Skip to content

spectral

spectral documentation

spectral - GitHub

Configuration in Mega-Linter

Variable Description Default value
OPENAPI_SPECTRAL_ARGUMENTS User custom arguments to add in linter CLI call
Ex: -s --foo "bar"
OPENAPI_SPECTRAL_FILTER_REGEX_INCLUDE Custom regex including filter
Ex: (src\|lib)		 Include every file
OPENAPI_SPECTRAL_FILTER_REGEX_EXCLUDE Custom regex excluding filter
Ex: (test\|examples)		 Exclude no file
OPENAPI_SPECTRAL_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		 {linter.cli_lint_mode}
OPENAPI_SPECTRAL_FILE_EXTENSIONS Allowed file extensions. "*" matches any extension, "" matches empty extension. Empty list excludes all files
Ex: [".py", ""]		 [".yml", ".yaml", ".json"]
OPENAPI_SPECTRAL_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
OPENAPI_SPECTRAL_PRE_COMMANDS List of bash commands to run before the linter None
OPENAPI_SPECTRAL_POST_COMMANDS List of bash commands to run after the linter None
OPENAPI_SPECTRAL_CONFIG_FILE spectral configuration file name
Use LINTER_DEFAULT to let the linter find it		 .openapirc.yml
OPENAPI_SPECTRAL_RULES_PATH Path where to find linter configuration file Workspace folder, then Mega-Linter default rules
OPENAPI_SPECTRAL_DISABLE_ERRORS Run linter but consider errors as warnings false
OPENAPI_SPECTRAL_DISABLE_ERRORS_IF_LESS_THAN Maximum number of errors allowed 0

IDE Integration

Use spectral in your favorite IDE to catch errors before Mega-Linter !

IDE Extension Name Install
stoplight Native integration Visit Web Site
Visual Studio Code vscode-spectral Visit Web Site

Mega-Linter Flavours

This linter is available in the following flavours

Flavor Description Embedded linters Info
all Default Mega-Linter Flavor 94 Docker Image Size (tag) Docker Pulls
dart Optimized for DART based projects 41 Docker Image Size (tag) Docker Pulls
documentation Mega-Linter for documentation projects 40 Docker Image Size (tag) Docker Pulls
dotnet Optimized for C, C++, C# or VB based projects 47 Docker Image Size (tag) Docker Pulls
go Optimized for GO based projects 42 Docker Image Size (tag) Docker Pulls
java Optimized for JAVA based projects 42 Docker Image Size (tag) Docker Pulls
javascript Optimized for JAVASCRIPT or TYPESCRIPT based projects 49 Docker Image Size (tag) Docker Pulls
php Optimized for PHP based projects 44 Docker Image Size (tag) Docker Pulls
python Optimized for PYTHON based projects 49 Docker Image Size (tag) Docker Pulls
ruby Optimized for RUBY based projects 41 Docker Image Size (tag) Docker Pulls
rust Optimized for RUST based projects 41 Docker Image Size (tag) Docker Pulls
salesforce Optimized for Salesforce based projects 43 Docker Image Size (tag) Docker Pulls
scala Optimized for SCALA based projects 41 Docker Image Size (tag) Docker Pulls
swift Optimized for SWIFT based projects 41 Docker Image Size (tag) Docker Pulls
terraform Optimized for TERRAFORM based projects 45 Docker Image Size (tag) Docker Pulls

Behind the scenes

How are identified applicable files

  • File extensions: .yml, .yaml, .json
  • Detected file content (regex): "openapi":, "swagger":, openapi:, swagger:

How the linting is performed

  • spectral is called one time by identified file

Example calls

spectral lint myfile.yml

spectral lint -r .openapirc.yml myfile.yml

Help content

spectral lint [documents..]

lint JSON/YAML documents from files or URLs

Positionals:
  documents  Location of JSON/YAML documents. Can be either a file, a glob or fetchable resource(s) on the web.  [array] [default: []]

Options:
  --version                    Show version number  [boolean]
  --help                       Show help  [boolean]
  --encoding, -e               text encoding to use  [string] [default: "utf8"]
  --format, -f                 formatter to use for outputting results  [string] [default: "stylish"]
  --output, -o                 output to a file instead of stdout  [string]
  --resolver                   path to custom json-ref-resolver instance  [string]
  --ruleset, -r                path/URL to a ruleset file  [string]
  --skip-rule, -s              ignore certain rules if they are causing trouble  [string]
  --fail-severity, -F          results of this level or above will trigger a failure exit code  [string] [choices: "error", "warn", "info", "hint"] [default: "error"]
  --display-only-failures, -D  only output results equal to or greater than --fail-severity  [boolean] [default: false]
  --ignore-unknown-format      do not warn about unmatched formats  [boolean] [default: false]
  --show-unmatched-globs       show unmatched glob patterns  [boolean] [default: false]
  --verbose, -v                increase verbosity  [boolean]
  --quiet, -q                  no logging - output only  [boolean]

Installation on mega-linter Docker image

Example success log

Results of spectral linter (version 5.6.0)
See documentation on https://megalinter.github.io/descriptors/openapi_spectral/
-----------------------------------------------

[SUCCESS] .automation/test/openapi/openapi_good_1.yml
    OpenAPI 3.x detected
    No results with a severity of 'error' or higher found!

[SUCCESS] .automation/test/openapi/openapi_good_2.json
    OpenAPI 3.x detected
    No results with a severity of 'error' or higher found!

Example error log

Results of spectral linter (version 5.6.0)
See documentation on https://megalinter.github.io/descriptors/openapi_spectral/
-----------------------------------------------

[ERROR] .automation/test/openapi/openapi_bad_1.yml
    OpenAPI 3.x detected

    .automation/test/openapi/openapi_bad_1.yml
     1:1  warning  info-contact      Info object should contain `contact` object.
     1:1  warning  info-description  OpenAPI object info `description` must be present and non-empty string.
     1:1  warning  oas3-api-servers  OpenAPI `servers` must be present and non-empty array.
     1:1    error  oas3-schema       Object should have required property `info`.
     1:1  warning  openapi-tags      OpenAPI object should have non-empty `tags` array.

    ✖ 5 problems (1 error, 4 warnings, 0 infos, 0 hints)

[ERROR] .automation/test/openapi/openapi_bad_2.json
    OpenAPI 3.x detected

    .automation/test/openapi/openapi_bad_2.json
     1:1  warning  info-contact      Info object should contain `contact` object.
     1:1  warning  info-description  OpenAPI object info `description` must be present and non-empty string.
     1:1  warning  oas3-api-servers  OpenAPI `servers` must be present and non-empty array.
     1:1    error  oas3-schema       Object should have required property `info`.
     1:1  warning  openapi-tags      OpenAPI object should have non-empty `tags` array.

    ✖ 5 problems (1 error, 4 warnings, 0 infos, 0 hints)