Introduce StatusShowOption (for git_status_show_t)

Author: Edward Thomson

LibGit2Sharp.Tests/StatusFixture.cs

@@ -20,6 +20,42 @@ public void CanRetrieveTheStatusOfAFile()
             }
         }
 
+        [Theory]
+        [InlineData(StatusShowOption.IndexAndWorkdir, FileStatus.Untracked)]
+        [InlineData(StatusShowOption.WorkdirOnly, FileStatus.Untracked)]
+        [InlineData(StatusShowOption.IndexOnly, FileStatus.Nonexistent)]
+        public void CanLimitStatusToWorkdirOnly(StatusShowOption show, FileStatus expected)
+        {
+            var clone = CloneStandardTestRepo();
+
+            using (var repo = new Repository(clone))
+            {
+                Touch(repo.Info.WorkingDirectory, "file.txt", "content");
+
+                RepositoryStatus status = repo.Index.RetrieveStatus(new StatusOptions() { Show = show });
+                Assert.Equal(expected, status["file.txt"].State);
+            }
+        }
+
+        [Theory]
+        [InlineData(StatusShowOption.IndexAndWorkdir, FileStatus.Added)]
+        [InlineData(StatusShowOption.WorkdirOnly, FileStatus.Nonexistent)]
+        [InlineData(StatusShowOption.IndexOnly, FileStatus.Added)]
+        public void CanLimitStatusToIndexOnly(StatusShowOption show, FileStatus expected)
+        {
+            var clone = CloneStandardTestRepo();
+
+            using (var repo = new Repository(clone))
+            {
+                Touch(repo.Info.WorkingDirectory, "file.txt", "content");
+                repo.Index.Stage("file.txt");
+
+                RepositoryStatus status = repo.Index.RetrieveStatus(new StatusOptions() { Show = show });
+                Assert.Equal(expected, status["file.txt"].State);
+            }
+        }
+
+
         [Theory]
         [InlineData("file")]
         [InlineData("file.txt")]

LibGit2Sharp/RepositoryStatus.cs

@@ -61,7 +61,7 @@ internal RepositoryStatus(Repository repo, StatusOptions options)
             var gitOptions = new GitStatusOptions
             {
                 Version = 1,
-                Show = GitStatusShow.IndexAndWorkdir,
+                Show = (GitStatusShow)options.Show,
                 Flags =
                     GitStatusOptionFlags.IncludeIgnored |
                     GitStatusOptionFlags.IncludeUntracked |

LibGit2Sharp/StatusOptions.cs

@@ -5,16 +5,47 @@
 
 namespace LibGit2Sharp
 {
+    /// <summary>
+    /// Flags controlling what files are reported by status.
+    /// </summary>
+    public enum StatusShowOption
+    {
+        /// <summary>
+        /// Both the index and working directory are examined for changes
+        /// </summary>
+        IndexAndWorkdir = 0,
+
+        /// <summary>
+        /// Only the index is examined for changes
+        /// </summary>
+        IndexOnly = 1,
+
+        /// <summary>
+        /// Only the working directory is examined for changes
+        /// </summary>
+        WorkdirOnly = 2
+    }
+
     /// <summary>
     /// Options controlling the status behavior.
     /// </summary>
     public class StatusOptions
     {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="StatusOptions"/> class.
+        /// </summary>
         public StatusOptions()
         {
+            Show = StatusShowOption.IndexAndWorkdir;
+
             DetectRenamesInIndex = true;
         }
 
+        /// <summary>
+        /// Which files should be scanned and returned
+        /// </summary>
+        public virtual StatusShowOption Show { get; set; }
+
         /// <summary>
         /// Examine the staged changes for renames.
         /// </summary>