edit-config support for iOS plist

<edit-config file="*-Info.plist" mode="overwrite" target="UISupportedInterfaceOrientations">
<array>
<string>UIInterfaceOrientationPortrait</string>
<string>UIInterfaceOrientationPortraitUpsideDown</string>
</array>
</edit-config>
<edit-config file="*-Info.plist" mode="overwrite" target="UISupportedInterfaceOrientations~ipad">
<array>
<string>UIInterfaceOrientationLandscapeLeft</string>
<string>UIInterfaceOrientationLandscapeRight</string>
</array>
</edit-config>

// File ConfigFile.js

ConfigFile.prototype.graft_child = function ConfigFile_graft_child (selector, xml_child) {
var self = this;
var filepath = self.filepath;
var result;
if (self.type === 'xml') {
var xml_to_graft = [modules.et.XML(xml_child.xml)];
switch (xml_child.mode) {
case 'merge':
result = modules.xml_helpers.graftXMLMerge(self.data, xml_to_graft, selector, xml_child);
break;
case 'overwrite':
result = modules.xml_helpers.graftXMLOverwrite(self.data, xml_to_graft, selector, xml_child);
break;
case 'remove':
result = modules.xml_helpers.pruneXMLRemove(self.data, selector, xml_to_graft);
break;
default:
result = modules.xml_helpers.graftXML(self.data, xml_to_graft, selector, xml_child.after);
}
if (!result) {
throw new Error('Unable to graft xml at selector "' + selector + '" from "' + filepath + '" during config install');
}
} else {
// plist file. Passed mode from here
result = modules.plist_helpers.graftPLIST(self.data, xml_child.xml, selector, xml_child.mode);
if (!result) {
throw new Error('Unable to graft plist "' + filepath + '" during config install');
}
}
self.is_changed = true;
};

// File: xml-helper.js

resolveParent: function (doc, selector) {
var parent, tagName, subSelector;
// handle absolute selector (which elementtree doesn't like)
if (ROOT.test(selector)) {
tagName = selector.match(ROOT)[1];

// test for wildcard "any-tag" root selector
if (tagName === '*' || tagName === doc._root.tag) {
parent = doc._root;

// could be an absolute path, but not selecting the root
if (ABSOLUTE.test(selector)) {
subSelector = selector.match(ABSOLUTE)[2];
parent = parent.find(subSelector);
}
} else {
return false;
}
} else {
// here is the issue for exception "doc.finf is not a function"
parent = Array.isArray(doc) ? doc.find(selector) : doc[selector];
}
return parent;
}

// File: plist-helper.js

function graftPLIST (doc, xml, selector, mode) {
var obj = plist.parse('<plist>' + xml + '</plist>');

var node = doc[selector];
if (node && Array.isArray(node) && Array.isArray(obj)) {
// node = node.concat(obj);
// addressed overwrite mode here
(mode == 'overwrite') ? (node = obj) : (node = node.concat(obj));
for (var i = 0; i < node.length; i++) {
for (var j = i + 1; j < node.length; ++j) {
if (nodeEqual(node[i], node[j])) { node.splice(j--, 1); }
}
}
doc[selector] = node;
} else {
// plist uses objects for <dict>. If we have two dicts we merge them instead of
// overriding the old one. See CB-6472
if (node && __.isObject(node) && __.isObject(obj) && !__.isDate(node) && !__.isDate(obj)) { // arrays checked above
__.extend(obj, node);
}
doc[selector] = obj;
}

return true;
}