diff --git a/vendor/github.com/jessevdk/go-flags/closest.go b/vendor/github.com/jessevdk/go-flags/closest.go
new file mode 100644
index 0000000..3b51875
--- /dev/null
+++ b/vendor/github.com/jessevdk/go-flags/closest.go
@@ -0,0 +1,59 @@
+package flags
+
+func levenshtein(s string, t string) int {
+	if len(s) == 0 {
+		return len(t)
+	}
+
+	if len(t) == 0 {
+		return len(s)
+	}
+
+	dists := make([][]int, len(s)+1)
+	for i := range dists {
+		dists[i] = make([]int, len(t)+1)
+		dists[i][0] = i
+	}
+
+	for j := range t {
+		dists[0][j] = j
+	}
+
+	for i, sc := range s {
+		for j, tc := range t {
+			if sc == tc {
+				dists[i+1][j+1] = dists[i][j]
+			} else {
+				dists[i+1][j+1] = dists[i][j] + 1
+				if dists[i+1][j] < dists[i+1][j+1] {
+					dists[i+1][j+1] = dists[i+1][j] + 1
+				}
+				if dists[i][j+1] < dists[i+1][j+1] {
+					dists[i+1][j+1] = dists[i][j+1] + 1
+				}
+			}
+		}
+	}
+
+	return dists[len(s)][len(t)]
+}
+
+func closestChoice(cmd string, choices []string) (string, int) {
+	if len(choices) == 0 {
+		return "", 0
+	}
+
+	mincmd := -1
+	mindist := -1
+
+	for i, c := range choices {
+		l := levenshtein(cmd, c)
+
+		if mincmd < 0 || l < mindist {
+			mindist = l
+			mincmd = i
+		}
+	}
+
+	return choices[mincmd], mindist
+}