Fallback to main for remote tracking (#81)

Author: Mpdreamz

src/Elastic.Markdown/IO/GitConfiguration.cs

@@ -5,17 +5,15 @@
 using System.IO.Abstractions;
 using System.Text.Json.Serialization;
 using IniParser;
+using IniParser.Model;
 
 namespace Elastic.Markdown.IO;
 
 public record GitConfiguration
 {
-	[JsonPropertyName("branch")]
-	public required string Branch { get; init; }
-	[JsonPropertyName("remote")]
-	public required string Remote { get; init; }
-	[JsonPropertyName("ref")]
-	public required string Ref { get; init; }
+	[JsonPropertyName("branch")] public required string Branch { get; init; }
+	[JsonPropertyName("remote")] public required string Remote { get; init; }
+	[JsonPropertyName("ref")] public required string Ref { get; init; }
 
 	// manual read because libgit2sharp is not yet AOT ready
 	public static GitConfiguration Create(IFileSystem fileSystem)
@@ -24,12 +22,7 @@ public static GitConfiguration Create(IFileSystem fileSystem)
 		if (fileSystem is not FileSystem)
 		{
 			var fakeRef = Guid.NewGuid().ToString().Substring(0, 16);
-			return new GitConfiguration
-			{
-				Branch = $"test-{fakeRef}",
-				Remote = "elastic/docs-builder",
-				Ref = fakeRef,
-			};
+			return new GitConfiguration { Branch = $"test-{fakeRef}", Remote = "elastic/docs-builder", Ref = fakeRef, };
 		}
 
 		var gitConfig = Git(".git/config");
@@ -44,19 +37,25 @@ public static GitConfiguration Create(IFileSystem fileSystem)
 		using var stream = gitConfig.OpenRead();
 		using var streamReader = new StreamReader(stream);
 		var config = ini.ReadData(streamReader);
-		var remoteName = config[$"branch \"{branch}\""]["remote"];
-		var remote = config[$"remote \"{remoteName}\""]["url"];
+		var remote = BranchTrackingRemote(branch, config);
+		if (string.IsNullOrEmpty(remote))
+			remote = BranchTrackingRemote("main", config);
+		if (string.IsNullOrEmpty(remote))
+			remote = BranchTrackingRemote("master", config);
 
-		return new GitConfiguration
-		{
-			Ref = gitRef,
-			Branch = branch,
-			Remote = remote
-		};
+
+		return new GitConfiguration { Ref = gitRef, Branch = branch, Remote = remote };
 
 		IFileInfo Git(string path) => fileSystem.FileInfo.New(Path.Combine(Paths.Root.FullName, path));
 
 		string Read(string path) =>
 			fileSystem.File.ReadAllText(Git(path).FullName).Trim(Environment.NewLine.ToCharArray());
+
+		string BranchTrackingRemote(string b, IniData c)
+		{
+			var remoteName = c[$"branch \"{b}\""]["remote"];
+			remote = c[$"remote \"{remoteName}\""]["url"];
+			return remote;
+		}
 	}
 }