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Outdated bool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