Working multi-versioning

Author: Perksey

eng/build/Build.Website.cs

@@ -1,6 +1,7 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+using System;
 using System.Collections.Generic;
 using System.IO;
 using System.Linq;
@@ -18,34 +19,39 @@ readonly record struct VersionDescription(
         AbsolutePath Path,
         AbsolutePath StaticPath,
         string Name,
-        bool IsSilk2
+        AbsolutePath? Changelog = null
     );
 
     // From oldest to newest. Last one is current.
+    const bool IsCurrentVersionPreview = true;
     VersionDescription[] Versions =>
         [
             new(
                 RootDirectory / "eng" / "submodules" / "silk.net-2.x" / "documentation",
                 RootDirectory / "eng" / "submodules" / "silk.net-2.x" / "documentation" / "images",
-                "v2",
-                true
+                "v2"
             ),
             new(
                 RootDirectory / "docs",
                 RootDirectory / "sources" / "Website" / "static" / "img",
                 "v3",
-                false
+                RootDirectory / "docs" / "CHANGELOG.md"
             ),
         ];
 
     readonly record struct JsonVersion(
-        string Label,
-        [property: JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)] string? Path
+        [property: JsonPropertyName("label")] string Label,
+        [property:
+            JsonPropertyName("path"),
+            JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)
+        ]
+            string? Path
     );
 
     void FullBuildWebsite()
     {
-        // Copy the current docs directory to a temporary directory, as we'll be making a lot of changes to this.
+        (RootDirectory / "sources" / "Website" / "node_modules").CreateOrCleanDirectory();
+        Npm("i", RootDirectory / "sources" / "Website");
         (TemporaryDirectory / "docs").CreateOrCleanDirectory();
         (RootDirectory / "docs").Copy(
             TemporaryDirectory / "docs",
@@ -83,10 +89,12 @@ void FullBuildWebsite()
                 }
 
                 jsonVersions[i == versions.Length - 1 ? "current" : version.Name] = new JsonVersion(
-                    Git($"describe --tags --abbrev=0", version.Path)
-                        .First(x => x.Type == OutputType.Std)
-                        .Text.Trim(),
-                    version.Name
+                    version.Changelog is { } changelog
+                        ? GetVersionFromChangelog(changelog)
+                        : Git($"describe --tags --abbrev=0", version.Path)
+                            .First(x => x.Type == OutputType.Std)
+                            .Text.Trim(),
+                    i == versions.Length - 1 ? version.Name : null
                 );
             }
 
@@ -95,7 +103,10 @@ void FullBuildWebsite()
                 RootDirectory / "sources" / "Website" / "silkversions.json",
                 JsonSerializer.Serialize(jsonVersions)
             );
-            Npm($"run build -- --out-dir {RootDirectory / "artifacts" / "docs"}");
+            Npm(
+                $"run build -- --out-dir {RootDirectory / "artifacts" / "docs" / "Silk.NET"}",
+                RootDirectory / "sources" / "Website"
+            );
         }
         finally
         {
@@ -114,4 +125,10 @@ void FullBuildWebsite()
             (TemporaryDirectory / "website").CreateOrCleanDirectory();
         }
     }
+
+    string GetVersionFromChangelog(AbsolutePath path)
+    {
+        GetVersionInfo(File.ReadAllText(path), out var ver, out var suffix, out _);
+        return string.IsNullOrWhiteSpace(suffix) ? $"v{ver}" : $"v{ver}-{suffix}";
+    }
 }