command: init command start

command/init.go

@@ -0,0 +1,102 @@
+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"
+}

command/init_test.go

@@ -0,0 +1,67 @@
+package command
+
+import (
+	"testing"
+
+	"github.com/mitchellh/cli"
+)
+
+/*
+func TestGet(t *testing.T) {
+	ui := new(cli.MockUi)
+	c := &GetCommand{
+		Meta: Meta{
+			ContextOpts: testCtxConfig(testProvider()),
+			Ui:          ui,
+		},
+	}
+
+	args := []string{
+		testFixturePath("get"),
+	}
+	if code := c.Run(args); code != 0 {
+		t.Fatalf("bad: \n%s", ui.ErrorWriter.String())
+	}
+
+	output := ui.OutputWriter.String()
+	if !strings.Contains(output, "Get: file://") {
+		t.Fatalf("doesn't look like get: %s", output)
+	}
+	if strings.Contains(output, "(update)") {
+		t.Fatalf("doesn't look like get: %s", output)
+	}
+}
+*/
+
+func TestInit_multipleArgs(t *testing.T) {
+	ui := new(cli.MockUi)
+	c := &InitCommand{
+		Meta: Meta{
+			ContextOpts: testCtxConfig(testProvider()),
+			Ui:          ui,
+		},
+	}
+
+	args := []string{
+		"bad",
+		"bad",
+	}
+	if code := c.Run(args); code != 1 {
+		t.Fatalf("bad: \n%s", ui.OutputWriter.String())
+	}
+}
+
+func TestInit_noArgs(t *testing.T) {
+	ui := new(cli.MockUi)
+	c := &InitCommand{
+		Meta: Meta{
+			ContextOpts: testCtxConfig(testProvider()),
+			Ui:          ui,
+		},
+	}
+
+	args := []string{}
+	if code := c.Run(args); code != 1 {
+		t.Fatalf("bad: \n%s", ui.OutputWriter.String())
+	}
+}