static BuildResult GetIdentity (IProgressMonitor monitor, IPhoneProject proj, IPhoneProjectConfiguration conf,
		                                out IPhoneAppIdentity identity)
		{
			var result = new BuildResult ();
			identity = new IPhoneAppIdentity ();
			bool defaultID = string.IsNullOrEmpty (proj.BundleIdentifier);
			
			if (!defaultID)
				identity.BundleID = proj.BundleIdentifier;
			
			//treat empty as "developer automatic"
			if (string.IsNullOrEmpty (conf.CodesignKey)) {
				conf.CodesignKey = IPhoneProject.DEV_CERT_PREFIX;
			}
			
			IList<X509Certificate2> certs = null;
			if (conf.CodesignKey == IPhoneProject.DEV_CERT_PREFIX || conf.CodesignKey == IPhoneProject.DIST_CERT_PREFIX) {
				certs = Keychain.FindNamedSigningCertificates (x => x.StartsWith (conf.CodesignKey)).ToList ();
				if (certs.Count == 0) {
					result.AddError ("No valid iPhone code signing keys found in keychain.");
					return result;
				}
			} else {
				identity.SigningKey = Keychain.FindNamedSigningCertificates (x => x == conf.CodesignKey).FirstOrDefault ();
				if (identity.SigningKey == null) {
					result.AddError (string.Format ("iPhone code signing key '{0}' not found in keychain.", conf.CodesignKey));
					return result;
				}
				certs = new X509Certificate2[] { identity.SigningKey };
			}
			
			if (!string.IsNullOrEmpty (conf.CodesignProvision)) {
				//if the profile was installed by Xcode, we can determine the filename directly from the UUID
				//but if it was installed by iTunes, we need to search all profiles for the UUID.
				var file = MobileProvision.ProfileDirectory.Combine (conf.CodesignProvision).ChangeExtension (".mobileprovision");
				if (File.Exists (file)) {
					try {
						identity.Profile = MobileProvision.LoadFromFile (file);
					} catch (Exception ex) {
						string msg = "Could not read provisioning profile '" + file + "'.";
						monitor.ReportError (msg, ex);
						result.AddError (msg);
						return result;
					}
				} else {
					identity.Profile = MobileProvision.GetAllInstalledProvisions ()
						.Where (p => p.Uuid == conf.CodesignProvision).FirstOrDefault ();
				}
				
				if (identity.Profile == null) {
					result.AddError (string.Format ("The specified provisioning profile '{0}' could not be found", conf.CodesignProvision));
					return result;
				}
				
				var prof = identity.Profile; //capture ref for lambda
				identity.SigningKey = certs.Where (c => prof.DeveloperCertificates
				                           .Any (p => p.Thumbprint == c.Thumbprint)).FirstOrDefault ();
				if (identity.SigningKey == null) {
					result.AddError (string.Format ("No iPhone code signing key matches specified provisioning profile '{0}'.", conf.CodesignProvision));
					return result;
				}
				
				if (defaultID) {
					identity.BundleID = GetDefaultBundleID (proj, GetProfileBundleID (identity.Profile));
					result.AddWarning (string.Format ("Project does not have bundle identifier specified. Generated '{0}' to match provisioning profile.", identity.BundleID));
				}
				
				bool exact;
				identity.AppID = ConstructValidAppId (identity.Profile, identity.BundleID, out exact);
				if (identity.AppID == null) {
					result.AddError (string.Format (
						"Project bundle ID '{0}' does not match specified provisioning profile '{1}'", identity.BundleID, conf.CodesignProvision));
					return result;
				}
				return result;
			}
			
			var pairs = (from p in MobileProvision.GetAllInstalledProvisions ()
				from c in certs
				where p.DeveloperCertificates.Any (d => d.Thumbprint == c.Thumbprint)
				select new { Cert = c, Profile = p }).ToList ();
				
			if (pairs.Count == 0) {
				result.AddError ("No installed provisioning profiles match the installed iPhone code signing keys.");
				return result;
			}
			
			if (!defaultID) {
				//find a provisioning profile with compatible appid, preferring exact match
				foreach (var p in pairs) {
					bool exact;
					var id = ConstructValidAppId (p.Profile, identity.BundleID, out exact);
					if (id != null) {
						if (exact || identity.AppID == null) {
							identity.Profile = p.Profile;
							identity.SigningKey = p.Cert;
							identity.AppID = id;
						}
						if (exact)
							break;
					}
				}
			} else {
				//pick provisioning profile to provide appid and better default bundle ID, preferring star bundle IDs
				foreach (var p in pairs) {
					var suggestion = GetProfileBundleID (p.Profile);
					bool star = (suggestion != null) && suggestion.EndsWith ("*");
					if (star || identity.Profile == null) {
						identity.Profile = p.Profile;
						identity.SigningKey = p.Cert;
						identity.BundleID = GetDefaultBundleID (proj, suggestion);
						bool exact;
						identity.AppID = ConstructValidAppId (p.Profile, identity.BundleID, out exact);
					}
					if (star)
						break;
				}
				result.AddWarning (string.Format ("Project does not have bundle identifier specified. Generated '{0}' to match an installed provisioning profile.", identity.BundleID));
			}
			
			if (identity.Profile != null && identity.SigningKey != null && identity.AppID != null)
				return result;
			
			if (identity.SigningKey != null) {
				result.AddError (string.Format (
					"Bundle identifier '{0}' does not match any installed provisioning profile for selected signing identity '{0}'.",
					identity.BundleID, identity.SigningKey));
			} else {
				result.AddError (string.Format (
					"Bundle identifier '{0}' does not match any installed provisioning profile.",
					identity.BundleID));
			}
			return result;
		}
		protected override BuildResult Build (IProgressMonitor monitor, SolutionEntityItem item, ConfigurationSelector configuration)
		{
			IPhoneProject proj = item as IPhoneProject;
			if (proj == null || proj.CompileTarget != CompileTarget.Exe)
				return base.Build (monitor, item, configuration);
			
			IPhoneFramework.CheckInfoCaches ();
			
			//prebuild
			var conf = (IPhoneProjectConfiguration) proj.GetConfiguration (configuration);
			bool isDevice = conf.Platform == IPhoneProject.PLAT_IPHONE;
			
			if (IPhoneFramework.SimOnly && isDevice) {
				//if in the GUI, show a dialog too
				if (MonoDevelop.Ide.IdeApp.IsInitialized)
					Gtk.Application.Invoke (delegate { IPhoneFramework.ShowSimOnlyDialog (); } );
				return IPhoneFramework.GetSimOnlyError ();
			}
			
			var result = new BuildResult ();
			
			var sdkVersion = conf.MtouchSdkVersion.ResolveIfDefault ();
			
			if (!IPhoneFramework.SdkIsInstalled (sdkVersion)) {
				sdkVersion = IPhoneFramework.GetClosestInstalledSdk (sdkVersion);
				
				if (sdkVersion.IsUseDefault || !IPhoneFramework.SdkIsInstalled (sdkVersion)) {
					if (conf.MtouchSdkVersion.IsUseDefault)
						result.AddError (
							string.Format ("The Apple iPhone SDK is not installed."));
					else
						result.AddError (
							string.Format ("Apple iPhone SDK version '{0}' is not installed, and no newer version was found.",
							conf.MtouchSdkVersion));
					return result;
				}
					
				result.AddWarning (
					string.Format ("Apple iPhone SDK version '{0}' is not installed. Using newer version '{1}' instead'.",
					conf.MtouchSdkVersion, sdkVersion));
			}
			
			IPhoneAppIdentity identity = null;
			if (isDevice) {
				monitor.BeginTask (GettextCatalog.GetString ("Detecting signing identity..."), 0);
				if ((result = GetIdentity (monitor, proj, conf, out identity).Append (result)).ErrorCount > 0)
					return result;
				monitor.Log.WriteLine ("Provisioning profile: \"{0}\" ({1})", identity.Profile.Name, identity.Profile.Uuid);
				monitor.Log.WriteLine ("Signing Identity: \"{0}\"", Keychain.GetCertificateCommonName (identity.SigningKey));
				monitor.Log.WriteLine ("App ID: \"{0}\"", identity.AppID);
				monitor.EndTask ();
			} else {
				identity = new IPhoneAppIdentity () {
					BundleID = !string.IsNullOrEmpty (proj.BundleIdentifier)?
						proj.BundleIdentifier : GetDefaultBundleID (proj, null)
				};
			}
			
			result = base.Build (monitor, item, configuration).Append (result);
			if (result.ErrorCount > 0)
				return result;
			
			if (!Directory.Exists (conf.AppDirectory))
				Directory.CreateDirectory (conf.AppDirectory);
			
			var assemblyRefs = proj.GetReferencedAssemblies (configuration).Distinct ().ToList ();
			
			FilePath mtouchOutput = conf.NativeExe;
			if (new FilePair (conf.CompiledOutputName, mtouchOutput).NeedsBuilding ()) {
				BuildResult error;
				var mtouch = GetMTouch (proj, monitor, out error);
				if (error != null)
					return error.Append (result);
				
				var args = new ProcessArgumentBuilder ();
				//FIXME: make verbosity configurable?
				args.Add ("-v");
				
				args.Add ("--nomanifest", "--nosign");
					
				//FIXME: should we error out if the platform is invalid?
				if (conf.Platform == IPhoneProject.PLAT_IPHONE) {
					args.Add ("-dev");
					args.AddQuoted (conf.AppDirectory);
				} else {
					args.Add ("-sim");
					args.AddQuoted (conf.AppDirectory);
				}
				
				foreach (string asm in assemblyRefs)
					args.AddQuotedFormat ("-r={0}", asm);
				
				IPhoneSdkVersion osVersion = IPhoneSdkVersion.V3_0;
				try {
					osVersion = IPhoneSdkVersion.Parse (conf.MtouchMinimumOSVersion);
				} catch {
					result.AddWarning ("Could not parse minimum OS version '" + conf.MtouchMinimumOSVersion + "'");
				}
				
				if (osVersion < IPhoneSdkVersion.V3_0 && conf.MtouchArch == MtouchArch.ARMv7) {
					result.AddError ("Apps with a minimum OS older than 3.1 cannot be ARMv7 only");
					return result;
				}
				
				AppendExtrasMtouchArgs (args, sdkVersion, proj, conf);
				
				args.AddQuoted (conf.CompiledOutputName);
				
				mtouch.WorkingDirectory = conf.OutputDirectory;
				mtouch.Arguments = args.ToString ();
				
				monitor.BeginTask (GettextCatalog.GetString ("Compiling to native code"), 0);
				
				string output;
				int code;
				monitor.Log.WriteLine ("{0} {1}", mtouch.FileName, mtouch.Arguments);
				if ((code = MacBuildUtilities.ExecuteCommand (monitor, mtouch, out output)) != 0) {
					if (String.IsNullOrEmpty (output)) {
						result.AddError (null, 0, 0, code.ToString (), "mtouch failed with no output");
					} else {
						result.AddError (null, 0, 0, code.ToString (), "mtouch failed with the following message:\n" + output);
					}
					return result;
				}
				
				monitor.EndTask ();
			}
			
			//unpack nibs and content from dll resources (MT 4+ only)
			if (IPhoneFramework.MonoTouchVersion >= new IPhoneSdkVersion (3, 99))
				if (result.Append (UnpackContent (monitor, conf, assemblyRefs)).ErrorCount > 0)
					return result;
			
			//create the info.plist, merging in the template if it exists
			var plistOut = conf.AppDirectory.Combine ("Info.plist");
			ProjectFile appInfoIn = proj.Files.GetFile (proj.BaseDirectory.Combine ("Info.plist"));
			if (new FilePair (proj.FileName, plistOut).NeedsBuilding () ||
			    	(appInfoIn != null && new FilePair (appInfoIn.FilePath, plistOut).NeedsBuilding ())) {
				try {
					monitor.BeginTask (GettextCatalog.GetString ("Updating application manifest"), 0);
					if (result.Append (UpdateInfoPlist (monitor, sdkVersion, proj, conf, identity, appInfoIn, plistOut)).ErrorCount > 0)
						return result;
				} finally {
					monitor.EndTask ();
				}
			}
			
			//create the Setting.bundle plist for debug settings, merging in the template if it exists
			try {
				monitor.BeginTask (GettextCatalog.GetString ("Updating debug settings manifest"), 0);
				var sbRootRel = Path.Combine ("Settings.bundle", "Root.plist");
				var sbRootOut = conf.AppDirectory.Combine (sbRootRel);
				var sbRootIn  = proj.Files.GetFile (proj.BaseDirectory.Combine (sbRootRel));
				if (result.Append (UpdateDebugSettingsPlist (monitor, conf, sbRootIn, sbRootOut)).ErrorCount > 0)
					return result;
			} finally {
				monitor.EndTask ();
			}
			
			try {
				if (result.Append (ProcessPackaging (monitor, sdkVersion, proj, conf, identity)).ErrorCount > 0)
					return result;
			} finally {
				//if packaging failed, make sure that it's marked as needing building
				if (result.ErrorCount > 0 && File.Exists (conf.AppDirectory.Combine ("PkgInfo")))
					File.Delete (conf.AppDirectory.Combine ("PkgInfo"));	
			}	
			
			//TODO: create/update the xcode project
			return result;
		}
		static BuildResult ProcessPackaging (IProgressMonitor monitor, IPhoneSdkVersion sdkVersion, IPhoneProject proj,
			IPhoneProjectConfiguration conf, IPhoneAppIdentity identity)
		{
			//don't bother signing in the sim
			bool isDevice = conf.Platform == IPhoneProject.PLAT_IPHONE;
			if (!isDevice)
				return null;
			
			BuildResult result = new BuildResult ();
			
			var pkgInfo = conf.AppDirectory.Combine ("PkgInfo");
			if (!File.Exists (pkgInfo))
				using (var f = File.OpenWrite (pkgInfo))
					f.Write (new byte [] { 0X41, 0X50, 0X50, 0X4C, 0x3f, 0x3f, 0x3f, 0x3f}, 0, 8);
			
			if (result.Append (CompressResources (monitor, conf)).ErrorCount > 0)
				return result;
			
			if (result.Append (EmbedProvisioningProfile (monitor, conf, identity.Profile)).ErrorCount > 0)
				return result;
			
			string xcent;
			if (result.Append (GenXcent (monitor, sdkVersion, proj, conf, identity, out xcent)).ErrorCount > 0)
				return result;
			
			string resRules;
			if (result.Append (PrepareResourceRules (monitor, sdkVersion, conf, out resRules)).ErrorCount > 0)
				return result;
			
			if (result.Append (SignAppBundle (monitor, proj, conf, identity.SigningKey, resRules, xcent)).ErrorCount > 0)
				return result;
			
			return result;
		}
		BuildResult UpdateInfoPlist (IProgressMonitor monitor, IPhoneSdkVersion sdkVersion, IPhoneProject proj,
			IPhoneProjectConfiguration conf, IPhoneAppIdentity identity, ProjectFile template, string plistOut)
		{
			return MacBuildUtilities.CreateMergedPlist (monitor, template, plistOut, (PlistDocument doc) => {
				var result = new BuildResult ();
				var dict = doc.Root as PlistDictionary;
				if (dict == null)
					doc.Root = dict = new PlistDictionary ();
				
				bool sim = conf.Platform != IPhoneProject.PLAT_IPHONE;
				bool v3_2_orNewer = sdkVersion >= IPhoneSdkVersion.V3_2;
				bool v3_1_orNewer = sdkVersion >= IPhoneSdkVersion.V3_1;
				bool v4_0_orNewer = sdkVersion >= IPhoneSdkVersion.V4_0;
				bool supportsIPhone = (proj.SupportedDevices & TargetDevice.IPhone) != 0;
				bool supportsIPad = (proj.SupportedDevices & TargetDevice.IPad) != 0;
				
				var sdkSettings = IPhoneFramework.GetSdkSettings (sdkVersion);
				var dtSettings = IPhoneFramework.GetDTSettings ();
				
				SetIfNotPresent (dict, "BuildMachineOSBuild", dtSettings.BuildMachineOSBuild);
				
				SetIfNotPresent (dict, "CFBundleDevelopmentRegion",
					String.IsNullOrEmpty (proj.BundleDevelopmentRegion)? "en" : proj.BundleDevelopmentRegion);
				
				SetIfNotPresent (dict, "CFBundleDisplayName", proj.BundleDisplayName ?? proj.Name);
				SetIfNotPresent (dict, "CFBundleExecutable", conf.NativeExe.FileName);
				
				// < 3.2 icon
				if (supportsIPhone) {
					if (!dict.ContainsKey ("CFBundleIconFile")) {
						var icon = proj.BundleIcon.ToRelative (proj.BaseDirectory);
						if (icon.IsNullOrEmpty || icon.ToString () == ".")
							result.AddWarning ("Application bundle icon has not been set (iPhone Application options panel)");
						else
							dict ["CFBundleIconFile"] = icon.FileName;
					}
				}
				
				//newer icons - see http://developer.apple.com/library/ios/#qa/qa2010/qa1686.html
				if (v3_2_orNewer && !dict.ContainsKey ("CFBundleIconFiles")) {
					var arr = new PlistArray ();
					dict["CFBundleIconFiles"] = arr;
					
					if (supportsIPhone)
						AddIconRelativeIfNotEmpty (proj, arr, proj.BundleIcon, "Icon.png");
					
					if (v4_0_orNewer && supportsIPhone)
						if (!AddIconRelativeIfNotEmpty (proj, arr, proj.BundleIconHigh, "*****@*****.**"))
							result.AddWarning ("iPhone high res bundle icon has not been set (iPhone Application options panel)");
					
					if (supportsIPad)
						if (!AddIconRelativeIfNotEmpty (proj, arr, proj.BundleIconIPad, "Icon-72.png"))
							result.AddWarning ("iPad bundle icon has not been set (iPhone Application options panel)");
					
					AddIconRelativeIfNotEmpty (proj, arr, proj.BundleIconSpotlight, "Icon-Small.png");
					
					if (supportsIPad)
						AddIconRelativeIfNotEmpty (proj, arr, proj.BundleIconIPadSpotlight, "Icon-Small-50.png");
					
					if (v4_0_orNewer && supportsIPhone)
						AddIconRelativeIfNotEmpty (proj, arr, proj.BundleIconSpotlightHigh, "*****@*****.**");
				}
				
				SetIfNotPresent (dict, "CFBundleIdentifier", identity.BundleID);
				SetIfNotPresent (dict, "CFBundleInfoDictionaryVersion", "6.0");
				SetIfNotPresent (dict, "CFBundleName", proj.Name);
				SetIfNotPresent (dict, "CFBundlePackageType", "APPL");
				if (!sim)
					dict["CFBundleResourceSpecification"] = "ResourceRules.plist";
				SetIfNotPresent (dict, "CFBundleSignature", "????");
				SetIfNotPresent (dict,  "CFBundleSupportedPlatforms",
					new PlistArray () { sim? "iPhoneSimulator" : "iPhoneOS" });
				SetIfNotPresent (dict, "CFBundleVersion", proj.BundleVersion ?? "1.0");
				
				if (!sim) {
					SetIfNotPresent (dict, "DTCompiler", sdkSettings.DTCompiler);
					SetIfNotPresent (dict, "DTPlatformBuild", dtSettings.DTPlatformBuild);
					SetIfNotPresent (dict, "DTSDKBuild", sdkSettings.DTSDKBuild);
				}
				SetIfNotPresent (dict, "DTPlatformName", sim? "iphonesimulator" : "iphoneos");
				if (!sim) {
					SetIfNotPresent (dict, "DTPlatformVersion", dtSettings.DTPlatformVersion);
				}
				SetIfNotPresent (dict, "DTSDKName", sim? sdkSettings.AlternateSDK : sdkSettings.CanonicalName);
				if (!sim) {
					SetIfNotPresent (dict, "DTXcode", dtSettings.DTXcode);
					SetIfNotPresent (dict, "DTXcodeBuild", dtSettings.DTXcodeBuild);
				}
				
				SetIfNotPresent (dict,  "LSRequiresIPhoneOS", true);
				if (v3_2_orNewer)
					SetIfNotPresent (dict,  "UIDeviceFamily", GetSupportedDevices (proj.SupportedDevices));
				
				if (v3_1_orNewer) {
					if (conf.MtouchArch != MtouchArch.ARMv6_ARMv7) {
						var val = conf.MtouchArch == MtouchArch.ARMv6? "armv6" : "armv7";
						var key = "UIRequiredDeviceCapabilities";
						var caps = dict.TryGetValue (key) ?? (dict[key] = new PlistArray ());
						var a = caps as PlistArray;
						if (a != null) {
							a.Add (val);
						} else {
							var d = (PlistDictionary) caps;
							d[val] = new PlistBoolean (true);
						}
					}
				}
				
				SetIfNotPresent (dict, "MinimumOSVersion", conf.MtouchMinimumOSVersion);
				
				SetNibProperty (dict, proj, proj.MainNibFile, "NSMainNibFile");
				if (proj.SupportedDevices == TargetDevice.IPhoneAndIPad)
					SetNibProperty (dict, proj, proj.MainNibFileIPad, "NSMainNibFile~ipad");
				
				
				if (v3_2_orNewer) {
					if (!dict.ContainsKey (OrientationUtil.KEY)) {
						result.AddWarning ("Supported orientations have not been set (iPhone Application options panel)");
					} else {
						var val = OrientationUtil.Parse ((PlistArray)dict[OrientationUtil.KEY]);
						if (!OrientationUtil.IsValidPair (val))
							result.AddWarning ("Supported orientations are not matched pairs (Info.plist)");
						if (dict.ContainsKey (OrientationUtil.KEY_IPAD)) {
							var pad = OrientationUtil.Parse ((PlistArray)dict[OrientationUtil.KEY_IPAD]);
							if (pad != Orientation.None && !OrientationUtil.IsValidPair (pad))
								result.AddWarning ("iPad orientations are not matched pairs (Info.plist)");
						}
					}
				}   
				
				return result;
			});
		}
		static BuildResult GenXcent (IProgressMonitor monitor, IPhoneSdkVersion sdkVersion, IPhoneProject proj, 
			IPhoneProjectConfiguration conf, IPhoneAppIdentity identity, out string xcentName)
		{
			xcentName = conf.CompiledOutputName.ChangeExtension (".xcent");
			
			monitor.BeginTask (GettextCatalog.GetString ("Processing entitlements file"), 0);
			
			string srcFile;
			
			if (!string.IsNullOrEmpty (conf.CodesignEntitlements)) {
				if (!File.Exists (conf.CodesignEntitlements))
					return BuildError ("Entitlements file \"" + conf.CodesignEntitlements + "\" not found.");
				srcFile = conf.CodesignEntitlements;
			} else {
				srcFile = "/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS" + sdkVersion.ToString ()
					+ ".sdk/Entitlements.plist";
			}
			
			var doc = new PlistDocument ();
			try {
				doc.LoadFromXmlFile (srcFile);
			} catch (Exception ex) {
				monitor.Log.WriteLine (ex.ToString ());
				return BuildError ("Error loading entitlements source file '" + srcFile +"'.");
			}
			
			//insert the app ID into the plist at the beginning
			var oldDict = doc.Root as PlistDictionary;
			var newDict = new PlistDictionary ();
			doc.Root = newDict;
			newDict["application-identifier"] = identity.AppID;
			var keychainGroups = new PlistArray (new [] { identity.AppID } );
			newDict["keychain-access-groups"] = keychainGroups;
			
			//merge in the user's values
			foreach (var item in oldDict) {
				//FIXME: we currently ignore these items, and write our own, but maybe we should do substitutes
				//i.e. $(AppIdentifierPrefix)$(CFBundleIdentifier)
				if (item.Key == "application-identifier") {
					var str = item.Value as PlistString;
					if (str == null || string.IsNullOrEmpty (str.Value) || str.Value.Contains ('$'))
						continue;
				} else if (item.Key == "keychain-access-groups") {
					//special handling, merge into the array
					var keyArr = item.Value as PlistArray;
					foreach (var key in keyArr) {
						var str = key as PlistString;
						if (str != null && !string.IsNullOrEmpty (str.Value) && !str.Value.Contains ('$')) {
							keychainGroups.Add (str.Value);
						}
					}
					continue;
				}
				newDict[item.Key] = item.Value;
			}
			
			//merge in the settings from the provisioning profile, skipping some
			foreach (var item in identity.Profile.Entitlements)
				if (item.Key != "application-identifier" && item.Key != "keychain-access-groups")
					newDict[item.Key] = item.Value;
			
			try {
				WriteXcent (doc, xcentName);
			} catch (Exception ex) {
				monitor.Log.WriteLine (ex.ToString ());
				return BuildError ("Error writing entitlements file '" + xcentName +"'.");
			}
			
			monitor.EndTask ();
			return null;
		}
		protected override BuildResult Build (IProgressMonitor monitor, SolutionEntityItem item, ConfigurationSelector configuration)
		{
			IPhoneProject proj = item as IPhoneProject;
			if (proj == null || proj.CompileTarget != CompileTarget.Exe)
				return base.Build (monitor, item, configuration);
			
			//prebuild
			var conf = (IPhoneProjectConfiguration) proj.GetConfiguration (configuration);
			bool isDevice = conf.Platform == IPhoneProject.PLAT_IPHONE;
			
			if (!IPhoneFramework.SdkIsInstalled (conf.MtouchSdkVersion)) {
				var r = new BuildResult ();
				//FIXME: fall back to higher SDK?
				r.AddError (string.Format ("Apple iPhone SDK version '{0}' is not installed", conf.MtouchSdkVersion));
				return r;
			}
			
			if (IPhoneFramework.SimOnly && isDevice) {
				//if in the GUI, show a dialog too
				if (MonoDevelop.Ide.IdeApp.IsInitialized)
					Gtk.Application.Invoke (delegate { IPhoneFramework.ShowSimOnlyDialog (); } );
				return IPhoneFramework.GetSimOnlyError ();
			}
			
			BuildResult result = null;
			IPhoneAppIdentity identity = null;
			if (isDevice) {
				monitor.BeginTask (GettextCatalog.GetString ("Detecting signing identity..."), 0);
				if ((result = GetIdentity (monitor, proj, conf, out identity)).ErrorCount > 0)
					return result;
				monitor.Log.WriteLine ("Provisioning profile: \"{0}\" ({1})", identity.Profile.Name, identity.Profile.Uuid);
				monitor.Log.WriteLine ("Signing Identity: \"{0}\"", Keychain.GetCertificateCommonName (identity.SigningKey));
				monitor.Log.WriteLine ("App ID: \"{0}\"", identity.AppID);
				monitor.EndTask ();
			} else {
				identity = new IPhoneAppIdentity () {
					BundleID = !string.IsNullOrEmpty (proj.BundleIdentifier)?
						proj.BundleIdentifier : GetDefaultBundleID (proj, null)
				};
			}
			
			result = base.Build (monitor, item, configuration).Append (result);
			if (result.ErrorCount > 0)
				return result;
			
			if (!Directory.Exists (conf.AppDirectory))
				Directory.CreateDirectory (conf.AppDirectory);
			
			FilePath mtouchOutput = conf.NativeExe;
			if (new FilePair (conf.CompiledOutputName, mtouchOutput).NeedsBuilding ()) {
				BuildResult error;
				var mtouch = GetMTouch (proj, monitor, out error);
				if (error != null)
					return error.Append (result);
				
				var args = new StringBuilder ();
				//FIXME: make verbosity configurable?
				args.Append (" -v");
				
				args.Append (" --nomanifest --nosign");
					
				//FIXME: should we error out if the platform is invalid?
				if (conf.Platform == IPhoneProject.PLAT_IPHONE) {
					args.AppendFormat (" -dev \"{0}\" ", conf.AppDirectory);
				} else {
					args.AppendFormat (" -sim \"{0}\" ", conf.AppDirectory);
				}
				
				foreach (string asm in proj.GetReferencedAssemblies (configuration).Distinct ())
					args.AppendFormat (" -r=\"{0}\"", asm);
				
				AppendExtrasMtouchArgs (args, proj, conf);
				
				args.AppendFormat (" \"{0}\"", conf.CompiledOutputName);
				
				mtouch.WorkingDirectory = conf.OutputDirectory;
				mtouch.Arguments = args.ToString ();
				
				monitor.BeginTask (GettextCatalog.GetString ("Compiling to native code"), 0);
				
				string output;
				int code;
				monitor.Log.WriteLine ("{0} {1}", mtouch.FileName, mtouch.Arguments);
				if ((code = ExecuteCommand (monitor, mtouch, out output)) != 0) {
					if (String.IsNullOrEmpty (output)) {
						result.AddError (null, 0, 0, code.ToString (), "mtouch failed with no output");
					} else {
						result.AddError (null, 0, 0, code.ToString (), "mtouch failed with the following message:\n" + output);
					}
					return result;
				}
				
				monitor.EndTask ();
			}
			
			//create the info.plist, merging in the template if it exists
			var plistOut = conf.AppDirectory.Combine ("Info.plist");
			ProjectFile appInfoIn = proj.Files.GetFile (proj.BaseDirectory.Combine ("Info.plist"));
			if (new FilePair (proj.FileName, plistOut).NeedsBuilding () ||
			    	(appInfoIn != null && new FilePair (appInfoIn.FilePath, plistOut).NeedsBuilding ())) {
				try {
					monitor.BeginTask (GettextCatalog.GetString ("Updating application manifest"), 0);
					if (result.Append (UpdateInfoPlist (monitor, proj, conf, identity, appInfoIn, plistOut)).ErrorCount > 0)
						return result;
				} finally {
					monitor.EndTask ();
				}
			}
			
			//create the Setting.bundle plist for debug settings, merging in the template if it exists
			try {
				monitor.BeginTask (GettextCatalog.GetString ("Updating debug settings manifest"), 0);
				var sbRootRel = Path.Combine ("Settings.bundle", "Root.plist");
				var sbRootOut = conf.AppDirectory.Combine (sbRootRel);
				var sbRootIn  = proj.Files.GetFile (proj.BaseDirectory.Combine (sbRootRel));
				if (result.Append (UpdateDebugSettingsPlist (monitor, conf, sbRootIn, sbRootOut)).ErrorCount > 0)
					return result;
			} finally {
				monitor.EndTask ();
			}
			
			try {
				if (result.Append (ProcessPackaging (monitor, proj, conf, identity)).ErrorCount > 0)
					return result;
			} finally {
				//if packaging failed, make sure that it's marked as needing buildind
				if (result.ErrorCount > 0 && File.Exists (conf.AppDirectory.Combine ("PkgInfo")))
					File.Delete (conf.AppDirectory.Combine ("PkgInfo"));	
			}	
			
			//TODO: create/update the xcode project
			return result;
		}
		BuildResult UpdateInfoPlist (IProgressMonitor monitor, IPhoneProject proj, IPhoneProjectConfiguration conf,
		                             IPhoneAppIdentity identity, ProjectFile template, string plistOut)
		{
			return CreateMergedPlist (monitor, conf, template, plistOut, 
				(IPhoneProjectConfiguration config, PlistDocument doc) => 
			{
				var result = new BuildResult ();
				var dict = doc.Root as PlistDictionary;
				if (dict == null)
					doc.Root = dict = new PropertyList.PlistDictionary ();
				
				bool sim = conf.Platform != IPhoneProject.PLAT_IPHONE;
				
				SetIfNotPresent (dict, "CFBundleDevelopmentRegion",
					String.IsNullOrEmpty (proj.BundleDevelopmentRegion)? "English" : proj.BundleDevelopmentRegion);
				
				SetIfNotPresent (dict, "CFBundleDisplayName", proj.BundleDisplayName ?? proj.Name);
				SetIfNotPresent (dict, "CFBundleExecutable", conf.NativeExe.FileName);
				
				//iphone icons
				if ((proj.SupportedDevices & TargetDevice.IPhone) != 0) {
					if (!dict.ContainsKey ("CFBundleIconFile")) {
						var icon = proj.BundleIcon.ToRelative (proj.BaseDirectory);
						if (icon.IsNullOrEmpty || icon.ToString () == ".")
							result.AddWarning ("Application bundle icon has not been set");
						else
							dict ["CFBundleIconFile"] = icon.FileName;
					}
				}
				
				//ipad and universal icons
				if ((proj.SupportedDevices & TargetDevice.IPad) != 0 && !dict.ContainsKey ("CFBundleIconFiles")) {
					var arr = new PlistArray ();
					dict["CFBundleIconFiles"] = arr;
					//universal only
					if ((proj.SupportedDevices & TargetDevice.IPhone) != 0)
						AddRelativeIfNotEmpty (proj, arr, proj.BundleIcon);
					//ipad and universal
					AddRelativeIfNotEmpty (proj, arr, proj.BundleIconSpotlight);
					AddRelativeIfNotEmpty (proj, arr, proj.BundleIconIPadSpotlight);
					if (!AddRelativeIfNotEmpty (proj, arr, proj.BundleIconIPad))
						result.AddWarning ("iPad bundle icon has not been set");
				}
				
				SetIfNotPresent (dict, "CFBundleIdentifier", identity.BundleID);
				SetIfNotPresent (dict, "CFBundleInfoDictionaryVersion", "6.0");
				SetIfNotPresent (dict, "CFBundleName", proj.Name);
				SetIfNotPresent (dict, "CFBundlePackageType", "APPL");
				if (!sim)
					dict["CFBundleResourceSpecification"] = "ResourceRules.plist";
				SetIfNotPresent (dict, "CFBundleSignature", "????");
				SetIfNotPresent (dict,  "CFBundleSupportedPlatforms",
					new PropertyList.PlistArray () { sim? "iPhoneSimulator" : "iPhoneOS" });
				SetIfNotPresent (dict, "CFBundleVersion", proj.BundleVersion ?? "1.0");
				SetIfNotPresent (dict, "DTPlatformName", sim? "iphonesimulator" : "iphoneos");
				SetIfNotPresent (dict, "DTSDKName", (sim? "iphonesimulator" : "iphoneos")  + conf.MtouchSdkVersion);
				SetIfNotPresent (dict,  "LSRequiresIPhoneOS", true);
				if (proj.SupportedDevices != TargetDevice.IPhone)
					SetIfNotPresent (dict,  "UIDeviceFamily", GetSupportedDevices (proj.SupportedDevices));
				SetIfNotPresent (dict, "DTPlatformVersion", conf.MtouchSdkVersion);
				
				SetIfNotPresent (dict, "MinimumOSVersion", conf.MtouchMinimumOSVersion);
				
				SetNibProperty (dict, proj, proj.MainNibFile, "NSMainNibFile");
				if (proj.SupportedDevices == TargetDevice.IPhoneAndIPad)
					SetNibProperty (dict, proj, proj.MainNibFileIPad, "NSMainNibFile~ipad");
				
				return result;
			});
		}
		BuildResult UpdateInfoPlist (IProgressMonitor monitor, IPhoneProject proj, IPhoneProjectConfiguration conf,
		                             IPhoneAppIdentity identity, ProjectFile template, string plistOut)
		{
			return MacBuildUtilities.CreateMergedPlist (monitor, template, plistOut, (PlistDocument doc) => {
				var result = new BuildResult ();
				var dict = doc.Root as PlistDictionary;
				if (dict == null)
					doc.Root = dict = new PlistDictionary ();
				
				bool sim = conf.Platform != IPhoneProject.PLAT_IPHONE;
				var sdkversion = IPhoneSdkVersion.Parse (conf.MtouchSdkVersion);
				bool v3_2_orNewer = sdkversion.CompareTo (IPhoneSdkVersion.V3_2) >= 0;
				bool v4_0_orNewer = sdkversion.CompareTo (IPhoneSdkVersion.V4_0) >= 0;
				bool supportsIPhone = (proj.SupportedDevices & TargetDevice.IPhone) != 0;
				bool supportsIPad = (proj.SupportedDevices & TargetDevice.IPad) != 0;
				
				SetIfNotPresent (dict, "CFBundleDevelopmentRegion",
					String.IsNullOrEmpty (proj.BundleDevelopmentRegion)? "English" : proj.BundleDevelopmentRegion);
				
				SetIfNotPresent (dict, "CFBundleDisplayName", proj.BundleDisplayName ?? proj.Name);
				SetIfNotPresent (dict, "CFBundleExecutable", conf.NativeExe.FileName);
				
				// < 3.2 icon
				if (supportsIPhone) {
					if (!dict.ContainsKey ("CFBundleIconFile")) {
						var icon = proj.BundleIcon.ToRelative (proj.BaseDirectory);
						if (icon.IsNullOrEmpty || icon.ToString () == ".")
							result.AddWarning ("Application bundle icon has not been set (iPhone Application options panel)");
						else
							dict ["CFBundleIconFile"] = icon.FileName;
					}
				}
				
				//newer icons
				if (v3_2_orNewer && !dict.ContainsKey ("CFBundleIconFiles")) {
					var arr = new PlistArray ();
					dict["CFBundleIconFiles"] = arr;
					
					if (supportsIPhone)
						AddIconRelativeIfNotEmpty (proj, arr, proj.BundleIcon);
					
					AddIconRelativeIfNotEmpty (proj, arr, proj.BundleIconSpotlight, "Icon-Small.png");
					if (supportsIPad) {
						AddIconRelativeIfNotEmpty (proj, arr, proj.BundleIconIPadSpotlight, "Icon-Small-50.png");
						if (!AddIconRelativeIfNotEmpty (proj, arr, proj.BundleIconIPad))
							result.AddWarning ("iPad bundle icon has not been set (iPhone Application options panel)");
					}
					
					if (v4_0_orNewer) {
						if (supportsIPhone) {
							if (!AddIconRelativeIfNotEmpty (proj, arr, proj.BundleIconHigh))
								result.AddWarning ("iPhone high res bundle icon has not been set (iPhone Application options panel)");
							AddIconRelativeIfNotEmpty (proj, arr, proj.BundleIconSpotlightHigh, "*****@*****.**");
						}
					}
				}
				
				SetIfNotPresent (dict, "CFBundleIdentifier", identity.BundleID);
				SetIfNotPresent (dict, "CFBundleInfoDictionaryVersion", "6.0");
				SetIfNotPresent (dict, "CFBundleName", proj.Name);
				SetIfNotPresent (dict, "CFBundlePackageType", "APPL");
				if (!sim)
					dict["CFBundleResourceSpecification"] = "ResourceRules.plist";
				SetIfNotPresent (dict, "CFBundleSignature", "????");
				SetIfNotPresent (dict,  "CFBundleSupportedPlatforms",
					new PlistArray () { sim? "iPhoneSimulator" : "iPhoneOS" });
				SetIfNotPresent (dict, "CFBundleVersion", proj.BundleVersion ?? "1.0");
				SetIfNotPresent (dict, "DTPlatformName", sim? "iphonesimulator" : "iphoneos");
				SetIfNotPresent (dict, "DTSDKName", IPhoneFramework.GetDTSdkName (sdkversion, sim));
				SetIfNotPresent (dict,  "LSRequiresIPhoneOS", true);
				if (v3_2_orNewer)
					SetIfNotPresent (dict,  "UIDeviceFamily", GetSupportedDevices (proj.SupportedDevices));
				SetIfNotPresent (dict, "DTPlatformVersion", IPhoneFramework.DTPlatformVersion);
				
				SetIfNotPresent (dict, "MinimumOSVersion", conf.MtouchMinimumOSVersion);
				
				SetNibProperty (dict, proj, proj.MainNibFile, "NSMainNibFile");
				if (proj.SupportedDevices == TargetDevice.IPhoneAndIPad)
					SetNibProperty (dict, proj, proj.MainNibFileIPad, "NSMainNibFile~ipad");
				
				
				if (v3_2_orNewer) {
					if (!dict.ContainsKey (OrientationUtil.KEY)) {
						result.AddWarning ("Supported orientations have not been set (iPhone Application options panel)");
					} else {
						var val = OrientationUtil.Parse ((PlistArray)dict[OrientationUtil.KEY]);
						if (!OrientationUtil.IsValidPair (val))
							result.AddWarning ("Supported orientations are not matched pairs (Info.plist)");
						if (dict.ContainsKey (OrientationUtil.KEY_IPAD)) {
							var pad = OrientationUtil.Parse ((PlistArray)dict[OrientationUtil.KEY_IPAD]);
							if (pad != Orientation.None && !OrientationUtil.IsValidPair (pad))
								result.AddWarning ("iPad orientations are not matched pairs (Info.plist)");
						}
					}
				}   
				
				return result;
			});
		}