func Rollback(rollback int, deploy_config setup.DeployConfiguration, commands setup.CommandConfig) {
/* remove the current directory, and switch back to version current - number
*/
connection, err := NewConnection(deploy_config.TargetHost, deploy_config.TargetPort, deploy_config.Username, deploy_config.Password, deploy_config.PublicKeyPath)
if err != nil {
log.Panic(err)
}
sftp, err := sftp.NewClient(connection)
if err != nil {
log.Fatal(err)
}
defer sftp.Close()
var build_list []string
w, err := sftp.ReadDir(deploy_config.TargetDirectory)
for _, folder := range w {
if folder.Name() == "current" || !folder.IsDir() {
continue
}
build_list = append(build_list, folder.Name())
}
sort.Sort(ByDate(build_list))
rollback_version := build_list[len(build_list)-rollback] //list is ordered old to new, so we want to index in relation to the end of the list.
//Create a symbolic link to the new directory.
cmd := fmt.Sprintf("unlink %s", deploy_config.TargetDirectory+"/current")
ExecuteCmd(connection, cmd, nil, nil)
cmd = fmt.Sprintf("ln -s -f %s %s", deploy_config.TargetDirectory+"/"+rollback_version, deploy_config.TargetDirectory+"/current")
ExecuteCmd(connection, cmd, nil, nil)
}
/*
Create a new version, remove oldest if there are more than *Rollback
return the new version number so that the deploy knows where to place shit.
*/
func create_version(deploy_config setup.DeployConfiguration) string {
connection, err := NewConnection(deploy_config.TargetHost, deploy_config.TargetPort, deploy_config.Username, deploy_config.Password, deploy_config.PublicKeyPath)
if err != nil {
log.Panic(err)
}
sftp, err := sftp.NewClient(connection)
if err != nil {
log.Fatal(err)
}
defer sftp.Close()
new_version := time.Now().Format("20060102150405")
var build_list []string
w, err := sftp.ReadDir(deploy_config.TargetDirectory)
for _, folder := range w {
if folder.Name() == "current" || !folder.IsDir() {
continue
}
build_list = append(build_list, folder.Name())
}
sort.Sort(ByDate(build_list))
//Remove oldest in build_list
if len(build_list)+1 > deploy_config.Rollbacks+1 {
remove_list := build_list[:len(build_list)-deploy_config.Rollbacks] //remove any old that exceeds Rollbaks, which are in the start of the list
for _, version := range remove_list {
log.Printf("Removing version: %s\n", deploy_config.TargetDirectory+"/"+version)
//err :=sftp.Remove(deploy_config.TargetDirectory + "/" + version)
cmd := fmt.Sprintf("rm -r %s", deploy_config.TargetDirectory+"/"+version)
err := ExecuteCmd(connection, cmd, nil, nil)
if err != nil {
log.Println(err)
}
}
}
log.Printf("Creating folder: %s\n", deploy_config.TargetDirectory+"/"+new_version)
sftp.Mkdir(deploy_config.TargetDirectory + "/" + new_version)
//Create a symbolic link to the new directory.
cmd := fmt.Sprintf("unlink %s", deploy_config.TargetDirectory+"/current")
//log.Printf("Removing old symlink: %s", cmd)
ExecuteCmd(connection, cmd, nil, nil)
cmd = fmt.Sprintf("ln -s -f %s %s", deploy_config.TargetDirectory+"/"+new_version, deploy_config.TargetDirectory+"/current")
//log.Printf("Creating symlink: %s", cmd)
ExecuteCmd(connection, cmd, nil, nil)
return new_version
}