package command import ( "flag" "fmt" "os" "strings" "github.com/hashicorp/terraform/config" "github.com/hashicorp/terraform/config/module" ) // InitCommand is a Command implementation that takes a Terraform // module and clones it to the working directory. type InitCommand struct { Meta } func (c *InitCommand) Run(args []string) int { args = c.Meta.process(args, false) cmdFlags := flag.NewFlagSet("init", flag.ContinueOnError) cmdFlags.Usage = func() { c.Ui.Error(c.Help()) } if err := cmdFlags.Parse(args); err != nil { return 1 } var path string args = cmdFlags.Args() if len(args) > 2 { c.Ui.Error("The init command expects at most two arguments.\n") cmdFlags.Usage() return 1 } else if len(args) < 1 { c.Ui.Error("The init command expects at least one arguments.\n") cmdFlags.Usage() return 1 } if len(args) == 2 { path = args[1] } else { var err error path, err = os.Getwd() if err != nil { c.Ui.Error(fmt.Sprintf("Error getting pwd: %s", err)) } } source := args[0] // Get our pwd since we need it pwd, err := os.Getwd() if err != nil { c.Ui.Error(fmt.Sprintf( "Error reading working directory: %s", err)) return 1 } // Verify the directory is empty if empty, err := config.IsEmptyDir(path); err != nil { c.Ui.Error(fmt.Sprintf( "Error checking on destination path: %s", err)) return 1 } else if !empty { c.Ui.Error( "The destination path has Terraform configuration files. The\n" + "init command can only be used on a directory without existing Terraform\n" + "files.") return 1 } // Detect source, err = module.Detect(source, pwd) if err != nil { c.Ui.Error(fmt.Sprintf( "Error with module source: %s", err)) return 1 } // Get it! if err := module.GetCopy(path, source); err != nil { c.Ui.Error(err.Error()) return 1 } return 0 } func (c *InitCommand) Help() string { helpText := ` Usage: terraform init [options] SOURCE [PATH] Downloads the module given by SOURCE into the PATH. The PATH defaults to the working directory. PATH must be empty of any Terraform files. Any conflicting non-Terraform files will be overwritten. The module downloaded is a copy. If you're downloading a module from Git, it will not preserve the Git history, it will only copy the latest files. ` return strings.TrimSpace(helpText) } func (c *InitCommand) Synopsis() string { return "Initializes Terraform configuration from a module" }