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// Copyright (c) 2018, Sylabs Inc. All rights reserved.
// This software is licensed under a 3-clause BSD license. Please consult the
// LICENSE.md file distributed with the sources of this project regarding your
// rights to use or distribute this software.
package sources
import (
"context"
"fmt"
"github.com/sylabs/singularity/v4/internal/pkg/image/unpacker"
"github.com/sylabs/singularity/v4/pkg/build/types"
"github.com/sylabs/singularity/v4/pkg/image"
)
// SquashfsPacker holds the locations of where to pack from and to, as well as image offset info
type SquashfsPacker struct {
srcfile string
b *types.Bundle
img *image.Image
}
// Pack puts relevant objects in a Bundle!
func (p *SquashfsPacker) Pack(context.Context) (*types.Bundle, error) {
// create a reader for rootfs partition
reader, err := image.NewPartitionReader(p.img, "", 0)
if err != nil {
return nil, fmt.Errorf("could not extract root filesystem: %s", err)
}
s := unpacker.NewSquashfs()
// extract root filesystem
if err := s.ExtractAll(reader, p.b.RootfsPath); err != nil {
return nil, fmt.Errorf("root filesystem extraction failed: %s", err)
}
return p.b, nil
}
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