// readFiles iterates through tarred files and ensures they are the same.
func readFiles(t *testing.T, f *os.File, tname string, want []file) {
r := tar.NewReader(f)
for _, fwant := range want {
fname, err := r.NextFile()
switch err {
case io.EOF:
return
default:
t.Fatalf("%s: read header for next file: %v", tname, err)
case nil: // Proceed below
}
if fname != fwant.name {
t.Fatalf("%s: incorrect file name: got %q but want %q", tname, fname, fwant.name)
continue
}
gotContents, err := ioutil.ReadAll(r)
if err != nil {
t.Fatalf("%s: read file: %v", tname, err)
}
if !bytes.Equal(gotContents, fwant.contents) {
t.Errorf("%s: %q = %q but want %q", tname, fname, gotContents, fwant.contents)
}
}
}
func reader(t *testing.T, tname string, buf *bytes.Buffer, atype string, fname string) archive.ReadCloser {
switch atype {
case gzipType:
gr, err := gzip.NewReader(buf, fname)
if err != nil {
t.Fatalf("%s: %v", tname, err)
}
return gr
case tarType:
return archive.NopCloser(tar.NewReader(buf))
case zipType:
zr, err := zip.NewReader(
bytes.NewReader(buf.Bytes()),
int64(buf.Len()))
if err != nil {
t.Fatalf("%s: new zip reader: %v", tname, err)
}
return archive.NopCloser(zr)
}
t.Fatalf("%s: unrecognized archive type: %s", tname, atype)
panic("execution continued after (*testing.T).Fatalf")
}
handleMultipleEntries: false,
archiver: func(f *os.File, exploded bool) archive.WriteCloser {
gw := gzip.NewWriter(f)
if exploded {
return gw
}
return tar.NewWriteMultiCloser(gw, gw)
},
unarchiver: func(f *os.File) (archive.ReadCloser, error) {
gr, err := gzip.NewReader(f, f.Name())
if err != nil {
return nil, err
}
// Determine if the gzip is a tar
tr := tar.NewReader(gr)
_, err = tr.Next()
isTar := err == nil
// Reset to beginning of file
if _, err := f.Seek(0, os.SEEK_SET); err != nil {
return nil, err
}
gr.Reset(f)
if isTar {
return archive.NopCloser(tar.NewReader(gr)), nil
}
return gr, nil
},
},