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bundle.go
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bundle.go
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package reader
import (
"archive/tar"
"compress/gzip"
"encoding/json"
"io"
"strings"
multierror "github.com/hashicorp/go-multierror"
"github.com/pkg/errors"
collecttypes "github.com/replicatedcom/support-bundle/pkg/collect/types"
"github.com/replicatedcom/support-bundle/pkg/meta"
"github.com/spf13/afero"
)
type BundleReader interface {
ReaderFromRef(ref meta.Ref) (io.ReadCloser, error)
Open(name string) (io.ReadCloser, error)
GetIndex() []collecttypes.Result
GetErrorIndex() []collecttypes.Result
}
type Bundle struct {
Fs afero.Fs
Path string
index []collecttypes.Result
errors []collecttypes.Result
}
func NewBundle(fs afero.Fs, path string) (BundleReader, error) {
b := &Bundle{
Fs: fs,
Path: path,
}
var err error
b.index, err = b.getResultsFromIndex("index.json")
if err != nil {
return b, errors.Wrap(err, "get results from index.json")
}
b.errors, err = b.getResultsFromIndex("error.json")
if err != nil {
return b, errors.Wrap(err, "get results from error.json")
}
return b, nil
}
func (b *Bundle) ReaderFromRef(ref meta.Ref) (io.ReadCloser, error) {
results := b.resultsFromRef(ref)
for _, result := range results {
// TODO: sometimes we have stdout and stderr, how do we choose one?
if result.Size > 0 {
return b.Open(strings.TrimLeft(result.Path, "/"))
}
}
// TODO: what should we return here?
return nil, nil
}
func (b *Bundle) Open(name string) (io.ReadCloser, error) {
var closeFns []func() error
defer func() {
for _, closeFn := range closeFns {
closeFn()
}
}()
file, err := b.Fs.Open(b.Path)
if err != nil {
return nil, err
}
closeFns = append(closeFns, file.Close)
gzr, err := gzip.NewReader(file)
if err != nil {
return nil, err
}
closeFns = append(closeFns, gzr.Close)
tr := tar.NewReader(gzr)
for {
header, err := tr.Next()
if err == io.EOF {
return nil, io.ErrUnexpectedEOF
} else if err != nil {
return nil, err
}
if header == nil {
continue
}
if header.Name == name && header.Typeflag == tar.TypeReg {
af := &archiveFile{
tr: tr,
closeFns: closeFns,
}
closeFns = nil
return af, nil
}
}
}
func (b *Bundle) GetIndex() []collecttypes.Result {
return b.index
}
func (b *Bundle) GetErrorIndex() []collecttypes.Result {
return b.errors
}
func (b *Bundle) getResultsFromIndex(indexPath string) ([]collecttypes.Result, error) {
reader, err := b.Open(indexPath)
if err != nil {
return nil, err
}
defer reader.Close()
var results []collecttypes.Result
return results, json.NewDecoder(reader).Decode(&results)
}
func (b *Bundle) resultsFromRef(ref meta.Ref) (results []collecttypes.Result) {
for _, result := range b.index {
if meta.RefMatches(ref, result.Spec.Shared().Meta) {
results = append(results, result)
}
}
return
}
type archiveFile struct {
tr *tar.Reader
closeFns []func() error
}
func (f *archiveFile) Close() (err error) {
for _, closeFn := range f.closeFns {
errI := closeFn()
if errI != nil {
err = multierror.Append(err, errI)
}
}
return
}
func (f *archiveFile) Read(p []byte) (int, error) {
return f.tr.Read(p)
}