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utility.go
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/
utility.go
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package main
import (
"io"
"os"
"path/filepath"
"runtime"
)
func Assert(err error) {
if err != nil {
panic(err)
}
}
func RunningDir() string {
_, currentFile, _, _ := runtime.Caller(0)
return filepath.Dir(currentFile)
}
func IsExist(path string) bool {
f, e := os.Open(path)
defer f.Close()
return os.IsExist(e)
}
func IsNotExist(path string) bool {
f, e := os.Open(path)
defer f.Close()
return os.IsNotExist(e)
}
func IsPermission(path string) bool {
f, e := os.Open(path)
defer f.Close()
return os.IsPermission(e)
}
func EnsureDirs(paths ...string) {
for _, path := range paths {
if IsNotExist(path) {
Assert(os.MkdirAll(path, os.ModePerm))
}
}
}
func ForceCopyFile(srcName, dstName string) (written int64, err error) {
src, err := os.Open(srcName)
Assert(err)
defer src.Close()
info, err := src.Stat()
Assert(err)
mode := info.Mode()
dst, err := os.Create(dstName)
Assert(err)
defer dst.Close()
Assert(os.Chmod(dstName, mode))
return io.Copy(dst, src)
}
func CopyDir(srcDir, dstDir string) error {
copypath := func(basepath, targpath, newBasepath string) string {
relpath, _ := filepath.Rel(basepath, targpath)
return filepath.Join(newBasepath, relpath)
}
walk := func(oriPath string, info os.FileInfo, err error) error {
newPath := copypath(srcDir, oriPath, dstDir)
if info.IsDir() {
return os.MkdirAll(newPath, info.Mode())
} else {
_, err := ForceCopyFile(oriPath, newPath)
return err
}
}
return filepath.Walk(srcDir, walk)
}