actionlint
Static checker for GitHub Actions workflow files
actionlint documentation
- Version in MegaLinter: 1.6.26
- Visit Official Web Site
- See How to configure actionlint rules
Configuration in MegaLinter
- Enable actionlint by adding
ACTION_ACTIONLINT
in ENABLE_LINTERS variable - Disable actionlint by adding
ACTION_ACTIONLINT
in DISABLE_LINTERS variable
Variable | Description | Default value |
---|---|---|
ACTION_ACTIONLINT_ARGUMENTS | User custom arguments to add in linter CLI call Ex: -s --foo "bar" |
|
ACTION_ACTIONLINT_COMMAND_REMOVE_ARGUMENTS | User custom arguments to remove from command line before calling the linter Ex: -s --foo "bar" |
|
ACTION_ACTIONLINT_FILTER_REGEX_INCLUDE | Custom regex including filter Ex: (src\|lib) |
Include every file |
ACTION_ACTIONLINT_FILTER_REGEX_EXCLUDE | Custom regex excluding filter Ex: (test\|examples) |
Exclude no file |
ACTION_ACTIONLINT_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 |
ACTION_ACTIONLINT_FILE_EXTENSIONS | Allowed file extensions. "*" matches any extension, "" matches empty extension. Empty list excludes all filesEx: [".py", ""] |
[".yml", ".yaml"] |
ACTION_ACTIONLINT_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 |
ACTION_ACTIONLINT_PRE_COMMANDS | List of bash commands to run before the linter | None |
ACTION_ACTIONLINT_POST_COMMANDS | List of bash commands to run after the linter | None |
ACTION_ACTIONLINT_UNSECURED_ENV_VARIABLES | List of env variables explicitly not filtered before calling ACTION_ACTIONLINT and its pre/post commands | None |
ACTION_ACTIONLINT_CONFIG_FILE | actionlint configuration file nameUse LINTER_DEFAULT to let the linter find it |
actionlint.yml |
ACTION_ACTIONLINT_RULES_PATH | Path where to find linter configuration file | Workspace folder, then MegaLinter default rules |
ACTION_ACTIONLINT_DISABLE_ERRORS | Run linter but consider errors as warnings | false |
ACTION_ACTIONLINT_DISABLE_ERRORS_IF_LESS_THAN | Maximum number of errors allowed | 0 |
ACTION_ACTIONLINT_CLI_EXECUTABLE | Override CLI executable | ['actionlint'] |
ACTION_DIRECTORY | Directory containing ACTION files (use any to always activate the linter) |
.github/workflows |
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 | ||
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 | ||
swift | Optimized for SWIFT based projects | 51 | ||
terraform | Optimized for TERRAFORM based projects | 55 |
Behind the scenes
How are identified applicable files
- Activated only if sub-directory
.github/workflows
is found. (directory name can be overridden withACTION_DIRECTORY
) - File extensions:
.yml
,.yaml
How the linting is performed
- actionlint is called once with the list of files as arguments (
list_of_files
CLI lint mode)
Example calls
actionlint /path/to/workflow1.yml /path/to/workflow2.yaml
Help content
Usage: actionlint [FLAGS] [FILES...] [-]
actionlint is a linter for GitHub Actions workflow files.
To check all YAML files in current repository, just run actionlint without
arguments. It automatically finds the nearest '.github/workflows' directory:
$ actionlint
To check specific files, pass the file paths as arguments:
$ actionlint file1.yaml file2.yaml
To check content which is not saved in file yet (e.g. output from some
command), pass - argument. It reads stdin and checks it as workflow file:
$ actionlint -
To serialize errors into JSON, use -format option. It allows to format error
messages flexibly with Go template syntax.
$ actionlint -format '{{json .}}'
Documents:
https://github.com/rhysd/actionlint/tree/main/docs
Flags:
-color
Always enable colorful output. This is useful to force colorful outputs
-config-file string
File path to config file
-debug
Enable debug output (for development)
-format string
Custom template to format error messages in Go template syntax. See https://github.com/rhysd/actionlint/tree/main/docs/usage.md#format
-ignore value
Regular expression matching to error messages you want to ignore. This flag is repeatable
-init-config
Generate default config file at .github/actionlint.yaml in current project
-no-color
Disable colorful output
-oneline
Use one line per one error. Useful for reading error messages from programs
-pyflakes string
Command name or file path of "pyflakes" external command. If empty, pyflakes integration will be disabled (default "pyflakes")
-shellcheck string
Command name or file path of "shellcheck" external command. If empty, shellcheck integration will be disabled (default "shellcheck")
-stdin-filename string
File name when reading input from stdin
-verbose
Enable verbose output
-version
Show version and how this binary was installed
Installation on mega-linter Docker image
- Dockerfile commands :
FROM rhysd/actionlint:latest as actionlint
# shellcheck is a dependency for actionlint
FROM koalaman/shellcheck:stable as shellcheck
COPY --link --from=actionlint /usr/local/bin/actionlint /usr/bin/actionlint
# shellcheck is a dependency for actionlint
COPY --link --from=shellcheck /bin/shellcheck /usr/bin/shellcheck
- APK packages (Linux):