add vendor

vendor/github.com/astaxie/beego/utils/file.go

@@ -0,0 +1,101 @@
+// Copyright 2014 beego Author. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package utils
+
+import (
+	"bufio"
+	"errors"
+	"io"
+	"os"
+	"path/filepath"
+	"regexp"
+)
+
+// SelfPath gets compiled executable file absolute path
+func SelfPath() string {
+	path, _ := filepath.Abs(os.Args[0])
+	return path
+}
+
+// SelfDir gets compiled executable file directory
+func SelfDir() string {
+	return filepath.Dir(SelfPath())
+}
+
+// FileExists reports whether the named file or directory exists.
+func FileExists(name string) bool {
+	if _, err := os.Stat(name); err != nil {
+		if os.IsNotExist(err) {
+			return false
+		}
+	}
+	return true
+}
+
+// SearchFile Search a file in paths.
+// this is often used in search config file in /etc ~/
+func SearchFile(filename string, paths ...string) (fullpath string, err error) {
+	for _, path := range paths {
+		if fullpath = filepath.Join(path, filename); FileExists(fullpath) {
+			return
+		}
+	}
+	err = errors.New(fullpath + " not found in paths")
+	return
+}
+
+// GrepFile like command grep -E
+// for example: GrepFile(`^hello`, "hello.txt")
+// \n is striped while read
+func GrepFile(patten string, filename string) (lines []string, err error) {
+	re, err := regexp.Compile(patten)
+	if err != nil {
+		return
+	}
+
+	fd, err := os.Open(filename)
+	if err != nil {
+		return
+	}
+	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)
+		}
+	}
+	return lines, nil
+}