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// Copyright (c) 2018-2022, 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"
"path/filepath"
"strings"
"github.com/sylabs/singularity/v4/pkg/build/types"
"github.com/sylabs/singularity/v4/pkg/image"
"github.com/sylabs/singularity/v4/pkg/sylog"
)
// LocalConveyor only needs to hold the conveyor to have the needed data to pack
type LocalConveyor struct {
src string
}
// LocalPacker ...
type LocalPacker interface {
Pack(context.Context) (*types.Bundle, error)
}
// LocalConveyorPacker only needs to hold the conveyor to have the needed data to pack
type LocalConveyorPacker struct {
LocalConveyor
LocalPacker
}
// GetLocalPacker ...
func GetLocalPacker(ctx context.Context, src string, b *types.Bundle) (LocalPacker, error) {
imageObject, err := image.Init(src, false)
if err != nil {
return nil, err
}
switch imageObject.Type {
case image.SIF:
sylog.Debugf("Packing from SIF")
// Retrieve list of required fingerprints from definition, if any
fps := []string{}
if fpHdr, ok := b.Recipe.Header["fingerprints"]; ok {
// Remove trailing comment
fpHdr = strings.Split(fpHdr, "#")[0]
fpHdr = strings.TrimSpace(fpHdr)
if fpHdr != "" {
fps = strings.Split(fpHdr, ",")
for i, v := range fps {
fps[i] = strings.TrimSpace(v)
}
}
}
// Check if the SIF matches the `fingerprints:` specified in the build, if there are any
if len(fps) > 0 {
err := checkSIFFingerprint(ctx, src, fps, b.Opts.KeyServerOpts...)
if err != nil {
return nil, fmt.Errorf("while checking fingerprint: %s", err)
}
} else {
// Otherwise do a verification and make failures warn, like for push
err := verifySIF(ctx, src, b.Opts.KeyServerOpts...)
if err != nil {
sylog.Warningf("%s", err)
sylog.Warningf("Bootstrap image could not be verified, but build will continue.")
}
}
return &SIFPacker{
srcFile: src,
b: b,
img: imageObject,
}, nil
case image.SQUASHFS:
sylog.Debugf("Packing from Squashfs")
return &SquashfsPacker{
srcfile: src,
b: b,
img: imageObject,
}, nil
case image.EXT3:
sylog.Debugf("Packing from Ext3")
return &Ext3Packer{
srcfile: src,
b: b,
img: imageObject,
}, nil
case image.SANDBOX:
sylog.Debugf("Packing from Sandbox")
return &SandboxPacker{
srcdir: src,
b: b,
}, nil
default:
return nil, fmt.Errorf("invalid image format")
}
}
// Get just stores the source.
func (cp *LocalConveyorPacker) Get(ctx context.Context, b *types.Bundle) (err error) {
// insert base metadata before unpacking fs
if err = makeBaseEnv(b.RootfsPath); err != nil {
return fmt.Errorf("while inserting base environment: %v", err)
}
cp.src = filepath.Clean(b.Recipe.Header["from"])
cp.LocalPacker, err = GetLocalPacker(ctx, cp.src, b)
return err
}
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