mirror of
https://github.com/astaxie/beego.git
synced 2024-11-18 10:40:55 +00:00
102 lines
2.2 KiB
Go
102 lines
2.2 KiB
Go
// 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
|
|
}
|
|
|
|
// 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
|
|
}
|
|
|
|
// 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
|
|
}
|