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-rw-r--r--std/encoding/_yaml/dumper/dumper.ts896
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diff --git a/std/encoding/_yaml/dumper/dumper.ts b/std/encoding/_yaml/dumper/dumper.ts
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--- a/std/encoding/_yaml/dumper/dumper.ts
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-// Ported from js-yaml v3.13.1:
-// https://github.com/nodeca/js-yaml/commit/665aadda42349dcae869f12040d9b10ef18d12da
-// Copyright 2011-2015 by Vitaly Puzrin. All rights reserved. MIT license.
-// Copyright 2018-2021 the Deno authors. All rights reserved. MIT license.
-
-import { YAMLError } from "../error.ts";
-import type { RepresentFn, StyleVariant, Type } from "../type.ts";
-import * as common from "../utils.ts";
-import { DumperState, DumperStateOptions } from "./dumper_state.ts";
-
-type Any = common.Any;
-type ArrayObject<T = Any> = common.ArrayObject<T>;
-
-const _toString = Object.prototype.toString;
-const _hasOwnProperty = Object.prototype.hasOwnProperty;
-
-const CHAR_TAB = 0x09; /* Tab */
-const CHAR_LINE_FEED = 0x0a; /* LF */
-const CHAR_SPACE = 0x20; /* Space */
-const CHAR_EXCLAMATION = 0x21; /* ! */
-const CHAR_DOUBLE_QUOTE = 0x22; /* " */
-const CHAR_SHARP = 0x23; /* # */
-const CHAR_PERCENT = 0x25; /* % */
-const CHAR_AMPERSAND = 0x26; /* & */
-const CHAR_SINGLE_QUOTE = 0x27; /* ' */
-const CHAR_ASTERISK = 0x2a; /* * */
-const CHAR_COMMA = 0x2c; /* , */
-const CHAR_MINUS = 0x2d; /* - */
-const CHAR_COLON = 0x3a; /* : */
-const CHAR_GREATER_THAN = 0x3e; /* > */
-const CHAR_QUESTION = 0x3f; /* ? */
-const CHAR_COMMERCIAL_AT = 0x40; /* @ */
-const CHAR_LEFT_SQUARE_BRACKET = 0x5b; /* [ */
-const CHAR_RIGHT_SQUARE_BRACKET = 0x5d; /* ] */
-const CHAR_GRAVE_ACCENT = 0x60; /* ` */
-const CHAR_LEFT_CURLY_BRACKET = 0x7b; /* { */
-const CHAR_VERTICAL_LINE = 0x7c; /* | */
-const CHAR_RIGHT_CURLY_BRACKET = 0x7d; /* } */
-
-const ESCAPE_SEQUENCES: { [char: number]: string } = {};
-
-ESCAPE_SEQUENCES[0x00] = "\\0";
-ESCAPE_SEQUENCES[0x07] = "\\a";
-ESCAPE_SEQUENCES[0x08] = "\\b";
-ESCAPE_SEQUENCES[0x09] = "\\t";
-ESCAPE_SEQUENCES[0x0a] = "\\n";
-ESCAPE_SEQUENCES[0x0b] = "\\v";
-ESCAPE_SEQUENCES[0x0c] = "\\f";
-ESCAPE_SEQUENCES[0x0d] = "\\r";
-ESCAPE_SEQUENCES[0x1b] = "\\e";
-ESCAPE_SEQUENCES[0x22] = '\\"';
-ESCAPE_SEQUENCES[0x5c] = "\\\\";
-ESCAPE_SEQUENCES[0x85] = "\\N";
-ESCAPE_SEQUENCES[0xa0] = "\\_";
-ESCAPE_SEQUENCES[0x2028] = "\\L";
-ESCAPE_SEQUENCES[0x2029] = "\\P";
-
-const DEPRECATED_BOOLEANS_SYNTAX = [
- "y",
- "Y",
- "yes",
- "Yes",
- "YES",
- "on",
- "On",
- "ON",
- "n",
- "N",
- "no",
- "No",
- "NO",
- "off",
- "Off",
- "OFF",
-];
-
-function encodeHex(character: number): string {
- const string = character.toString(16).toUpperCase();
-
- let handle: string;
- let length: number;
- if (character <= 0xff) {
- handle = "x";
- length = 2;
- } else if (character <= 0xffff) {
- handle = "u";
- length = 4;
- } else if (character <= 0xffffffff) {
- handle = "U";
- length = 8;
- } else {
- throw new YAMLError(
- "code point within a string may not be greater than 0xFFFFFFFF",
- );
- }
-
- return `\\${handle}${common.repeat("0", length - string.length)}${string}`;
-}
-
-// Indents every line in a string. Empty lines (\n only) are not indented.
-function indentString(string: string, spaces: number): string {
- const ind = common.repeat(" ", spaces),
- length = string.length;
- let position = 0,
- next = -1,
- result = "",
- line: string;
-
- while (position < length) {
- next = string.indexOf("\n", position);
- if (next === -1) {
- line = string.slice(position);
- position = length;
- } else {
- line = string.slice(position, next + 1);
- position = next + 1;
- }
-
- if (line.length && line !== "\n") result += ind;
-
- result += line;
- }
-
- return result;
-}
-
-function generateNextLine(state: DumperState, level: number): string {
- return `\n${common.repeat(" ", state.indent * level)}`;
-}
-
-function testImplicitResolving(state: DumperState, str: string): boolean {
- let type: Type;
- for (
- let index = 0, length = state.implicitTypes.length;
- index < length;
- index += 1
- ) {
- type = state.implicitTypes[index];
-
- if (type.resolve(str)) {
- return true;
- }
- }
-
- return false;
-}
-
-// [33] s-white ::= s-space | s-tab
-function isWhitespace(c: number): boolean {
- return c === CHAR_SPACE || c === CHAR_TAB;
-}
-
-// Returns true if the character can be printed without escaping.
-// From YAML 1.2: "any allowed characters known to be non-printable
-// should also be escaped. [However,] This isn’t mandatory"
-// Derived from nb-char - \t - #x85 - #xA0 - #x2028 - #x2029.
-function isPrintable(c: number): boolean {
- return (
- (0x00020 <= c && c <= 0x00007e) ||
- (0x000a1 <= c && c <= 0x00d7ff && c !== 0x2028 && c !== 0x2029) ||
- (0x0e000 <= c && c <= 0x00fffd && c !== 0xfeff) /* BOM */ ||
- (0x10000 <= c && c <= 0x10ffff)
- );
-}
-
-// Simplified test for values allowed after the first character in plain style.
-function isPlainSafe(c: number): boolean {
- // Uses a subset of nb-char - c-flow-indicator - ":" - "#"
- // where nb-char ::= c-printable - b-char - c-byte-order-mark.
- return (
- isPrintable(c) &&
- c !== 0xfeff &&
- // - c-flow-indicator
- c !== CHAR_COMMA &&
- c !== CHAR_LEFT_SQUARE_BRACKET &&
- c !== CHAR_RIGHT_SQUARE_BRACKET &&
- c !== CHAR_LEFT_CURLY_BRACKET &&
- c !== CHAR_RIGHT_CURLY_BRACKET &&
- // - ":" - "#"
- c !== CHAR_COLON &&
- c !== CHAR_SHARP
- );
-}
-
-// Simplified test for values allowed as the first character in plain style.
-function isPlainSafeFirst(c: number): boolean {
- // Uses a subset of ns-char - c-indicator
- // where ns-char = nb-char - s-white.
- return (
- isPrintable(c) &&
- c !== 0xfeff &&
- !isWhitespace(c) && // - s-white
- // - (c-indicator ::=
- // “-” | “?” | “:” | “,” | “[” | “]” | “{” | “}”
- c !== CHAR_MINUS &&
- c !== CHAR_QUESTION &&
- c !== CHAR_COLON &&
- c !== CHAR_COMMA &&
- c !== CHAR_LEFT_SQUARE_BRACKET &&
- c !== CHAR_RIGHT_SQUARE_BRACKET &&
- c !== CHAR_LEFT_CURLY_BRACKET &&
- c !== CHAR_RIGHT_CURLY_BRACKET &&
- // | “#” | “&” | “*” | “!” | “|” | “>” | “'” | “"”
- c !== CHAR_SHARP &&
- c !== CHAR_AMPERSAND &&
- c !== CHAR_ASTERISK &&
- c !== CHAR_EXCLAMATION &&
- c !== CHAR_VERTICAL_LINE &&
- c !== CHAR_GREATER_THAN &&
- c !== CHAR_SINGLE_QUOTE &&
- c !== CHAR_DOUBLE_QUOTE &&
- // | “%” | “@” | “`”)
- c !== CHAR_PERCENT &&
- c !== CHAR_COMMERCIAL_AT &&
- c !== CHAR_GRAVE_ACCENT
- );
-}
-
-// Determines whether block indentation indicator is required.
-function needIndentIndicator(string: string): boolean {
- const leadingSpaceRe = /^\n* /;
- return leadingSpaceRe.test(string);
-}
-
-const STYLE_PLAIN = 1,
- STYLE_SINGLE = 2,
- STYLE_LITERAL = 3,
- STYLE_FOLDED = 4,
- STYLE_DOUBLE = 5;
-
-// Determines which scalar styles are possible and returns the preferred style.
-// lineWidth = -1 => no limit.
-// Pre-conditions: str.length > 0.
-// Post-conditions:
-// STYLE_PLAIN or STYLE_SINGLE => no \n are in the string.
-// STYLE_LITERAL => no lines are suitable for folding (or lineWidth is -1).
-// STYLE_FOLDED => a line > lineWidth and can be folded (and lineWidth != -1).
-function chooseScalarStyle(
- string: string,
- singleLineOnly: boolean,
- indentPerLevel: number,
- lineWidth: number,
- testAmbiguousType: (...args: Any[]) => Any,
-): number {
- const shouldTrackWidth = lineWidth !== -1;
- let hasLineBreak = false,
- hasFoldableLine = false, // only checked if shouldTrackWidth
- previousLineBreak = -1, // count the first line correctly
- plain = isPlainSafeFirst(string.charCodeAt(0)) &&
- !isWhitespace(string.charCodeAt(string.length - 1));
-
- let char: number, i: number;
- if (singleLineOnly) {
- // Case: no block styles.
- // Check for disallowed characters to rule out plain and single.
- for (i = 0; i < string.length; i++) {
- char = string.charCodeAt(i);
- if (!isPrintable(char)) {
- return STYLE_DOUBLE;
- }
- plain = plain && isPlainSafe(char);
- }
- } else {
- // Case: block styles permitted.
- for (i = 0; i < string.length; i++) {
- char = string.charCodeAt(i);
- if (char === CHAR_LINE_FEED) {
- hasLineBreak = true;
- // Check if any line can be folded.
- if (shouldTrackWidth) {
- hasFoldableLine = hasFoldableLine ||
- // Foldable line = too long, and not more-indented.
- (i - previousLineBreak - 1 > lineWidth &&
- string[previousLineBreak + 1] !== " ");
- previousLineBreak = i;
- }
- } else if (!isPrintable(char)) {
- return STYLE_DOUBLE;
- }
- plain = plain && isPlainSafe(char);
- }
- // in case the end is missing a \n
- hasFoldableLine = hasFoldableLine ||
- (shouldTrackWidth &&
- i - previousLineBreak - 1 > lineWidth &&
- string[previousLineBreak + 1] !== " ");
- }
- // Although every style can represent \n without escaping, prefer block styles
- // for multiline, since they're more readable and they don't add empty lines.
- // Also prefer folding a super-long line.
- if (!hasLineBreak && !hasFoldableLine) {
- // Strings interpretable as another type have to be quoted;
- // e.g. the string 'true' vs. the boolean true.
- return plain && !testAmbiguousType(string) ? STYLE_PLAIN : STYLE_SINGLE;
- }
- // Edge case: block indentation indicator can only have one digit.
- if (indentPerLevel > 9 && needIndentIndicator(string)) {
- return STYLE_DOUBLE;
- }
- // At this point we know block styles are valid.
- // Prefer literal style unless we want to fold.
- return hasFoldableLine ? STYLE_FOLDED : STYLE_LITERAL;
-}
-
-// Greedy line breaking.
-// Picks the longest line under the limit each time,
-// otherwise settles for the shortest line over the limit.
-// NB. More-indented lines *cannot* be folded, as that would add an extra \n.
-function foldLine(line: string, width: number): string {
- if (line === "" || line[0] === " ") return line;
-
- // Since a more-indented line adds a \n, breaks can't be followed by a space.
- const breakRe = / [^ ]/g; // note: the match index will always be <= length-2.
- let match;
- // start is an inclusive index. end, curr, and next are exclusive.
- let start = 0,
- end,
- curr = 0,
- next = 0;
- let result = "";
-
- // Invariants: 0 <= start <= length-1.
- // 0 <= curr <= next <= max(0, length-2). curr - start <= width.
- // Inside the loop:
- // A match implies length >= 2, so curr and next are <= length-2.
- // tslint:disable-next-line:no-conditional-assignment
- while ((match = breakRe.exec(line))) {
- next = match.index;
- // maintain invariant: curr - start <= width
- if (next - start > width) {
- end = curr > start ? curr : next; // derive end <= length-2
- result += `\n${line.slice(start, end)}`;
- // skip the space that was output as \n
- start = end + 1; // derive start <= length-1
- }
- curr = next;
- }
-
- // By the invariants, start <= length-1, so there is something left over.
- // It is either the whole string or a part starting from non-whitespace.
- result += "\n";
- // Insert a break if the remainder is too long and there is a break available.
- if (line.length - start > width && curr > start) {
- result += `${line.slice(start, curr)}\n${line.slice(curr + 1)}`;
- } else {
- result += line.slice(start);
- }
-
- return result.slice(1); // drop extra \n joiner
-}
-
-// (See the note for writeScalar.)
-function dropEndingNewline(string: string): string {
- return string[string.length - 1] === "\n" ? string.slice(0, -1) : string;
-}
-
-// Note: a long line without a suitable break point will exceed the width limit.
-// Pre-conditions: every char in str isPrintable, str.length > 0, width > 0.
-function foldString(string: string, width: number): string {
- // In folded style, $k$ consecutive newlines output as $k+1$ newlines—
- // unless they're before or after a more-indented line, or at the very
- // beginning or end, in which case $k$ maps to $k$.
- // Therefore, parse each chunk as newline(s) followed by a content line.
- const lineRe = /(\n+)([^\n]*)/g;
-
- // first line (possibly an empty line)
- let result = ((): string => {
- let nextLF = string.indexOf("\n");
- nextLF = nextLF !== -1 ? nextLF : string.length;
- lineRe.lastIndex = nextLF;
- // eslint-disable-next-line @typescript-eslint/no-use-before-define
- return foldLine(string.slice(0, nextLF), width);
- })();
- // If we haven't reached the first content line yet, don't add an extra \n.
- let prevMoreIndented = string[0] === "\n" || string[0] === " ";
- let moreIndented;
-
- // rest of the lines
- let match;
- // tslint:disable-next-line:no-conditional-assignment
- while ((match = lineRe.exec(string))) {
- const prefix = match[1],
- line = match[2];
- moreIndented = line[0] === " ";
- result += prefix +
- (!prevMoreIndented && !moreIndented && line !== "" ? "\n" : "") +
- // eslint-disable-next-line @typescript-eslint/no-use-before-define
- foldLine(line, width);
- prevMoreIndented = moreIndented;
- }
-
- return result;
-}
-
-// Escapes a double-quoted string.
-function escapeString(string: string): string {
- let result = "";
- let char, nextChar;
- let escapeSeq;
-
- for (let i = 0; i < string.length; i++) {
- char = string.charCodeAt(i);
- // Check for surrogate pairs (reference Unicode 3.0 section "3.7 Surrogates").
- if (char >= 0xd800 && char <= 0xdbff /* high surrogate */) {
- nextChar = string.charCodeAt(i + 1);
- if (nextChar >= 0xdc00 && nextChar <= 0xdfff /* low surrogate */) {
- // Combine the surrogate pair and store it escaped.
- result += encodeHex(
- (char - 0xd800) * 0x400 + nextChar - 0xdc00 + 0x10000,
- );
- // Advance index one extra since we already used that char here.
- i++;
- continue;
- }
- }
- escapeSeq = ESCAPE_SEQUENCES[char];
- result += !escapeSeq && isPrintable(char)
- ? string[i]
- : escapeSeq || encodeHex(char);
- }
-
- return result;
-}
-
-// Pre-conditions: string is valid for a block scalar, 1 <= indentPerLevel <= 9.
-function blockHeader(string: string, indentPerLevel: number): string {
- const indentIndicator = needIndentIndicator(string)
- ? String(indentPerLevel)
- : "";
-
- // note the special case: the string '\n' counts as a "trailing" empty line.
- const clip = string[string.length - 1] === "\n";
- const keep = clip && (string[string.length - 2] === "\n" || string === "\n");
- const chomp = keep ? "+" : clip ? "" : "-";
-
- return `${indentIndicator}${chomp}\n`;
-}
-
-// Note: line breaking/folding is implemented for only the folded style.
-// NB. We drop the last trailing newline (if any) of a returned block scalar
-// since the dumper adds its own newline. This always works:
-// • No ending newline => unaffected; already using strip "-" chomping.
-// • Ending newline => removed then restored.
-// Importantly, this keeps the "+" chomp indicator from gaining an extra line.
-function writeScalar(
- state: DumperState,
- string: string,
- level: number,
- iskey: boolean,
-): void {
- state.dump = ((): string => {
- if (string.length === 0) {
- return "''";
- }
- if (
- !state.noCompatMode &&
- DEPRECATED_BOOLEANS_SYNTAX.indexOf(string) !== -1
- ) {
- return `'${string}'`;
- }
-
- const indent = state.indent * Math.max(1, level); // no 0-indent scalars
- // As indentation gets deeper, let the width decrease monotonically
- // to the lower bound min(state.lineWidth, 40).
- // Note that this implies
- // state.lineWidth ≤ 40 + state.indent: width is fixed at the lower bound.
- // state.lineWidth > 40 + state.indent: width decreases until the lower
- // bound.
- // This behaves better than a constant minimum width which disallows
- // narrower options, or an indent threshold which causes the width
- // to suddenly increase.
- const lineWidth = state.lineWidth === -1
- ? -1
- : Math.max(Math.min(state.lineWidth, 40), state.lineWidth - indent);
-
- // Without knowing if keys are implicit/explicit,
- // assume implicit for safety.
- const singleLineOnly = iskey ||
- // No block styles in flow mode.
- (state.flowLevel > -1 && level >= state.flowLevel);
- function testAmbiguity(str: string): boolean {
- return testImplicitResolving(state, str);
- }
-
- switch (
- chooseScalarStyle(
- string,
- singleLineOnly,
- state.indent,
- lineWidth,
- testAmbiguity,
- )
- ) {
- case STYLE_PLAIN:
- return string;
- case STYLE_SINGLE:
- return `'${string.replace(/'/g, "''")}'`;
- case STYLE_LITERAL:
- return `|${blockHeader(string, state.indent)}${
- dropEndingNewline(
- indentString(string, indent),
- )
- }`;
- case STYLE_FOLDED:
- return `>${blockHeader(string, state.indent)}${
- dropEndingNewline(
- indentString(foldString(string, lineWidth), indent),
- )
- }`;
- case STYLE_DOUBLE:
- return `"${escapeString(string)}"`;
- default:
- throw new YAMLError("impossible error: invalid scalar style");
- }
- })();
-}
-
-function writeFlowSequence(
- state: DumperState,
- level: number,
- object: Any,
-): void {
- let _result = "";
- const _tag = state.tag;
-
- for (let index = 0, length = object.length; index < length; index += 1) {
- // Write only valid elements.
- // eslint-disable-next-line @typescript-eslint/no-use-before-define
- if (writeNode(state, level, object[index], false, false)) {
- if (index !== 0) _result += `,${!state.condenseFlow ? " " : ""}`;
- _result += state.dump;
- }
- }
-
- state.tag = _tag;
- state.dump = `[${_result}]`;
-}
-
-function writeBlockSequence(
- state: DumperState,
- level: number,
- object: Any,
- compact = false,
-): void {
- let _result = "";
- const _tag = state.tag;
-
- for (let index = 0, length = object.length; index < length; index += 1) {
- // Write only valid elements.
- // eslint-disable-next-line @typescript-eslint/no-use-before-define
- if (writeNode(state, level + 1, object[index], true, true)) {
- if (!compact || index !== 0) {
- _result += generateNextLine(state, level);
- }
-
- if (state.dump && CHAR_LINE_FEED === state.dump.charCodeAt(0)) {
- _result += "-";
- } else {
- _result += "- ";
- }
-
- _result += state.dump;
- }
- }
-
- state.tag = _tag;
- state.dump = _result || "[]"; // Empty sequence if no valid values.
-}
-
-function writeFlowMapping(
- state: DumperState,
- level: number,
- object: Any,
-): void {
- let _result = "";
- const _tag = state.tag,
- objectKeyList = Object.keys(object);
-
- let pairBuffer: string, objectKey: string, objectValue: Any;
- for (
- let index = 0, length = objectKeyList.length;
- index < length;
- index += 1
- ) {
- pairBuffer = state.condenseFlow ? '"' : "";
-
- if (index !== 0) pairBuffer += ", ";
-
- objectKey = objectKeyList[index];
- objectValue = object[objectKey];
-
- // eslint-disable-next-line @typescript-eslint/no-use-before-define
- if (!writeNode(state, level, objectKey, false, false)) {
- continue; // Skip this pair because of invalid key;
- }
-
- if (state.dump.length > 1024) pairBuffer += "? ";
-
- pairBuffer += `${state.dump}${state.condenseFlow ? '"' : ""}:${
- state.condenseFlow ? "" : " "
- }`;
-
- // eslint-disable-next-line @typescript-eslint/no-use-before-define
- if (!writeNode(state, level, objectValue, false, false)) {
- continue; // Skip this pair because of invalid value.
- }
-
- pairBuffer += state.dump;
-
- // Both key and value are valid.
- _result += pairBuffer;
- }
-
- state.tag = _tag;
- state.dump = `{${_result}}`;
-}
-
-function writeBlockMapping(
- state: DumperState,
- level: number,
- object: Any,
- compact = false,
-): void {
- const _tag = state.tag,
- objectKeyList = Object.keys(object);
- let _result = "";
-
- // Allow sorting keys so that the output file is deterministic
- if (state.sortKeys === true) {
- // Default sorting
- objectKeyList.sort();
- } else if (typeof state.sortKeys === "function") {
- // Custom sort function
- objectKeyList.sort(state.sortKeys);
- } else if (state.sortKeys) {
- // Something is wrong
- throw new YAMLError("sortKeys must be a boolean or a function");
- }
-
- let pairBuffer = "",
- objectKey: string,
- objectValue: Any,
- explicitPair: boolean;
- for (
- let index = 0, length = objectKeyList.length;
- index < length;
- index += 1
- ) {
- pairBuffer = "";
-
- if (!compact || index !== 0) {
- pairBuffer += generateNextLine(state, level);
- }
-
- objectKey = objectKeyList[index];
- objectValue = object[objectKey];
-
- // eslint-disable-next-line @typescript-eslint/no-use-before-define
- if (!writeNode(state, level + 1, objectKey, true, true, true)) {
- continue; // Skip this pair because of invalid key.
- }
-
- explicitPair = (state.tag !== null && state.tag !== "?") ||
- (state.dump && state.dump.length > 1024);
-
- if (explicitPair) {
- if (state.dump && CHAR_LINE_FEED === state.dump.charCodeAt(0)) {
- pairBuffer += "?";
- } else {
- pairBuffer += "? ";
- }
- }
-
- pairBuffer += state.dump;
-
- if (explicitPair) {
- pairBuffer += generateNextLine(state, level);
- }
-
- // eslint-disable-next-line @typescript-eslint/no-use-before-define
- if (!writeNode(state, level + 1, objectValue, true, explicitPair)) {
- continue; // Skip this pair because of invalid value.
- }
-
- if (state.dump && CHAR_LINE_FEED === state.dump.charCodeAt(0)) {
- pairBuffer += ":";
- } else {
- pairBuffer += ": ";
- }
-
- pairBuffer += state.dump;
-
- // Both key and value are valid.
- _result += pairBuffer;
- }
-
- state.tag = _tag;
- state.dump = _result || "{}"; // Empty mapping if no valid pairs.
-}
-
-function detectType(
- state: DumperState,
- object: Any,
- explicit = false,
-): boolean {
- const typeList = explicit ? state.explicitTypes : state.implicitTypes;
-
- let type: Type;
- let style: StyleVariant;
- let _result: string;
- for (let index = 0, length = typeList.length; index < length; index += 1) {
- type = typeList[index];
-
- if (
- (type.instanceOf || type.predicate) &&
- (!type.instanceOf ||
- (typeof object === "object" && object instanceof type.instanceOf)) &&
- (!type.predicate || type.predicate(object))
- ) {
- state.tag = explicit ? type.tag : "?";
-
- if (type.represent) {
- style = state.styleMap[type.tag] || type.defaultStyle;
-
- if (_toString.call(type.represent) === "[object Function]") {
- _result = (type.represent as RepresentFn)(object, style);
- } else if (_hasOwnProperty.call(type.represent, style)) {
- _result = (type.represent as ArrayObject<RepresentFn>)[style](
- object,
- style,
- );
- } else {
- throw new YAMLError(
- `!<${type.tag}> tag resolver accepts not "${style}" style`,
- );
- }
-
- state.dump = _result;
- }
-
- return true;
- }
- }
-
- return false;
-}
-
-// Serializes `object` and writes it to global `result`.
-// Returns true on success, or false on invalid object.
-//
-function writeNode(
- state: DumperState,
- level: number,
- object: Any,
- block: boolean,
- compact: boolean,
- iskey = false,
-): boolean {
- state.tag = null;
- state.dump = object;
-
- if (!detectType(state, object, false)) {
- detectType(state, object, true);
- }
-
- const type = _toString.call(state.dump);
-
- if (block) {
- block = state.flowLevel < 0 || state.flowLevel > level;
- }
-
- const objectOrArray = type === "[object Object]" || type === "[object Array]";
-
- let duplicateIndex = -1;
- let duplicate = false;
- if (objectOrArray) {
- duplicateIndex = state.duplicates.indexOf(object);
- duplicate = duplicateIndex !== -1;
- }
-
- if (
- (state.tag !== null && state.tag !== "?") ||
- duplicate ||
- (state.indent !== 2 && level > 0)
- ) {
- compact = false;
- }
-
- if (duplicate && state.usedDuplicates[duplicateIndex]) {
- state.dump = `*ref_${duplicateIndex}`;
- } else {
- if (objectOrArray && duplicate && !state.usedDuplicates[duplicateIndex]) {
- state.usedDuplicates[duplicateIndex] = true;
- }
- if (type === "[object Object]") {
- if (block && Object.keys(state.dump).length !== 0) {
- writeBlockMapping(state, level, state.dump, compact);
- if (duplicate) {
- state.dump = `&ref_${duplicateIndex}${state.dump}`;
- }
- } else {
- writeFlowMapping(state, level, state.dump);
- if (duplicate) {
- state.dump = `&ref_${duplicateIndex} ${state.dump}`;
- }
- }
- } else if (type === "[object Array]") {
- const arrayLevel = state.noArrayIndent && level > 0 ? level - 1 : level;
- if (block && state.dump.length !== 0) {
- writeBlockSequence(state, arrayLevel, state.dump, compact);
- if (duplicate) {
- state.dump = `&ref_${duplicateIndex}${state.dump}`;
- }
- } else {
- writeFlowSequence(state, arrayLevel, state.dump);
- if (duplicate) {
- state.dump = `&ref_${duplicateIndex} ${state.dump}`;
- }
- }
- } else if (type === "[object String]") {
- if (state.tag !== "?") {
- writeScalar(state, state.dump, level, iskey);
- }
- } else {
- if (state.skipInvalid) return false;
- throw new YAMLError(`unacceptable kind of an object to dump ${type}`);
- }
-
- if (state.tag !== null && state.tag !== "?") {
- state.dump = `!<${state.tag}> ${state.dump}`;
- }
- }
-
- return true;
-}
-
-function inspectNode(
- object: Any,
- objects: Any[],
- duplicatesIndexes: number[],
-): void {
- if (object !== null && typeof object === "object") {
- const index = objects.indexOf(object);
- if (index !== -1) {
- if (duplicatesIndexes.indexOf(index) === -1) {
- duplicatesIndexes.push(index);
- }
- } else {
- objects.push(object);
-
- if (Array.isArray(object)) {
- for (let idx = 0, length = object.length; idx < length; idx += 1) {
- inspectNode(object[idx], objects, duplicatesIndexes);
- }
- } else {
- const objectKeyList = Object.keys(object);
-
- for (
- let idx = 0, length = objectKeyList.length;
- idx < length;
- idx += 1
- ) {
- inspectNode(object[objectKeyList[idx]], objects, duplicatesIndexes);
- }
- }
- }
- }
-}
-
-function getDuplicateReferences(
- object: Record<string, unknown>,
- state: DumperState,
-): void {
- const objects: Any[] = [],
- duplicatesIndexes: number[] = [];
-
- inspectNode(object, objects, duplicatesIndexes);
-
- const length = duplicatesIndexes.length;
- for (let index = 0; index < length; index += 1) {
- state.duplicates.push(objects[duplicatesIndexes[index]]);
- }
- state.usedDuplicates = new Array(length);
-}
-
-export function dump(input: Any, options?: DumperStateOptions): string {
- options = options || {};
-
- const state = new DumperState(options);
-
- if (!state.noRefs) getDuplicateReferences(input, state);
-
- if (writeNode(state, 0, input, true, true)) return `${state.dump}\n`;
-
- return "";
-}
generated by cgit v1.2.3 (git 2.25.1) at 2025-07-30 11:58:38 +0000