terraform/command/version.go

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package command
import (
"bytes"
"fmt"
"sort"
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)
// VersionCommand is a Command implementation prints the version.
type VersionCommand struct {
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Meta
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Revision string
Version string
VersionPrerelease string
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CheckFunc VersionCheckFunc
}
// VersionCheckFunc is the callback called by the Version command to
// check if there is a new version of Terraform.
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 Terraform.
type VersionCheckInfo struct {
Outdated bool
Latest string
Alerts []string
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}
func (c *VersionCommand) Help() string {
return ""
}
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func (c *VersionCommand) Run(args []string) int {
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var versionString bytes.Buffer
args = c.Meta.process(args)
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fmt.Fprintf(&versionString, "Terraform v%s", c.Version)
if c.VersionPrerelease != "" {
fmt.Fprintf(&versionString, "-%s", c.VersionPrerelease)
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if c.Revision != "" {
fmt.Fprintf(&versionString, " (%s)", c.Revision)
}
}
c.Ui.Output(versionString.String())
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// We'll also attempt to print out the selected plugin versions. We can
// do this only if "terraform init" was already run and thus we've committed
// to a specific set of plugins. If not, the plugins lock will be empty
// and so we'll show _no_ providers.
//
// Generally-speaking this is a best-effort thing that will give us a good
// result in the usual case where the user successfully ran "terraform init"
// and then hit a problem running _another_ command.
providerInstaller := c.providerInstaller()
providerSelections, err := providerInstaller.SelectedPackages()
var pluginVersions []string
if err != nil {
// we'll just ignore it and show no plugins at all, then.
providerSelections = nil
}
for providerAddr, cached := range providerSelections {
version := cached.Version.String()
if version == "0.0.0" {
pluginVersions = append(pluginVersions, fmt.Sprintf("+ provider %s (unversioned)", providerAddr))
} else {
pluginVersions = append(pluginVersions, fmt.Sprintf("+ provider %s v%s", providerAddr, version))
}
}
if len(pluginVersions) != 0 {
sort.Strings(pluginVersions)
for _, str := range pluginVersions {
c.Ui.Output(str)
}
}
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// 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))
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}
if info.Outdated {
c.Ui.Output(fmt.Sprintf(
"\nYour version of Terraform is out of date! The latest version\n"+
"is %s. You can update by downloading from https://www.terraform.io/downloads.html",
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info.Latest))
}
}
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return 0
}
func (c *VersionCommand) Synopsis() string {
return "Prints the Terraform version"
}