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[Golang] Find Last Modified File With Specific Name Prefix
source link: http://siongui.github.io/2018/04/18/go-find-last-modified-file-starts-with/
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[Golang] Find Last Modified File With Specific Name Prefix
April 18, 2018
This post shows you how to find the last modified file, name of which starts with specific prefx in Go.
We use ioutil.ReadDir to read files in the directory, but not in sub-directories. If you need to read also sub-directories, Use filepath.Walk.
package main
import (
"io/ioutil"
"os"
"strings"
)
func findLastFileStartsWith(dir, prefix string) (lastFile os.FileInfo, err error) {
files, err := ioutil.ReadDir(dir)
if err != nil {
return
}
for _, file := range files {
if !file.Mode().IsRegular() {
continue
}
if strings.HasPrefix(file.Name(), prefix) {
if lastFile == nil {
lastFile = file
} else {
if lastFile.ModTime().Before(file.ModTime()) {
lastFile = file
}
}
}
}
if lastFile == nil {
err = os.ErrNotExist
return
}
return
}
func main() {
file, err := findLastFileStartsWith(".", "myprefix")
if err != nil {
panic(err)
}
println(file.Name())
}
Tested on: Ubuntu Linux 17.10, Go 1.10.1
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