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tailscale/release/dist/synology/pkgs.go

307 lines
7.7 KiB
Go

// Copyright (c) Tailscale Inc & AUTHORS
// SPDX-License-Identifier: BSD-3-Clause
// Package synology contains dist Targets for building Synology Tailscale packages.
package synology
import (
"archive/tar"
"bytes"
"compress/gzip"
"embed"
"fmt"
"io"
"io/fs"
"log"
"os"
"path/filepath"
"time"
"tailscale.com/release/dist"
)
type target struct {
filenameArch string
dsmMajorVersion int
goenv map[string]string
packageCenter bool
}
func (t *target) String() string {
return fmt.Sprintf("synology/dsm%d/%s", t.dsmMajorVersion, t.filenameArch)
}
func (t *target) Build(b *dist.Build) ([]string, error) {
inner, err := getSynologyBuilds(b).buildInnerPackage(b, t.dsmMajorVersion, t.goenv)
if err != nil {
return nil, err
}
out, err := t.buildSPK(b, inner)
if err != nil {
return nil, err
}
return []string{out}, nil
}
func (t *target) buildSPK(b *dist.Build, inner *innerPkg) (string, error) {
filename := fmt.Sprintf("tailscale-%s-%s-%d-dsm%d.spk", t.filenameArch, b.Version.Short, b.Version.Synology[t.dsmMajorVersion], t.dsmMajorVersion)
out := filepath.Join(b.Out, filename)
log.Printf("Building %s", filename)
privFile := fmt.Sprintf("privilege-dsm%d", t.dsmMajorVersion)
if t.packageCenter && t.dsmMajorVersion == 7 {
privFile += ".for-package-center"
}
f, err := os.Create(out)
if err != nil {
return "", err
}
defer f.Close()
tw := tar.NewWriter(f)
defer tw.Close()
err = writeTar(tw, b.Time,
memFile("INFO", t.mkInfo(b, inner.uncompressedSz), 0644),
static("PACKAGE_ICON.PNG", "PACKAGE_ICON.PNG", 0644),
static("PACKAGE_ICON_256.PNG", "PACKAGE_ICON_256.PNG", 0644),
static("Tailscale.sc", "Tailscale.sc", 0644),
dir("conf"),
static("resource", "conf/resource", 0644),
static(privFile, "conf/privilege", 0644),
file(inner.path, "package.tgz", 0644),
dir("scripts"),
static("scripts/start-stop-status", "scripts/start-stop-status", 0644),
static("scripts/postupgrade", "scripts/postupgrade", 0644),
static("scripts/preupgrade", "scripts/preupgrade", 0644),
)
if err != nil {
return "", err
}
if err := tw.Close(); err != nil {
return "", err
}
if err := f.Close(); err != nil {
return "", err
}
return out, nil
}
func (t *target) mkInfo(b *dist.Build, uncompressedSz int64) []byte {
var ret bytes.Buffer
f := func(k, v string) {
fmt.Fprintf(&ret, "%s=%q\n", k, v)
}
f("package", "Tailscale")
f("version", fmt.Sprintf("%s-%d", b.Version.Short, b.Version.Synology[t.dsmMajorVersion]))
f("arch", t.filenameArch)
f("description", "Connect all your devices using WireGuard, without the hassle.")
f("displayname", "Tailscale")
f("maintainer", "Tailscale, Inc.")
f("maintainer_url", "https://github.com/tailscale/tailscale")
f("create_time", b.Time.Format("20060102-15:04:05"))
f("dsmuidir", "ui")
f("dsmappname", "SYNO.SDS.Tailscale")
f("startstop_restart_services", "nginx")
switch t.dsmMajorVersion {
case 6:
f("os_min_ver", "6.0.1-7445")
f("os_max_ver", "7.0-40000")
case 7:
f("os_min_ver", "7.0-40000")
f("os_max_ver", "")
default:
panic(fmt.Sprintf("unsupported DSM major version %d", t.dsmMajorVersion))
}
f("extractsize", fmt.Sprintf("%v", uncompressedSz>>10)) // in KiB
return ret.Bytes()
}
type synologyBuildsMemoizeKey struct{}
type innerPkg struct {
path string
uncompressedSz int64
}
// synologyBuilds is extra build context shared by all synology builds.
type synologyBuilds struct {
innerPkgs dist.Memoize[*innerPkg]
}
// getSynologyBuilds returns the synologyBuilds for b, creating one if needed.
func getSynologyBuilds(b *dist.Build) *synologyBuilds {
return b.Extra(synologyBuildsMemoizeKey{}, func() any { return new(synologyBuilds) }).(*synologyBuilds)
}
// buildInnerPackage builds the inner tarball for synology packages,
// which contains the files to unpack to disk on installation (as
// opposed to the outer tarball, which contains package metadata)
func (m *synologyBuilds) buildInnerPackage(b *dist.Build, dsmVersion int, goenv map[string]string) (*innerPkg, error) {
key := []any{dsmVersion, goenv}
return m.innerPkgs.Do(key, func() (*innerPkg, error) {
ts, err := b.BuildGoBinary("tailscale.com/cmd/tailscale", goenv)
if err != nil {
return nil, err
}
tsd, err := b.BuildGoBinary("tailscale.com/cmd/tailscaled", goenv)
if err != nil {
return nil, err
}
tmp := b.TmpDir()
out := filepath.Join(tmp, "package.tgz")
f, err := os.Create(out)
if err != nil {
return nil, err
}
defer f.Close()
gw := gzip.NewWriter(f)
defer gw.Close()
cw := &countingWriter{gw, 0}
tw := tar.NewWriter(cw)
defer tw.Close()
err = writeTar(tw, b.Time,
dir("bin"),
file(tsd, "bin/tailscaled", 0755),
file(ts, "bin/tailscale", 0755),
dir("conf"),
static("Tailscale.sc", "conf/Tailscale.sc", 0644),
static(fmt.Sprintf("logrotate-dsm%d", dsmVersion), "conf/logrotate.conf", 0644),
dir("ui"),
static("PACKAGE_ICON_256.PNG", "ui/PACKAGE_ICON_256.PNG", 0644),
static("config", "ui/config", 0644), // TODO: this has "1.8.3" hard-coded in it; why? what is it? bug?
static("index.cgi", "ui/index.cgi", 0755))
if err != nil {
return nil, err
}
if err := tw.Close(); err != nil {
return nil, err
}
if err := gw.Close(); err != nil {
return nil, err
}
if err := f.Close(); err != nil {
return nil, err
}
return &innerPkg{out, cw.n}, nil
})
}
// writeTar writes ents to tw.
func writeTar(tw *tar.Writer, modTime time.Time, ents ...tarEntry) error {
for _, ent := range ents {
if err := ent(tw, modTime); err != nil {
return err
}
}
return nil
}
// tarEntry is a function that writes tar entries (files or
// directories) to a tar.Writer.
type tarEntry func(*tar.Writer, time.Time) error
// fsFile returns a tarEntry that writes src in fsys to dst in the tar
// file, with mode.
func fsFile(fsys fs.FS, src, dst string, mode int64) tarEntry {
return func(tw *tar.Writer, modTime time.Time) error {
f, err := fsys.Open(src)
if err != nil {
return err
}
defer f.Close()
fi, err := f.Stat()
if err != nil {
return err
}
hdr := &tar.Header{
Name: dst,
Size: fi.Size(),
Mode: mode,
ModTime: modTime,
}
if err := tw.WriteHeader(hdr); err != nil {
return err
}
if _, err = io.Copy(tw, f); err != nil {
return err
}
return nil
}
}
// file returns a tarEntry that writes src on disk into the tar file as
// dst, with mode.
func file(src, dst string, mode int64) tarEntry {
return fsFile(os.DirFS(filepath.Dir(src)), filepath.Base(src), dst, mode)
}
//go:embed files/*
var files embed.FS
// static returns a tarEntry that writes src in files/ into the tar
// file as dst, with mode.
func static(src, dst string, mode int64) tarEntry {
fsys, err := fs.Sub(files, "files")
if err != nil {
panic(err)
}
return fsFile(fsys, src, dst, mode)
}
// memFile returns a tarEntry that writes bs to dst in the tar file,
// with mode.
func memFile(dst string, bs []byte, mode int64) tarEntry {
return func(tw *tar.Writer, modTime time.Time) error {
hdr := &tar.Header{
Name: dst,
Size: int64(len(bs)),
Mode: mode,
ModTime: modTime,
}
if err := tw.WriteHeader(hdr); err != nil {
return err
}
if _, err := tw.Write(bs); err != nil {
return err
}
return nil
}
}
// dir returns a tarEntry that creates a world-readable directory in
// the tar file.
func dir(name string) tarEntry {
return func(tw *tar.Writer, modTime time.Time) error {
return tw.WriteHeader(&tar.Header{
Typeflag: tar.TypeDir,
Name: name + "/",
Mode: 0755,
ModTime: modTime,
// TODO: why tailscale? Files are being written as owned by root.
Uname: "tailscale",
Gname: "tailscale",
})
}
}
type countingWriter struct {
w io.Writer
n int64
}
func (cw *countingWriter) Write(bs []byte) (int, error) {
n, err := cw.w.Write(bs)
cw.n += int64(n)
return n, err
}