Make RepositoryStatus expose an indexer

Author: nulltoken

LibGit2Sharp.Tests/StatusFixture.cs

@@ -37,8 +37,7 @@ public void CanRetrieveTheStatusOfTheWholeWorkingDirectory()
 
                 RepositoryStatus status = repo.Index.RetrieveStatus();
 
-                IndexEntry indexEntry = repo.Index[file];
-                Assert.Equal(FileStatus.Staged, indexEntry.State);
+                Assert.Equal(FileStatus.Staged, status[file]);
 
                 Assert.NotNull(status);
                 Assert.Equal(6, status.Count());
@@ -54,9 +53,10 @@ public void CanRetrieveTheStatusOfTheWholeWorkingDirectory()
                 File.AppendAllText(Path.Combine(repo.Info.WorkingDirectory, file),
                                    "Tclem's favorite commit message: boom");
 
-                Assert.Equal(FileStatus.Staged | FileStatus.Modified, indexEntry.State);
+                Assert.Equal(FileStatus.Staged | FileStatus.Modified, repo.Index.RetrieveStatus(file));
 
                 RepositoryStatus status2 = repo.Index.RetrieveStatus();
+                Assert.Equal(FileStatus.Staged | FileStatus.Modified, status2[file]);
 
                 Assert.NotNull(status2);
                 Assert.Equal(6, status2.Count());

LibGit2Sharp/RepositoryStatus.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Collections;
 using System.Collections.Generic;
+using System.Diagnostics;
 using System.Linq;
 using LibGit2Sharp.Core;
 
@@ -68,6 +69,28 @@ private StatusEntry StateChanged(IntPtr filePathPtr, uint state)
             return new StatusEntry(filePath.Native, gitStatus);
         }
 
+        /// <summary>
+        ///   Gets the <see cref = "FileStatus" /> for the specified relative path.
+        /// </summary>
+        public virtual FileStatus this[string path]
+        {
+            get
+            {
+                Ensure.ArgumentNotNullOrEmptyString(path, "path");
+
+                var entries = statusEntries.Where(e => string.Equals(e.FilePath, path, StringComparison.Ordinal)).ToList();
+
+                Debug.Assert(!(entries.Count > 1));
+
+                if (entries.Count == 0)
+                {
+                    return FileStatus.Nonexistent;
+                }
+
+                return entries.Single().State;
+            }
+        }
+
         /// <summary>
         ///   Returns an enumerator that iterates through the collection.
         /// </summary>