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Blob type linting and docs

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Signed-off-by: Brandon Mitchell <git@bmitch.net>
This commit is contained in:
Brandon Mitchell
2022-02-03 20:06:18 -05:00
parent 6e1dd8cfad
commit 5c2a4b5890
4 changed files with 33 additions and 22 deletions
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29
types/blob/blob.go
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@ -1,3 +1,4 @@
// Package blob is the underlying type for pushing and pulling blobs
package blob
import (
@ -14,7 +15,7 @@ type Blob interface {
RawBody() ([]byte, error)
}
type BlobConfig struct {
type blobConfig struct {
desc ociv1.Descriptor
header http.Header
image ociv1.Image
@ -23,36 +24,46 @@ type BlobConfig struct {
resp *http.Response
}
type Opts func(*BlobConfig)
type Opts func(*blobConfig)
// WithDesc specifies the descriptor associated with the blob
func WithDesc(d ociv1.Descriptor) Opts {
return func(bc *BlobConfig) {
return func(bc *blobConfig) {
bc.desc = d
}
}
// WithHeader defines the headers received when pulling a blob
func WithHeader(header http.Header) Opts {
return func(bc *BlobConfig) {
return func(bc *blobConfig) {
bc.header = header
}
}
// WithImage provides the OCI Image config needed for config blobs
func WithImage(image ociv1.Image) Opts {
return func(bc *BlobConfig) {
return func(bc *blobConfig) {
bc.image = image
}
}
// WithReader defines the reader for a new blob
func WithReader(rc io.Reader) Opts {
return func(bc *BlobConfig) {
return func(bc *blobConfig) {
bc.rdr = rc
}
}
// WithRef specifies the reference where the blob was pulled from
func WithRef(r ref.Ref) Opts {
return func(bc *BlobConfig) {
return func(bc *blobConfig) {
bc.r = r
}
}
// WithResp includes the http response, which is used to extract the headers and reader
func WithResp(resp *http.Response) Opts {
return func(bc *BlobConfig) {
return func(bc *blobConfig) {
bc.resp = resp
if bc.header == nil {
bc.header = resp.Header

8
types/blob/blob_test.go
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@ -137,7 +137,7 @@ func TestCommon(t *testing.T) {
t.Errorf("rawbody: %v", err)
return
}
if bytes.Compare(bb, tt.eBytes) != 0 {
if !bytes.Equal(bb, tt.eBytes) {
t.Errorf("rawbody, expected %s, received %s", string(tt.eBytes), string(bb))
}
}
@ -213,7 +213,7 @@ func TestReader(t *testing.T) {
if pos != 0 {
t.Errorf("seek pos, expected 0, received %d", pos)
}
bb, err = io.ReadAll(b)
_, err = io.ReadAll(b)
if err != nil {
t.Errorf("readall: %v", err)
return
@ -251,7 +251,7 @@ func TestReader(t *testing.T) {
t.Errorf("config rawbody: %v", err)
return
}
if bytes.Compare(exBlob, ocb) != 0 {
if !bytes.Equal(exBlob, ocb) {
t.Errorf("config bytes, expected %s, received %s", string(exBlob), string(ocb))
}
})
@ -267,7 +267,7 @@ func TestReader(t *testing.T) {
t.Errorf("rawbody: %v", err)
return
}
if bytes.Compare(exBlob, bb) != 0 {
if !bytes.Equal(exBlob, bb) {
t.Errorf("config bytes, expected %s, received %s", string(exBlob), string(bb))
}
})

2
types/blob/ociconfig.go
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@ -23,7 +23,7 @@ type ociConfig struct {
// NewOCIConfig creates a new BlobOCIConfig from an OCI Image
func NewOCIConfig(opts ...Opts) OCIConfig {
bc := BlobConfig{}
bc := blobConfig{}
for _, opt := range opts {
opt(&bc)
}

16
types/blob/reader.go
View File

@ -29,7 +29,7 @@ type reader struct {
// NewReader creates a new reader
func NewReader(opts ...Opts) Reader {
bc := BlobConfig{}
bc := blobConfig{}
for _, opt := range opts {
opt(&bc)
}
@ -102,13 +102,13 @@ func (b *reader) Read(p []byte) (int, error) {
if b.desc.Size == 0 {
b.desc.Size = b.readBytes
} else if b.readBytes != b.desc.Size {
err = fmt.Errorf("Expected size mismatch [expected %d, received %d]: %w", b.desc.Size, b.readBytes, err)
err = fmt.Errorf("expected size mismatch [expected %d, received %d]: %w", b.desc.Size, b.readBytes, err)
}
// check/save digest
if b.desc.Digest == "" {
b.desc.Digest = b.digester.Digest()
} else if b.desc.Digest != b.digester.Digest() {
err = fmt.Errorf("Expected digest mismatch [expected %s, calculated %s]: %w", b.desc.Digest.String(), b.digester.Digest().String(), err)
err = fmt.Errorf("expected digest mismatch [expected %s, calculated %s]: %w", b.desc.Digest.String(), b.digester.Digest().String(), err)
}
}
return size, err
@ -121,7 +121,7 @@ func (b *reader) Seek(offset int64, whence int) (int64, error) {
}
// cannot do an arbitrary seek and still digest without a lot more complication
if offset != 0 || whence != io.SeekStart {
return b.readBytes, fmt.Errorf("Unable to seek to arbitrary position")
return b.readBytes, fmt.Errorf("unable to seek to arbitrary position")
}
rdrSeek, ok := b.origRdr.(io.Seeker)
if !ok {
@ -144,19 +144,19 @@ func (b *reader) Seek(offset int64, whence int) (int64, error) {
// ToOCIConfig converts a blobReader to a BlobOCIConfig
func (b *reader) ToOCIConfig() (OCIConfig, error) {
if !b.blobSet {
return nil, fmt.Errorf("Blob is not defined")
return nil, fmt.Errorf("blob is not defined")
}
if b.readBytes != 0 {
return nil, fmt.Errorf("Unable to convert after read has been performed")
return nil, fmt.Errorf("unable to convert after read has been performed")
}
blobBody, err := ioutil.ReadAll(b)
if err != nil {
return nil, fmt.Errorf("Error reading image config for %s: %w", b.r.CommonName(), err)
return nil, fmt.Errorf("error reading image config for %s: %w", b.r.CommonName(), err)
}
var ociImage ociv1.Image
err = json.Unmarshal(blobBody, &ociImage)
if err != nil {
return nil, fmt.Errorf("Error parsing image config for %s: %w", b.r.CommonName(), err)
return nil, fmt.Errorf("error parsing image config for %s: %w", b.r.CommonName(), err)
}
// return the resulting blobOCIConfig, reuse blobCommon, setting rawBody read above, and the unmarshaled OCI image config
return &ociConfig{common: b.common, rawBody: blobBody, Image: ociImage}, nil