terraform/command/init.go

170 lines
4.5 KiB
Go

package command
import (
"flag"
"fmt"
"os"
"path/filepath"
"strings"
"github.com/hashicorp/go-getter"
"github.com/hashicorp/terraform/config"
"github.com/hashicorp/terraform/config/module"
"github.com/hashicorp/terraform/terraform"
)
// 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 {
var remoteBackend string
args = c.Meta.process(args, false)
remoteConfig := make(map[string]string)
cmdFlags := flag.NewFlagSet("init", flag.ContinueOnError)
cmdFlags.StringVar(&remoteBackend, "backend", "", "")
cmdFlags.Var((*FlagKV)(&remoteConfig), "backend-config", "config")
cmdFlags.Usage = func() { c.Ui.Error(c.Help()) }
if err := cmdFlags.Parse(args); err != nil {
return 1
}
remoteBackend = strings.ToLower(remoteBackend)
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))
}
}
// Set the state out path to be the path requested for the module
// to be copied. This ensures any remote states gets setup in the
// proper directory.
c.Meta.dataDir = filepath.Join(path, DefaultDataDir)
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 = getter.Detect(source, pwd, getter.Detectors)
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
}
// Handle remote state if configured
if remoteBackend != "" {
var remoteConf terraform.RemoteState
remoteConf.Type = remoteBackend
remoteConf.Config = remoteConfig
state, err := c.State()
if err != nil {
c.Ui.Error(fmt.Sprintf("Error checking for state: %s", err))
return 1
}
if state != nil {
s := state.State()
if !s.Empty() {
c.Ui.Error(fmt.Sprintf(
"State file already exists and is not empty! Please remove this\n" +
"state file before initializing. Note that removing the state file\n" +
"may result in a loss of information since Terraform uses this\n" +
"to track your infrastructure."))
return 1
}
if s.IsRemote() {
c.Ui.Error(fmt.Sprintf(
"State file already exists with remote state enabled! Please remove this\n" +
"state file before initializing. Note that removing the state file\n" +
"may result in a loss of information since Terraform uses this\n" +
"to track your infrastructure."))
return 1
}
}
// Initialize a blank state file with remote enabled
remoteCmd := &RemoteConfigCommand{
Meta: c.Meta,
remoteConf: remoteConf,
}
return remoteCmd.initBlankState()
}
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.
Options:
-backend=atlas Specifies the type of remote backend. If not
specified, local storage will be used.
-backend-config="k=v" Specifies configuration for the remote storage
backend. This can be specified multiple times.
-no-color If specified, output won't contain any color.
`
return strings.TrimSpace(helpText)
}
func (c *InitCommand) Synopsis() string {
return "Initializes Terraform configuration from a module"
}