Initial commit

5 files changed, 714 insertions, 0 deletions

diff --git a/node_modules/yaml/browser/dist/doc/Document.js b/node_modules/yaml/browser/dist/doc/Document.js
new file mode 100644
index 0000000..c436340
--- /dev/null
+++ b/node_modules/yaml/browser/dist/doc/Document.js
@@ -0,0 +1,332 @@
+import { Alias } from '../nodes/Alias.js';
+import { isEmptyPath, collectionFromPath } from '../nodes/Collection.js';
+import { NODE_TYPE, DOC, isNode, isCollection, isScalar } from '../nodes/Node.js';
+import { Pair } from '../nodes/Pair.js';
+import { toJS } from '../nodes/toJS.js';
+import { Schema } from '../schema/Schema.js';
+import { stringify } from '../stringify/stringify.js';
+import { stringifyDocument } from '../stringify/stringifyDocument.js';
+import { anchorNames, findNewAnchor, createNodeAnchors } from './anchors.js';
+import { applyReviver } from './applyReviver.js';
+import { createNode } from './createNode.js';
+import { Directives } from './directives.js';
+
+class Document {
+    constructor(value, replacer, options) {
+        /** A comment before this Document */
+        this.commentBefore = null;
+        /** A comment immediately after this Document */
+        this.comment = null;
+        /** Errors encountered during parsing. */
+        this.errors = [];
+        /** Warnings encountered during parsing. */
+        this.warnings = [];
+        Object.defineProperty(this, NODE_TYPE, { value: DOC });
+        let _replacer = null;
+        if (typeof replacer === 'function' || Array.isArray(replacer)) {
+            _replacer = replacer;
+        }
+        else if (options === undefined && replacer) {
+            options = replacer;
+            replacer = undefined;
+        }
+        const opt = Object.assign({
+            intAsBigInt: false,
+            keepSourceTokens: false,
+            logLevel: 'warn',
+            prettyErrors: true,
+            strict: true,
+            uniqueKeys: true,
+            version: '1.2'
+        }, options);
+        this.options = opt;
+        let { version } = opt;
+        if (options === null || options === void 0 ? void 0 : options.directives) {
+            this.directives = options.directives.atDocument();
+            if (this.directives.yaml.explicit)
+                version = this.directives.yaml.version;
+        }
+        else
+            this.directives = new Directives({ version });
+        this.setSchema(version, options);
+        if (value === undefined)
+            this.contents = null;
+        else {
+            this.contents = this.createNode(value, _replacer, options);
+        }
+    }
+    /**
+     * Create a deep copy of this Document and its contents.
+     *
+     * Custom Node values that inherit from `Object` still refer to their original instances.
+     */
+    clone() {
+        const copy = Object.create(Document.prototype, {
+            [NODE_TYPE]: { value: DOC }
+        });
+        copy.commentBefore = this.commentBefore;
+        copy.comment = this.comment;
+        copy.errors = this.errors.slice();
+        copy.warnings = this.warnings.slice();
+        copy.options = Object.assign({}, this.options);
+        if (this.directives)
+            copy.directives = this.directives.clone();
+        copy.schema = this.schema.clone();
+        copy.contents = isNode(this.contents)
+            ? this.contents.clone(copy.schema)
+            : this.contents;
+        if (this.range)
+            copy.range = this.range.slice();
+        return copy;
+    }
+    /** Adds a value to the document. */
+    add(value) {
+        if (assertCollection(this.contents))
+            this.contents.add(value);
+    }
+    /** Adds a value to the document. */
+    addIn(path, value) {
+        if (assertCollection(this.contents))
+            this.contents.addIn(path, value);
+    }
+    /**
+     * Create a new `Alias` node, ensuring that the target `node` has the required anchor.
+     *
+     * If `node` already has an anchor, `name` is ignored.
+     * Otherwise, the `node.anchor` value will be set to `name`,
+     * or if an anchor with that name is already present in the document,
+     * `name` will be used as a prefix for a new unique anchor.
+     * If `name` is undefined, the generated anchor will use 'a' as a prefix.
+     */
+    createAlias(node, name) {
+        if (!node.anchor) {
+            const prev = anchorNames(this);
+            node.anchor =
+                // eslint-disable-next-line @typescript-eslint/prefer-nullish-coalescing
+                !name || prev.has(name) ? findNewAnchor(name || 'a', prev) : name;
+        }
+        return new Alias(node.anchor);
+    }
+    createNode(value, replacer, options) {
+        let _replacer = undefined;
+        if (typeof replacer === 'function') {
+            value = replacer.call({ '': value }, '', value);
+            _replacer = replacer;
+        }
+        else if (Array.isArray(replacer)) {
+            const keyToStr = (v) => typeof v === 'number' || v instanceof String || v instanceof Number;
+            const asStr = replacer.filter(keyToStr).map(String);
+            if (asStr.length > 0)
+                replacer = replacer.concat(asStr);
+            _replacer = replacer;
+        }
+        else if (options === undefined && replacer) {
+            options = replacer;
+            replacer = undefined;
+        }
+        const { aliasDuplicateObjects, anchorPrefix, flow, keepUndefined, onTagObj, tag } = options !== null && options !== void 0 ? options : {};
+        const { onAnchor, setAnchors, sourceObjects } = createNodeAnchors(this, 
+        // eslint-disable-next-line @typescript-eslint/prefer-nullish-coalescing
+        anchorPrefix || 'a');
+        const ctx = {
+            aliasDuplicateObjects: aliasDuplicateObjects !== null && aliasDuplicateObjects !== void 0 ? aliasDuplicateObjects : true,
+            keepUndefined: keepUndefined !== null && keepUndefined !== void 0 ? keepUndefined : false,
+            onAnchor,
+            onTagObj,
+            replacer: _replacer,
+            schema: this.schema,
+            sourceObjects
+        };
+        const node = createNode(value, tag, ctx);
+        if (flow && isCollection(node))
+            node.flow = true;
+        setAnchors();
+        return node;
+    }
+    /**
+     * Convert a key and a value into a `Pair` using the current schema,
+     * recursively wrapping all values as `Scalar` or `Collection` nodes.
+     */
+    createPair(key, value, options = {}) {
+        const k = this.createNode(key, null, options);
+        const v = this.createNode(value, null, options);
+        return new Pair(k, v);
+    }
+    /**
+     * Removes a value from the document.
+     * @returns `true` if the item was found and removed.
+     */
+    delete(key) {
+        return assertCollection(this.contents) ? this.contents.delete(key) : false;
+    }
+    /**
+     * Removes a value from the document.
+     * @returns `true` if the item was found and removed.
+     */
+    deleteIn(path) {
+        if (isEmptyPath(path)) {
+            if (this.contents == null)
+                return false;
+            this.contents = null;
+            return true;
+        }
+        return assertCollection(this.contents)
+            ? this.contents.deleteIn(path)
+            : false;
+    }
+    /**
+     * Returns item at `key`, or `undefined` if not found. By default unwraps
+     * scalar values from their surrounding node; to disable set `keepScalar` to
+     * `true` (collections are always returned intact).
+     */
+    get(key, keepScalar) {
+        return isCollection(this.contents)
+            ? this.contents.get(key, keepScalar)
+            : undefined;
+    }
+    /**
+     * Returns item at `path`, or `undefined` if not found. By default unwraps
+     * scalar values from their surrounding node; to disable set `keepScalar` to
+     * `true` (collections are always returned intact).
+     */
+    getIn(path, keepScalar) {
+        if (isEmptyPath(path))
+            return !keepScalar && isScalar(this.contents)
+                ? this.contents.value
+                : this.contents;
+        return isCollection(this.contents)
+            ? this.contents.getIn(path, keepScalar)
+            : undefined;
+    }
+    /**
+     * Checks if the document includes a value with the key `key`.
+     */
+    has(key) {
+        return isCollection(this.contents) ? this.contents.has(key) : false;
+    }
+    /**
+     * Checks if the document includes a value at `path`.
+     */
+    hasIn(path) {
+        if (isEmptyPath(path))
+            return this.contents !== undefined;
+        return isCollection(this.contents) ? this.contents.hasIn(path) : false;
+    }
+    /**
+     * Sets a value in this document. For `!!set`, `value` needs to be a
+     * boolean to add/remove the item from the set.
+     */
+    set(key, value) {
+        if (this.contents == null) {
+            this.contents = collectionFromPath(this.schema, [key], value);
+        }
+        else if (assertCollection(this.contents)) {
+            this.contents.set(key, value);
+        }
+    }
+    /**
+     * Sets a value in this document. For `!!set`, `value` needs to be a
+     * boolean to add/remove the item from the set.
+     */
+    setIn(path, value) {
+        if (isEmptyPath(path))
+            this.contents = value;
+        else if (this.contents == null) {
+            this.contents = collectionFromPath(this.schema, Array.from(path), value);
+        }
+        else if (assertCollection(this.contents)) {
+            this.contents.setIn(path, value);
+        }
+    }
+    /**
+     * Change the YAML version and schema used by the document.
+     * A `null` version disables support for directives, explicit tags, anchors, and aliases.
+     * It also requires the `schema` option to be given as a `Schema` instance value.
+     *
+     * Overrides all previously set schema options.
+     */
+    setSchema(version, options = {}) {
+        if (typeof version === 'number')
+            version = String(version);
+        let opt;
+        switch (version) {
+            case '1.1':
+                if (this.directives)
+                    this.directives.yaml.version = '1.1';
+                else
+                    this.directives = new Directives({ version: '1.1' });
+                opt = { merge: true, resolveKnownTags: false, schema: 'yaml-1.1' };
+                break;
+            case '1.2':
+            case 'next':
+                if (this.directives)
+                    this.directives.yaml.version = version;
+                else
+                    this.directives = new Directives({ version });
+                opt = { merge: false, resolveKnownTags: true, schema: 'core' };
+                break;
+            case null:
+                if (this.directives)
+                    delete this.directives;
+                opt = null;
+                break;
+            default: {
+                const sv = JSON.stringify(version);
+                throw new Error(`Expected '1.1', '1.2' or null as first argument, but found: ${sv}`);
+            }
+        }
+        // Not using `instanceof Schema` to allow for duck typing
+        if (options.schema instanceof Object)
+            this.schema = options.schema;
+        else if (opt)
+            this.schema = new Schema(Object.assign(opt, options));
+        else
+            throw new Error(`With a null YAML version, the { schema: Schema } option is required`);
+    }
+    // json & jsonArg are only used from toJSON()
+    toJS({ json, jsonArg, mapAsMap, maxAliasCount, onAnchor, reviver } = {}) {
+        const ctx = {
+            anchors: new Map(),
+            doc: this,
+            keep: !json,
+            mapAsMap: mapAsMap === true,
+            mapKeyWarned: false,
+            maxAliasCount: typeof maxAliasCount === 'number' ? maxAliasCount : 100,
+            stringify
+        };
+        const res = toJS(this.contents, jsonArg !== null && jsonArg !== void 0 ? jsonArg : '', ctx);
+        if (typeof onAnchor === 'function')
+            for (const { count, res } of ctx.anchors.values())
+                onAnchor(res, count);
+        return typeof reviver === 'function'
+            ? applyReviver(reviver, { '': res }, '', res)
+            : res;
+    }
+    /**
+     * A JSON representation of the document `contents`.
+     *
+     * @param jsonArg Used by `JSON.stringify` to indicate the array index or
+     *   property name.
+     */
+    toJSON(jsonArg, onAnchor) {
+        return this.toJS({ json: true, jsonArg, mapAsMap: false, onAnchor });
+    }
+    /** A YAML representation of the document. */
+    toString(options = {}) {
+        if (this.errors.length > 0)
+            throw new Error('Document with errors cannot be stringified');
+        if ('indent' in options &&
+            (!Number.isInteger(options.indent) || Number(options.indent) <= 0)) {
+            const s = JSON.stringify(options.indent);
+            throw new Error(`"indent" option must be a positive integer, not ${s}`);
+        }
+        return stringifyDocument(this, options);
+    }
+}
+function assertCollection(contents) {
+    if (isCollection(contents))
+        return true;
+    throw new Error('Expected a YAML collection as document contents');
+}
+
+export { Document };
diff --git a/node_modules/yaml/browser/dist/doc/anchors.js b/node_modules/yaml/browser/dist/doc/anchors.js
new file mode 100644
index 0000000..797e8a7
--- /dev/null
+++ b/node_modules/yaml/browser/dist/doc/anchors.js
@@ -0,0 +1,72 @@
+import { isScalar, isCollection } from '../nodes/Node.js';
+import { visit } from '../visit.js';
+
+/**
+ * Verify that the input string is a valid anchor.
+ *
+ * Will throw on errors.
+ */
+function anchorIsValid(anchor) {
+    if (/[\x00-\x19\s,[\]{}]/.test(anchor)) {
+        const sa = JSON.stringify(anchor);
+        const msg = `Anchor must not contain whitespace or control characters: ${sa}`;
+        throw new Error(msg);
+    }
+    return true;
+}
+function anchorNames(root) {
+    const anchors = new Set();
+    visit(root, {
+        Value(_key, node) {
+            if (node.anchor)
+                anchors.add(node.anchor);
+        }
+    });
+    return anchors;
+}
+/** Find a new anchor name with the given `prefix` and a one-indexed suffix. */
+function findNewAnchor(prefix, exclude) {
+    for (let i = 1; true; ++i) {
+        const name = `${prefix}${i}`;
+        if (!exclude.has(name))
+            return name;
+    }
+}
+function createNodeAnchors(doc, prefix) {
+    const aliasObjects = [];
+    const sourceObjects = new Map();
+    let prevAnchors = null;
+    return {
+        onAnchor: (source) => {
+            aliasObjects.push(source);
+            if (!prevAnchors)
+                prevAnchors = anchorNames(doc);
+            const anchor = findNewAnchor(prefix, prevAnchors);
+            prevAnchors.add(anchor);
+            return anchor;
+        },
+        /**
+         * With circular references, the source node is only resolved after all
+         * of its child nodes are. This is why anchors are set only after all of
+         * the nodes have been created.
+         */
+        setAnchors: () => {
+            for (const source of aliasObjects) {
+                const ref = sourceObjects.get(source);
+                if (typeof ref === 'object' &&
+                    ref.anchor &&
+                    (isScalar(ref.node) || isCollection(ref.node))) {
+                    ref.node.anchor = ref.anchor;
+                }
+                else {
+                    const error = new Error('Failed to resolve repeated object (this should not happen)');
+                    error.source = source;
+                    throw error;
+                }
+            }
+        },
+        sourceObjects
+    };
+}
+
+export { anchorIsValid, anchorNames, createNodeAnchors, findNewAnchor };
diff --git a/node_modules/yaml/browser/dist/doc/applyReviver.js b/node_modules/yaml/browser/dist/doc/applyReviver.js
new file mode 100644
index 0000000..0e6a93c
--- /dev/null
+++ b/node_modules/yaml/browser/dist/doc/applyReviver.js
@@ -0,0 +1,54 @@
+/**
+ * Applies the JSON.parse reviver algorithm as defined in the ECMA-262 spec,
+ * in section 24.5.1.1 "Runtime Semantics: InternalizeJSONProperty" of the
+ * 2021 edition: https://tc39.es/ecma262/#sec-json.parse
+ *
+ * Includes extensions for handling Map and Set objects.
+ */
+function applyReviver(reviver, obj, key, val) {
+    if (val && typeof val === 'object') {
+        if (Array.isArray(val)) {
+            for (let i = 0, len = val.length; i < len; ++i) {
+                const v0 = val[i];
+                const v1 = applyReviver(reviver, val, String(i), v0);
+                if (v1 === undefined)
+                    delete val[i];
+                else if (v1 !== v0)
+                    val[i] = v1;
+            }
+        }
+        else if (val instanceof Map) {
+            for (const k of Array.from(val.keys())) {
+                const v0 = val.get(k);
+                const v1 = applyReviver(reviver, val, k, v0);
+                if (v1 === undefined)
+                    val.delete(k);
+                else if (v1 !== v0)
+                    val.set(k, v1);
+            }
+        }
+        else if (val instanceof Set) {
+            for (const v0 of Array.from(val)) {
+                const v1 = applyReviver(reviver, val, v0, v0);
+                if (v1 === undefined)
+                    val.delete(v0);
+                else if (v1 !== v0) {
+                    val.delete(v0);
+                    val.add(v1);
+                }
+            }
+        }
+        else {
+            for (const [k, v0] of Object.entries(val)) {
+                const v1 = applyReviver(reviver, val, k, v0);
+                if (v1 === undefined)
+                    delete val[k];
+                else if (v1 !== v0)
+                    val[k] = v1;
+            }
+        }
+    }
+    return reviver.call(obj, key, val);
+}
+
+export { applyReviver };
diff --git a/node_modules/yaml/browser/dist/doc/createNode.js b/node_modules/yaml/browser/dist/doc/createNode.js
new file mode 100644
index 0000000..8ad907d
--- /dev/null
+++ b/node_modules/yaml/browser/dist/doc/createNode.js
@@ -0,0 +1,87 @@
+import { Alias } from '../nodes/Alias.js';
+import { isNode, isPair, MAP, SEQ, isDocument } from '../nodes/Node.js';
+import { Scalar } from '../nodes/Scalar.js';
+
+const defaultTagPrefix = 'tag:yaml.org,2002:';
+function findTagObject(value, tagName, tags) {
+    var _a;
+    if (tagName) {
+        const match = tags.filter(t => t.tag === tagName);
+        const tagObj = (_a = match.find(t => !t.format)) !== null && _a !== void 0 ? _a : match[0];
+        if (!tagObj)
+            throw new Error(`Tag ${tagName} not found`);
+        return tagObj;
+    }
+    return tags.find(t => { var _a; return ((_a = t.identify) === null || _a === void 0 ? void 0 : _a.call(t, value)) && !t.format; });
+}
+function createNode(value, tagName, ctx) {
+    var _a, _b;
+    if (isDocument(value))
+        value = value.contents;
+    if (isNode(value))
+        return value;
+    if (isPair(value)) {
+        const map = (_b = (_a = ctx.schema[MAP]).createNode) === null || _b === void 0 ? void 0 : _b.call(_a, ctx.schema, null, ctx);
+        map.items.push(value);
+        return map;
+    }
+    if (value instanceof String ||
+        value instanceof Number ||
+        value instanceof Boolean ||
+        (typeof BigInt === 'function' && value instanceof BigInt) // not supported everywhere
+    ) {
+        // https://tc39.es/ecma262/#sec-serializejsonproperty
+        value = value.valueOf();
+    }
+    const { aliasDuplicateObjects, onAnchor, onTagObj, schema, sourceObjects } = ctx;
+    // Detect duplicate references to the same object & use Alias nodes for all
+    // after first. The `ref` wrapper allows for circular references to resolve.
+    let ref = undefined;
+    if (aliasDuplicateObjects && value && typeof value === 'object') {
+        ref = sourceObjects.get(value);
+        if (ref) {
+            if (!ref.anchor)
+                ref.anchor = onAnchor(value);
+            return new Alias(ref.anchor);
+        }
+        else {
+            ref = { anchor: null, node: null };
+            sourceObjects.set(value, ref);
+        }
+    }
+    if (tagName === null || tagName === void 0 ? void 0 : tagName.startsWith('!!'))
+        tagName = defaultTagPrefix + tagName.slice(2);
+    let tagObj = findTagObject(value, tagName, schema.tags);
+    if (!tagObj) {
+        if (value && typeof value.toJSON === 'function') {
+            // eslint-disable-next-line @typescript-eslint/no-unsafe-call
+            value = value.toJSON();
+        }
+        if (!value || typeof value !== 'object') {
+            const node = new Scalar(value);
+            if (ref)
+                ref.node = node;
+            return node;
+        }
+        tagObj =
+            value instanceof Map
+                ? schema[MAP]
+                : Symbol.iterator in Object(value)
+                    ? schema[SEQ]
+                    : schema[MAP];
+    }
+    if (onTagObj) {
+        onTagObj(tagObj);
+        delete ctx.onTagObj;
+    }
+    const node = (tagObj === null || tagObj === void 0 ? void 0 : tagObj.createNode)
+        ? tagObj.createNode(ctx.schema, value, ctx)
+        : new Scalar(value);
+    if (tagName)
+        node.tag = tagName;
+    if (ref)
+        ref.node = node;
+    return node;
+}
+
+export { createNode };
diff --git a/node_modules/yaml/browser/dist/doc/directives.js b/node_modules/yaml/browser/dist/doc/directives.js
new file mode 100644
index 0000000..bdbc153
--- /dev/null
+++ b/node_modules/yaml/browser/dist/doc/directives.js
@@ -0,0 +1,169 @@
+import { isNode } from '../nodes/Node.js';
+import { visit } from '../visit.js';
+
+const escapeChars = {
+    '!': '%21',
+    ',': '%2C',
+    '[': '%5B',
+    ']': '%5D',
+    '{': '%7B',
+    '}': '%7D'
+};
+const escapeTagName = (tn) => tn.replace(/[!,[\]{}]/g, ch => escapeChars[ch]);
+class Directives {
+    constructor(yaml, tags) {
+        /**
+         * The directives-end/doc-start marker `---`. If `null`, a marker may still be
+         * included in the document's stringified representation.
+         */
+        this.docStart = null;
+        /** The doc-end marker `...`.  */
+        this.docEnd = false;
+        this.yaml = Object.assign({}, Directives.defaultYaml, yaml);
+        this.tags = Object.assign({}, Directives.defaultTags, tags);
+    }
+    clone() {
+        const copy = new Directives(this.yaml, this.tags);
+        copy.docStart = this.docStart;
+        return copy;
+    }
+    /**
+     * During parsing, get a Directives instance for the current document and
+     * update the stream state according to the current version's spec.
+     */
+    atDocument() {
+        const res = new Directives(this.yaml, this.tags);
+        switch (this.yaml.version) {
+            case '1.1':
+                this.atNextDocument = true;
+                break;
+            case '1.2':
+                this.atNextDocument = false;
+                this.yaml = {
+                    explicit: Directives.defaultYaml.explicit,
+                    version: '1.2'
+                };
+                this.tags = Object.assign({}, Directives.defaultTags);
+                break;
+        }
+        return res;
+    }
+    /**
+     * @param onError - May be called even if the action was successful
+     * @returns `true` on success
+     */
+    add(line, onError) {
+        if (this.atNextDocument) {
+            this.yaml = { explicit: Directives.defaultYaml.explicit, version: '1.1' };
+            this.tags = Object.assign({}, Directives.defaultTags);
+            this.atNextDocument = false;
+        }
+        const parts = line.trim().split(/[ \t]+/);
+        const name = parts.shift();
+        switch (name) {
+            case '%TAG': {
+                if (parts.length !== 2) {
+                    onError(0, '%TAG directive should contain exactly two parts');
+                    if (parts.length < 2)
+                        return false;
+                }
+                const [handle, prefix] = parts;
+                this.tags[handle] = prefix;
+                return true;
+            }
+            case '%YAML': {
+                this.yaml.explicit = true;
+                if (parts.length !== 1) {
+                    onError(0, '%YAML directive should contain exactly one part');
+                    return false;
+                }
+                const [version] = parts;
+                if (version === '1.1' || version === '1.2') {
+                    this.yaml.version = version;
+                    return true;
+                }
+                else {
+                    const isValid = /^\d+\.\d+$/.test(version);
+                    onError(6, `Unsupported YAML version ${version}`, isValid);
+                    return false;
+                }
+            }
+            default:
+                onError(0, `Unknown directive ${name}`, true);
+                return false;
+        }
+    }
+    /**
+     * Resolves a tag, matching handles to those defined in %TAG directives.
+     *
+     * @returns Resolved tag, which may also be the non-specific tag `'!'` or a
+     *   `'!local'` tag, or `null` if unresolvable.
+     */
+    tagName(source, onError) {
+        if (source === '!')
+            return '!'; // non-specific tag
+        if (source[0] !== '!') {
+            onError(`Not a valid tag: ${source}`);
+            return null;
+        }
+        if (source[1] === '<') {
+            const verbatim = source.slice(2, -1);
+            if (verbatim === '!' || verbatim === '!!') {
+                onError(`Verbatim tags aren't resolved, so ${source} is invalid.`);
+                return null;
+            }
+            if (source[source.length - 1] !== '>')
+                onError('Verbatim tags must end with a >');
+            return verbatim;
+        }
+        const [, handle, suffix] = source.match(/^(.*!)([^!]*)$/);
+        if (!suffix)
+            onError(`The ${source} tag has no suffix`);
+        const prefix = this.tags[handle];
+        if (prefix)
+            return prefix + decodeURIComponent(suffix);
+        if (handle === '!')
+            return source; // local tag
+        onError(`Could not resolve tag: ${source}`);
+        return null;
+    }
+    /**
+     * Given a fully resolved tag, returns its printable string form,
+     * taking into account current tag prefixes and defaults.
+     */
+    tagString(tag) {
+        for (const [handle, prefix] of Object.entries(this.tags)) {
+            if (tag.startsWith(prefix))
+                return handle + escapeTagName(tag.substring(prefix.length));
+        }
+        return tag[0] === '!' ? tag : `!<${tag}>`;
+    }
+    toString(doc) {
+        const lines = this.yaml.explicit
+            ? [`%YAML ${this.yaml.version || '1.2'}`]
+            : [];
+        const tagEntries = Object.entries(this.tags);
+        let tagNames;
+        if (doc && tagEntries.length > 0 && isNode(doc.contents)) {
+            const tags = {};
+            visit(doc.contents, (_key, node) => {
+                if (isNode(node) && node.tag)
+                    tags[node.tag] = true;
+            });
+            tagNames = Object.keys(tags);
+        }
+        else
+            tagNames = [];
+        for (const [handle, prefix] of tagEntries) {
+            if (handle === '!!' && prefix === 'tag:yaml.org,2002:')
+                continue;
+            if (!doc || tagNames.some(tn => tn.startsWith(prefix)))
+                lines.push(`%TAG ${handle} ${prefix}`);
+        }
+        return lines.join('\n');
+    }
+}
+Directives.defaultYaml = { explicit: false, version: '1.2' };
+Directives.defaultTags = { '!!': 'tag:yaml.org,2002:' };
+
+export { Directives };