A VS Code extension allowing syntax validation for TOML and schema validation using Json and Hjson.

It is currently in preview, report bugs on Github.

• Syntax validation for TOML 1.0.0
• Schema validation with Json Schema draft-2020-12
• Default schema & glob pattern associations with schema
• Loading schema in Json or Hjson
• Partial support of auto-completion using the schema (it use only first level properties of the schema) & limited to property keys only
  • Types (including the $ref), the description & examples are indicated
• Syntax Hightlighting is not supported yet, but other extensions providing this feature only are available, you can use them conjointly with this extension

TOML is a simple data format, usually used for configuration files, this extension provide syntaxic correction for it.

id = 10
owner = "John Doe"

[server]
enabled = true
hostname = "localhost"
port = 8080

The extension allow you to use usual Json schema.

{
  "$schema": "http://json-schema.org/draft-04/schema#",
  "title": "Server schema",
  "description": "Simple schema of a server",
  "type": "object",
  "properties": {
    "id": {
      "description": "The unique identifier of a server",
      "type": "integer"
    },
    "owner": {
      "description": "Owner of the server",
      "type": "string"
    },
    "server": {
      "description": "Configuration of the server",
      "$ref": "#/definitions/Server"
    }
  },
  "required": ["id", "owner", "server"],
  "definitions": {
    "Server": {
      "type": "object",
      "additionalProperties": true,
      "properties": {
        "enabled": {
          "type": "boolean"
        },
        "localhost": {
          "type": "string"
        },
        "port": { 
          "type": "integer",
          "minimum": 1024,
          "maximum": 65535
        }
      },
      "title": "Configuration of the server",
      "required": [ "hostname", "port" ]
    }
  }
}

The extension allow you to specify the schema with a less verbose syntax than Json : Hjson.

{
  // You can use comments
  # Properties do not need quotes
  $schema: "http://json-schema.org/draft-04/schema#",
  /* Strings do not need quotes */
  title: Server schema
  type: "object"
  // You do not need commas
  description: "Simple schema of a server"
  properties: {
    id: {
      description: The unique identifier of a server
      type: integer
    }
    owner: {
      description: Owner of the server
      type: "string"
    }
    server: {
      description: "Configuration of the server"
      $ref: "#/definitions/Server"
    }
  }
  required: ["id", "owner", "server"]
  definitions: {
    Server: {
      type: "object"
      additionalProperties : true
      properties: {
        "enabled": {
          "type" : "boolean"
        },
        localhost: {
          "type": "string"
        },
        port: { 
          type: "integer",
          minimum: 1024,
          maximum: 65535
        }
      }
      title : "Configuration of the server"
      required : [ "hostname", "port" ]
    }
  }
}

If you have any requirements or dependencies, add a section describing those and how to install and configure them.

This extension contributes the following settings:

• betterStrongerToml.jsonSchema.enabled: enable/disable usage of schemas
• betterStrongerToml.jsonSchema.defaultSchema: default schema to use, example : "./schema.json"
• betterStrongerToml.jsonSchema.associations: associations between a glob pattern ("**/*.server.toml" for instance) and a schema

If the extension do not seem to be starting (Runtime status : Not yet activated.), you need to associate the file extension .toml to the language toml.

Schema constraints are reported at the first line instead of their actual location, but the path is indicated.

Auto-completion using the schema is limited to first level properties (not those included in the definitions) & are limited to property keys.

Users appreciate release notes as you update your extension.

• Initial release of Better Stronger TOML (preview).

• Fixing minor issues (package.json, README.md).

• Added first version of auto-completion
  • Limited to first level properties of the schema (properties of definitions are not used)
  • Limited to property keys
  • Description is indicated
  • Examples are indicated
  • Types are indicated, the $ref is also indicated
  • Contrainsts are not indicated