From 73abf84f51e71ead1d327fc0fb53dff15a4367c7 Mon Sep 17 00:00:00 2001
From: Philippe Miossec <pmiossec@gmail.com>
Date: Thu, 10 Jul 2014 14:42:35 +0200
Subject: [PATCH] Add a parameter to only return the sha of a commit given a
 changeset id

---
 GitTfs/Commands/Checkout.cs | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/GitTfs/Commands/Checkout.cs b/GitTfs/Commands/Checkout.cs
index 5a6e88ed..ae9471a0 100644
--- a/GitTfs/Commands/Checkout.cs
+++ b/GitTfs/Commands/Checkout.cs
@@ -29,11 +29,14 @@ namespace Sep.Git.Tfs.Commands
                 return new OptionSet
                 {
                     { "b|branch=", "Name of the branch to create", v => BranchName = v },
+                    { "n|dry-run", "Don't checkout the commit, just return commit sha", v => ReturnShaOnly = v != null },
                 };
             }
         }
 
+
         protected string BranchName { get; set; }
+        protected bool ReturnShaOnly { get; set; }
 
         public int Run(string id)
         {
@@ -43,6 +46,11 @@ namespace Sep.Git.Tfs.Commands
             var sha = _globals.Repository.FindCommitHashByChangesetId(changesetId);
             if (string.IsNullOrEmpty(sha))
                 throw new GitTfsException("error: commit not found for this changeset id...");
+            if (ReturnShaOnly)
+            {
+                _stdout.Write(sha);
+                return GitTfsExitCodes.OK;
+            }
             string commitishToCheckout = sha;
             if (!string.IsNullOrEmpty(BranchName))
             {