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package staticfs
import (
"bytes"
"context"
"io"
"io/fs"
"os"
"sort"
"strings"
"github.com/tonistiigi/fsutil"
"github.com/tonistiigi/fsutil/types"
)
type File struct {
Stat types.Stat
Data []byte
}
type FS struct {
files map[string]File
}
var _ fsutil.FS = &FS{}
func NewFS() *FS {
return &FS{
files: map[string]File{},
}
}
func (fs *FS) Add(p string, stat types.Stat, data []byte) {
p = strings.TrimPrefix(p, "/")
stat.Size_ = int64(len(data))
if stat.Mode == 0 {
stat.Mode = 0644
}
stat.Path = p
fs.files[p] = File{
Stat: stat,
Data: data,
}
}
func (fs *FS) Walk(ctx context.Context, target string, fn fs.WalkDirFunc) error {
target = strings.TrimPrefix(target, "/")
keys := make([]string, 0, len(fs.files))
for k := range fs.files {
if !strings.HasPrefix(k, target) {
continue
}
keys = append(keys, convertPathToKey(k))
}
sort.Strings(keys)
for _, k := range keys {
p := convertKeyToPath(k)
st := fs.files[p].Stat
if err := fn(p, &fsutil.DirEntryInfo{Stat: &st}, nil); err != nil {
return err
}
}
return nil
}
func (fs *FS) Open(p string) (io.ReadCloser, error) {
if f, ok := fs.files[p]; ok {
return io.NopCloser(bytes.NewReader(f.Data)), nil
}
return nil, os.ErrNotExist
}
func convertPathToKey(p string) string {
return strings.ReplaceAll(p, "/", "\x00")
}
func convertKeyToPath(p string) string {
return strings.ReplaceAll(p, "\x00", "/")
}
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