@netlify/content-engine
Version:
41 lines • 1.94 kB
JavaScript
;
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.mergeGatsbyConfig = void 0;
const lodash_uniq_1 = __importDefault(require("lodash.uniq"));
const lodash_merge_1 = __importDefault(require("lodash.merge"));
const howToMerge = {
/**
* pick a truthy value by default.
* This makes sure that if a single value is defined, that one it used.
* We prefer the "right" value, because the user's config will be "on the right"
*/
byDefault: (a, b) => b || a,
siteMetadata: (objA, objB) => (0, lodash_merge_1.default)({}, objA, objB),
// plugins are concatenated and uniq'd, so we don't get two of the same plugin value
plugins: (a = [], b = []) => a.concat(b),
mapping: (objA, objB) => (0, lodash_merge_1.default)({}, objA, objB),
};
/**
* Defines how a theme object is merged with the user's config
*/
const mergeGatsbyConfig = (a, b) => {
// a and b are gatsby configs, If they have keys, that means there are values to merge
const allGatsbyConfigKeysWithAValue = (0, lodash_uniq_1.default)(Object.keys(a).concat(Object.keys(b)));
// reduce the array of mergable keys into a single gatsby config object
const mergedConfig = allGatsbyConfigKeysWithAValue.reduce((config, gatsbyConfigKey) => {
// choose a merge function for the config key if there's one defined,
// otherwise use the default value merge function
const mergeFn = howToMerge[gatsbyConfigKey] || howToMerge.byDefault;
return {
...config,
[gatsbyConfigKey]: mergeFn(a[gatsbyConfigKey], b[gatsbyConfigKey]),
};
}, {});
// return the fully merged config
return mergedConfig;
};
exports.mergeGatsbyConfig = mergeGatsbyConfig;
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