github.com/ticketmaster/terraform@v0.10.0-beta2.0.20170711045249-a12daf5aba4f/command/version.go (about) 1 package command 2 3 import ( 4 "bytes" 5 "fmt" 6 ) 7 8 // VersionCommand is a Command implementation prints the version. 9 type VersionCommand struct { 10 Meta 11 12 Revision string 13 Version string 14 VersionPrerelease string 15 CheckFunc VersionCheckFunc 16 } 17 18 // VersionCheckFunc is the callback called by the Version command to 19 // check if there is a new version of Terraform. 20 type VersionCheckFunc func() (VersionCheckInfo, error) 21 22 // VersionCheckInfo is the return value for the VersionCheckFunc callback 23 // and tells the Version command information about the latest version 24 // of Terraform. 25 type VersionCheckInfo struct { 26 Outdated bool 27 Latest string 28 Alerts []string 29 } 30 31 func (c *VersionCommand) Help() string { 32 return "" 33 } 34 35 func (c *VersionCommand) Run(args []string) int { 36 var versionString bytes.Buffer 37 args, err := c.Meta.process(args, false) 38 if err != nil { 39 return 1 40 } 41 42 fmt.Fprintf(&versionString, "Terraform v%s", c.Version) 43 if c.VersionPrerelease != "" { 44 fmt.Fprintf(&versionString, "-%s", c.VersionPrerelease) 45 46 if c.Revision != "" { 47 fmt.Fprintf(&versionString, " (%s)", c.Revision) 48 } 49 } 50 51 c.Ui.Output(versionString.String()) 52 53 // If we have a version check function, then let's check for 54 // the latest version as well. 55 if c.CheckFunc != nil { 56 // Separate the prior output with a newline 57 c.Ui.Output("") 58 59 // Check the latest version 60 info, err := c.CheckFunc() 61 if err != nil { 62 c.Ui.Error(fmt.Sprintf( 63 "Error checking latest version: %s", err)) 64 } 65 if info.Outdated { 66 c.Ui.Output(fmt.Sprintf( 67 "Your version of Terraform is out of date! The latest version\n"+ 68 "is %s. You can update by downloading from www.terraform.io", 69 info.Latest)) 70 } 71 } 72 73 return 0 74 } 75 76 func (c *VersionCommand) Synopsis() string { 77 return "Prints the Terraform version" 78 }