Recursive directory lookup

When only one directory matches the result, search recursively
whithin this directory for files.

1 files changed, 28 insertions, 2 deletions

diff --git a/predict_files.go b/predict_files.go
index 8ad5368..fe70c97 100644
--- a/predict_files.go
+++ b/predict_files.go
@@ -25,9 +25,35 @@ func PredictFiles(pattern string) Predictor {
 }
 
 func files(pattern string, allowFiles bool) PredictFunc {
+
+	// search for files according to arguments,
+	// if only one directory has matched the result, search recursively into
+	// this directory to give more results.
 	return func(a Args) (prediction []string) {
-		prediction = predictFiles(a.Last, pattern, allowFiles)
-		return
+		last := a.Last
+		for {
+
+			prediction = predictFiles(last, pattern, allowFiles)
+
+			// if the number of prediction is not 1, we either have many results or
+			// have no results, so we return it.
+			if len(prediction) != 1 {
+				return
+			}
+
+			// if the result is only one item, we might want to recursively check
+			// for more accurate results.
+			if prediction[0] == last { // avoid loop forever
+				return
+			}
+
+			// only try deeper, if the one item is a directory
+			if stat, err := os.Stat(prediction[0]); err != nil || !stat.IsDir() {
+				return
+			}
+
+			last = prediction[0]
+		}
 	}
 }