shellcheck
shellcheck documentation
- Version in MegaLinter: 0.9.0
- Visit Official Web Site
- See How to disable shellcheck rules in files
- See Index of problems detected by shellcheck
Configuration in MegaLinter
- Enable shellcheck by adding
BASH_SHELLCHECK
in ENABLE_LINTERS variable - Disable shellcheck by adding
BASH_SHELLCHECK
in DISABLE_LINTERS variable
Variable | Description | Default value |
---|---|---|
BASH_SHELLCHECK_ARGUMENTS | User custom arguments to add in linter CLI call Ex: -s --foo "bar" |
|
BASH_SHELLCHECK_COMMAND_REMOVE_ARGUMENTS | User custom arguments to remove from command line before calling the linter Ex: -s --foo "bar" |
|
BASH_SHELLCHECK_FILTER_REGEX_INCLUDE | Custom regex including filter Ex: (src\|lib) |
Include every file |
BASH_SHELLCHECK_FILTER_REGEX_EXCLUDE | Custom regex excluding filter Ex: (test\|examples) |
Exclude no file |
BASH_SHELLCHECK_CLI_LINT_MODE | Override default CLI lint mode - file : Calls the linter for each file- list_of_files : Call the linter with the list of files as argument- project : Call the linter from the root of the project |
list_of_files |
BASH_SHELLCHECK_FILE_EXTENSIONS | Allowed file extensions. "*" matches any extension, "" matches empty extension. Empty list excludes all filesEx: [".py", ""] |
[".sh", ".bash", ".dash", ".ksh"] |
BASH_SHELLCHECK_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 |
BASH_SHELLCHECK_PRE_COMMANDS | List of bash commands to run before the linter | None |
BASH_SHELLCHECK_POST_COMMANDS | List of bash commands to run after the linter | None |
BASH_SHELLCHECK_UNSECURED_ENV_VARIABLES | List of env variables explicitly not filtered before calling BASH_SHELLCHECK and its pre/post commands | None |
BASH_SHELLCHECK_DISABLE_ERRORS | Run linter but consider errors as warnings | false |
BASH_SHELLCHECK_DISABLE_ERRORS_IF_LESS_THAN | Maximum number of errors allowed | 0 |
BASH_SHELLCHECK_CLI_EXECUTABLE | Override CLI executable | ['shellcheck'] |
IDE Integration
Use shellcheck in your favorite IDE to catch errors before MegaLinter !
MegaLinter Flavours
This linter is available in the following flavours
Flavor | Description | Embedded linters | Info | |
---|---|---|---|---|
![]() |
all | Default MegaLinter Flavor | 118 | |
c_cpp | Optimized for pure C/C++ projects | 53 | ||
ci_light | Optimized for CI items (Dockerfile, Jenkinsfile, JSON/YAML schemas,XML | 22 | ||
cupcake | MegaLinter for the most commonly used languages | 85 | ||
documentation | MegaLinter for documentation projects | 51 | ||
dotnet | Optimized for C, C++, C# or VB based projects | 63 | ||
dotnetweb | Optimized for C, C++, C# or VB based projects with JS/TS | 72 | ||
go | Optimized for GO based projects | 53 | ||
java | Optimized for JAVA based projects | 55 | ||
javascript | Optimized for JAVASCRIPT or TYPESCRIPT based projects | 60 | ||
php | Optimized for PHP based projects | 54 | ||
python | Optimized for PYTHON based projects | 62 | ||
ruby | Optimized for RUBY based projects | 51 | ||
rust | Optimized for RUST based projects | 51 | ||
salesforce | Optimized for Salesforce based projects | 55 | ||
security | Optimized for security | 24 | ||
swift | Optimized for SWIFT based projects | 51 | ||
terraform | Optimized for TERRAFORM based projects | 55 |
Behind the scenes
How are identified applicable files
- File extensions:
.sh
,.bash
,.dash
,.ksh
How the linting is performed
- shellcheck is called once with the list of files as arguments (
list_of_files
CLI lint mode)
Example calls
shellcheck --color=auto --external-sources myfile.sh
Help content
Usage: shellcheck [OPTIONS...] FILES...
-a --check-sourced Include warnings from sourced files
-C[WHEN] --color[=WHEN] Use color (auto, always, never)
-i CODE1,CODE2.. --include=CODE1,CODE2.. Consider only given types of warnings
-e CODE1,CODE2.. --exclude=CODE1,CODE2.. Exclude types of warnings
-f FORMAT --format=FORMAT Output format (checkstyle, diff, gcc, json, json1, quiet, tty)
--list-optional List checks disabled by default
--norc Don't look for .shellcheckrc files
-o check1,check2.. --enable=check1,check2.. List of optional checks to enable (or 'all')
-P SOURCEPATHS --source-path=SOURCEPATHS Specify path when looking for sourced files ("SCRIPTDIR" for script's dir)
-s SHELLNAME --shell=SHELLNAME Specify dialect (sh, bash, dash, ksh)
-S SEVERITY --severity=SEVERITY Minimum severity of errors to consider (error, warning, info, style)
-V --version Print version information
-W NUM --wiki-link-count=NUM The number of wiki links to show, when applicable
-x --external-sources Allow 'source' outside of FILES
--help Show this usage summary and exit
Installation on mega-linter Docker image
- Dockerfile commands :
FROM koalaman/shellcheck:stable as shellcheck
COPY --link --from=shellcheck /bin/shellcheck /usr/bin/shellcheck