expand root works

This commit is contained in:
Stephen McQuay 2018-03-05 23:43:42 -08:00
parent 509433dd3d
commit 78ebdd60ae
Signed by untrusted user: sm
GPG Key ID: 4E4B72F479BA3CE5

View File

@ -3,11 +3,11 @@ package pkg
import (
"archive/tar"
"bufio"
"compress/bzip2"
"crypto/sha256"
"fmt"
"io"
"io/ioutil"
"log"
"net/http"
"os"
"os/exec"
@ -60,7 +60,6 @@ func Install(root string, pkgs []string) error {
}
for _, m := range ms {
log.Printf("%+v", m)
if err := verifyManifestIntegrity(root, m); err != nil {
return errors.Wrap(err, "verifying pkg integrity")
}
@ -75,11 +74,19 @@ func Install(root string, pkgs []string) error {
return errors.Wrap(err, "pre-install")
}
if err := expandRoot(root, m); err != nil {
return errors.Wrap(err, "root expansion")
}
if err := script(root, m, "post-install"); err != nil {
return errors.Wrap(err, "pre-install")
}
if err := os.Remove(filepath.Join(cacheDir, m.Pkg())); err != nil {
return errors.Wrapf(err, "cleaning up pkg %v", m.Pkg())
}
}
return errors.New("NYI")
return nil
}
func download(cache string, ms pm.Metas) error {
@ -272,3 +279,56 @@ func script(root string, m pm.Meta, name string) error {
cmd.Stderr = os.Stderr
return cmd.Run()
}
func expandRoot(root string, m pm.Meta) error {
bomn := filepath.Join(root, installed, string(m.Name), "bom.sha256")
bf, err := os.Open(bomn)
if err != nil {
return errors.Wrap(err, "opening bom")
}
cs := map[string]string{}
s := bufio.NewScanner(bf)
for s.Scan() {
elems := strings.Split(s.Text(), "\t")
if len(elems) != 2 {
return errors.Errorf("manifest format error; got %d elements, want 2", len(elems))
}
cs[elems[1]] = elems[0]
}
pn := filepath.Join(root, cache, m.Pkg())
tbz, err := getReadCloser(pn, "root.tar.bz2")
if err != nil {
return errors.Wrap(err, "getting root.tar.bz2 reader")
}
tr := tar.NewReader(bzip2.NewReader(tbz))
for {
hdr, err := tr.Next()
if err == io.EOF {
break
}
if err != nil {
return errors.Wrap(err, "tar traversal")
}
if hdr.FileInfo().IsDir() {
d := filepath.Join(root, hdr.Name)
if err := os.MkdirAll(d, hdr.FileInfo().Mode()); err != nil {
return errors.Wrapf(err, "making directory %q", d)
}
continue
}
f, err := os.OpenFile(filepath.Join(root, hdr.Name), os.O_WRONLY|os.O_CREATE, hdr.FileInfo().Mode())
if err != nil {
return errors.Wrapf(err, "open output file %q", hdr.Name)
}
if n, err := io.Copy(f, tr); err != nil {
return errors.Wrapf(err, "copy file %q after %v bytes", hdr.Name, n)
}
if err := f.Close(); err != nil {
return errors.Wrapf(err, "closing %q", hdr.Name)
}
}
return nil
}