add StatusFile function

status.go

@@ -20,7 +20,7 @@ const (
 	StatusIndexRenamed           = C.GIT_STATUS_INDEX_RENAMED
 	StatusIndexTypeChange        = C.GIT_STATUS_INDEX_TYPECHANGE
 	StatusWtNew                  = C.GIT_STATUS_WT_NEW
-	StatusWtModified             = C.GIT_STATUS_WT_NEW
+	StatusWtModified             = C.GIT_STATUS_WT_MODIFIED
 	StatusWtDeleted              = C.GIT_STATUS_WT_DELETED
 	StatusWtTypeChange           = C.GIT_STATUS_WT_TYPECHANGE
 	StatusWtRenamed              = C.GIT_STATUS_WT_RENAMED
@@ -157,3 +157,14 @@ func (v *Repository) StatusList(opts *StatusOptions) (*StatusList, error) {
 	}
 	return newStatusListFromC(ptr), nil
 }
+
+
+func (v *Repository) StatusFile(path string) (Status, error) {
+	var statusFlags C.uint
+	cPath := C.CString(path)
+	ret := C.git_status_file(&statusFlags, v.ptr, cPath)
+	if ret < 0 {
+		return 0, MakeGitError(ret)
+	}
+	return Status(statusFlags), nil
+}

status_test.go

@@ -7,12 +7,28 @@ import (
 	"testing"
 )
 
+func TestStatusFile(t *testing.T) {
+	repo := createTestRepo(t)
+	defer repo.Free()
+	defer os.RemoveAll(repo.Workdir())
+
+	err := ioutil.WriteFile(path.Join(path.Dir(repo.Workdir()), "hello.txt"), []byte("Hello, World"), 0644)
+	checkFatal(t, err)
+
+	status, err := repo.StatusFile("hello.txt")
+	checkFatal(t, err)
+
+	if status != StatusWtNew {
+		t.Fatal("Incorrect status flags: ", status)
+	}
+}
+
 func TestEntryCount(t *testing.T) {
 	repo := createTestRepo(t)
 	defer repo.Free()
 	defer os.RemoveAll(repo.Workdir())
 
-	err := ioutil.WriteFile(path.Join(path.Dir(repo.Path()), "hello.txt"), []byte("Hello, World"), 0644)
+	err := ioutil.WriteFile(path.Join(path.Dir(repo.Workdir()), "hello.txt"), []byte("Hello, World"), 0644)
 	checkFatal(t, err)
 
 	statusList, err := repo.StatusList(nil)