schema.json

{
    "type": "object",
    "additionalProperties": false,
    "properties": {
        "uglify": {
            "anyOf": [
                {"type": "object"},
                {"type": "boolean"}
            ]
        },
        "sourceMap": {
            "type": "boolean"
        },
        "useHash": {
            "type": "boolean"
        },
        "hashFunction": {
            "type": "string"
        },
        "hashDigest": {
            "type": "string"
        },
        "name": {
            "type": "string"
        },
        "fileName": {
            "type": "string"
        },
        "filesToConcat": {
            "type": "array"
        },
        "injectType": {
            "enum": ["prepend", "append", "none"]
        },
        "attributes": {
            "type": "object"
        },
        "publicPath": {
            "type": "string"
        },
        "outputPath": {
            "anyOf": [
                {"type": "boolean"},
                {"type": "string"}
            ]
        }
    }
}