BuildTools: Add --profile='' parameter to BuildTools to only do one profile out of the config (#1340)

Author: Beyley

src/Core/Silk.NET.BuildTools/Program.cs

@@ -48,30 +48,60 @@ public static int Main(string[] args)
                 return 1;
             }
 
+            //If this is set it will scope the generation to only a single profile, eg only OpenGL or only WebGPU
+            string profile = null;
+
             var sw = Stopwatch.StartNew();
             var extraCtrls = new List<string>();
             var failedJobs = 0;
             Console.SetOut(ConsoleWriter.GetOrCreate(Console.Out));
+
+            //do one pass over the arguments, picking out the things that start with `--` (eg. control descriptors)
             foreach (var arg in args)
             {
+                if (!arg.StartsWith("--"))
+                {
+                    continue;
+                }
+
+                if (arg.StartsWith("--profile="))
+                {
+                    profile = arg.Substring("--profile=".Length);
+                    continue;
+                }
+
                 if (string.Equals(arg, "--no-parallel", StringComparison.OrdinalIgnoreCase))
                 {
                     // picked up in Generator.cs
                     continue;
                 }
 
+                Console.WriteLine($"Control descriptor \"{arg}\" will be applied to every job herein.");
+                extraCtrls.Add(arg[2..]);
+            }
+
+            //do a second pass over the arguments, picking out the things that dont start with `--` (eg. files)
+            foreach (var arg in args)
+            {
                 if (arg.StartsWith("--"))
                 {
-                    Console.WriteLine($"Control descriptor \"{arg}\" will be applied to every job herein.");
-                    extraCtrls.Add(arg[2..]);
                     continue;
                 }
 
                 var jobSw = Stopwatch.StartNew();
                 var abs = Path.GetFullPath(arg);
                 Environment.CurrentDirectory = Path.GetDirectoryName
                     (abs) ?? throw new NullReferenceException("Dir path null.");
-                Generator.Run(AddDescriptors(JsonConvert.DeserializeObject<Config>(File.ReadAllText(abs)), extraCtrls));
+
+                var config = JsonConvert.DeserializeObject<Config>(File.ReadAllText(abs));
+
+                //if the profile scope is set, set the tasks to generate to *only* the task that matches the name
+                if(profile != null)
+                {
+                    config.Tasks = config.Tasks.Where(x => x.Name.Equals(profile, StringComparison.InvariantCultureIgnoreCase)).ToArray();
+                }
+
+                Generator.Run(AddDescriptors(config, extraCtrls));
 
                 jobSw.Stop();
                 Thread.Sleep(3000); // cooldown to ensure all the threads have reported their results.