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utils.go
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/
utils.go
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package maven
import (
"io"
"github.com/mandelsoft/goutils/errors"
"github.com/mandelsoft/goutils/finalizer"
"github.com/mandelsoft/goutils/optionutils"
"github.com/mandelsoft/vfs/pkg/osfs"
"github.com/mandelsoft/vfs/pkg/vfs"
"github.com/opencontainers/go-digest"
"github.com/open-component-model/ocm/pkg/blobaccess/blobaccess"
"github.com/open-component-model/ocm/pkg/blobaccess/bpi"
"github.com/open-component-model/ocm/pkg/blobaccess/file"
"github.com/open-component-model/ocm/pkg/common/accessio"
"github.com/open-component-model/ocm/pkg/common/accessobj"
"github.com/open-component-model/ocm/pkg/contexts/credentials"
"github.com/open-component-model/ocm/pkg/contexts/credentials/builtin/maven/identity"
"github.com/open-component-model/ocm/pkg/iotools"
"github.com/open-component-model/ocm/pkg/maven"
"github.com/open-component-model/ocm/pkg/mime"
"github.com/open-component-model/ocm/pkg/utils"
"github.com/open-component-model/ocm/pkg/utils/tarutils"
)
type coords = *maven.Coordinates
type spec struct {
coords
repo *maven.Repository
options *Options
}
func (s *spec) getBlobAccess() (_ bpi.BlobAccess, rerr error) {
var finalize finalizer.Finalizer
defer finalize.FinalizeWithErrorPropagation(&rerr)
log := s.options.Logger("RepoUrl", s.repo.String())
creds, err := s.options.GetCredentials(s.repo, s.GroupId)
if err != nil {
return nil, err
}
fileMap, err := s.repo.GavFiles(s.coords, creds)
if err != nil {
return nil, err
}
fileMap = s.coords.FilterFileMap(fileMap)
switch l := len(fileMap); {
case l <= 0:
return nil, errors.New("no maven artifact files found")
case l == 1 && optionutils.AsValue(s.Extension) != "" && s.Classifier != nil:
for file, hash := range fileMap {
metadata, err := s.repo.GetFileMeta(s.coords, file, hash, creds)
if err != nil {
return nil, err
}
return blobAccessForRepositoryAccess(metadata, creds, s.options)
}
// default: continue below with: create tmpfs where all files can be downloaded to and packed together as tar.gz
}
tmpfs, err := osfs.NewTempFileSystem()
if err != nil {
return nil, err
}
finalize.With(func() error {
return vfs.Cleanup(tmpfs)
})
for file, hash := range fileMap {
loop := finalize.Nested()
metadata, err := s.repo.GetFileMeta(s.coords, file, hash, creds)
if err != nil {
return nil, err
}
// download the artifact into the temporary file system
out, err := tmpfs.Create(file)
if err != nil {
return nil, err
}
loop.Close(out)
reader, err := metadata.Location.GetReader(creds)
if err != nil {
return nil, err
}
loop.Close(reader)
if hash > 0 {
dreader := iotools.NewDigestReaderWithHash(hash, reader)
_, err = io.Copy(out, dreader)
if err != nil {
return nil, err
}
sum := dreader.Digest().Encoded()
if metadata.Hash != sum {
return nil, errors.Newf("%s digest mismatch: expected %s, found %s", metadata.HashType, metadata.Hash, sum)
}
} else {
_, err = io.Copy(out, reader)
return nil, err
}
err = loop.Finalize()
if err != nil {
return nil, err
}
}
// pack all downloaded files into a tar.gz file
fs := utils.FileSystem(s.options.CachingFileSystem)
tgz, err := vfs.TempFile(fs, "", "maven-"+s.coords.FileNamePrefix()+"-*.tar.gz")
if err != nil {
return nil, err
}
dw := iotools.NewDigestWriterWith(digest.SHA256, tgz)
finalize.Close(dw)
err = tarutils.TgzFs(tmpfs, dw)
if err != nil {
return nil, err
}
log.Debug("created", "file", tgz.Name())
return file.BlobAccessForTemporaryFilePath(mime.MIME_TGZ, tgz.Name(), file.WithFileSystem(fs), file.WithDigest(dw.Digest()), file.WithSize(dw.Size())), nil
}
func blobAccessForRepositoryAccess(meta *BlobMeta, creds maven.Credentials, opts *Options) (bpi.BlobAccess, error) {
reader := func() (io.ReadCloser, error) {
return meta.Location.GetReader(creds)
}
if meta.Hash != "" {
getreader := reader
reader = func() (io.ReadCloser, error) {
readCloser, err := getreader()
if err != nil {
return nil, err
}
return iotools.VerifyingReaderWithHash(readCloser, meta.HashType, meta.Hash), nil
}
}
acc := blobaccess.DataAccessForReaderFunction(reader, meta.Location.String())
return accessobj.CachedBlobAccessForWriterWithCache(opts.Cache(), meta.MimeType, accessio.NewDataAccessWriter(acc)), nil
}
func MapCredentials(creds credentials.Credentials) maven.Credentials {
if creds == nil || (!creds.ExistsProperty(identity.ATTR_USERNAME) && !creds.ExistsProperty(identity.ATTR_PASSWORD)) {
return nil
}
return &maven.BasicAuthCredentials{
Username: creds.GetProperty(identity.ATTR_USERNAME),
Password: creds.GetProperty(identity.ATTR_PASSWORD),
}
}
func GetCredentials(ctx credentials.ContextProvider, repo *Repository, groupId string) (maven.Credentials, error) {
consumerid, err := identity.GetConsumerId(repo.String(), groupId)
if err != nil {
return nil, err
}
creds, err := credentials.CredentialsForConsumer(ctx, consumerid, identity.IdentityMatcher)
if err != nil {
return nil, err
}
return MapCredentials(creds), nil
}