feat: add --memberLayout argument to metadata command (dotnet#9244)

feat: add --memberLayout arg to metadata command

Co-authored-by: Yufei Huang <yufeih@users.noreply.github.com>

Author: yufeih

.github/workflows/ci.yml

@@ -44,8 +44,9 @@ jobs:
     - run: dotnet run -c Release --no-build -f net8.0 --project src/docfx -- docs/docfx.json
 
     - run: dotnet run -c Release --no-build -f net8.0 --project src/docfx -- metadata samples/seed/docfx.json
+    - run: dotnet run -c Release --no-build -f net8.0 --project src/docfx -- metadata samples/seed/docfx.json --outputFormat markdown --output samples/seed/md
+    - run: dotnet run -c Release --no-build -f net8.0 --project src/docfx -- metadata samples/seed/docfx.json --outputFormat markdown --output samples/seed/md2 --namespaceLayout nested --memberLayout separatePages
     - run: dotnet run -c Release --no-build -f net8.0 --project src/docfx -- build samples/seed/docfx.json --output docs/_site/seed
-    - run: dotnet run -c Release --no-build -f net8.0 --project src/docfx -- metadata samples/seed/docfx.json --outputFormat markdown --output docs/_site/seed/md
 
     - uses: actions/upload-artifact@v3
       if: matrix.os == 'ubuntu-latest'

src/docfx/Models/MetadataCommand.cs

@@ -29,6 +29,7 @@ private static void MergeOptionsToConfig(MetadataCommandOptions options, Metadat
             item.DisableGitFeatures |= options.DisableGitFeatures;
             item.DisableDefaultFilter |= options.DisableDefaultFilter;
             item.NamespaceLayout = options.NamespaceLayout ?? item.NamespaceLayout;
+            item.MemberLayout = options.MemberLayout ?? item.MemberLayout;
             item.OutputFormat = options.OutputFormat ?? item.OutputFormat;
 
             if (!string.IsNullOrEmpty(options.FilterConfigFile))

src/docfx/Models/MetadataCommandOptions.cs

@@ -48,4 +48,8 @@ internal class MetadataCommandOptions : LogOptions
     [Description("Determines the namespace layout in table of contents.")]
     [CommandOption("--namespaceLayout")]
     public NamespaceLayout? NamespaceLayout { get; set; }
+
+    [Description("Determines the member page layout.")]
+    [CommandOption("--memberLayout")]
+    public MemberLayout? MemberLayout { get; set; }
 }