Current File : //www/loslex/test/node_modules/yaml/browser/dist/schema/yaml-1.1/merge.js
import { isScalar, isAlias, isSeq, isMap } from '../../nodes/identity.js';
import { Scalar } from '../../nodes/Scalar.js';
// If the value associated with a merge key is a single mapping node, each of
// its key/value pairs is inserted into the current mapping, unless the key
// already exists in it. If the value associated with the merge key is a
// sequence, then this sequence is expected to contain mapping nodes and each
// of these nodes is merged in turn according to its order in the sequence.
// Keys in mapping nodes earlier in the sequence override keys specified in
// later mapping nodes. -- http://yaml.org/type/merge.html
const MERGE_KEY = '<<';
const merge = {
identify: value => value === MERGE_KEY ||
(typeof value === 'symbol' && value.description === MERGE_KEY),
default: 'key',
tag: 'tag:yaml.org,2002:merge',
test: /^<<$/,
resolve: () => Object.assign(new Scalar(Symbol(MERGE_KEY)), {
addToJSMap: addMergeToJSMap
}),
stringify: () => MERGE_KEY
};
const isMergeKey = (ctx, key) => (merge.identify(key) ||
(isScalar(key) &&
(!key.type || key.type === Scalar.PLAIN) &&
merge.identify(key.value))) &&
ctx?.doc.schema.tags.some(tag => tag.tag === merge.tag && tag.default);
function addMergeToJSMap(ctx, map, value) {
value = ctx && isAlias(value) ? value.resolve(ctx.doc) : value;
if (isSeq(value))
for (const it of value.items)
mergeValue(ctx, map, it);
else if (Array.isArray(value))
for (const it of value)
mergeValue(ctx, map, it);
else
mergeValue(ctx, map, value);
}
function mergeValue(ctx, map, value) {
const source = ctx && isAlias(value) ? value.resolve(ctx.doc) : value;
if (!isMap(source))
throw new Error('Merge sources must be maps or map aliases');
const srcMap = source.toJSON(null, ctx, Map);
for (const [key, value] of srcMap) {
if (map instanceof Map) {
if (!map.has(key))
map.set(key, value);
}
else if (map instanceof Set) {
map.add(key);
}
else if (!Object.prototype.hasOwnProperty.call(map, key)) {
Object.defineProperty(map, key, {
value,
writable: true,
enumerable: true,
configurable: true
});
}
}
return map;
}
export { addMergeToJSMap, isMergeKey, merge };
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