Build: better tag query

Build: better Information calls

build.cake

@@ -2,6 +2,8 @@
 #tool nuget:?package=vswhere&version=2.8.4
 #tool nuget:?package=GitVersion.CommandLine&version=5.1.3
 
+#addin nuget:https://api.nuget.org/v3/index.json?package=Cake.Json&version=4.0.0
+#addin nuget:https://api.nuget.org/v3/index.json?package=Newtonsoft.Json&version=11.0.2
 #addin nuget:https://api.nuget.org/v3/index.json?package=Cake.FileHelpers&version=3.2.1
 
 using System.Net;
@@ -32,11 +34,11 @@ var msBuildPathX64 = (vsLatest == null) ? null : vsLatest.CombineWithFilePath(".
 
 Setup(context =>{
 	nupkgDir = $"{artifactsDir.ToString()}/nupkg";
-	Information($"Started at {DateTime.Now}");
+	Information("Started at {0}", DateTime.Now);
 });
 
 Teardown(context =>{
-	Information($"Finished at {DateTime.Now}");
+	Information("Finished at {0}", DateTime.Now);
 });
 
 Task("Clean")
@@ -57,7 +59,7 @@ Task("Clean")
 	directoriesToClean.Add(artifactsDir);
 
 	foreach(var dir in directoriesToClean) {
-		Information($"Cleaning {dir.ToString()}");
+		Information("Cleaning {0}", dir.ToString());
 		if (DirectoryExists(dir)) {
 			DeleteDirectory(dir, settings);
 			CreateDirectory(dir);
@@ -99,7 +101,7 @@ Task("GitVersion")
 	}
 	var index = version.IndexOf("-");
 	semanticVersion = index > 0 ? version.Substring(0, index) : version;
-	Information($"Version: {version}, SemanticVersion: {semanticVersion}");
+	Information("Version: {0}, SemanticVersion: {1}", version, semanticVersion);
 });
 
 Task("UpdateAssemblyInfo")
@@ -124,57 +126,46 @@ Task("UpdateAssemblyInfo")
 Task("GitlabRelease")
 .IsDependentOn("GitVersion")
 .Does(() => {
-IEnumerable<string> redirectedStandardOutput;
-	var exitCodeWithArgument =
-		StartProcess(
-			"git",
-			new ProcessSettings {
-				Arguments = "describe --tags --abbrev=0",
-				RedirectStandardOutput = true
-			},
-			out redirectedStandardOutput
-		);
+	var client = new HttpClient();
+	client.DefaultRequestHeaders.Add("PRIVATE-TOKEN", gitlabToken);
 	
-	var lastTag = redirectedStandardOutput.LastOrDefault();
-	var logParam = "";
-	if(exitCodeWithArgument == 0) {
-		logParam = $"{lastTag}..Head";
-	} else {
-		lastTag = null;
+	// get the latest tag
+	var result = client.GetAsync($"https://git.rwth-aachen.de/api/v4/projects/{gitlabProjectId}/repository/tags").Result;
+	if(!result.IsSuccessStatusCode) {
+		throw new Exception("Tag query failed.");
 	}
 
-	string url = null;
-	if(lastTag != null) {
-		if(String.IsNullOrWhiteSpace(gitlabProjectPath)) {
-			exitCodeWithArgument =
-				StartProcess(
-					"git",
-					new ProcessSettings {
-						Arguments = $"config --get remote.origin.url",
-						RedirectStandardOutput = true
-					},
-					out redirectedStandardOutput
-				);
+	var tagList = result.Content.ReadAsStringAsync().Result;
+	var jArray = JArray.Parse(tagList);
+	// null if not tags exists yet
+	var lastTag = jArray.FirstOrDefault();
 
-			url = redirectedStandardOutput.LastOrDefault();
-			if(url.StartsWith("git@git.rwth-aachen.de:")){
-				url = url.Replace("git@git.rwth-aachen.de:", "https://git.rwth-aachen.de/");
-			}
-		} else {
-			url = $"https://git.rwth-aachen.de/{gitlabProjectPath}";
-		}
+	var url = $"https://git.rwth-aachen.de/{gitlabProjectPath}";
 	
 	if(url.EndsWith(".git")) {
 		url = url.Substring(0, url.Length - ".git".Length);
 	}
+
 	if(url.EndsWith("/")) {
 		url = url.Substring(0, url.Length - 1);
 	}
 
-		url = $"{url}/compare/{lastTag}...v{semanticVersion}";
+	var description = "";
+	// First line of description
+	// Gitlab compare url, if something can be compared
+	if(lastTag == null) {
+		description = $"# {semanticVersion} ({DateTime.Now.Year}-{DateTime.Now.Month}-{DateTime.Now.Day})\n\n\n";
+	} else {
+		description = $"# [{semanticVersion}]({url}/compare/{lastTag}...v{semanticVersion}) ({DateTime.Now.Year}-{DateTime.Now.Month}-{DateTime.Now.Day})\n\n\n";
+	}
+
+	// From when will messages be parsed, null results in all messages
+	var logParam = "";
+	if(lastTag != null) {
+		logParam = $"{lastTag}..Head";
 	}
 
-	exitCodeWithArgument =
+	var exitCodeWithArgument =
 		StartProcess(
 			"git",
 			new ProcessSettings {
@@ -183,12 +174,6 @@ IEnumerable<string> redirectedStandardOutput;
 			},
 			out redirectedStandardOutput
 		);
-	var description = "";
-	if(lastTag == null) {
-		description = $"# {semanticVersion} ({DateTime.Now.Year}-{DateTime.Now.Month}-{DateTime.Now.Day})\n\n\n";
-	} else {
-		description = $"# [{semanticVersion}]({url}) ({DateTime.Now.Year}-{DateTime.Now.Month}-{DateTime.Now.Day})\n\n\n";
-	}
 
 	var prefixList = new Dictionary<string, List<string>>{
 		{"Fix", new List<string>()},
@@ -222,19 +207,25 @@ IEnumerable<string> redirectedStandardOutput;
 			description += "\n";
 		}
 	}
+	// correctly escape the json newlines
+	description = description.Replace("\n", "\\n");
 
 	// create tag
-	var client = new HttpClient();
 	client.DefaultRequestHeaders.Add("PRIVATE-TOKEN", gitlabToken);
-	var result = client.PostAsync($"https://git.rwth-aachen.de/api/v4/projects/{gitlabProjectId}/repository/tags?tag_name=v{semanticVersion}&ref=master", null).Result;
+	result = client.PostAsync($"https://git.rwth-aachen.de/api/v4/projects/{gitlabProjectId}/repository/tags?tag_name=v{semanticVersion}&ref=master", null).Result;
 	Information("Create tag: {0}", result.Content.ReadAsStringAsync().Result);
+	if(!result.IsSuccessStatusCode) {
+		throw new Exception("Tag creation failed.");
+	}
 
-	description = description.Replace("\n", "\\n");
 	// create release
 	var json = $"{{\"name\": \"v{semanticVersion}\", \"tag_name\": \"v{semanticVersion}\", \"description\": \"{description}\"}}";
 	var content = new StringContent(json, Encoding.UTF8, "application/json");
 	result = client.PostAsync($"https://git.rwth-aachen.de/api/v4/projects/{gitlabProjectId}/releases", content).Result;
 	Information("Create release: {0}", result.Content.ReadAsStringAsync().Result);
+	if(!result.IsSuccessStatusCode) {
+		throw new Exception("Release creation failed.");
+	}
 });
 
 Task("Build")
@@ -256,7 +247,7 @@ Task("Build")
 		}
 
 		// Use MSBuild
-		Information($"Building {solutionFile}");
+		Information("Building {0}", solutionFile);
 		MSBuild(solutionFile, frameworkSettingsWindows);
 });
 
@@ -307,7 +298,7 @@ Task("CopyToArtifacts")
 		&& !FileExists($"{project.GetDirectory()}/{project.GetFilenameWithoutExtension()}.nuspec")
 		&& DirectoryExists(project.GetDirectory()))
 		{
-			Information($"Copying {project.GetDirectory()}/bin/{configuration}/* to {artifactsDir}");
+			Information("Copying {0}/* to {1}", $"{project.GetDirectory()}/bin/{configuration}", artifactsDir);
 			CopyDirectory($"{project.GetDirectory()}/bin/{configuration}/", artifactsDir);
 		}
 	}