forked from coreos/mantle
/
create.go
362 lines (304 loc) · 9.38 KB
/
create.go
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// Copyright 2015 CoreOS, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package main
import (
"os"
"path/filepath"
"github.com/coreos/go-semver/semver"
"github.com/spf13/cobra"
"github.com/spf13/pflag"
"github.com/coreos/mantle/sdk"
"github.com/coreos/mantle/sdk/repo"
)
const (
coreosManifestURL = "https://github.com/coreos/manifest.git"
)
var (
// everything uses this flag
chrootFlags *pflag.FlagSet
chrootName string
// creation flags
creationFlags *pflag.FlagSet
sdkVersion string
manifestURL string
manifestName string
manifestBranch string
repoVerify bool
sigVerify bool
// only for `create` command
allowReplace bool
// only for `enter` command
experimental bool
// only for `update` command
allowCreate bool
downgradeInPlace bool
downgradeReplace bool
newVersion string
verifyKeyFile string
setupCmd = &cobra.Command{
Use: "setup",
Short: "Setup the system for SDK use",
Run: runSetup,
}
createCmd = &cobra.Command{
Use: "create",
Short: "Download and unpack the SDK",
Run: runCreate,
}
enterCmd = &cobra.Command{
Use: "enter [-- command]",
Short: "Enter the SDK chroot, optionally running a command",
Run: runEnter,
}
deleteCmd = &cobra.Command{
Use: "delete",
Short: "Delete the SDK chroot",
Run: runDelete,
}
updateCmd = &cobra.Command{
Use: "update",
Short: "Update the SDK chroot and source tree",
Run: runUpdate,
}
verifyCmd = &cobra.Command{
Use: "verify",
Short: "Check repo tree and release manifest match",
Run: runVerify,
}
)
func init() {
// the names and error handling of these flag sets are meaningless,
// the flag sets are only used to group common options together.
chrootFlags = pflag.NewFlagSet("chroot", pflag.ExitOnError)
chrootFlags.StringVar(&chrootName,
"chroot", "chroot", "SDK chroot directory name")
creationFlags = pflag.NewFlagSet("creation", pflag.ExitOnError)
creationFlags.StringVar(&sdkVersion,
"sdk-version", "", "SDK version. Defaults to the SDK version in version.txt")
creationFlags.StringVar(&manifestURL,
"manifest-url", coreosManifestURL, "Manifest git repo location")
creationFlags.StringVar(&manifestBranch,
"manifest-branch", "master", "Manifest git repo branch")
creationFlags.StringVar(&manifestName,
"manifest-name", "default.xml", "Manifest file name")
creationFlags.BoolVar(&repoVerify,
"verify", false, "Check repo tree and release manifest match")
creationFlags.StringVar(&verifyKeyFile,
"verify-key", "", "PGP public key to be used in verifing download signatures. Defaults to CoreOS Buildbot (0412 7D0B FABE C887 1FFB 2CCE 50E0 8855 93D2 DCB4)")
creationFlags.BoolVar(&sigVerify,
"verify-signature", false, "Verify the manifest Git tag with GPG")
root.AddCommand(setupCmd)
createCmd.Flags().AddFlagSet(chrootFlags)
createCmd.Flags().AddFlagSet(creationFlags)
createCmd.Flags().BoolVar(&allowReplace,
"replace", false, "Replace an existing SDK chroot")
root.AddCommand(createCmd)
enterCmd.Flags().AddFlagSet(chrootFlags)
enterCmd.Flags().BoolVar(&experimental,
"experimental", false, "Use new enter implementation")
root.AddCommand(enterCmd)
deleteCmd.Flags().AddFlagSet(chrootFlags)
root.AddCommand(deleteCmd)
updateCmd.Flags().AddFlagSet(chrootFlags)
updateCmd.Flags().AddFlagSet(creationFlags)
updateCmd.Flags().BoolVar(&allowCreate,
"create", false, "Create the SDK chroot if missing")
updateCmd.Flags().BoolVar(&downgradeInPlace,
"downgrade-in-place", false,
"Allow in-place downgrades of SDK chroot")
updateCmd.Flags().BoolVar(&downgradeReplace,
"downgrade-replace", false,
"Replace SDK chroot instead of downgrading")
updateCmd.Flags().StringVar(&newVersion,
"new-version", "", "Hint at the new version. Defaults to the version in version.txt")
root.AddCommand(updateCmd)
root.AddCommand(verifyCmd)
}
func runSetup(cmd *cobra.Command, args []string) {
if len(args) != 0 {
plog.Fatal("No args accepted")
}
if err := installQemuBinfmt(); err != nil {
plog.Fatal("Install QEMU binfmt failed: ", err)
}
}
func installQemuBinfmt() error {
const dest = "/etc/binfmt.d/qemu-aarch64.conf"
const data = ":qemu-aarch64:M::\\x7fELF\\x02\\x01\\x01\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x02\\x00\\xb7:\\xff\\xff\\xff\\xff\\xff\\xff\\xff\\x00\\xff\\xff\\xff\\xff\\xff\\xff\\xff\\xff\\xfe\\xff\\xff:/usr/bin/qemu-aarch64-static:"
// Only install if file does not exist
if _, err := os.Stat(dest); err == nil {
return nil
}
dir := filepath.Dir(dest)
if err := os.MkdirAll(dir, 0755); err != nil {
return err
}
file, err := os.Create(dest)
if err != nil {
return err
}
if _, err := file.WriteString(data); err != nil {
return err
}
if err := file.Close(); err != nil {
os.Remove(dest)
return err
}
return nil
}
func runCreate(cmd *cobra.Command, args []string) {
if len(args) != 0 {
plog.Fatal("No args accepted")
}
if sdkVersion == "" {
plog.Noticef("Detecting SDK version")
getRemoteVersions := sdk.VersionsFromRemoteRepo
if sigVerify {
getRemoteVersions = sdk.VersionsFromSignedRemoteRepo
}
if ver, err := sdk.VersionsFromManifest(); err == nil {
sdkVersion = ver.SDKVersion
plog.Noticef("Found SDK version %s from local repo", sdkVersion)
} else if ver, err := getRemoteVersions(manifestURL, manifestBranch); err == nil {
sdkVersion = ver.SDKVersion
plog.Noticef("Found SDK version %s from remote repo", sdkVersion)
} else {
plog.Fatalf("Reading from remote repo failed: %v", err)
}
}
unpackChroot(allowReplace)
updateRepo()
}
func unpackChroot(replace bool) {
plog.Noticef("Downloading SDK version %s", sdkVersion)
if err := sdk.DownloadSDK(sdkVersion, verifyKeyFile); err != nil {
plog.Fatalf("Download failed: %v", err)
}
if replace {
if err := sdk.Delete(chrootName); err != nil {
plog.Fatalf("Replace failed: %v", err)
}
}
if err := sdk.Unpack(sdkVersion, chrootName); err != nil {
plog.Fatalf("Create failed: %v", err)
}
if err := sdk.Setup(chrootName); err != nil {
plog.Fatalf("Create failed: %v", err)
}
}
func updateRepo() {
if err := sdk.RepoInit(chrootName, manifestURL, manifestBranch, manifestName); err != nil {
plog.Fatalf("repo init failed: %v", err)
}
if sigVerify {
if err := sdk.RepoVerifyTag(manifestBranch); err != nil {
plog.Fatalf("repo tag verification failed: %v", err)
}
}
if err := sdk.RepoSync(chrootName); err != nil {
plog.Fatalf("repo sync failed: %v", err)
}
if repoVerify {
if err := repo.VerifySync(manifestName); err != nil {
plog.Fatalf("Verify failed: %v", err)
}
}
}
func runEnter(cmd *cobra.Command, args []string) {
enter := sdk.OldEnter
if experimental {
enter = sdk.Enter
}
if err := enter(chrootName, args...); err != nil && len(args) != 0 {
plog.Fatalf("Running %v failed: %v", args, err)
}
}
func runDelete(cmd *cobra.Command, args []string) {
if len(args) != 0 {
plog.Fatal("No args accepted")
}
if err := sdk.Delete(chrootName); err != nil {
plog.Fatalf("Delete failed: %v", err)
}
}
func verLessThan(a, b string) bool {
aver, err := semver.NewVersion(a)
if err != nil {
plog.Fatal(err)
}
bver, err := semver.NewVersion(b)
if err != nil {
plog.Fatal(err)
}
return aver.LessThan(*bver)
}
func runUpdate(cmd *cobra.Command, args []string) {
const updateChroot = "/mnt/host/source/src/scripts/update_chroot"
updateCommand := append([]string{updateChroot}, args...)
// avoid downgrade strategy ambiguity
if downgradeInPlace && downgradeReplace {
plog.Fatal("Conflicting downgrade options")
}
if sdkVersion == "" || newVersion == "" {
plog.Notice("Detecting versions in remote repo")
getRemoteVersions := sdk.VersionsFromRemoteRepo
if sigVerify {
getRemoteVersions = sdk.VersionsFromSignedRemoteRepo
}
ver, err := getRemoteVersions(manifestURL, manifestBranch)
if err != nil {
plog.Fatalf("Reading from remote repo failed: %v", err)
}
if newVersion == "" {
newVersion = ver.Version
}
if sdkVersion == "" {
sdkVersion = ver.SDKVersion
}
}
plog.Infof("New version %s", newVersion)
plog.Infof("SDK version %s", sdkVersion)
plog.Info("Checking version of local chroot")
chroot := filepath.Join(sdk.RepoRoot(), chrootName)
old, err := sdk.OSRelease(chroot)
if err != nil {
if allowCreate && os.IsNotExist(err) {
unpackChroot(false)
} else {
plog.Fatal(err)
}
} else if verLessThan(newVersion, old.Version) {
plog.Noticef("Downgrade from %s to %s required!",
old.Version, newVersion)
if downgradeReplace {
unpackChroot(true)
} else if downgradeInPlace {
plog.Infof("Attempting to downgrade existing chroot.")
} else {
plog.Fatalf("Refusing to downgrade.")
}
}
updateRepo()
if err := sdk.Enter(chrootName, updateCommand...); err != nil {
plog.Fatalf("update_chroot failed: %v", err)
}
}
func runVerify(cmd *cobra.Command, args []string) {
if len(args) != 0 {
plog.Fatal("No args accepted")
}
if err := repo.VerifySync(""); err != nil {
plog.Fatalf("Verify failed: %v", err)
}
}