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fs.go
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fs.go
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// Copyright 2022 Namespace Labs Inc; All rights reserved.
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
package llbutil
import (
"context"
"encoding/json"
"io/fs"
"path/filepath"
"github.com/moby/buildkit/client/llb"
"namespacelabs.dev/foundation/internal/bytestream"
"namespacelabs.dev/foundation/internal/fnfs"
)
// Reforge emits a series of File() operations that will produce the same contents as in the provided `fsys`.
func Reforge(ctx context.Context, fsys fs.FS, base llb.State, target string) (llb.State, error) {
if err := fnfs.VisitFiles(ctx, fsys, func(path string, blob bytestream.ByteStream, de fs.DirEntry) error {
info, err := de.Info()
if err != nil {
return err
}
contents, err := bytestream.ReadAll(blob)
if err != nil {
return err
}
base = base.File(llb.Mkfile(filepath.Join(target, path), info.Mode(), contents))
return nil
}); err != nil {
return llb.State{}, err
}
return base, nil
}
func AddFile(base llb.State, path string, m fs.FileMode, content []byte) llb.State {
return base.
File(llb.Mkdir(filepath.Dir(path), 0755, llb.WithParents(true))).
File(llb.Mkfile(path, m, content))
}
func AddSerializedJsonAsFile(base llb.State, path string, content any) (llb.State, error) {
serialized, err := json.MarshalIndent(content, "", " ")
if err != nil {
return llb.State{}, err
}
return AddFile(base, path, 0644, serialized), nil
}