Added verify command

.gitignore

@@ -21,3 +21,4 @@ website/node_modules
 .*.swp
 .idea
 *.test
+*.iml

command/test-fixtures/verify-invalid/main.tf

@@ -0,0 +1,9 @@
+resource "test_instance" "foo" {
+    ami = "bar"
+
+    # This is here because at some point it caused a test failure
+    network_interface {
+      device_index = 0
+      description = "Main network interface ${var.this_is_an_error}"
+    }
+}

command/test-fixtures/verify-valid/main.tf

@@ -0,0 +1,9 @@
+resource "test_instance" "foo" {
+    ami = "bar"
+
+    # This is here because at some point it caused a test failure
+    network_interface {
+      device_index = 0
+      description = "Main network interface"
+    }
+}

command/verify.go

@@ -0,0 +1,58 @@
+package command
+
+import (
+	"fmt"
+	"github.com/hashicorp/terraform/config"
+	"path/filepath"
+)
+
+// VerifyCommand is a Command implementation that verifies the terraform files
+type VerifyCommand struct {
+	Meta
+}
+
+const defaultPath = "."
+
+func (c *VerifyCommand) Help() string {
+	return ""
+}
+
+func (c *VerifyCommand) Run(args []string) int {
+	args = c.Meta.process(args, false)
+	var dirPath string
+
+	if len(args) == 1 {
+		dirPath = args[0]
+	} else {
+		dirPath = "."
+	}
+	dir, err := filepath.Abs(dirPath)
+	if err != nil {
+		c.Ui.Error(fmt.Sprintf(
+			"Unable to locate directory %v\n", err.Error()))
+	}
+
+	rtnCode := c.validate(dir)
+
+	return rtnCode
+}
+
+func (c *VerifyCommand) Synopsis() string {
+	return "Validates the Terraform files"
+}
+
+func (c *VerifyCommand) validate(dir string) int {
+	cfg, err := config.LoadDir(dir)
+	if err != nil {
+		c.Ui.Error(fmt.Sprintf(
+			"Error loading files %v\n", err.Error()))
+		return 1
+	}
+	err = cfg.Validate()
+	if err != nil {
+		c.Ui.Error(fmt.Sprintf(
+			"Error validating: %v\n", err.Error()))
+		return 1
+	}
+	return 0
+}

command/verify_test.go

@@ -0,0 +1,40 @@
+package command
+
+import (
+	"github.com/mitchellh/cli"
+	"testing"
+)
+
+func TestVerifyCommand(t *testing.T) {
+	ui := new(cli.MockUi)
+	c := &VerifyCommand{
+		Meta: Meta{
+			Ui: ui,
+		},
+	}
+
+	args := []string{
+		testFixturePath("verify-valid"),
+	}
+
+	if code := c.Run(args); code != 0 {
+		t.Fatalf("bad: %d\n\n%s", code, ui.ErrorWriter.String())
+	}
+}
+
+func TestVerifyFailingCommand(t *testing.T) {
+	ui := new(cli.MockUi)
+	c := &VerifyCommand{
+		Meta: Meta{
+			Ui: ui,
+		},
+	}
+
+	args := []string{
+		testFixturePath("verify-invalid"),
+	}
+
+	if code := c.Run(args); code == 0 {
+		t.Fatalf("Should have failed: %d\n\n%s", code, ui.ErrorWriter.String())
+	}
+}

commands.go

@@ -110,6 +110,12 @@ func init() {
 			}, nil
 		},
 
+		"verify": func() (cli.Command, error) {
+			return &command.VerifyCommand{
+				Meta: meta,
+			}, nil
+		},
+
 		"version": func() (cli.Command, error) {
 			return &command.VersionCommand{
 				Meta:              meta,

website/source/docs/commands/verify.html.markdown

@@ -0,0 +1,20 @@
+---
+layout: "docs"
+page_title: "Command: verify"
+sidebar_current: "docs-commands-verify"
+description: |-
+  The `terraform verify` command is used to validate the format and structure of the terraform files.
+---
+
+# Command: verify
+
+The `terraform verify` command is used to validate the format and structure of the terraform files.
+Terraform performas an analysis of the terraform files, and will display information about missing
+ variables and errors in the structure of the files.
+
+## Usage
+
+Usage: `terraform verify [dir]`
+
+By default, `verify` requires no flags and looks in the current directory
+for the configurations.