build: Add some required modules for node

2 files changed, 882 insertions, 0 deletions

diff --git a/node_modules/argparse/lib/help/added_formatters.js b/node_modules/argparse/lib/help/added_formatters.js
new file mode 100644
index 0000000..f8e4299
--- /dev/null
+++ b/node_modules/argparse/lib/help/added_formatters.js
@@ -0,0 +1,87 @@
+'use strict';
+
+var util    = require('util');
+
+// Constants
+var c = require('../const');
+
+var $$ = require('../utils');
+var HelpFormatter = require('./formatter.js');
+
+/**
+ * new RawDescriptionHelpFormatter(options)
+ * new ArgumentParser({formatterClass: argparse.RawDescriptionHelpFormatter, ...})
+ *
+ * Help message formatter which adds default values to argument help.
+ *
+ * Only the name of this class is considered a public API. All the methods
+ * provided by the class are considered an implementation detail.
+ **/
+
+function ArgumentDefaultsHelpFormatter(options) {
+  HelpFormatter.call(this, options);
+}
+
+util.inherits(ArgumentDefaultsHelpFormatter, HelpFormatter);
+
+ArgumentDefaultsHelpFormatter.prototype._getHelpString = function (action) {
+  var help = action.help;
+  if (action.help.indexOf('%(defaultValue)s') === -1) {
+    if (action.defaultValue !== c.SUPPRESS) {
+      var defaulting_nargs = [ c.OPTIONAL, c.ZERO_OR_MORE ];
+      if (action.isOptional() || (defaulting_nargs.indexOf(action.nargs) >= 0)) {
+        help += ' (default: %(defaultValue)s)';
+      }
+    }
+  }
+  return help;
+};
+
+module.exports.ArgumentDefaultsHelpFormatter = ArgumentDefaultsHelpFormatter;
+
+/**
+ * new RawDescriptionHelpFormatter(options)
+ * new ArgumentParser({formatterClass: argparse.RawDescriptionHelpFormatter, ...})
+ *
+ * Help message formatter which retains any formatting in descriptions.
+ *
+ * Only the name of this class is considered a public API. All the methods
+ * provided by the class are considered an implementation detail.
+ **/
+
+function RawDescriptionHelpFormatter(options) {
+  HelpFormatter.call(this, options);
+}
+
+util.inherits(RawDescriptionHelpFormatter, HelpFormatter);
+
+RawDescriptionHelpFormatter.prototype._fillText = function (text, width, indent) {
+  var lines = text.split('\n');
+  lines = lines.map(function (line) {
+    return $$.trimEnd(indent + line);
+  });
+  return lines.join('\n');
+};
+module.exports.RawDescriptionHelpFormatter = RawDescriptionHelpFormatter;
+
+/**
+ * new RawTextHelpFormatter(options)
+ * new ArgumentParser({formatterClass: argparse.RawTextHelpFormatter, ...})
+ *
+ * Help message formatter which retains formatting of all help text.
+ *
+ * Only the name of this class is considered a public API. All the methods
+ * provided by the class are considered an implementation detail.
+ **/
+
+function RawTextHelpFormatter(options) {
+  RawDescriptionHelpFormatter.call(this, options);
+}
+
+util.inherits(RawTextHelpFormatter, RawDescriptionHelpFormatter);
+
+RawTextHelpFormatter.prototype._splitLines = function (text) {
+  return text.split('\n');
+};
+
+module.exports.RawTextHelpFormatter = RawTextHelpFormatter;
diff --git a/node_modules/argparse/lib/help/formatter.js b/node_modules/argparse/lib/help/formatter.js
new file mode 100644
index 0000000..29036c1
--- /dev/null
+++ b/node_modules/argparse/lib/help/formatter.js
@@ -0,0 +1,795 @@
+/**
+ * class HelpFormatter
+ *
+ * Formatter for generating usage messages and argument help strings. Only the
+ * name of this class is considered a public API. All the methods provided by
+ * the class are considered an implementation detail.
+ *
+ * Do not call in your code, use this class only for inherits your own forvatter
+ *
+ * ToDo add [additonal formatters][1]
+ *
+ * [1]:http://docs.python.org/dev/library/argparse.html#formatter-class
+ **/
+'use strict';
+
+var sprintf = require('sprintf-js').sprintf;
+
+// Constants
+var c = require('../const');
+
+var $$ = require('../utils');
+
+
+/*:nodoc:* internal
+ * new Support(parent, heding)
+ * - parent (object): parent section
+ * - heading (string): header string
+ *
+ **/
+function Section(parent, heading) {
+  this._parent = parent;
+  this._heading = heading;
+  this._items = [];
+}
+
+/*:nodoc:* internal
+ * Section#addItem(callback) -> Void
+ * - callback (array): tuple with function and args
+ *
+ * Add function for single element
+ **/
+Section.prototype.addItem = function (callback) {
+  this._items.push(callback);
+};
+
+/*:nodoc:* internal
+ * Section#formatHelp(formatter) -> string
+ * - formatter (HelpFormatter): current formatter
+ *
+ * Form help section string
+ *
+ **/
+Section.prototype.formatHelp = function (formatter) {
+  var itemHelp, heading;
+
+  // format the indented section
+  if (this._parent) {
+    formatter._indent();
+  }
+
+  itemHelp = this._items.map(function (item) {
+    var obj, func, args;
+
+    obj = formatter;
+    func = item[0];
+    args = item[1];
+    return func.apply(obj, args);
+  });
+  itemHelp = formatter._joinParts(itemHelp);
+
+  if (this._parent) {
+    formatter._dedent();
+  }
+
+  // return nothing if the section was empty
+  if (!itemHelp) {
+    return '';
+  }
+
+  // add the heading if the section was non-empty
+  heading = '';
+  if (this._heading && this._heading !== c.SUPPRESS) {
+    var currentIndent = formatter.currentIndent;
+    heading = $$.repeat(' ', currentIndent) + this._heading + ':' + c.EOL;
+  }
+
+  // join the section-initialize newline, the heading and the help
+  return formatter._joinParts([ c.EOL, heading, itemHelp, c.EOL ]);
+};
+
+/**
+ * new HelpFormatter(options)
+ *
+ * #### Options:
+ * - `prog`: program name
+ * - `indentIncriment`: indent step, default value 2
+ * - `maxHelpPosition`: max help position, default value = 24
+ * - `width`: line width
+ *
+ **/
+var HelpFormatter = module.exports = function HelpFormatter(options) {
+  options = options || {};
+
+  this._prog = options.prog;
+
+  this._maxHelpPosition = options.maxHelpPosition || 24;
+  this._width = (options.width || ((process.env.COLUMNS || 80) - 2));
+
+  this._currentIndent = 0;
+  this._indentIncriment = options.indentIncriment || 2;
+  this._level = 0;
+  this._actionMaxLength = 0;
+
+  this._rootSection = new Section(null);
+  this._currentSection = this._rootSection;
+
+  this._whitespaceMatcher = new RegExp('\\s+', 'g');
+  this._longBreakMatcher = new RegExp(c.EOL + c.EOL + c.EOL + '+', 'g');
+};
+
+HelpFormatter.prototype._indent = function () {
+  this._currentIndent += this._indentIncriment;
+  this._level += 1;
+};
+
+HelpFormatter.prototype._dedent = function () {
+  this._currentIndent -= this._indentIncriment;
+  this._level -= 1;
+  if (this._currentIndent < 0) {
+    throw new Error('Indent decreased below 0.');
+  }
+};
+
+HelpFormatter.prototype._addItem = function (func, args) {
+  this._currentSection.addItem([ func, args ]);
+};
+
+//
+// Message building methods
+//
+
+/**
+ * HelpFormatter#startSection(heading) -> Void
+ * - heading (string): header string
+ *
+ * Start new help section
+ *
+ * See alse [code example][1]
+ *
+ * ##### Example
+ *
+ *      formatter.startSection(actionGroup.title);
+ *      formatter.addText(actionGroup.description);
+ *      formatter.addArguments(actionGroup._groupActions);
+ *      formatter.endSection();
+ *
+ **/
+HelpFormatter.prototype.startSection = function (heading) {
+  this._indent();
+  var section = new Section(this._currentSection, heading);
+  var func = section.formatHelp.bind(section);
+  this._addItem(func, [ this ]);
+  this._currentSection = section;
+};
+
+/**
+ * HelpFormatter#endSection -> Void
+ *
+ * End help section
+ *
+ * ##### Example
+ *
+ *      formatter.startSection(actionGroup.title);
+ *      formatter.addText(actionGroup.description);
+ *      formatter.addArguments(actionGroup._groupActions);
+ *      formatter.endSection();
+ **/
+HelpFormatter.prototype.endSection = function () {
+  this._currentSection = this._currentSection._parent;
+  this._dedent();
+};
+
+/**
+ * HelpFormatter#addText(text) -> Void
+ * - text (string): plain text
+ *
+ * Add plain text into current section
+ *
+ * ##### Example
+ *
+ *      formatter.startSection(actionGroup.title);
+ *      formatter.addText(actionGroup.description);
+ *      formatter.addArguments(actionGroup._groupActions);
+ *      formatter.endSection();
+ *
+ **/
+HelpFormatter.prototype.addText = function (text) {
+  if (text && text !== c.SUPPRESS) {
+    this._addItem(this._formatText, [ text ]);
+  }
+};
+
+/**
+ * HelpFormatter#addUsage(usage, actions, groups, prefix) -> Void
+ * - usage (string): usage text
+ * - actions (array): actions list
+ * - groups (array): groups list
+ * - prefix (string): usage prefix
+ *
+ * Add usage data into current section
+ *
+ * ##### Example
+ *
+ *      formatter.addUsage(this.usage, this._actions, []);
+ *      return formatter.formatHelp();
+ *
+ **/
+HelpFormatter.prototype.addUsage = function (usage, actions, groups, prefix) {
+  if (usage !== c.SUPPRESS) {
+    this._addItem(this._formatUsage, [ usage, actions, groups, prefix ]);
+  }
+};
+
+/**
+ * HelpFormatter#addArgument(action) -> Void
+ * - action (object): action
+ *
+ * Add argument into current section
+ *
+ * Single variant of [[HelpFormatter#addArguments]]
+ **/
+HelpFormatter.prototype.addArgument = function (action) {
+  if (action.help !== c.SUPPRESS) {
+    var self = this;
+
+    // find all invocations
+    var invocations = [ this._formatActionInvocation(action) ];
+    var invocationLength = invocations[0].length;
+
+    var actionLength;
+
+    if (action._getSubactions) {
+      this._indent();
+      action._getSubactions().forEach(function (subaction) {
+
+        var invocationNew = self._formatActionInvocation(subaction);
+        invocations.push(invocationNew);
+        invocationLength = Math.max(invocationLength, invocationNew.length);
+
+      });
+      this._dedent();
+    }
+
+    // update the maximum item length
+    actionLength = invocationLength + this._currentIndent;
+    this._actionMaxLength = Math.max(this._actionMaxLength, actionLength);
+
+    // add the item to the list
+    this._addItem(this._formatAction, [ action ]);
+  }
+};
+
+/**
+ * HelpFormatter#addArguments(actions) -> Void
+ * - actions (array): actions list
+ *
+ * Mass add arguments into current section
+ *
+ * ##### Example
+ *
+ *      formatter.startSection(actionGroup.title);
+ *      formatter.addText(actionGroup.description);
+ *      formatter.addArguments(actionGroup._groupActions);
+ *      formatter.endSection();
+ *
+ **/
+HelpFormatter.prototype.addArguments = function (actions) {
+  var self = this;
+  actions.forEach(function (action) {
+    self.addArgument(action);
+  });
+};
+
+//
+// Help-formatting methods
+//
+
+/**
+ * HelpFormatter#formatHelp -> string
+ *
+ * Format help
+ *
+ * ##### Example
+ *
+ *      formatter.addText(this.epilog);
+ *      return formatter.formatHelp();
+ *
+ **/
+HelpFormatter.prototype.formatHelp = function () {
+  var help = this._rootSection.formatHelp(this);
+  if (help) {
+    help = help.replace(this._longBreakMatcher, c.EOL + c.EOL);
+    help = $$.trimChars(help, c.EOL) + c.EOL;
+  }
+  return help;
+};
+
+HelpFormatter.prototype._joinParts = function (partStrings) {
+  return partStrings.filter(function (part) {
+    return (part && part !== c.SUPPRESS);
+  }).join('');
+};
+
+HelpFormatter.prototype._formatUsage = function (usage, actions, groups, prefix) {
+  if (!prefix && typeof prefix !== 'string') {
+    prefix = 'usage: ';
+  }
+
+  actions = actions || [];
+  groups = groups || [];
+
+
+  // if usage is specified, use that
+  if (usage) {
+    usage = sprintf(usage, { prog: this._prog });
+
+    // if no optionals or positionals are available, usage is just prog
+  } else if (!usage && actions.length === 0) {
+    usage = this._prog;
+
+    // if optionals and positionals are available, calculate usage
+  } else if (!usage) {
+    var prog = this._prog;
+    var optionals = [];
+    var positionals = [];
+    var actionUsage;
+    var textWidth;
+
+    // split optionals from positionals
+    actions.forEach(function (action) {
+      if (action.isOptional()) {
+        optionals.push(action);
+      } else {
+        positionals.push(action);
+      }
+    });
+
+    // build full usage string
+    actionUsage = this._formatActionsUsage([].concat(optionals, positionals), groups);
+    usage = [ prog, actionUsage ].join(' ');
+
+    // wrap the usage parts if it's too long
+    textWidth = this._width - this._currentIndent;
+    if ((prefix.length + usage.length) > textWidth) {
+
+      // break usage into wrappable parts
+      var regexpPart = new RegExp('\\(.*?\\)+|\\[.*?\\]+|\\S+', 'g');
+      var optionalUsage = this._formatActionsUsage(optionals, groups);
+      var positionalUsage = this._formatActionsUsage(positionals, groups);
+
+
+      var optionalParts = optionalUsage.match(regexpPart);
+      var positionalParts = positionalUsage.match(regexpPart) || [];
+
+      if (optionalParts.join(' ') !== optionalUsage) {
+        throw new Error('assert "optionalParts.join(\' \') === optionalUsage"');
+      }
+      if (positionalParts.join(' ') !== positionalUsage) {
+        throw new Error('assert "positionalParts.join(\' \') === positionalUsage"');
+      }
+
+      // helper for wrapping lines
+      /*eslint-disable func-style*/ // node 0.10 compat
+      var _getLines = function (parts, indent, prefix) {
+        var lines = [];
+        var line = [];
+
+        var lineLength = prefix ? prefix.length - 1 : indent.length - 1;
+
+        parts.forEach(function (part) {
+          if (lineLength + 1 + part.length > textWidth) {
+            lines.push(indent + line.join(' '));
+            line = [];
+            lineLength = indent.length - 1;
+          }
+          line.push(part);
+          lineLength += part.length + 1;
+        });
+
+        if (line) {
+          lines.push(indent + line.join(' '));
+        }
+        if (prefix) {
+          lines[0] = lines[0].substr(indent.length);
+        }
+        return lines;
+      };
+
+      var lines, indent, parts;
+      // if prog is short, follow it with optionals or positionals
+      if (prefix.length + prog.length <= 0.75 * textWidth) {
+        indent = $$.repeat(' ', (prefix.length + prog.length + 1));
+        if (optionalParts) {
+          lines = [].concat(
+            _getLines([ prog ].concat(optionalParts), indent, prefix),
+            _getLines(positionalParts, indent)
+          );
+        } else if (positionalParts) {
+          lines = _getLines([ prog ].concat(positionalParts), indent, prefix);
+        } else {
+          lines = [ prog ];
+        }
+
+        // if prog is long, put it on its own line
+      } else {
+        indent = $$.repeat(' ', prefix.length);
+        parts = optionalParts.concat(positionalParts);
+        lines = _getLines(parts, indent);
+        if (lines.length > 1) {
+          lines = [].concat(
+            _getLines(optionalParts, indent),
+            _getLines(positionalParts, indent)
+          );
+        }
+        lines = [ prog ].concat(lines);
+      }
+      // join lines into usage
+      usage = lines.join(c.EOL);
+    }
+  }
+
+  // prefix with 'usage:'
+  return prefix + usage + c.EOL + c.EOL;
+};
+
+HelpFormatter.prototype._formatActionsUsage = function (actions, groups) {
+  // find group indices and identify actions in groups
+  var groupActions = [];
+  var inserts = [];
+  var self = this;
+
+  groups.forEach(function (group) {
+    var end;
+    var i;
+
+    var start = actions.indexOf(group._groupActions[0]);
+    if (start >= 0) {
+      end = start + group._groupActions.length;
+
+      //if (actions.slice(start, end) === group._groupActions) {
+      if ($$.arrayEqual(actions.slice(start, end), group._groupActions)) {
+        group._groupActions.forEach(function (action) {
+          groupActions.push(action);
+        });
+
+        if (!group.required) {
+          if (inserts[start]) {
+            inserts[start] += ' [';
+          } else {
+            inserts[start] = '[';
+          }
+          inserts[end] = ']';
+        } else {
+          if (inserts[start]) {
+            inserts[start] += ' (';
+          } else {
+            inserts[start] = '(';
+          }
+          inserts[end] = ')';
+        }
+        for (i = start + 1; i < end; i += 1) {
+          inserts[i] = '|';
+        }
+      }
+    }
+  });
+
+  // collect all actions format strings
+  var parts = [];
+
+  actions.forEach(function (action, actionIndex) {
+    var part;
+    var optionString;
+    var argsDefault;
+    var argsString;
+
+    // suppressed arguments are marked with None
+    // remove | separators for suppressed arguments
+    if (action.help === c.SUPPRESS) {
+      parts.push(null);
+      if (inserts[actionIndex] === '|') {
+        inserts.splice(actionIndex, actionIndex);
+      } else if (inserts[actionIndex + 1] === '|') {
+        inserts.splice(actionIndex + 1, actionIndex + 1);
+      }
+
+      // produce all arg strings
+    } else if (!action.isOptional()) {
+      part = self._formatArgs(action, action.dest);
+
+      // if it's in a group, strip the outer []
+      if (groupActions.indexOf(action) >= 0) {
+        if (part[0] === '[' && part[part.length - 1] === ']') {
+          part = part.slice(1, -1);
+        }
+      }
+      // add the action string to the list
+      parts.push(part);
+
+    // produce the first way to invoke the option in brackets
+    } else {
+      optionString = action.optionStrings[0];
+
+      // if the Optional doesn't take a value, format is: -s or --long
+      if (action.nargs === 0) {
+        part = '' + optionString;
+
+      // if the Optional takes a value, format is: -s ARGS or --long ARGS
+      } else {
+        argsDefault = action.dest.toUpperCase();
+        argsString = self._formatArgs(action, argsDefault);
+        part = optionString + ' ' + argsString;
+      }
+      // make it look optional if it's not required or in a group
+      if (!action.required && groupActions.indexOf(action) < 0) {
+        part = '[' + part + ']';
+      }
+      // add the action string to the list
+      parts.push(part);
+    }
+  });
+
+  // insert things at the necessary indices
+  for (var i = inserts.length - 1; i >= 0; --i) {
+    if (inserts[i] !== null) {
+      parts.splice(i, 0, inserts[i]);
+    }
+  }
+
+  // join all the action items with spaces
+  var text = parts.filter(function (part) {
+    return !!part;
+  }).join(' ');
+
+  // clean up separators for mutually exclusive groups
+  text = text.replace(/([\[(]) /g, '$1'); // remove spaces
+  text = text.replace(/ ([\])])/g, '$1');
+  text = text.replace(/\[ *\]/g, ''); // remove empty groups
+  text = text.replace(/\( *\)/g, '');
+  text = text.replace(/\(([^|]*)\)/g, '$1'); // remove () from single action groups
+
+  text = text.trim();
+
+  // return the text
+  return text;
+};
+
+HelpFormatter.prototype._formatText = function (text) {
+  text = sprintf(text, { prog: this._prog });
+  var textWidth = this._width - this._currentIndent;
+  var indentIncriment = $$.repeat(' ', this._currentIndent);
+  return this._fillText(text, textWidth, indentIncriment) + c.EOL + c.EOL;
+};
+
+HelpFormatter.prototype._formatAction = function (action) {
+  var self = this;
+
+  var helpText;
+  var helpLines;
+  var parts;
+  var indentFirst;
+
+  // determine the required width and the entry label
+  var helpPosition = Math.min(this._actionMaxLength + 2, this._maxHelpPosition);
+  var helpWidth = this._width - helpPosition;
+  var actionWidth = helpPosition - this._currentIndent - 2;
+  var actionHeader = this._formatActionInvocation(action);
+
+  // no help; start on same line and add a final newline
+  if (!action.help) {
+    actionHeader = $$.repeat(' ', this._currentIndent) + actionHeader + c.EOL;
+
+  // short action name; start on the same line and pad two spaces
+  } else if (actionHeader.length <= actionWidth) {
+    actionHeader = $$.repeat(' ', this._currentIndent) +
+        actionHeader +
+        '  ' +
+        $$.repeat(' ', actionWidth - actionHeader.length);
+    indentFirst = 0;
+
+  // long action name; start on the next line
+  } else {
+    actionHeader = $$.repeat(' ', this._currentIndent) + actionHeader + c.EOL;
+    indentFirst = helpPosition;
+  }
+
+  // collect the pieces of the action help
+  parts = [ actionHeader ];
+
+  // if there was help for the action, add lines of help text
+  if (action.help) {
+    helpText = this._expandHelp(action);
+    helpLines = this._splitLines(helpText, helpWidth);
+    parts.push($$.repeat(' ', indentFirst) + helpLines[0] + c.EOL);
+    helpLines.slice(1).forEach(function (line) {
+      parts.push($$.repeat(' ', helpPosition) + line + c.EOL);
+    });
+
+  // or add a newline if the description doesn't end with one
+  } else if (actionHeader.charAt(actionHeader.length - 1) !== c.EOL) {
+    parts.push(c.EOL);
+  }
+  // if there are any sub-actions, add their help as well
+  if (action._getSubactions) {
+    this._indent();
+    action._getSubactions().forEach(function (subaction) {
+      parts.push(self._formatAction(subaction));
+    });
+    this._dedent();
+  }
+  // return a single string
+  return this._joinParts(parts);
+};
+
+HelpFormatter.prototype._formatActionInvocation = function (action) {
+  if (!action.isOptional()) {
+    var format_func = this._metavarFormatter(action, action.dest);
+    var metavars = format_func(1);
+    return metavars[0];
+  }
+
+  var parts = [];
+  var argsDefault;
+  var argsString;
+
+  // if the Optional doesn't take a value, format is: -s, --long
+  if (action.nargs === 0) {
+    parts = parts.concat(action.optionStrings);
+
+  // if the Optional takes a value, format is: -s ARGS, --long ARGS
+  } else {
+    argsDefault = action.dest.toUpperCase();
+    argsString = this._formatArgs(action, argsDefault);
+    action.optionStrings.forEach(function (optionString) {
+      parts.push(optionString + ' ' + argsString);
+    });
+  }
+  return parts.join(', ');
+};
+
+HelpFormatter.prototype._metavarFormatter = function (action, metavarDefault) {
+  var result;
+
+  if (action.metavar || action.metavar === '') {
+    result = action.metavar;
+  } else if (action.choices) {
+    var choices = action.choices;
+
+    if (typeof choices === 'string') {
+      choices = choices.split('').join(', ');
+    } else if (Array.isArray(choices)) {
+      choices = choices.join(',');
+    } else {
+      choices = Object.keys(choices).join(',');
+    }
+    result = '{' + choices + '}';
+  } else {
+    result = metavarDefault;
+  }
+
+  return function (size) {
+    if (Array.isArray(result)) {
+      return result;
+    }
+
+    var metavars = [];
+    for (var i = 0; i < size; i += 1) {
+      metavars.push(result);
+    }
+    return metavars;
+  };
+};
+
+HelpFormatter.prototype._formatArgs = function (action, metavarDefault) {
+  var result;
+  var metavars;
+
+  var buildMetavar = this._metavarFormatter(action, metavarDefault);
+
+  switch (action.nargs) {
+    /*eslint-disable no-undefined*/
+    case undefined:
+    case null:
+      metavars = buildMetavar(1);
+      result = '' + metavars[0];
+      break;
+    case c.OPTIONAL:
+      metavars = buildMetavar(1);
+      result = '[' + metavars[0] + ']';
+      break;
+    case c.ZERO_OR_MORE:
+      metavars = buildMetavar(2);
+      result = '[' + metavars[0] + ' [' + metavars[1] + ' ...]]';
+      break;
+    case c.ONE_OR_MORE:
+      metavars = buildMetavar(2);
+      result = '' + metavars[0] + ' [' + metavars[1] + ' ...]';
+      break;
+    case c.REMAINDER:
+      result = '...';
+      break;
+    case c.PARSER:
+      metavars = buildMetavar(1);
+      result = metavars[0] + ' ...';
+      break;
+    default:
+      metavars = buildMetavar(action.nargs);
+      result = metavars.join(' ');
+  }
+  return result;
+};
+
+HelpFormatter.prototype._expandHelp = function (action) {
+  var params = { prog: this._prog };
+
+  Object.keys(action).forEach(function (actionProperty) {
+    var actionValue = action[actionProperty];
+
+    if (actionValue !== c.SUPPRESS) {
+      params[actionProperty] = actionValue;
+    }
+  });
+
+  if (params.choices) {
+    if (typeof params.choices === 'string') {
+      params.choices = params.choices.split('').join(', ');
+    } else if (Array.isArray(params.choices)) {
+      params.choices = params.choices.join(', ');
+    } else {
+      params.choices = Object.keys(params.choices).join(', ');
+    }
+  }
+
+  return sprintf(this._getHelpString(action), params);
+};
+
+HelpFormatter.prototype._splitLines = function (text, width) {
+  var lines = [];
+  var delimiters = [ ' ', '.', ',', '!', '?' ];
+  var re = new RegExp('[' + delimiters.join('') + '][^' + delimiters.join('') + ']*$');
+
+  text = text.replace(/[\n\|\t]/g, ' ');
+
+  text = text.trim();
+  text = text.replace(this._whitespaceMatcher, ' ');
+
+  // Wraps the single paragraph in text (a string) so every line
+  // is at most width characters long.
+  text.split(c.EOL).forEach(function (line) {
+    if (width >= line.length) {
+      lines.push(line);
+      return;
+    }
+
+    var wrapStart = 0;
+    var wrapEnd = width;
+    var delimiterIndex = 0;
+    while (wrapEnd <= line.length) {
+      if (wrapEnd !== line.length && delimiters.indexOf(line[wrapEnd] < -1)) {
+        delimiterIndex = (re.exec(line.substring(wrapStart, wrapEnd)) || {}).index;
+        wrapEnd = wrapStart + delimiterIndex + 1;
+      }
+      lines.push(line.substring(wrapStart, wrapEnd));
+      wrapStart = wrapEnd;
+      wrapEnd += width;
+    }
+    if (wrapStart < line.length) {
+      lines.push(line.substring(wrapStart, wrapEnd));
+    }
+  });
+
+  return lines;
+};
+
+HelpFormatter.prototype._fillText = function (text, width, indent) {
+  var lines = this._splitLines(text, width);
+  lines = lines.map(function (line) {
+    return indent + line;
+  });
+  return lines.join(c.EOL);
+};
+
+HelpFormatter.prototype._getHelpString = function (action) {
+  return action.help;
+};