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|
package helpers
import (
"context"
"io"
"io/ioutil"
"net/http"
"os"
"path/filepath"
"strconv"
"time"
"github.com/sirupsen/logrus"
"github.com/urfave/cli"
"gitlab.com/gitlab-org/gitlab-runner/commands/helpers/archive"
"gitlab.com/gitlab-org/gitlab-runner/commands/helpers/meter"
"gitlab.com/gitlab-org/gitlab-runner/common"
url_helpers "gitlab.com/gitlab-org/gitlab-runner/helpers/url"
"gitlab.com/gitlab-org/gitlab-runner/log"
)
type CacheExtractorCommand struct {
retryHelper
meter.TransferMeterCommand
File string `long:"file" description:"The file containing your cache artifacts"`
URL string `long:"url" description:"URL of remote cache resource"`
Timeout int `long:"timeout" description:"Overall timeout for cache downloading request (in minutes)"`
client *CacheClient
}
func (c *CacheExtractorCommand) getClient() *CacheClient {
if c.client == nil {
c.client = NewCacheClient(c.Timeout)
}
return c.client
}
func checkIfUpToDate(path string, resp *http.Response) (bool, time.Time) {
fi, _ := os.Lstat(path)
date, _ := time.Parse(http.TimeFormat, resp.Header.Get("Last-Modified"))
return fi != nil && !date.After(fi.ModTime()), date
}
func getRemoteCacheSize(resp *http.Response) int64 {
length, _ := strconv.Atoi(resp.Header.Get("Content-Length"))
if length <= 0 {
return meter.UnknownTotalSize
}
return int64(length)
}
func (c *CacheExtractorCommand) download(_ int) error {
err := os.MkdirAll(filepath.Dir(c.File), 0700)
if err != nil {
return err
}
resp, err := c.getCache()
if err != nil {
return err
}
defer func() { _ = resp.Body.Close() }()
upToDate, date := checkIfUpToDate(c.File, resp)
if upToDate {
logrus.Infoln(filepath.Base(c.File), "is up to date")
return nil
}
file, err := ioutil.TempFile(filepath.Dir(c.File), "cache")
if err != nil {
return err
}
defer func() {
_ = file.Close()
_ = os.Remove(file.Name())
}()
logrus.Infoln("Downloading", filepath.Base(c.File), "from", url_helpers.CleanURL(c.URL))
writer := meter.NewWriter(
file,
c.TransferMeterFrequency,
meter.LabelledRateFormat(os.Stdout, "Downloading cache", getRemoteCacheSize(resp)),
)
// Close() is checked properly bellow, where the file handling is being finalized
defer func() { _ = writer.Close() }()
_, err = io.Copy(writer, resp.Body)
if err != nil {
return retryableErr{err: err}
}
err = os.Chtimes(file.Name(), time.Now(), date)
if err != nil {
return err
}
err = writer.Close()
if err != nil {
return err
}
err = os.Rename(file.Name(), c.File)
if err != nil {
return err
}
return nil
}
func (c *CacheExtractorCommand) getCache() (*http.Response, error) {
resp, err := c.getClient().Get(c.URL)
if err != nil {
return nil, retryableErr{err: err}
}
if resp.StatusCode == http.StatusNotFound {
_ = resp.Body.Close()
return nil, os.ErrNotExist
}
return resp, retryOnServerError(resp)
}
func (c *CacheExtractorCommand) Execute(cliContext *cli.Context) {
log.SetRunnerFormatter()
wd, err := os.Getwd()
if err != nil {
logrus.Fatalln("Unable to get working directory")
}
if c.File == "" {
warningln("Missing cache file")
}
if c.URL != "" {
err := c.doRetry(c.download)
if err != nil {
warningln(err)
}
} else {
logrus.Infoln(
"No URL provided, cache will not be downloaded from shared cache server. " +
"Instead a local version of cache will be extracted.")
}
f, size, err := openZip(c.File)
if os.IsNotExist(err) {
return
}
if err != nil {
logrus.Fatalln(err)
}
defer f.Close()
extractor, err := archive.NewExtractor(archive.Zip, f, size, wd)
if err != nil {
logrus.Fatalln(err)
}
err = extractor.Extract(context.Background())
if err != nil {
logrus.Fatalln(err)
}
}
func warningln(args interface{}) {
logrus.Warningln(args)
logrus.Exit(1)
}
func init() {
common.RegisterCommand2(
"cache-extractor",
"download and extract cache artifacts (internal)",
&CacheExtractorCommand{
retryHelper: retryHelper{
Retry: 2,
RetryTime: time.Second,
},
},
)
}
|
