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Configuration in MegaLinter

Variable Description Default value
TERRAFORM_TFLINT_ARGUMENTS User custom arguments to add in linter CLI call
Ex: -s --foo "bar"
TERRAFORM_TFLINT_FILTER_REGEX_INCLUDE Custom regex including filter
Ex: (src\|lib)
Include every file
TERRAFORM_TFLINT_FILTER_REGEX_EXCLUDE Custom regex excluding filter
Ex: (test\|examples)
Exclude no file
TERRAFORM_TFLINT_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
file
TERRAFORM_TFLINT_FILE_EXTENSIONS Allowed file extensions. "*" matches any extension, "" matches empty extension. Empty list excludes all files
Ex: [".py", ""]
[".tf"]
TERRAFORM_TFLINT_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
TERRAFORM_TFLINT_PRE_COMMANDS List of bash commands to run before the linter None
TERRAFORM_TFLINT_POST_COMMANDS List of bash commands to run after the linter None
TERRAFORM_TFLINT_CONFIG_FILE tflint configuration file name
Use LINTER_DEFAULT to let the linter find it
.tflint.hcl
TERRAFORM_TFLINT_RULES_PATH Path where to find linter configuration file Workspace folder, then MegaLinter default rules
TERRAFORM_TFLINT_DISABLE_ERRORS Run linter but consider errors as warnings false
TERRAFORM_TFLINT_DISABLE_ERRORS_IF_LESS_THAN Maximum number of errors allowed 0

MegaLinter Flavours

This linter is available in the following flavours

Flavor Description Embedded linters Info
all Default MegaLinter Flavor 105 Docker Image Size (tag) Docker Pulls
security Optimized for security 21 Docker Image Size (tag) Docker Pulls
terraform Optimized for TERRAFORM based projects 51 Docker Image Size (tag) Docker Pulls

Behind the scenes

How are identified applicable files

  • File extensions: .tf

How the linting is performed

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

Example calls

tflint myfile.tf
tflint -c .tflint.hcl myfile.tf

Help content

Usage:
  tflint [OPTIONS] [FILE or DIR...]

Application Options:
  -v, --version                                                 Print TFLint
                                                                version
      --init                                                    Install plugins
      --langserver                                              Start language
                                                                server
  -f, --format=[default|json|checkstyle|junit|compact|sarif]    Output format
                                                                (default:
                                                                default)
  -c, --config=FILE                                             Config file
                                                                name (default:
                                                                .tflint.hcl)
      --ignore-module=SOURCE                                    Ignore module
                                                                sources
      --enable-rule=RULE_NAME                                   Enable rules
                                                                from the
                                                                command line
      --disable-rule=RULE_NAME                                  Disable rules
                                                                from the
                                                                command line
      --only=RULE_NAME                                          Enable only
                                                                this rule,
                                                                disabling all
                                                                other defaults.
                                                                Can be
                                                                specified
                                                                multiple times
      --enable-plugin=PLUGIN_NAME                               Enable plugins
                                                                from the
                                                                command line
      --var-file=FILE                                           Terraform
                                                                variable file
                                                                name
      --var='foo=bar'                                           Set a Terraform
                                                                variable
      --module                                                  Inspect modules
      --force                                                   Return zero
                                                                exit status
                                                                even if issues
                                                                found
      --no-color                                                Disable
                                                                colorized output
      --loglevel=[trace|debug|info|warn|error]                  Change the
                                                                loglevel

Help Options:
  -h, --help                                                    Show this help
                                                                message

Installation on mega-linter Docker image

  • Dockerfile commands :
FROM ghcr.io/terraform-linters/tflint:v0.35.0 as tflint
COPY --from=tflint /usr/local/bin/tflint /usr/bin/