GraphQL Linter

As this issue has been open since 2020, the decision was made to add federation support to a new linter. In other words, the graphql-schema-linter spec is honoured and federation support is added.

Features

• All rules from graphql-schema-linter supported.
• Federation directives and composition are recognized and validated.
• Validates GraphQL SDL files for syntax and best practices.
• Checks for Apollo Federation directive usage and typos.
• Ensures all types, enums, and fields have descriptions.
• Detects undefined types and invalid enum values.
• Reports errors with line numbers and context.
• Supports error suppression via comments.

Installation

Binary

ARCH=$(uname -m | awk '{if ($1=="x86_64") print "amd64"; else if ($1=="arm64" || $1=="aarch64") print "arm64"; else { print "Unsupported architecture: " $1 > "/dev/stderr"; exit 1 }}')
OS=$(uname | tr '[:upper:]' '[:lower:]')
VERSION=v0.1.0
curl --fail -L https://github.com/schubergphilis/graphql-linter/releases/download/${VERSION}/graphql-linter-${VERSION}-${OS}-${ARCH} \
-o graphql-linter && \
chmod +x graphql-linter && \
./graphql-linter --version | grep ${VERSION}

Golang

go install github.com/schubergphilis/graphql-linter/cmd/graphql-linter@v0.1.0 && \
graphql-linter --version

Usage

Command-line Parameters

• -configPath string The path to the configuration file (optional, defaults to .graphql-linter.yaml in the current directory).
• -targetPath string The directory with GraphQL files that should be checked.
• -verbose Enable verbose output.
• -version Show version information and exit.

Testdata generation

go run cmd/graphql-testdata-generator/main.go

Help

go run cmd/graphql-linter/main.go --help

Lint a specific directory

go run cmd/graphql-linter/main.go \
  -targetPath test/testdata/graphql/base/invalid

Lint a specific file

go run cmd/graphql-linter/main.go \
  -targetPath test/testdata/graphql/base/invalid/20-suspicious-enum-value.graphql

Example configuration file

By default, the linter looks for a .graphql-linter.yaml file in the current directory.

For a full example with all options and comments, see the provided .graphql-linter.yml.example file in the repository root.

Example minimal configuration:

rules:
  require-descriptions:
    types: true
    fields: true
    enums: true
suppressions:
  - path: "test/testdata/graphql/invalid/ignore_this.graphql"
    rules: ["require-descriptions"]