terraform/command/init.go

103 lines
2.3 KiB
Go

package command
import (
"flag"
"fmt"
"io/ioutil"
"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]
// 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
}
// Create a temporary directory to store our module
td, err := ioutil.TempDir("", "tf")
if err != nil {
c.Ui.Error(fmt.Sprintf(
"Error creating temporary directory: %s", err))
return 1
}
defer os.RemoveAll(td)
// Get it!
if err := module.Get(td, 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"
}