/
github.go
381 lines (326 loc) · 9.66 KB
/
github.go
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/*
Copyright (C) 2016 Red Hat, 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 github
import (
"bufio"
"encoding/hex"
"io"
"net/http"
"os"
"strings"
"sync"
"time"
"github.com/golang/glog"
"github.com/google/go-github/github"
"github.com/pkg/errors"
"golang.org/x/oauth2"
"gopkg.in/cheggaaa/pb.v1"
"crypto/sha256"
"fmt"
"io/ioutil"
"path/filepath"
"regexp"
"github.com/minishift/minishift/pkg/util/archive"
minishiftos "github.com/minishift/minishift/pkg/util/os"
)
type OpenShiftBinaryType string
const (
OC OpenShiftBinaryType = "oc"
OPENSHIFT OpenShiftBinaryType = "openshift"
)
func (t OpenShiftBinaryType) String() string {
return string(t)
}
const (
TAR = "tar.gz"
ZIP = "zip"
)
var (
client *github.Client
once sync.Once
)
func Client() *github.Client {
once.Do(func() {
token := GetGitHubApiToken()
var tc *http.Client
if len(token) > 0 {
ts := oauth2.StaticTokenSource(
&oauth2.Token{AccessToken: token},
)
tc = oauth2.NewClient(oauth2.NoContext, ts)
}
client = github.NewClient(tc)
})
return client
}
var tokenEnvVars = []string{"MINISHIFT_GITHUB_API_TOKEN", "HOMEBREW_GITHUB_API_TOKEN", "GH_TOKEN"}
func GetGitHubApiToken() string {
for _, envVar := range tokenEnvVars {
token := os.Getenv(envVar)
if len(token) > 0 {
return token
}
}
return ""
}
func ListOptions() *github.ListOptions {
return &github.ListOptions{}
}
func IsRateLimitError(err error) bool {
if _, ok := err.(*github.RateLimitError); ok {
return true
}
return false
}
func DownloadOpenShiftReleaseBinary(binaryType OpenShiftBinaryType, osType minishiftos.OS, version, outputPath string) error {
client := Client()
var (
err error
release *github.RepositoryRelease
resp *github.Response
)
// Get the GitHub release information - either latest or for the specified version
errorMessage := ""
if len(version) > 1 {
release, resp, err = client.Repositories.GetReleaseByTag("openshift", "origin", version)
errorMessage = fmt.Sprintf("Cannot get the OpenShift release version %s", version)
} else {
release, resp, err = client.Repositories.GetLatestRelease("openshift", "origin")
errorMessage = "Cannot get the latest OpenShift release."
}
if err != nil {
return errors.Wrap(err, errorMessage)
}
defer func() { _ = resp.Body.Close() }()
// Get asset id and filename based on the method parameters
assetID, assetFilename := getAssetIdAndFilename(binaryType, osType, release)
if assetID == 0 {
return errors.New(fmt.Sprintf("Cannot get binary '%s' in version %s for the target environment %s",
binaryType.String(), version, strings.Title(osType.String())))
}
// Download the asset
var asset io.Reader
asset, url, err := client.Repositories.DownloadReleaseAsset("openshift", "origin", assetID)
if err != nil {
return errors.Wrap(err, fmt.Sprintf("Cannot download OpenShift release asset %d", assetID))
}
if len(url) > 0 {
fmt.Println(fmt.Sprintf("-- Downloading OpenShift binary '%s' version '%s'", binaryType.String(), *release.TagName))
httpResp, err := http.Get(url)
if err != nil {
return errors.Wrap(err, "Cannot download OpenShift release asset.")
}
defer func() { _ = httpResp.Body.Close() }()
asset = httpResp.Body
if httpResp.ContentLength > 0 {
bar := pb.New64(httpResp.ContentLength).SetUnits(pb.U_BYTES)
bar.Start()
asset = bar.NewProxyReader(asset)
defer func() {
<-time.After(bar.RefreshRate)
fmt.Println()
}()
}
}
hasher := sha256.New()
asset = io.TeeReader(asset, hasher)
// Create target directory and file
tmpDir, err := ioutil.TempDir("", "minishift-asset-download-")
if err != nil {
return errors.Wrap(err, "Cannot create temporary download directory.")
}
defer os.RemoveAll(tmpDir)
// Create a tmp directory for the asset
assetTmpFile := filepath.Join(tmpDir, assetFilename)
out, err := os.Create(assetTmpFile)
defer out.Close()
if err != nil {
return errors.Wrapf(err, "Cannot create file '%s'", assetTmpFile)
}
// Copy the asset and verify its hash
_, err = io.Copy(out, asset)
if err != nil {
return errors.Wrapf(err, "Unexpected error occurred while copying '%s' to '%s'", assetTmpFile, tmpDir)
}
err = out.Sync()
if err != nil {
return errors.Wrapf(err, "Unexpected error occurred while copying '%s' to '%s'", assetTmpFile, tmpDir)
}
// Hash verification for download oc binary
hash := hex.EncodeToString(hasher.Sum(nil))
downloadedHash, err := downloadHash(release, assetFilename)
if err != nil {
return errors.Wrap(err, "Failed to download hash")
}
if len(downloadedHash) == 0 {
return errors.New("File has no hash to validate - not downloading")
}
if hash != downloadedHash {
return errors.Errorf("Failed to validate hash - expected: %s, actual: %s", hash, downloadedHash)
}
// Unpack the asset
binaryPath := ""
switch {
case strings.HasSuffix(assetTmpFile, TAR):
// unzip
tarFile := assetTmpFile[:len(assetTmpFile)-3]
err = archive.Ungzip(assetTmpFile, tarFile)
if err != nil {
return errors.Wrapf(err, "Cannot ungzip '%s'", assetTmpFile)
}
// untar
err = archive.Untar(tarFile, tmpDir)
if err != nil {
return errors.Wrapf(err, "Cannot untar '%s'", tarFile)
}
content, err := listDirExcluding(tmpDir, ".*.tar.*")
if err != nil {
return errors.Wrapf(err, "Cannot list content of '%s'", tmpDir)
}
if len(content) > 1 {
return errors.New(fmt.Sprintf("Unexpected number of files in tmp directory: %s", content))
}
binaryPath = filepath.Join(tmpDir, content[0])
case strings.HasSuffix(assetTmpFile, ZIP):
contentDir := assetTmpFile[:len(assetTmpFile)-4]
err = archive.Unzip(assetTmpFile, contentDir)
if err != nil {
return errors.Wrapf(err, "Cannot unzip '%s'", assetTmpFile)
}
binaryPath = contentDir
}
binaryName := binaryType.String()
if osType == minishiftos.WINDOWS {
binaryName = binaryName + ".exe"
}
binaryPath = filepath.Join(binaryPath, binaryName)
// Copy the requested asset into its final destination
err = os.MkdirAll(outputPath, 0755)
if err != nil && !os.IsExist(err) {
return errors.Wrap(err, "Cannot create the target directory.")
}
finalBinaryPath := filepath.Join(outputPath, binaryName)
copy(binaryPath, finalBinaryPath)
if err != nil {
return err
}
err = os.Chmod(finalBinaryPath, 0777)
if err != nil {
return errors.Wrapf(err, "Cannot make '%s' executable", finalBinaryPath)
}
return nil
}
func listDirExcluding(dir string, excludeRegexp string) ([]string, error) {
files, err := ioutil.ReadDir(dir)
if err != nil {
return nil, err
}
result := []string{}
for _, f := range files {
matched, err := regexp.MatchString(excludeRegexp, f.Name())
if err != nil {
return nil, err
}
if !matched {
result = append(result, f.Name())
}
}
return result, nil
}
func getAssetIdAndFilename(binaryType OpenShiftBinaryType, osType minishiftos.OS, release *github.RepositoryRelease) (int, string) {
prefix := ""
switch binaryType {
case OC:
prefix = "openshift-origin-client-tools"
case OPENSHIFT:
prefix = "openshift-origin-server"
default:
errors.New("Unexpected binary type")
}
suffix := ""
switch osType {
case minishiftos.LINUX:
suffix = "linux-64bit.tar.gz"
case minishiftos.DARWIN:
suffix = "mac.zip"
case minishiftos.WINDOWS:
suffix = "windows.zip"
default:
errors.New("Unexpected OS type")
}
for _, asset := range release.Assets {
if strings.HasPrefix(*asset.Name, prefix) && strings.HasSuffix(*asset.Name, suffix) {
return *asset.ID, *asset.Name
}
}
return 0, ""
}
func downloadHash(release *github.RepositoryRelease, filename string) (string, error) {
checksumAssetID := getOpenShiftChecksumAssetID(release)
if checksumAssetID == 0 {
return "", errors.New("Cannot get the OpenShift release checksum URL.")
}
var asset io.Reader
asset, url, err := client.Repositories.DownloadReleaseAsset("openshift", "origin", checksumAssetID)
if err != nil {
return "", errors.Wrap(err, "Cannot download the OpenShift release checksum asset.")
}
if len(url) > 0 {
fmt.Printf("-- Downloading OpenShift %s checksums ... ", *release.TagName)
httpResp, err := http.Get(url)
if err != nil {
return "", errors.Wrap(err, "Cannot download the OpenShift release checksum asset.")
}
defer func() { _ = httpResp.Body.Close() }()
asset = httpResp.Body
}
scanner := bufio.NewScanner(asset)
for scanner.Scan() {
spl := strings.Fields(scanner.Text())
if len(spl) == 2 && strings.Contains(spl[1], filename) {
fmt.Printf("OK")
return spl[0], nil
}
}
return "", nil
}
func getOpenShiftChecksumAssetID(release *github.RepositoryRelease) int {
for _, asset := range release.Assets {
if *asset.Name == "CHECKSUM" {
return *asset.ID
}
}
return 0
}
func copy(src, dest string) error {
glog.V(2).Infof("Copying '%s' to '%s'\n", src, dest)
srcFile, err := os.Open(src)
defer srcFile.Close()
if err != nil {
return errors.Wrapf(err, "Cannot open src file '%s'", src)
}
destFile, err := os.Create(dest)
defer destFile.Close()
if err != nil {
return errors.Wrapf(err, "Cannot create dst file '%s'", dest)
}
_, err = io.Copy(destFile, srcFile)
if err != nil {
return errors.Wrapf(err, "Cannot copy '%s' to '%s'", src, dest)
}
err = destFile.Sync()
if err != nil {
return errors.Wrapf(err, "Cannot copy '%s' to '%s'", src, dest)
}
return nil
}