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sap-jenkins-library/pkg/cnbutils/buildpack.go
Pavel Busko 63a79c9e41
feat(cnbBuild) generate SBOM files with syft (#4150)
* feat(cnbBuild) generate SBOM files with syft

Co-authored-by: Pavel Busko <pavel.busko@sap.com>
Co-authored-by: Sumit Kulhadia <sumit.kulhadia@sap.com>
2022-12-13 10:51:14 +01:00

100 lines
3.2 KiB
Go

// Package cnbutils provides utility functions to interact with Buildpacks
package cnbutils
import (
"encoding/json"
"os"
"path/filepath"
"github.com/SAP/jenkins-library/pkg/log"
"github.com/pkg/errors"
)
const bpCacheDir = "/tmp/buildpacks_cache"
type BuildPackMetadata struct {
ID string `toml:"id,omitempty" json:"id,omitempty" yaml:"id,omitempty"`
Name string `toml:"name,omitempty" json:"name,omitempty" yaml:"name,omitempty"`
Version string `toml:"version,omitempty" json:"version,omitempty" yaml:"version,omitempty"`
Description string `toml:"description,omitempty" json:"description,omitempty" yaml:"description,omitempty"`
Homepage string `toml:"homepage,omitempty" json:"homepage,omitempty" yaml:"homepage,omitempty"`
Keywords []string `toml:"keywords,omitempty" json:"keywords,omitempty" yaml:"keywords,omitempty"`
Licenses []License `toml:"licenses,omitempty" json:"licenses,omitempty" yaml:"licenses,omitempty"`
}
type License struct {
Type string `toml:"type" json:"type"`
URI string `toml:"uri" json:"uri"`
}
func DownloadBuildpacks(path string, bpacks []string, dockerCreds string, utils BuildUtils) (Order, error) {
if dockerCreds != "" {
os.Setenv("DOCKER_CONFIG", filepath.Dir(dockerCreds))
}
var orderEntry OrderEntry
order := Order{
Utils: utils,
}
err := utils.MkdirAll(bpCacheDir, os.ModePerm)
if err != nil {
return Order{}, errors.Wrap(err, "failed to create temp directory for buildpack cache")
}
for _, bpack := range bpacks {
var bpackMeta BuildPackMetadata
imageInfo, err := utils.GetRemoteImageInfo(bpack)
if err != nil {
return Order{}, errors.Wrap(err, "failed to get remote image info of buildpack")
}
hash, err := imageInfo.Digest()
if err != nil {
return Order{}, errors.Wrap(err, "failed to get image digest")
}
cacheDir := filepath.Join(bpCacheDir, hash.String())
cacheExists, err := utils.DirExists(cacheDir)
if err != nil {
return Order{}, errors.Wrapf(err, "failed to check if cache dir '%s' exists", cacheDir)
}
if cacheExists {
log.Entry().Infof("Using cached buildpack '%s'", bpack)
} else {
err := utils.MkdirAll(cacheDir, os.ModePerm)
if err != nil {
return Order{}, errors.Wrap(err, "failed to create temp directory for buildpack cache")
}
log.Entry().Infof("Downloading buildpack '%s' to %s", bpack, cacheDir)
img, err := utils.DownloadImageContent(bpack, cacheDir)
if err != nil {
return Order{}, errors.Wrapf(err, "failed download buildpack image '%s'", bpack)
}
imageInfo = img
}
imgConf, err := imageInfo.ConfigFile()
if err != nil {
return Order{}, errors.Wrapf(err, "failed to read '%s' image config", bpack)
}
err = json.Unmarshal([]byte(imgConf.Config.Labels["io.buildpacks.buildpackage.metadata"]), &bpackMeta)
if err != nil {
return Order{}, errors.Wrapf(err, "failed unmarshal '%s' image label", bpack)
}
log.Entry().Debugf("Buildpack metadata: '%v'", bpackMeta)
orderEntry.Group = append(orderEntry.Group, bpackMeta)
err = CopyProject(filepath.Join(cacheDir, "cnb/buildpacks"), path, nil, nil, utils)
if err != nil {
return Order{}, err
}
}
order.Order = []OrderEntry{orderEntry}
return order, nil
}