Output redirects.json artifact

Author: cotti

src/Elastic.Documentation/Serialization/SourceGenerationContext.cs

@@ -2,6 +2,7 @@
 // Elasticsearch B.V licenses this file to you under the Apache 2.0 License.
 // See the LICENSE file in the project root for more information
 
+using System.Collections.Frozen;
 using System.Text.Json.Serialization;
 using Elastic.Documentation.Links;
 using Elastic.Documentation.Search;
@@ -18,4 +19,5 @@ namespace Elastic.Documentation.Serialization;
 [JsonSerializable(typeof(LinkRegistry))]
 [JsonSerializable(typeof(LinkRegistryEntry))]
 [JsonSerializable(typeof(DocumentationDocument))]
+[JsonSerializable(typeof(FrozenDictionary<string, string>))]
 public sealed partial class SourceGenerationContext : JsonSerializerContext;

src/tooling/docs-assembler/Building/AssemblerBuilder.cs

@@ -3,10 +3,12 @@
 // See the LICENSE file in the project root for more information
 
 using System.Collections.Frozen;
+using System.Text.Json;
 using Documentation.Assembler.Exporters;
 using Documentation.Assembler.Navigation;
 using Elastic.Documentation.Legacy;
 using Elastic.Documentation.Links;
+using Elastic.Documentation.Serialization;
 using Elastic.Markdown;
 using Elastic.Markdown.Exporters;
 using Elastic.Markdown.Links.CrossLinks;
@@ -85,6 +87,8 @@ public async Task BuildAllAsync(FrozenDictionary<string, AssemblerDocumentationS
 			}
 		}
 
+		await OutputRedirectsAsync(redirects, ctx);
+
 		tasks = markdownExporters.Select(async e => await e.StopAsync(ctx));
 		await Task.WhenAll(tasks);
 	}
@@ -143,4 +147,16 @@ private void SetFeatureFlags(AssemblerDocumentationSet set)
 			set.DocumentationSet.Configuration.Features.Set(configurationFeatureFlag.Key, configurationFeatureFlag.Value);
 		}
 	}
+
+	private async Task OutputRedirectsAsync(Dictionary<string, string> redirects, Cancel ctx)
+	{
+		var uniqueRedirects = redirects
+			.Where(x => !x.Key.TrimEnd('/').Equals(x.Value.TrimEnd('/')))
+			.ToFrozenDictionary();
+		var redirectsFile = context.WriteFileSystem.FileInfo.New(Path.Combine(context.OutputDirectory.FullName, "redirects.json"));
+		_logger.LogInformation("Writing {Count} resolved redirects to {Path}", uniqueRedirects.Count, redirectsFile.FullName);
+
+		var redirectsJson = JsonSerializer.Serialize(uniqueRedirects, SourceGenerationContext.Default.FrozenDictionaryStringString);
+		await context.WriteFileSystem.File.WriteAllTextAsync(redirectsFile.FullName, redirectsJson, ctx);
+	}
 }