iSharkFly-Docs
/
packer-cn
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Merge pull request #5632 from VladRassokhin/do-not-donwload-twice 

Do not re-download iso multiple times from different urls
This commit is contained in:
SwampDragons 2017-11-29 11:58:14 -08:00 committed by GitHub
parent 03f9e12d04 af8a0c46c5
commit 72afc2eab3
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 31 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
common/step_download.go
View File

@ -61,10 +61,12 @@ func (s *StepDownload) Run(state multistep.StateBag) multistep.StepAction {
ui.Say(fmt.Sprintf("Downloading or copying %s", s.Description))
var finalPath string
for _, url := range s.Url {
ui.Message(fmt.Sprintf("Downloading or copying: %s", url))
// First try to use any already downloaded file
// If it fails, proceed to regualar download logic
var downloadConfigs = make([]*DownloadConfig, len(s.Url))
var finalPath string
for i, url := range s.Url {
targetPath := s.TargetPath
if targetPath == "" {
// Determine a cache key. This is normally just the URL but
@ -90,6 +92,20 @@ func (s *StepDownload) Run(state multistep.StateBag) multistep.StepAction {
Checksum: checksum,
UserAgent: "Packer",
}
downloadConfigs[i] = config
if match, _ := NewDownloadClient(config).VerifyChecksum(config.TargetPath); match {
ui.Message(fmt.Sprintf("Found already downloaded, initial checksum matched, no download needed: %s", url))
finalPath = config.TargetPath
break
}
}
if finalPath == "" {
for i, url := range s.Url {
ui.Message(fmt.Sprintf("Downloading or copying: %s", url))
config := downloadConfigs[i]
path, err, retry := s.download(config, state)
if err != nil {
@ -105,6 +121,7 @@ func (s *StepDownload) Run(state multistep.StateBag) multistep.StepAction {
break
}
}
}
if finalPath == "" {
err := fmt.Errorf("%s download failed.", s.Description)