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package fs
import (
"io"
"os"
"strings"
"time"
)
func pathJoin(parts ...string) string {
return strings.Join(parts, string(os.PathSeparator))
}
func OpenOSFile(path string) (osFile, error) {
fi, err := os.Lstat(path)
if err != nil {
return osFile{}, err
}
return osFile{
fullpath: path,
fi: fi,
}, nil
}
type osFile struct {
fullpath string
fi os.FileInfo
}
func (f osFile) Type() FileType {
m := f.fi.Mode()
if m.IsDir() {
return FDir
}
if m.IsRegular() {
return FFile
}
if m&os.ModeSymlink != 0 {
return FSymlink
}
return "unknown"
}
func (f osFile) Name() string {
return f.fi.Name()
}
func (f osFile) Executable() bool {
return f.fi.Mode()&0100 != 0 // x bit set for user?
}
func (f osFile) ModTime() time.Time {
return f.fi.ModTime()
}
func (f osFile) Delete() error {
return os.RemoveAll(f.fullpath)
}
func (f osFile) Open() (io.ReadCloser, error) {
fh, err := os.Open(f.fullpath)
if err != nil {
return nil, err
}
return fh, nil
}
func (f osFile) OpenWritable() (io.WriteCloser, error) {
fh, err := os.Create(f.fullpath)
if err != nil {
return nil, err
}
return fh, nil
}
func (f osFile) Readdir() (list []File, err error) {
fh, err := os.Open(f.fullpath)
if err != nil {
return
}
defer fh.Close()
infos, err := fh.Readdir(-1)
if err != nil {
return
}
for _, fi := range infos {
if fi.Name() == "." || fi.Name() == ".." {
continue
}
list = append(list, osFile{
fullpath: pathJoin(f.fullpath, fi.Name()),
fi: fi,
})
}
return
}
func (f osFile) GetChild(name string) (File, error) {
path := pathJoin(f.fullpath, name)
fi, err := os.Lstat(path)
if err != nil {
return nil, err
}
return osFile{path, fi}, nil
}
func perms(executable bool) os.FileMode {
if executable {
return 0755
} else {
return 0644
}
}
func (f osFile) CreateChildFile(name string, exec bool) (RegularFile, error) {
p := pathJoin(f.fullpath, name)
fh, err := os.OpenFile(p, os.O_RDWR|os.O_CREATE, perms(exec))
if err != nil {
return nil, err
}
fh.Close()
return OpenOSFile(p)
}
func (f osFile) CreateChildDir(name string) (Dir, error) {
p := pathJoin(f.fullpath, name)
if err := os.Mkdir(p, perms(true)); err != nil {
return nil, err
}
return OpenOSFile(p)
}
func (f osFile) CreateChildSymlink(name string, target string) (Symlink, error) {
p := pathJoin(f.fullpath, name)
err := os.Symlink(target, p)
if err != nil {
return nil, err
}
return OpenOSFile(p)
}
func (f osFile) RenameChild(oldname, newname string) error {
return os.Rename(pathJoin(f.fullpath, oldname), pathJoin(f.fullpath, newname))
}
func (f osFile) Readlink() (string, error) {
return os.Readlink(f.fullpath)
}
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