global.json generation: added version cleanup to support Metalama.Tests.DotNetSdk.

Author: gfraiteur

src/PostSharp.Engineering.BuildTools/Build/Files/GlobalJsonFile.cs

@@ -2,6 +2,7 @@
 
 using PostSharp.Engineering.BuildTools.Build.Model;
 using PostSharp.Engineering.BuildTools.Utilities;
+using System;
 using System.IO;
 
 namespace PostSharp.Engineering.BuildTools.Build.Files;
@@ -11,6 +12,36 @@ namespace PostSharp.Engineering.BuildTools.Build.Files;
 /// </summary>
 internal static class GlobalJsonFile
 {
+    /// <summary>
+    /// Cleans a version string returned by dotnet-install.ps1. 
+    /// </summary>
+    private static string? CleanSdkVersion( BuildContext context, string? input )
+    {
+        if ( input == null )
+        {
+            return null;
+        }
+
+        var versionParts = input.Split( '-' );
+
+        var version = versionParts.Length > 1 && (
+
+            // On Linux, the dotnet-install.ps1 returns a version with "-servicing.<build>" suffix, but the SDK version is without it.
+            versionParts[1].StartsWith( "servicing", StringComparison.Ordinal )
+
+            // On Linux, the dotnet-install.ps1 returns a version with "-rtm.<build>" suffix, but the SDK version is without it.
+            || versionParts[1].StartsWith( "rtm", StringComparison.Ordinal ))
+            ? versionParts[0]
+            : input;
+
+        if ( version != input )
+        {
+            context.Console.WriteImportantMessage( $"Overriding version {input} to {version}." );
+        }
+
+        return version;
+    }
+
     internal static bool TryWrite( BuildContext context, string? overrideSdkVersion = null )
     {
         var product = context.Product;
@@ -53,7 +84,7 @@ internal static bool TryWrite( BuildContext context, string? overrideSdkVersion
               {
                 "//": "This file is generated by PostSharp.Engineering. Do not edit or add to git.",
                 "sdk": {
-                  "version": "{{overrideSdkVersion ?? product.DotNetSdkVersion.Version}}",
+                  "version": "{{CleanSdkVersion( context, overrideSdkVersion ) ?? product.DotNetSdkVersion.Version}}",
                   "rollForward": "{{rollForward}}",
                   "allowPrerelease": {{product.DotNetSdkVersion.AllowPrerelease.ToString().ToLowerInvariant()}}
                 },