func NewDebReader(rdr io.Reader) (*DebReader, error) {
drdr := &DebReader{Reader: rdr, HasDebianVersion: false}
arr, err := ar.NewReader(rdr)
if err != nil {
return nil, err
}
drdr.ArReader = arr
return drdr, err
}
//debGetContents just lists the contents of a tar.gz file within the archive
func debGetContents(rdr io.Reader, topLevelFilename string) ([]string, error) {
ret := []string{}
fileNotFound := true
arr, err := ar.NewReader(rdr)
if err != nil {
return nil, err
}
for {
hdr, err := arr.Next()
if err == io.EOF {
// end of ar archive
break
}
if err != nil {
return nil, err
}
if hdr.Name == topLevelFilename {
fileNotFound = false
tgzr, err := targz.NewReader(arr)
if err != nil {
e := tgzr.Close()
if e != nil {
//log it here?
}
return nil, err
}
for {
thdr, err := tgzr.Next()
if err == io.EOF {
// end of tar.gz archive
break
}
if err != nil {
e := tgzr.Close()
if e != nil {
//log it here?
}
return nil, err
}
ret = append(ret, thdr.Name)
}
}
}
if fileNotFound {
return nil, fmt.Errorf("File not found")
}
return ret, nil
}
//Reading an ar archive ...
func XTest_learning_reading_ar(t *testing.T) {
rdr, err := os.Open(filepath.Join(deb.DistDirDefault, "testpkg_0.0.2_amd64.deb"))
if err != nil {
t.Fatalf("%v", err)
}
arr, err := ar.NewReader(rdr)
if err != nil {
t.Fatalf("%v", err)
}
// Iterate through the files in the archive.
for {
hdr, err := arr.Next()
if err == io.EOF {
// end of ar archive
break
}
if err != nil {
t.Fatalf("%v", err)
}
t.Logf("File %s:\n", hdr.Name)
if strings.HasSuffix(hdr.Name, ".tar.gz") {
// TODO
} else if strings.HasSuffix(hdr.Name, ".tar") {
// TODO
} else if hdr.Name == "debian-binary" {
b, err := ioutil.ReadAll(arr)
if err != nil {
t.Fatalf("%v", err)
}
t.Logf("Debian binary contents: %s", string(b))
} else {
t.Logf("Unsupported file %s:\n", hdr.Name)
}
/*
if _, err := io.Copy(os.Stdout, arr); err != nil {
t.Fatalf("%v", err)
}
*/
}
}
func DebExtractFileL2(rdr io.Reader, topLevelFilename string, secondLevelFilename string, destination io.Writer) error {
arr, err := ar.NewReader(rdr)
if err != nil {
return err
}
for {
hdr, err := arr.Next()
if err == io.EOF {
// end of ar archive
break
}
if err != nil {
return err
}
if hdr.Name == topLevelFilename {
tgzr, err := targz.NewReader(arr)
if err != nil {
tgzr.Close()
return err
}
for {
thdr, err := tgzr.Next()
if err == io.EOF {
// end of tar.gz archive
break
}
if err != nil {
tgzr.Close()
return err
}
if thdr.Name == secondLevelFilename {
_, err = io.Copy(destination, tgzr)
tgzr.Close()
return nil
} else {
//SKIP
log.Printf("File %s", thdr.Name)
}
}
tgzr.Close()
}
}
return fmt.Errorf("File not found")
}
// ParseDebMetadata reads an artifact's contents.
func DebParseMetadata(rdr io.Reader) (*Package, error) {
arr, err := ar.NewReader(rdr)
if err != nil {
return nil, err
}
var pkg *Package
pkg = nil
hasDataArchive := false
hasControlArchive := false
hasControlFile := false
hasDebianBinaryFile := false
// Iterate through the files in the archive.
for {
hdr, err := arr.Next()
if err == io.EOF {
// end of ar archive
break
}
if err != nil {
return nil, err
}
// t.Logf("File %s:\n", hdr.Name)
if hdr.Name == BinaryDataArchiveNameDefault {
// SKIP!
hasDataArchive = true
} else if hdr.Name == BinaryControlArchiveNameDefault {
// Find control file
hasControlArchive = true
tgzr, err := targz.NewReader(arr)
if err != nil {
return nil, err
}
for {
thdr, err := tgzr.Next()
if err == io.EOF {
// end of tar.gz archive
break
}
if err != nil {
return nil, err
}
if path.Base(thdr.Name) == "control" {
hasControlFile = true
dscr := NewDscReader(tgzr)
pkg, err = dscr.Parse()
if err != nil {
return nil, err
}
} else {
//SKIP
log.Printf("File %s", thdr.Name)
}
}
} else if hdr.Name == "debian-binary" {
b, err := ioutil.ReadAll(arr)
if err != nil {
return nil, err
}
hasDebianBinaryFile = true
if string(b) != "2.0\n" {
return nil, fmt.Errorf("Binary version not valid: %s", string(b))
}
} else {
return nil, fmt.Errorf("Unsupported file %s", hdr.Name)
}
}
if !hasDebianBinaryFile {
return nil, fmt.Errorf("No debian-binary file in .deb archive")
}
if !hasDataArchive {
return nil, fmt.Errorf("No data.tar.gz file in .deb archive")
}
if !hasControlArchive {
return nil, fmt.Errorf("No control.tar.gz file in .deb archive")
}
if !hasControlFile {
return nil, fmt.Errorf("No debian/control file in control.tar.gz")
}
return pkg, nil
}
func validatePlatToolchainPackageVersion(dest platforms.Platform, goroot string, verbose bool) error {
platPkgFileRuntime := filepath.Join(goroot, "pkg", dest.Os+"_"+dest.Arch, "runtime.a")
nr, err := os.Open(platPkgFileRuntime)
if err != nil {
log.Printf("Could not validate toolchain version: %v", err)
}
tr, err := ar.NewReader(nr)
if err != nil {
log.Printf("Could not validate toolchain version: %v", err)
}
for {
h, err := tr.Next()
if err != nil {
if err == io.EOF {
log.Printf("Could not validate toolchain version: %v", err)
return nil
}
log.Printf("Could not validate toolchain version: %v", err)
return err
}
//log.Printf("Header: %+v", h)
if h.Name == "__.PKGDEF" {
firstLine, err := tr.NextString(50)
if err != nil {
log.Printf("failed to read first line of PKGDEF: %v", err)
return nil
}
//log.Printf("pkgdef first part: '%s'", firstLine)
expectedPrefix := "go object " + dest.Os + " " + dest.Arch + " "
if !strings.HasPrefix(firstLine, expectedPrefix) {
log.Printf("first line of __.PKGDEF does not match expected pattern: %v", expectedPrefix)
return nil
}
parts := strings.Split(firstLine, " ")
compiledVersion := parts[4]
//runtimeVersion := runtime.Version()
//log.Printf("Runtime version: %s", runtimeVersion)
cmdPath := filepath.Join(goroot, "bin", "go")
cmd := exec.Command(cmdPath)
args := []string{"version"}
err = executils.PrepareCmd(cmd, ".", args, []string{}, false)
if err != nil {
log.Printf("`go version` failed: %v", err)
return nil
}
goVersionOutput, err := cmd.Output()
if err != nil {
log.Printf("`go version` failed: %v", err)
return nil
}
//log.Printf("output: %s", string(out))
goVersionOutputParts := strings.Split(string(goVersionOutput), " ")
goVersion := goVersionOutputParts[2]
if compiledVersion != goVersion {
return errors.New("static library version '" + compiledVersion + "' does NOT match `go version` '" + goVersion + "'!")
}
if verbose {
log.Printf("Toolchain version '%s' verified against 'go %s' for %v", compiledVersion, goVersion, dest)
}
return nil
}
}
}
func Example() {
// Create a buffer to write our archive to.
wtr := new(bytes.Buffer)
// Create a new ar archive.
aw := ar.NewWriter(wtr)
// Add some files to the archive.
var files = []struct {
Name, Body string
}{
{"readme.txt", "This archive contains some text files."},
{"gopher.txt", "Gopher names:\nGeorge\nGeoffrey\nGonzo"},
{"todo.txt", "Get animal handling licence."},
}
for _, file := range files {
hdr := &ar.Header{
Name: file.Name,
Size: int64(len(file.Body)),
}
if err := aw.WriteHeader(hdr); err != nil {
log.Fatalln(err)
}
if _, err := aw.Write([]byte(file.Body)); err != nil {
log.Fatalln(err)
}
}
// Make sure to check the error on Close.
if err := aw.Close(); err != nil {
log.Fatalln(err)
}
// Open the ar archive for reading.
rdr := bytes.NewReader(wtr.Bytes())
arr, err := ar.NewReader(rdr)
if err != nil {
log.Fatalln(err)
}
// Iterate through the files in the archive.
for {
hdr, err := arr.Next()
if err == io.EOF {
// end of ar archive
break
}
if err != nil {
log.Fatalln(err)
}
fmt.Printf("Contents of %s:\n", hdr.Name)
if _, err := io.Copy(os.Stdout, arr); err != nil {
log.Fatalln(err)
}
fmt.Println()
}
// Output:
// Contents of readme.txt:
// This archive contains some text files.
// Contents of gopher.txt:
// Gopher names:
// George
// Geoffrey
// Gonzo
// Contents of todo.txt:
// Get animal handling licence.
}