node: updatemain

1 files changed, 0 insertions, 965 deletions

diff --git a/node_modules/js-yaml/lib/dumper.js b/node_modules/js-yaml/lib/dumper.js
deleted file mode 100644
index f357a6ae..00000000
--- a/node_modules/js-yaml/lib/dumper.js
+++ /dev/null
@@ -1,965 +0,0 @@
-'use strict';
-
-/*eslint-disable no-use-before-define*/
-
-var common              = require('./common');
-var YAMLException       = require('./exception');
-var DEFAULT_SCHEMA      = require('./schema/default');
-
-var _toString       = Object.prototype.toString;
-var _hasOwnProperty = Object.prototype.hasOwnProperty;
-
-var CHAR_BOM                  = 0xFEFF;
-var CHAR_TAB                  = 0x09; /* Tab */
-var CHAR_LINE_FEED            = 0x0A; /* LF */
-var CHAR_CARRIAGE_RETURN      = 0x0D; /* CR */
-var CHAR_SPACE                = 0x20; /* Space */
-var CHAR_EXCLAMATION          = 0x21; /* ! */
-var CHAR_DOUBLE_QUOTE         = 0x22; /* " */
-var CHAR_SHARP                = 0x23; /* # */
-var CHAR_PERCENT              = 0x25; /* % */
-var CHAR_AMPERSAND            = 0x26; /* & */
-var CHAR_SINGLE_QUOTE         = 0x27; /* ' */
-var CHAR_ASTERISK             = 0x2A; /* * */
-var CHAR_COMMA                = 0x2C; /* , */
-var CHAR_MINUS                = 0x2D; /* - */
-var CHAR_COLON                = 0x3A; /* : */
-var CHAR_EQUALS               = 0x3D; /* = */
-var CHAR_GREATER_THAN         = 0x3E; /* > */
-var CHAR_QUESTION             = 0x3F; /* ? */
-var CHAR_COMMERCIAL_AT        = 0x40; /* @ */
-var CHAR_LEFT_SQUARE_BRACKET  = 0x5B; /* [ */
-var CHAR_RIGHT_SQUARE_BRACKET = 0x5D; /* ] */
-var CHAR_GRAVE_ACCENT         = 0x60; /* ` */
-var CHAR_LEFT_CURLY_BRACKET   = 0x7B; /* { */
-var CHAR_VERTICAL_LINE        = 0x7C; /* | */
-var CHAR_RIGHT_CURLY_BRACKET  = 0x7D; /* } */
-
-var ESCAPE_SEQUENCES = {};
-
-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';
-
-var DEPRECATED_BOOLEANS_SYNTAX = [
-  'y', 'Y', 'yes', 'Yes', 'YES', 'on', 'On', 'ON',
-  'n', 'N', 'no', 'No', 'NO', 'off', 'Off', 'OFF'
-];
-
-var DEPRECATED_BASE60_SYNTAX = /^[-+]?[0-9_]+(?::[0-9_]+)+(?:\.[0-9_]*)?$/;
-
-function compileStyleMap(schema, map) {
-  var result, keys, index, length, tag, style, type;
-
-  if (map === null) return {};
-
-  result = {};
-  keys = Object.keys(map);
-
-  for (index = 0, length = keys.length; index < length; index += 1) {
-    tag = keys[index];
-    style = String(map[tag]);
-
-    if (tag.slice(0, 2) === '!!') {
-      tag = 'tag:yaml.org,2002:' + tag.slice(2);
-    }
-    type = schema.compiledTypeMap['fallback'][tag];
-
-    if (type && _hasOwnProperty.call(type.styleAliases, style)) {
-      style = type.styleAliases[style];
-    }
-
-    result[tag] = style;
-  }
-
-  return result;
-}
-
-function encodeHex(character) {
-  var string, handle, length;
-
-  string = character.toString(16).toUpperCase();
-
-  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 YAMLException('code point within a string may not be greater than 0xFFFFFFFF');
-  }
-
-  return '\\' + handle + common.repeat('0', length - string.length) + string;
-}
-
-
-var QUOTING_TYPE_SINGLE = 1,
-    QUOTING_TYPE_DOUBLE = 2;
-
-function State(options) {
-  this.schema        = options['schema'] || DEFAULT_SCHEMA;
-  this.indent        = Math.max(1, (options['indent'] || 2));
-  this.noArrayIndent = options['noArrayIndent'] || false;
-  this.skipInvalid   = options['skipInvalid'] || false;
-  this.flowLevel     = (common.isNothing(options['flowLevel']) ? -1 : options['flowLevel']);
-  this.styleMap      = compileStyleMap(this.schema, options['styles'] || null);
-  this.sortKeys      = options['sortKeys'] || false;
-  this.lineWidth     = options['lineWidth'] || 80;
-  this.noRefs        = options['noRefs'] || false;
-  this.noCompatMode  = options['noCompatMode'] || false;
-  this.condenseFlow  = options['condenseFlow'] || false;
-  this.quotingType   = options['quotingType'] === '"' ? QUOTING_TYPE_DOUBLE : QUOTING_TYPE_SINGLE;
-  this.forceQuotes   = options['forceQuotes'] || false;
-  this.replacer      = typeof options['replacer'] === 'function' ? options['replacer'] : null;
-
-  this.implicitTypes = this.schema.compiledImplicit;
-  this.explicitTypes = this.schema.compiledExplicit;
-
-  this.tag = null;
-  this.result = '';
-
-  this.duplicates = [];
-  this.usedDuplicates = null;
-}
-
-// Indents every line in a string. Empty lines (\n only) are not indented.
-function indentString(string, spaces) {
-  var ind = common.repeat(' ', spaces),
-      position = 0,
-      next = -1,
-      result = '',
-      line,
-      length = string.length;
-
-  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, level) {
-  return '\n' + common.repeat(' ', state.indent * level);
-}
-
-function testImplicitResolving(state, str) {
-  var index, length, type;
-
-  for (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) {
-  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) {
-  return  (0x00020 <= c && c <= 0x00007E)
-      || ((0x000A1 <= c && c <= 0x00D7FF) && c !== 0x2028 && c !== 0x2029)
-      || ((0x0E000 <= c && c <= 0x00FFFD) && c !== CHAR_BOM)
-      ||  (0x10000 <= c && c <= 0x10FFFF);
-}
-
-// [34] ns-char ::= nb-char - s-white
-// [27] nb-char ::= c-printable - b-char - c-byte-order-mark
-// [26] b-char  ::= b-line-feed | b-carriage-return
-// Including s-white (for some reason, examples doesn't match specs in this aspect)
-// ns-char ::= c-printable - b-line-feed - b-carriage-return - c-byte-order-mark
-function isNsCharOrWhitespace(c) {
-  return isPrintable(c)
-    && c !== CHAR_BOM
-    // - b-char
-    && c !== CHAR_CARRIAGE_RETURN
-    && c !== CHAR_LINE_FEED;
-}
-
-// [127]  ns-plain-safe(c) ::= c = flow-out  ⇒ ns-plain-safe-out
-//                             c = flow-in   ⇒ ns-plain-safe-in
-//                             c = block-key ⇒ ns-plain-safe-out
-//                             c = flow-key  ⇒ ns-plain-safe-in
-// [128] ns-plain-safe-out ::= ns-char
-// [129]  ns-plain-safe-in ::= ns-char - c-flow-indicator
-// [130]  ns-plain-char(c) ::=  ( ns-plain-safe(c) - “:” - “#” )
-//                            | ( /* An ns-char preceding */ “#” )
-//                            | ( “:” /* Followed by an ns-plain-safe(c) */ )
-function isPlainSafe(c, prev, inblock) {
-  var cIsNsCharOrWhitespace = isNsCharOrWhitespace(c);
-  var cIsNsChar = cIsNsCharOrWhitespace && !isWhitespace(c);
-  return (
-    // ns-plain-safe
-    inblock ? // c = flow-in
-      cIsNsCharOrWhitespace
-      : cIsNsCharOrWhitespace
-        // - 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
-  )
-    // ns-plain-char
-    && c !== CHAR_SHARP // false on '#'
-    && !(prev === CHAR_COLON && !cIsNsChar) // false on ': '
-    || (isNsCharOrWhitespace(prev) && !isWhitespace(prev) && c === CHAR_SHARP) // change to true on '[^ ]#'
-    || (prev === CHAR_COLON && cIsNsChar); // change to true on ':[^ ]'
-}
-
-// Simplified test for values allowed as the first character in plain style.
-function isPlainSafeFirst(c) {
-  // Uses a subset of ns-char - c-indicator
-  // where ns-char = nb-char - s-white.
-  // No support of ( ( “?” | “:” | “-” ) /* Followed by an ns-plain-safe(c)) */ ) part
-  return isPrintable(c) && c !== CHAR_BOM
-    && !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_EQUALS
-    && c !== CHAR_GREATER_THAN
-    && c !== CHAR_SINGLE_QUOTE
-    && c !== CHAR_DOUBLE_QUOTE
-    // | “%” | “@” | “`”)
-    && c !== CHAR_PERCENT
-    && c !== CHAR_COMMERCIAL_AT
-    && c !== CHAR_GRAVE_ACCENT;
-}
-
-// Simplified test for values allowed as the last character in plain style.
-function isPlainSafeLast(c) {
-  // just not whitespace or colon, it will be checked to be plain character later
-  return !isWhitespace(c) && c !== CHAR_COLON;
-}
-
-// Same as 'string'.codePointAt(pos), but works in older browsers.
-function codePointAt(string, pos) {
-  var first = string.charCodeAt(pos), second;
-  if (first >= 0xD800 && first <= 0xDBFF && pos + 1 < string.length) {
-    second = string.charCodeAt(pos + 1);
-    if (second >= 0xDC00 && second <= 0xDFFF) {
-      // https://mathiasbynens.be/notes/javascript-encoding#surrogate-formulae
-      return (first - 0xD800) * 0x400 + second - 0xDC00 + 0x10000;
-    }
-  }
-  return first;
-}
-
-// Determines whether block indentation indicator is required.
-function needIndentIndicator(string) {
-  var leadingSpaceRe = /^\n* /;
-  return leadingSpaceRe.test(string);
-}
-
-var 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, singleLineOnly, indentPerLevel, lineWidth,
-  testAmbiguousType, quotingType, forceQuotes, inblock) {
-
-  var i;
-  var char = 0;
-  var prevChar = null;
-  var hasLineBreak = false;
-  var hasFoldableLine = false; // only checked if shouldTrackWidth
-  var shouldTrackWidth = lineWidth !== -1;
-  var previousLineBreak = -1; // count the first line correctly
-  var plain = isPlainSafeFirst(codePointAt(string, 0))
-          && isPlainSafeLast(codePointAt(string, string.length - 1));
-
-  if (singleLineOnly || forceQuotes) {
-    // Case: no block styles.
-    // Check for disallowed characters to rule out plain and single.
-    for (i = 0; i < string.length; char >= 0x10000 ? i += 2 : i++) {
-      char = codePointAt(string, i);
-      if (!isPrintable(char)) {
-        return STYLE_DOUBLE;
-      }
-      plain = plain && isPlainSafe(char, prevChar, inblock);
-      prevChar = char;
-    }
-  } else {
-    // Case: block styles permitted.
-    for (i = 0; i < string.length; char >= 0x10000 ? i += 2 : i++) {
-      char = codePointAt(string, 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, prevChar, inblock);
-      prevChar = 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.
-    if (plain && !forceQuotes && !testAmbiguousType(string)) {
-      return STYLE_PLAIN;
-    }
-    return quotingType === QUOTING_TYPE_DOUBLE ? STYLE_DOUBLE : 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.
-  if (!forceQuotes) {
-    return hasFoldableLine ? STYLE_FOLDED : STYLE_LITERAL;
-  }
-  return quotingType === QUOTING_TYPE_DOUBLE ? STYLE_DOUBLE : STYLE_SINGLE;
-}
-
-// 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, string, level, iskey, inblock) {
-  state.dump = (function () {
-    if (string.length === 0) {
-      return state.quotingType === QUOTING_TYPE_DOUBLE ? '""' : "''";
-    }
-    if (!state.noCompatMode) {
-      if (DEPRECATED_BOOLEANS_SYNTAX.indexOf(string) !== -1 || DEPRECATED_BASE60_SYNTAX.test(string)) {
-        return state.quotingType === QUOTING_TYPE_DOUBLE ? ('"' + string + '"') : ("'" + string + "'");
-      }
-    }
-
-    var 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.
-    var 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.
-    var singleLineOnly = iskey
-      // No block styles in flow mode.
-      || (state.flowLevel > -1 && level >= state.flowLevel);
-    function testAmbiguity(string) {
-      return testImplicitResolving(state, string);
-    }
-
-    switch (chooseScalarStyle(string, singleLineOnly, state.indent, lineWidth,
-      testAmbiguity, state.quotingType, state.forceQuotes && !iskey, inblock)) {
-
-      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, lineWidth) + '"';
-      default:
-        throw new YAMLException('impossible error: invalid scalar style');
-    }
-  }());
-}
-
-// Pre-conditions: string is valid for a block scalar, 1 <= indentPerLevel <= 9.
-function blockHeader(string, indentPerLevel) {
-  var indentIndicator = needIndentIndicator(string) ? String(indentPerLevel) : '';
-
-  // note the special case: the string '\n' counts as a "trailing" empty line.
-  var clip =          string[string.length - 1] === '\n';
-  var keep = clip && (string[string.length - 2] === '\n' || string === '\n');
-  var chomp = keep ? '+' : (clip ? '' : '-');
-
-  return indentIndicator + chomp + '\n';
-}
-
-// (See the note for writeScalar.)
-function dropEndingNewline(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, width) {
-  // 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.
-  var lineRe = /(\n+)([^\n]*)/g;
-
-  // first line (possibly an empty line)
-  var result = (function () {
-    var nextLF = string.indexOf('\n');
-    nextLF = nextLF !== -1 ? nextLF : string.length;
-    lineRe.lastIndex = nextLF;
-    return foldLine(string.slice(0, nextLF), width);
-  }());
-  // If we haven't reached the first content line yet, don't add an extra \n.
-  var prevMoreIndented = string[0] === '\n' || string[0] === ' ';
-  var moreIndented;
-
-  // rest of the lines
-  var match;
-  while ((match = lineRe.exec(string))) {
-    var prefix = match[1], line = match[2];
-    moreIndented = (line[0] === ' ');
-    result += prefix
-      + (!prevMoreIndented && !moreIndented && line !== ''
-        ? '\n' : '')
-      + foldLine(line, width);
-    prevMoreIndented = moreIndented;
-  }
-
-  return result;
-}
-
-// 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, width) {
-  if (line === '' || line[0] === ' ') return line;
-
-  // Since a more-indented line adds a \n, breaks can't be followed by a space.
-  var breakRe = / [^ ]/g; // note: the match index will always be <= length-2.
-  var match;
-  // start is an inclusive index. end, curr, and next are exclusive.
-  var start = 0, end, curr = 0, next = 0;
-  var 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.
-  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
-}
-
-// Escapes a double-quoted string.
-function escapeString(string) {
-  var result = '';
-  var char = 0;
-  var escapeSeq;
-
-  for (var i = 0; i < string.length; char >= 0x10000 ? i += 2 : i++) {
-    char = codePointAt(string, i);
-    escapeSeq = ESCAPE_SEQUENCES[char];
-
-    if (!escapeSeq && isPrintable(char)) {
-      result += string[i];
-      if (char >= 0x10000) result += string[i + 1];
-    } else {
-      result += escapeSeq || encodeHex(char);
-    }
-  }
-
-  return result;
-}
-
-function writeFlowSequence(state, level, object) {
-  var _result = '',
-      _tag    = state.tag,
-      index,
-      length,
-      value;
-
-  for (index = 0, length = object.length; index < length; index += 1) {
-    value = object[index];
-
-    if (state.replacer) {
-      value = state.replacer.call(object, String(index), value);
-    }
-
-    // Write only valid elements, put null instead of invalid elements.
-    if (writeNode(state, level, value, false, false) ||
-        (typeof value === 'undefined' &&
-         writeNode(state, level, null, false, false))) {
-
-      if (_result !== '') _result += ',' + (!state.condenseFlow ? ' ' : '');
-      _result += state.dump;
-    }
-  }
-
-  state.tag = _tag;
-  state.dump = '[' + _result + ']';
-}
-
-function writeBlockSequence(state, level, object, compact) {
-  var _result = '',
-      _tag    = state.tag,
-      index,
-      length,
-      value;
-
-  for (index = 0, length = object.length; index < length; index += 1) {
-    value = object[index];
-
-    if (state.replacer) {
-      value = state.replacer.call(object, String(index), value);
-    }
-
-    // Write only valid elements, put null instead of invalid elements.
-    if (writeNode(state, level + 1, value, true, true, false, true) ||
-        (typeof value === 'undefined' &&
-         writeNode(state, level + 1, null, true, true, false, true))) {
-
-      if (!compact || _result !== '') {
-        _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, level, object) {
-  var _result       = '',
-      _tag          = state.tag,
-      objectKeyList = Object.keys(object),
-      index,
-      length,
-      objectKey,
-      objectValue,
-      pairBuffer;
-
-  for (index = 0, length = objectKeyList.length; index < length; index += 1) {
-
-    pairBuffer = '';
-    if (_result !== '') pairBuffer += ', ';
-
-    if (state.condenseFlow) pairBuffer += '"';
-
-    objectKey = objectKeyList[index];
-    objectValue = object[objectKey];
-
-    if (state.replacer) {
-      objectValue = state.replacer.call(object, objectKey, objectValue);
-    }
-
-    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 ? '' : ' ');
-
-    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, level, object, compact) {
-  var _result       = '',
-      _tag          = state.tag,
-      objectKeyList = Object.keys(object),
-      index,
-      length,
-      objectKey,
-      objectValue,
-      explicitPair,
-      pairBuffer;
-
-  // 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 YAMLException('sortKeys must be a boolean or a function');
-  }
-
-  for (index = 0, length = objectKeyList.length; index < length; index += 1) {
-    pairBuffer = '';
-
-    if (!compact || _result !== '') {
-      pairBuffer += generateNextLine(state, level);
-    }
-
-    objectKey = objectKeyList[index];
-    objectValue = object[objectKey];
-
-    if (state.replacer) {
-      objectValue = state.replacer.call(object, objectKey, objectValue);
-    }
-
-    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);
-    }
-
-    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, object, explicit) {
-  var _result, typeList, index, length, type, style;
-
-  typeList = explicit ? state.explicitTypes : state.implicitTypes;
-
-  for (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))) {
-
-      if (explicit) {
-        if (type.multi && type.representName) {
-          state.tag = type.representName(object);
-        } else {
-          state.tag = type.tag;
-        }
-      } else {
-        state.tag = '?';
-      }
-
-      if (type.represent) {
-        style = state.styleMap[type.tag] || type.defaultStyle;
-
-        if (_toString.call(type.represent) === '[object Function]') {
-          _result = type.represent(object, style);
-        } else if (_hasOwnProperty.call(type.represent, style)) {
-          _result = type.represent[style](object, style);
-        } else {
-          throw new YAMLException('!<' + 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, level, object, block, compact, iskey, isblockseq) {
-  state.tag = null;
-  state.dump = object;
-
-  if (!detectType(state, object, false)) {
-    detectType(state, object, true);
-  }
-
-  var type = _toString.call(state.dump);
-  var inblock = block;
-  var tagStr;
-
-  if (block) {
-    block = (state.flowLevel < 0 || state.flowLevel > level);
-  }
-
-  var objectOrArray = type === '[object Object]' || type === '[object Array]',
-      duplicateIndex,
-      duplicate;
-
-  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]') {
-      if (block && (state.dump.length !== 0)) {
-        if (state.noArrayIndent && !isblockseq && level > 0) {
-          writeBlockSequence(state, level - 1, state.dump, compact);
-        } else {
-          writeBlockSequence(state, level, state.dump, compact);
-        }
-        if (duplicate) {
-          state.dump = '&ref_' + duplicateIndex + state.dump;
-        }
-      } else {
-        writeFlowSequence(state, level, state.dump);
-        if (duplicate) {
-          state.dump = '&ref_' + duplicateIndex + ' ' + state.dump;
-        }
-      }
-    } else if (type === '[object String]') {
-      if (state.tag !== '?') {
-        writeScalar(state, state.dump, level, iskey, inblock);
-      }
-    } else if (type === '[object Undefined]') {
-      return false;
-    } else {
-      if (state.skipInvalid) return false;
-      throw new YAMLException('unacceptable kind of an object to dump ' + type);
-    }
-
-    if (state.tag !== null && state.tag !== '?') {
-      // Need to encode all characters except those allowed by the spec:
-      //
-      // [35] ns-dec-digit    ::=  [#x30-#x39] /* 0-9 */
-      // [36] ns-hex-digit    ::=  ns-dec-digit
-      //                         | [#x41-#x46] /* A-F */ | [#x61-#x66] /* a-f */
-      // [37] ns-ascii-letter ::=  [#x41-#x5A] /* A-Z */ | [#x61-#x7A] /* a-z */
-      // [38] ns-word-char    ::=  ns-dec-digit | ns-ascii-letter | “-”
-      // [39] ns-uri-char     ::=  “%” ns-hex-digit ns-hex-digit | ns-word-char | “#”
-      //                         | “;” | “/” | “?” | “:” | “@” | “&” | “=” | “+” | “$” | “,”
-      //                         | “_” | “.” | “!” | “~” | “*” | “'” | “(” | “)” | “[” | “]”
-      //
-      // Also need to encode '!' because it has special meaning (end of tag prefix).
-      //
-      tagStr = encodeURI(
-        state.tag[0] === '!' ? state.tag.slice(1) : state.tag
-      ).replace(/!/g, '%21');
-
-      if (state.tag[0] === '!') {
-        tagStr = '!' + tagStr;
-      } else if (tagStr.slice(0, 18) === 'tag:yaml.org,2002:') {
-        tagStr = '!!' + tagStr.slice(18);
-      } else {
-        tagStr = '!<' + tagStr + '>';
-      }
-
-      state.dump = tagStr + ' ' + state.dump;
-    }
-  }
-
-  return true;
-}
-
-function getDuplicateReferences(object, state) {
-  var objects = [],
-      duplicatesIndexes = [],
-      index,
-      length;
-
-  inspectNode(object, objects, duplicatesIndexes);
-
-  for (index = 0, length = duplicatesIndexes.length; index < length; index += 1) {
-    state.duplicates.push(objects[duplicatesIndexes[index]]);
-  }
-  state.usedDuplicates = new Array(length);
-}
-
-function inspectNode(object, objects, duplicatesIndexes) {
-  var objectKeyList,
-      index,
-      length;
-
-  if (object !== null && typeof object === 'object') {
-    index = objects.indexOf(object);
-    if (index !== -1) {
-      if (duplicatesIndexes.indexOf(index) === -1) {
-        duplicatesIndexes.push(index);
-      }
-    } else {
-      objects.push(object);
-
-      if (Array.isArray(object)) {
-        for (index = 0, length = object.length; index < length; index += 1) {
-          inspectNode(object[index], objects, duplicatesIndexes);
-        }
-      } else {
-        objectKeyList = Object.keys(object);
-
-        for (index = 0, length = objectKeyList.length; index < length; index += 1) {
-          inspectNode(object[objectKeyList[index]], objects, duplicatesIndexes);
-        }
-      }
-    }
-  }
-}
-
-function dump(input, options) {
-  options = options || {};
-
-  var state = new State(options);
-
-  if (!state.noRefs) getDuplicateReferences(input, state);
-
-  var value = input;
-
-  if (state.replacer) {
-    value = state.replacer.call({ '': value }, '', value);
-  }
-
-  if (writeNode(state, 0, value, true, true)) return state.dump + '\n';
-
-  return '';
-}
-
-module.exports.dump = dump;