From 3f4d750dc47f8288fb40901f33e498befe1da8d1 Mon Sep 17 00:00:00 2001
From: astaxie <xiemengjun@gmail.com>
Date: Tue, 20 May 2014 14:32:06 +0800
Subject: [PATCH] utils: improve the file grep

---
 utils/file.go | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/utils/file.go b/utils/file.go
index 0f08045b..5246d88c 100644
--- a/utils/file.go
+++ b/utils/file.go
@@ -64,24 +64,30 @@ func GrepFile(patten string, filename string) (lines []string, err error) {
 	lines = make([]string, 0)
 	reader := bufio.NewReader(fd)
 	prefix := ""
+	isLongLine := false
 	for {
 		byteLine, isPrefix, er := reader.ReadLine()
 		if er != nil && er != io.EOF {
 			return nil, er
 		}
+		if er == io.EOF {
+			break
+		}
 		line := string(byteLine)
 		if isPrefix {
 			prefix += line
 			continue
+		} else {
+			isLongLine = true
 		}
 
 		line = prefix + line
+		if isLongLine {
+			prefix = ""
+		}
 		if re.MatchString(line) {
 			lines = append(lines, line)
 		}
-		if er == io.EOF {
-			break
-		}
 	}
 	return lines, nil
 }