any custom dictionaries to use. This is how you can include other languages like Spanish.

Example

"language": "en",
// Dictionaries "spanish", "ruby", and "corp-term" will always be checked.
// Including "spanish" in the list of dictionaries means both Spanish and English
// words will be considered correct.
"dictionaries": ["spanish", "ruby", "corp-terms", "fonts"],
// Define each dictionary.  Relative paths are relative to the config file.
"dictionaryDefinitions": [
    { "name": "spanish", "path": "./spanish-words.txt"},
    { "name": "ruby", "path": "./ruby.txt"},
    { "name": "company-terms", "path": "./corp-terms.txt"}
],

ignoreRegExpList - list of patterns to be ignored
includeRegExpList - (Advanced) limits the text checked to be only that matching the expressions in the list.
patterns - this allows you to define named patterns to be used with ignoreRegExpList and includeRegExpList.
languageSettings - this allow for per programming language configuration settings. See LanguageSettings

Dictionaries

The spell checker includes a set of default dictionaries.

General Dictionaries

en_US - Derived from Hunspell US English words.
en-gb - Derived from Hunspell GB English words.
companies - List of well known companies
softwareTerms - Software Terms and concepts like "coroutine", "debounce", "tree", etc.
misc - Terms that do not belong in the other dictionaries.

Programming Language Dictionaries

typescript - keywords for TypeScript and JavaScript
node - terms related to using nodejs.
php - php keywords and library methods
go - go keywords and library methods
python - python keywords
powershell - powershell keywords
html - html related keywords
css - css, less, and scss related keywords
cpp - C++ related keywords
csharp - C# related keywords
latex - LaTex related words
bash - Bash/shell script keywords

Miscellaneous Dictionaries

fonts - long list of fonts - to assist with css
filetypes - list of file typescript
npm - list of top 500+ package names on npm.

Dictionary Definition

name - The reference name of the dictionary, used with program language settings
description - Optional description
path - Path to the file, can be relative or absolute. Relative path is relative to the current cspell.json file.
repMap - Optional replacement map use to replace character prior to searching the dictionary. Example:
```
    // Replace various tick marks with a single '
    "repMap": [["'|`|’", "'"]]
```
// Use Compounds
useCompounds - allow compound words

// Define each dictionary.  Relative paths are relative to the config file.
"dictionaryDefinitions": [
    { "name": "spanish", "path": "./spanish-words.txt"},
    { "name": "ruby", "path": "./ruby.txt"},
    { "name": "company-terms", "path": "./corp-terms.txt"}
],

Disabling a Dictionary

It is possible to prevent a dictionary from being loaded. This is useful if you want to use your own dictionary or just turn off an existing dictionary.

Disable Default cpp Dictionary

"dictionaries": ["!cpp"],
"overrides": [
  {
      "filename": "legacy/**/*.cpp",
      "dictionaries": ["!!cpp"], // add it back for *.cpp files under the legacy folder
  },
]

The number of !s is important.

!cpp remove cpp dictionary
!!cpp add it back
!!!cpp remove it again.

LanguageSettings

The Language Settings allow configuration to be based upon the programming language and/or the e. There are two selector fields locale and languageId.

languageId defines which programming languages to match against. A value of "python,javascript" will match against python and javascript files. To match against ALL programming languages, use "*".
locale defines which spoken languages to match against. A value of "en-GB,nl" will match against British English or Dutch. A value of "*" will match all spoken languages.
Most configuration values allowed in a cspell.json file can be define or redefine within the languageSettings.

    "languageSettings": [
        {
            // VSCode languageId. i.e. typescript, java, go, cpp, javascript, markdown, latex
            // * will match against any file type.
            "languageId": "c,cpp",
            // Language locale. i.e. en-US, de-AT, or ru. * will match all locales.
            // Multiple locales can be specified like: "en, en-US" to match both English and English US.
            "locale": "*",
            // To exclude patterns, add them to "ignoreRegExpList"
            "ignoreRegExpList": [
                "/#include.*/"
            ],
            // List of dictionaries to enable by name in `dictionaryDefinitions`
            "dictionaries": ["cpp"],
            // Dictionary definitions can also be supplied here. They are only used iff "languageId" and "locale" match.
            "dictionaryDefinitions": []
        }
    ]

Overrides

Overrides are useful for forcing configuration on a per file basis.

Example:

    "overrides": [
        // Force `*.hrr` and `*.crr` files to be treated as `cpp` files:
        {
            "filename": "**/{*.hrr,*.crr}",
            "languageId": "cpp"
        },
        // Force `*.txt` to use the Dutch dictionary (Dutch dictionary needs to be installed separately):
        {
            "language": "nl",
            "filename": "**/dutch/**/*.txt"
        }
    ]

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cspell

Support Future Development

Features

cspell for enterprise

Installation

Basic Usage

Command: lint -- Spell Checking

Help

Options

Command: check - Quick Visual Check

Tip for use with less

Command: trace - See which dictionaries contain a word

CI/CD Continuous Integration support

Mega-Linter

Git commit-hooks

pre-commit

Requirements

How it works

Special cases

Things to note

In Document Settings

Enable / Disable checking sections of code

Disable Checking

Enable Checking

Example

Ignore

Words

Enable / Disable compound words

Excluding and Including Text to be checked.

Exclude Example

Include Example

Dictionaries

Predefined RegExp expressions

Exclude patterns

Include Patterns

Customization

cspell.json

Example cspell.json file

cspell.json sections

Dictionaries

General Dictionaries

Programming Language Dictionaries

Miscellaneous Dictionaries

Dictionary Definition

Disabling a Dictionary

Disable Default cpp Dictionary

LanguageSettings

Overrides

Current Tags

254 Versions

Command: `lint` -- Spell Checking

Command: `check` - Quick Visual Check

Tip for use with `less`

Command: `trace` - See which dictionaries contain a word

`cspell.json`

Example `cspell.json` file