94 lines
2.4 KiB
Go
94 lines
2.4 KiB
Go
package packer
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import (
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"bytes"
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"fmt"
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)
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// The git commit that is being compiled. This will be filled in by the
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// compiler for source builds.
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var GitCommit string
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// This should be check to a callback to check for the latest version.
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//
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// The global nature of this variable is dirty, but a version checker
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// really shouldn't change anyways.
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var VersionChecker VersionCheckFunc
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// The version of packer.
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const Version = "0.7.1"
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// Any pre-release marker for the version. If this is "" (empty string),
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// then it means that it is a final release. Otherwise, this is the
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// pre-release marker.
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const VersionPrerelease = ""
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// VersionCheckFunc is the callback that is called to check the latest
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// version of Packer.
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type VersionCheckFunc func(string) (VersionCheckInfo, error)
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// VersionCheckInfo is the return value for the VersionCheckFunc that
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// contains the latest version information.
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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Outdated bool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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type versionCommand byte
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func (versionCommand) Help() string {
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return `usage: packer version
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Outputs the version of Packer that is running. There are no additional
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command-line flags for this command.`
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}
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func (versionCommand) Run(env Environment, args []string) int {
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env.Ui().Machine("version", Version)
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env.Ui().Machine("version-prelease", VersionPrerelease)
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env.Ui().Machine("version-commit", GitCommit)
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env.Ui().Say(VersionString())
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if VersionChecker != nil {
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current := Version
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if VersionPrerelease != "" {
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current += fmt.Sprintf(".%s", VersionPrerelease)
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}
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info, err := VersionChecker(current)
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if err != nil {
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env.Ui().Say(fmt.Sprintf("\nError checking latest version: %s", err))
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}
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if info.Outdated {
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env.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 (versionCommand) Synopsis() string {
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return "print Packer version"
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}
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// VersionString returns the Packer version in human-readable
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// form complete with pre-release and git commit info if it is
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// available.
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func VersionString() string {
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var versionString bytes.Buffer
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fmt.Fprintf(&versionString, "Packer v%s", Version)
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if VersionPrerelease != "" {
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fmt.Fprintf(&versionString, ".%s", VersionPrerelease)
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if GitCommit != "" {
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fmt.Fprintf(&versionString, " (%s)", GitCommit)
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}
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}
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return versionString.String()
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}
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