refactor(config): 将 appsettings.json 转为嵌入资源

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/Gpulse.WCT.DataAnalyzer/Gpulse.WCT.DataAnalyzer.csproj

@@ -10,6 +10,10 @@
     <LangVersion>12.0</LangVersion>
   </PropertyGroup>
 
+  <ItemGroup>
+    <InternalsVisibleTo Include="Gpulse.WCT.DataAnalyzer.Tests" />
+  </ItemGroup>
+
   <ItemGroup>
     <!-- CLI -->
     <PackageReference Include="System.CommandLine" Version="2.0.0-beta4.22272.1" />
@@ -36,9 +40,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <None Update="appsettings.json">
-      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
-    </None>
+    <EmbeddedResource Include="appsettings.json" />
   </ItemGroup>
 
 </Project>

src/Gpulse.WCT.DataAnalyzer/Program.cs

@@ -1,4 +1,6 @@
 using System.CommandLine;
+using System.Reflection;
+using System.Text.Json;
 using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Hosting;
@@ -97,8 +99,16 @@ public class Program
     {
         var builder = new ConfigurationBuilder()
             .SetBasePath(AppContext.BaseDirectory)
-            .AddJsonFile("appsettings.json", optional: false)
-            .AddJsonFile($"appsettings.{Environment.GetEnvironmentVariable("DOTNET_ENVIRONMENT") ?? "Production"}.json", optional: true)
+            .AddEmbeddedResourceJson(
+                Assembly.GetExecutingAssembly(),
+                "Gpulse.WCT.DataAnalyzer.appsettings.json")
+            .AddJsonFile(
+                Path.Combine(AppContext.BaseDirectory, "appsettings.json"),
+                optional: true, reloadOnChange: false)
+            .AddJsonFile(
+                Path.Combine(AppContext.BaseDirectory,
+                    $"appsettings.{Environment.GetEnvironmentVariable("DOTNET_ENVIRONMENT") ?? "Production"}.json"),
+                optional: true, reloadOnChange: false)
             .AddEnvironmentVariables()
             .AddCommandLine(args);
 
@@ -163,3 +173,84 @@ public class Program
             : Path.GetFullPath(Path.Combine(baseDirectory, value));
     }
 }
+
+// ── 嵌入资源配置加载 ──────────────────────────────────────────────────────────
+
+internal sealed class EmbeddedResourceJsonConfigurationProvider(
+    EmbeddedResourceJsonConfigurationSource source) : FileConfigurationProvider(source)
+{
+    public override void Load(Stream stream)
+    {
+        using var doc = JsonDocument.Parse(stream);
+        Data = FlattenJson(doc.RootElement);
+    }
+
+    public override void Load()
+    {
+        var assembly = source.Assembly;
+        var resourceName = source.ResourceName;
+
+        using var stream = assembly.GetManifestResourceStream(resourceName)
+            ?? throw new InvalidOperationException(
+                $"嵌入资源 '{resourceName}' 不存在。"
+                + $" 可用资源: [{string.Join(", ", assembly.GetManifestResourceNames())}]");
+
+        Load(stream);
+    }
+
+    private static Dictionary<string, string?> FlattenJson(JsonElement element)
+    {
+        var result = new Dictionary<string, string?>(StringComparer.OrdinalIgnoreCase);
+        Walk(element, "", result);
+        return result;
+
+        static void Walk(JsonElement el, string prefix, Dictionary<string, string?> bag)
+        {
+            switch (el.ValueKind)
+            {
+                case JsonValueKind.Object:
+                    foreach (var prop in el.EnumerateObject())
+                        Walk(prop.Value, string.IsNullOrEmpty(prefix) ? prop.Name : $"{prefix}:{prop.Name}", bag);
+                    break;
+                case JsonValueKind.Array:
+                    var i = 0;
+                    foreach (var item in el.EnumerateArray())
+                    {
+                        Walk(item, $"{prefix}:{i}", bag);
+                        i++;
+                    }
+                    break;
+                default:
+                    bag[prefix] = el.ToString();
+                    break;
+            }
+        }
+    }
+}
+
+internal sealed class EmbeddedResourceJsonConfigurationSource : FileConfigurationSource
+{
+    public Assembly Assembly { get; } = null!;
+    public string ResourceName { get; } = null!;
+
+    public EmbeddedResourceJsonConfigurationSource(Assembly assembly, string resourceName)
+    {
+        Assembly = assembly;
+        ResourceName = resourceName;
+    }
+
+    public override IConfigurationProvider Build(IConfigurationBuilder builder) =>
+        new EmbeddedResourceJsonConfigurationProvider(this);
+}
+
+public static class EmbeddedResourceConfigurationExtensions
+{
+    public static IConfigurationBuilder AddEmbeddedResourceJson(
+        this IConfigurationBuilder builder,
+        Assembly assembly,
+        string resourceName)
+    {
+        builder.Add(new EmbeddedResourceJsonConfigurationSource(assembly, resourceName));
+        return builder;
+    }
+}

tests/Gpulse.WCT.DataAnalyzer.Tests/CliTestHost.cs

@@ -1,3 +1,4 @@
+using System.Reflection;
 using Gpulse.WCT.DataAnalyzer.Core.Infrastructure.Extensions;
 using Gpulse.WCT.DataAnalyzer.Core.Infrastructure.LocalData;
 using Microsoft.Data.Sqlite;
@@ -56,7 +57,11 @@ public sealed class CliTestHost : IDisposable
         var releaseConnection = new SqliteConnection("Data Source=:memory:");
         await releaseConnection.OpenAsync();
 
+        // 从嵌入资源加载 appsettings.json，与 Program.Main 生产路径一致
         var configuration = new ConfigurationBuilder()
+            .AddEmbeddedResourceJson(
+                typeof(Program).Assembly,
+                "Gpulse.WCT.DataAnalyzer.appsettings.json")
             .AddInMemoryCollection(new Dictionary<string, string?>
             {
                 ["Database:Type"] = "sqlite",