title	description
cljstyle configuration in MegaLinter	How to use cljstyle (configure, ignore files, ignore errors, help & version documentations) to analyze CLOJURE files

cljstyle

cljstyle is a comprehensive tool for formatting Clojure code that transforms messy, inconsistent code into beautifully formatted, readable source files. It's a rewrite of the original cljfmt tool with enhanced capabilities and native compilation.

Key Features:

Automatic Code Formatting: Transforms poorly formatted Clojure code into clean, consistent, and readable format
Comprehensive Rules: Handles indentation, spacing, line breaks, namespace formatting, and function definitions
Highly Configurable: Extensive configuration options through .cljstyle files with format rules and width constraints
Multi-Command Interface: Supports check, fix, pipe, find, and config commands for different workflows
Form Ignoring: Flexible ignore patterns with comment forms, discard macros, and metadata tags
Native Performance: Compiled to native binary for fast startup and execution

cljstyle documentation

Version in MegaLinter: 0.17.642
Visit Official Web Site{target=_blank}
See How to configure cljstyle rules{target=_blank}
See How to disable cljstyle rules in files{target=_blank}
See Index of problems detected by cljstyle{target=_blank}

{target=_blank}

Configuration in MegaLinter

Enable cljstyle by adding CLOJURE_CLJSTYLE in ENABLE_LINTERS variable
Disable cljstyle by adding CLOJURE_CLJSTYLE in DISABLE_LINTERS variable
Enable autofixes by adding CLOJURE_CLJSTYLE in APPLY_FIXES variable

Variable	Description	Default value
CLOJURE_CLJSTYLE_ARGUMENTS	User custom arguments to add in linter CLI call Ex: `-s --foo "bar"`
CLOJURE_CLJSTYLE_COMMAND_REMOVE_ARGUMENTS	User custom arguments to remove from command line before calling the linter Ex: `-s --foo "bar"`
CLOJURE_CLJSTYLE_FILTER_REGEX_INCLUDE	Custom regex including filter Ex: `(src\|lib)`	Include every file
CLOJURE_CLJSTYLE_FILTER_REGEX_EXCLUDE	Custom regex excluding filter Ex: `(test\|examples)`	Exclude no file
CLOJURE_CLJSTYLE_CLI_LINT_MODE	Override default CLI lint mode - `file`: Calls the linter for each file - `project`: Call the linter from the root of the project	`file`
CLOJURE_CLJSTYLE_FILE_EXTENSIONS	Allowed file extensions. `"*"` matches any extension, `""` matches empty extension. Empty list excludes all files Ex: `[".py", ""]`	`[".clj", ".cljs", ".cljc", ".edn"]`
CLOJURE_CLJSTYLE_FILE_NAMES_REGEX	File name regex filters. Regular expression list for filtering files by their base names using regex full match. Empty list includes all files Ex: `["Dockerfile(-.+)?", "Jenkinsfile"]`	Include every file
CLOJURE_CLJSTYLE_PRE_COMMANDS	List of bash commands to run before the linter	None
CLOJURE_CLJSTYLE_POST_COMMANDS	List of bash commands to run after the linter	None
CLOJURE_CLJSTYLE_UNSECURED_ENV_VARIABLES	List of env variables explicitly not filtered before calling CLOJURE_CLJSTYLE and its pre/post commands	None
CLOJURE_CLJSTYLE_CONFIG_FILE	cljstyle configuration file name Use `LINTER_DEFAULT` to let the linter find it	`.cljstyle`
CLOJURE_CLJSTYLE_RULES_PATH	Path where to find linter configuration file	Workspace folder, then MegaLinter default rules
CLOJURE_CLJSTYLE_DISABLE_ERRORS	Run linter but consider errors as warnings	`false`
CLOJURE_CLJSTYLE_DISABLE_ERRORS_IF_LESS_THAN	Maximum number of errors allowed	`0`
CLOJURE_CLJSTYLE_CLI_EXECUTABLE	Override CLI executable	`['cljstyle']`

IDE Integration

Use cljstyle in your favorite IDE to catch errors before MegaLinter !

	IDE	Extension Name	Install
	Emacs	cljstyle-mode	Visit Web Site{target=_blank}

MegaLinter Flavors

This linter is available in the following flavors

Flavor	Description	Embedded linters
all	Default MegaLinter Flavor	127
cupcake	MegaLinter for the most commonly used languages	88
java	Optimized for JAVA based projects	54

Behind the scenes

How are identified applicable files

File extensions: .clj, .cljs, .cljc, .edn

How the linting is performed

cljstyle is called one time by identified file (file CLI lint mode)

Example calls

cljstyle check

cljstyle fix

cljstyle fix myfile.clj path/to/myfile.clj

Help content

Usage: cljstyle [options] <command> [args...]

Commands:
    find      Find files which would be processed.
    check     Check source files and print a diff for errors.
    fix       Edit source files to fix formatting errors.
    pipe      Fixes formatting errors from stdin and pipes the results to stdout.
    config    Show config used for a given path.
    migrate   Migrate legacy configuration files.
    version   Print program version information.

Options:
      --ignore PATTERN       Ignore files matching the given pattern. May be set multiple times.
      --timeout SEC     300  Maximum time to allow the process to run for.
      --timeout-trace        Dump thread stack traces when the tool times out.
      --stats FILE           Write formatting stats to the named file. The extension controls the format and may be either 'edn' or 'tsv'.
      --report               Print stats report at the end of a run.
      --report-timing        Print detailed rule timings at the end of a run.
      --no-color             Don't output ANSI color codes.
  -v, --verbose              Print detailed debugging output.
  -h, --help                 Show help and usage information.

Installation on mega-linter Docker image

Dockerfile commands :

# Parent descriptor install
# renovate: datasource=github-tags depName=sgerrand/alpine-pkg-glibc
ARG ALPINE_GLIBC_PACKAGE_VERSION=2.34-r0
ENV LANG=C.UTF-8
RUN ALPINE_GLIBC_BASE_URL="https://github.com/sgerrand/alpine-pkg-glibc/releases/download" && \
    ALPINE_GLIBC_BASE_PACKAGE_FILENAME="glibc-$ALPINE_GLIBC_PACKAGE_VERSION.apk" && \
    ALPINE_GLIBC_BIN_PACKAGE_FILENAME="glibc-bin-$ALPINE_GLIBC_PACKAGE_VERSION.apk" && \
    ALPINE_GLIBC_I18N_PACKAGE_FILENAME="glibc-i18n-$ALPINE_GLIBC_PACKAGE_VERSION.apk" && \
    apk add --no-cache --virtual=.build-dependencies wget ca-certificates && \
    echo \
        "-----BEGIN PUBLIC KEY-----\
        MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEApZ2u1KJKUu/fW4A25y9m\
        y70AGEa/J3Wi5ibNVGNn1gT1r0VfgeWd0pUybS4UmcHdiNzxJPgoWQhV2SSW1JYu\
        tOqKZF5QSN6X937PTUpNBjUvLtTQ1ve1fp39uf/lEXPpFpOPL88LKnDBgbh7wkCp\
        m2KzLVGChf83MS0ShL6G9EQIAUxLm99VpgRjwqTQ/KfzGtpke1wqws4au0Ab4qPY\
        KXvMLSPLUp7cfulWvhmZSegr5AdhNw5KNizPqCJT8ZrGvgHypXyiFvvAH5YRtSsc\
        Zvo9GI2e2MaZyo9/lvb+LbLEJZKEQckqRj4P26gmASrZEPStwc+yqy1ShHLA0j6m\
        1QIDAQAB\
        -----END PUBLIC KEY-----" | sed 's/   */\\n/g' > "/etc/apk/keys/sgerrand.rsa.pub" && \
    wget --quiet --tries=10 --waitretry=10 \
        "$ALPINE_GLIBC_BASE_URL/$ALPINE_GLIBC_PACKAGE_VERSION/$ALPINE_GLIBC_BASE_PACKAGE_FILENAME" \
        "$ALPINE_GLIBC_BASE_URL/$ALPINE_GLIBC_PACKAGE_VERSION/$ALPINE_GLIBC_BIN_PACKAGE_FILENAME" \
        "$ALPINE_GLIBC_BASE_URL/$ALPINE_GLIBC_PACKAGE_VERSION/$ALPINE_GLIBC_I18N_PACKAGE_FILENAME" && \
    mv /etc/nsswitch.conf /etc/nsswitch.conf.bak && \
    apk add --no-cache --force-overwrite \
        "$ALPINE_GLIBC_BASE_PACKAGE_FILENAME" \
        "$ALPINE_GLIBC_BIN_PACKAGE_FILENAME" \
        "$ALPINE_GLIBC_I18N_PACKAGE_FILENAME" && \
    \
    mv /etc/nsswitch.conf.bak /etc/nsswitch.conf && \
    rm "/etc/apk/keys/sgerrand.rsa.pub" && \
    (/usr/glibc-compat/bin/localedef --force --inputfile POSIX --charmap UTF-8 "$LANG" || true) && \
    echo "export LANG=$LANG" > /etc/profile.d/locale.sh && \
    \
    apk del glibc-i18n && \
    \
    rm "/root/.wget-hsts" && \
    apk del .build-dependencies && \
    rm \
        "$ALPINE_GLIBC_BASE_PACKAGE_FILENAME" \
        "$ALPINE_GLIBC_BIN_PACKAGE_FILENAME" \
        "$ALPINE_GLIBC_I18N_PACKAGE_FILENAME"

# Linter install
# renovate: datasource=github-tags depName=greglook/cljstyle
ARG CLJ_STYLE_VERSION=0.17.642
RUN curl --retry 5 --retry-delay 5 -sLO https://raw.githubusercontent.com/greglook/cljstyle/main/util/install-cljstyle \
    && chmod +x install-cljstyle \
    && ./install-cljstyle --static --version "$CLJ_STYLE_VERSION"

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