compose/pkg/watch/temp.go

74 lines
1.6 KiB
Go

package watch
import (
"io/ioutil"
"os"
"path/filepath"
)
// TempDir holds a temp directory and allows easy access to new temp directories.
type TempDir struct {
dir string
}
// NewDir creates a new TempDir in the default location (typically $TMPDIR)
func NewDir(prefix string) (*TempDir, error) {
return NewDirAtRoot("", prefix)
}
// NewDir creates a new TempDir at the given root.
func NewDirAtRoot(root, prefix string) (*TempDir, error) {
tmpDir, err := ioutil.TempDir(root, prefix)
if err != nil {
return nil, err
}
realTmpDir, err := filepath.EvalSymlinks(tmpDir)
if err != nil {
return nil, err
}
return &TempDir{dir: realTmpDir}, nil
}
// NewDirAtSlashTmp creates a new TempDir at /tmp
func NewDirAtSlashTmp(prefix string) (*TempDir, error) {
fullyResolvedPath, err := filepath.EvalSymlinks("/tmp")
if err != nil {
return nil, err
}
return NewDirAtRoot(fullyResolvedPath, prefix)
}
// d.NewDir creates a new TempDir under d
func (d *TempDir) NewDir(prefix string) (*TempDir, error) {
d2, err := ioutil.TempDir(d.dir, prefix)
if err != nil {
return nil, err
}
return &TempDir{d2}, nil
}
func (d *TempDir) NewDeterministicDir(name string) (*TempDir, error) {
d2 := filepath.Join(d.dir, name)
err := os.Mkdir(d2, 0700)
if os.IsExist(err) {
return nil, err
} else if err != nil {
return nil, err
}
return &TempDir{d2}, nil
}
func (d *TempDir) TearDown() error {
return os.RemoveAll(d.dir)
}
func (d *TempDir) Path() string {
return d.dir
}
// Possible extensions:
// temp file
// named directories or files (e.g., we know we want one git repo for our object, but it should be temporary)