go-asink/util/util.go

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package util
import (
"io"
"io/ioutil"
"os"
"path"
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"syscall"
)
func EnsureDirExists(dir string) error {
_, err := os.Lstat(dir)
if err != nil {
var fi os.FileInfo
curDir := dir
for dir != "" && err != nil {
curDir = path.Dir(curDir)
fi, err = os.Lstat(curDir)
}
if err != nil {
return err
}
err = os.MkdirAll(dir, fi.Mode().Perm())
if err != nil {
return err
}
}
return nil
}
func FileExistsAndHasPermissions(file string, mode os.FileMode) bool {
info, err := os.Stat(file)
if err != nil {
return false
}
return info.Mode().Perm() == mode
}
//TODO maybe this shouldn't fail silently?
func RecursiveRemoveEmptyDirs(dir string) {
var err error = nil
curDir := dir
for err == nil {
err = os.Remove(curDir)
curDir = path.Dir(curDir)
}
}
func CopyReaderToTmp(src io.Reader, tmpdir string) (string, error) {
outfile, err := ioutil.TempFile(tmpdir, "asink")
if err != nil {
return "", err
}
defer outfile.Close()
_, err = io.Copy(outfile, src)
if err != nil {
return "", err
}
return outfile.Name(), nil
}
func CopyToTmp(src string, tmpdir string) (string, error) {
infile, err := os.Open(src)
if err != nil {
return "", err
}
defer infile.Close()
return CopyReaderToTmp(infile, tmpdir)
}
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func ErrorFileNotFound(err error) bool {
if e, ok := err.(*os.PathError); ok && e.Err == syscall.ENOENT {
return true
}
return false
}