First try opening in active repository

This enables round tripping between `Copy link to clipboard` and `Open
from GitHub`.

Author: jcansdale

src/GitHub.App/Services/GitHubContextService.cs

@@ -219,7 +219,7 @@ public GitHubContext FindContextFromWindowTitle(string windowTitle)
             return null;
         }
 
-        public bool TryOpenFile(GitHubContext context, string repositoryDir)
+        public bool TryOpenFile(string repositoryDir, GitHubContext context)
         {
             var fileName = context.BlobName;
             if (fileName == null)

src/GitHub.VisualStudio/Commands/OpenFromUrlCommand.cs

@@ -23,6 +23,7 @@ public class OpenFromUrlCommand : VsCommand<string>, IOpenFromUrlCommand
         readonly Lazy<GitHubContextService> gitHubContextService;
         readonly Lazy<IRepositoryCloneService> repositoryCloneService;
         readonly Lazy<IPullRequestEditorService> pullRequestEditorService;
+        readonly Lazy<ITeamExplorerContext> teamExplorerContext;
         readonly Lazy<IGitHubToolWindowManager> gitHubToolWindowManager;
         readonly Lazy<DTE> dte;
         readonly IServiceProvider serviceProvider;
@@ -42,12 +43,14 @@ public OpenFromUrlCommand(
             Lazy<GitHubContextService> gitHubContextService,
             Lazy<IRepositoryCloneService> repositoryCloneService,
             Lazy<IPullRequestEditorService> pullRequestEditorService,
+            Lazy<ITeamExplorerContext> teamExplorerContext,
             [Import(typeof(SVsServiceProvider))] IServiceProvider serviceProvider) :
             base(CommandSet, CommandId)
         {
             this.gitHubContextService = gitHubContextService;
             this.repositoryCloneService = repositoryCloneService;
             this.pullRequestEditorService = pullRequestEditorService;
+            this.teamExplorerContext = teamExplorerContext;
             this.serviceProvider = serviceProvider;
             dte = new Lazy<DTE>(() => (DTE)serviceProvider.GetService(typeof(DTE)));
             gitHubToolWindowManager = new Lazy<IGitHubToolWindowManager>(
@@ -72,6 +75,16 @@ public override async Task Execute(string url)
                 return;
             }
 
+            var activeDir = teamExplorerContext.Value.ActiveRepository?.LocalPath;
+            if (activeDir != null)
+            {
+                // Try opening file in current context
+                if (gitHubContextService.Value.TryOpenFile(activeDir, context))
+                {
+                    return;
+                }
+            }
+
             // Keep repos in unique dir while testing
             var defaultSubPath = "GitHubCache";
 
@@ -125,7 +138,7 @@ public override async Task Execute(string url)
             }
 
             await TryOpenPullRequest(context);
-            gitHubContextService.Value.TryOpenFile(context, repositoryDir);
+            gitHubContextService.Value.TryOpenFile(repositoryDir, context);
         }
 
         VSConstants.MessageBoxResult ShowInfoMessage(string message)