forked from toolshed/abra
113 lines
2.8 KiB
Go
113 lines
2.8 KiB
Go
//go:build !js
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// +build !js
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package osfs
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import (
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"os"
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"path/filepath"
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"github.com/go-git/go-billy/v5"
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"github.com/go-git/go-billy/v5/helper/chroot"
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)
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// ChrootOS is a legacy filesystem based on a "soft chroot" of the os filesystem.
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// Although this is still the default os filesystem, consider using BoundOS instead.
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//
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// Behaviours of note:
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// 1. A "soft chroot" translates the base dir to "/" for the purposes of the
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// fs abstraction.
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// 2. Symlinks targets may be modified to be kept within the chroot bounds.
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// 3. Some file modes does not pass-through the fs abstraction.
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// 4. The combination of 1 and 2 may cause go-git to think that a Git repository
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// is dirty, when in fact it isn't.
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type ChrootOS struct{}
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func newChrootOS(baseDir string) billy.Filesystem {
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return chroot.New(&ChrootOS{}, baseDir)
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}
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func (fs *ChrootOS) Create(filename string) (billy.File, error) {
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return fs.OpenFile(filename, os.O_RDWR|os.O_CREATE|os.O_TRUNC, defaultCreateMode)
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}
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func (fs *ChrootOS) OpenFile(filename string, flag int, perm os.FileMode) (billy.File, error) {
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return openFile(filename, flag, perm, fs.createDir)
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}
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func (fs *ChrootOS) createDir(fullpath string) error {
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dir := filepath.Dir(fullpath)
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if dir != "." {
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if err := os.MkdirAll(dir, defaultDirectoryMode); err != nil {
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return err
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}
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}
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return nil
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}
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func (fs *ChrootOS) ReadDir(dir string) ([]os.FileInfo, error) {
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return readDir(dir)
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}
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func (fs *ChrootOS) Rename(from, to string) error {
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if err := fs.createDir(to); err != nil {
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return err
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}
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return rename(from, to)
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}
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func (fs *ChrootOS) MkdirAll(path string, perm os.FileMode) error {
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return os.MkdirAll(path, defaultDirectoryMode)
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}
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func (fs *ChrootOS) Open(filename string) (billy.File, error) {
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return fs.OpenFile(filename, os.O_RDONLY, 0)
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}
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func (fs *ChrootOS) Stat(filename string) (os.FileInfo, error) {
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return os.Stat(filename)
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}
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func (fs *ChrootOS) Remove(filename string) error {
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return os.Remove(filename)
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}
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func (fs *ChrootOS) TempFile(dir, prefix string) (billy.File, error) {
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if err := fs.createDir(dir + string(os.PathSeparator)); err != nil {
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return nil, err
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}
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return tempFile(dir, prefix)
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}
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func (fs *ChrootOS) Join(elem ...string) string {
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return filepath.Join(elem...)
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}
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func (fs *ChrootOS) RemoveAll(path string) error {
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return os.RemoveAll(filepath.Clean(path))
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}
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func (fs *ChrootOS) Lstat(filename string) (os.FileInfo, error) {
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return os.Lstat(filepath.Clean(filename))
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}
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func (fs *ChrootOS) Symlink(target, link string) error {
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if err := fs.createDir(link); err != nil {
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return err
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}
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return os.Symlink(target, link)
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}
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func (fs *ChrootOS) Readlink(link string) (string, error) {
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return os.Readlink(link)
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}
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// Capabilities implements the Capable interface.
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func (fs *ChrootOS) Capabilities() billy.Capability {
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return billy.DefaultCapabilities
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}
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