packer-cn/command/version.go

64 lines
1.6 KiB
Go

package command
import (
"fmt"
"github.com/hashicorp/packer/version"
)
// VersionCommand is a Command implementation prints the version.
type VersionCommand struct {
Meta
CheckFunc VersionCheckFunc
}
// VersionCheckFunc is the callback called by the Version command to
// check if there is a new version of Packer.
type VersionCheckFunc func() (VersionCheckInfo, error)
// VersionCheckInfo is the return value for the VersionCheckFunc callback
// and tells the Version command information about the latest version
// of Packer.
type VersionCheckInfo struct {
Outdated bool
Latest string
Alerts []string
}
func (c *VersionCommand) Help() string {
return "Prints the Packer version, and checks for new release."
}
func (c *VersionCommand) Run(args []string) int {
c.Ui.Machine("version", version.Version)
c.Ui.Machine("version-prelease", version.VersionPrerelease)
c.Ui.Machine("version-commit", version.GitCommit)
c.Ui.Say(fmt.Sprintf("Packer v%s", version.FormattedVersion()))
// If we have a version check function, then let's check for
// the latest version as well.
if c.CheckFunc != nil {
// Check the latest version
info, err := c.CheckFunc()
if err != nil {
c.Ui.Error(fmt.Sprintf(
"\nError checking latest version: %s", err))
}
if info.Outdated {
c.Ui.Say(fmt.Sprintf(
"\nYour version of Packer is out of date! The latest version\n"+
"is %s. You can update by downloading from www.packer.io/downloads.html",
info.Latest))
}
}
return 0
}
func (c *VersionCommand) Synopsis() string {
return "Prints the Packer version"
}