From 2d849f8650a9bfa484a07136cfae3c80b294527e Mon Sep 17 00:00:00 2001
From: Sunny <me@darkowlzz.space>
Date: Mon, 28 Aug 2017 23:55:16 +0530
Subject: [PATCH] command/init: check required_version

Previously we were checking required_version only during "real" operations, and not during initialization. Catching it during init is better because that's the first command users run on a new working directory.
---
 command/init.go                               |  5 +++++
 command/init_test.go                          | 21 +++++++++++++++++++
 .../init-check-required-version/main.tf       |  3 +++
 terraform/context.go                          |  2 +-
 terraform/version_required.go                 |  6 +++---
 5 files changed, 33 insertions(+), 4 deletions(-)
 create mode 100644 command/test-fixtures/init-check-required-version/main.tf

diff --git a/command/init.go b/command/init.go
index 3665b5b1d7..2de7d701d9 100644
--- a/command/init.go
+++ b/command/init.go
@@ -288,6 +288,11 @@ func (c *InitCommand) getProviders(path string, state *terraform.State, upgrade
 		return err
 	}
 
+	if err := terraform.CheckRequiredVersion(mod); err != nil {
+		c.Ui.Error(err.Error())
+		return err
+	}
+
 	var available discovery.PluginMetaSet
 	if upgrade {
 		// If we're in upgrade mode, we ignore any auto-installed plugins
diff --git a/command/init_test.go b/command/init_test.go
index ef192b7e54..8b013bdaec 100644
--- a/command/init_test.go
+++ b/command/init_test.go
@@ -855,6 +855,27 @@ func TestInit_getProviderHaveLegacyVersion(t *testing.T) {
 	}
 }
 
+func TestInit_getProviderCheckRequiredVersion(t *testing.T) {
+	// Create a temporary working directory that is empty
+	td := tempDir(t)
+	copy.CopyDir(testFixturePath("init-check-required-version"), td)
+	defer os.RemoveAll(td)
+	defer testChdir(t, td)()
+
+	ui := new(cli.MockUi)
+	c := &InitCommand{
+		Meta: Meta{
+			testingOverrides: metaOverridesForProvider(testProvider()),
+			Ui:               ui,
+		},
+	}
+
+	args := []string{}
+	if code := c.Run(args); code != 1 {
+		t.Fatalf("bad: \n%s", ui.ErrorWriter.String())
+	}
+}
+
 func TestInit_providerLockFile(t *testing.T) {
 	// Create a temporary working directory that is empty
 	td := tempDir(t)
diff --git a/command/test-fixtures/init-check-required-version/main.tf b/command/test-fixtures/init-check-required-version/main.tf
new file mode 100644
index 0000000000..8f65421946
--- /dev/null
+++ b/command/test-fixtures/init-check-required-version/main.tf
@@ -0,0 +1,3 @@
+terraform {
+    required_version = "~> 0.9.0"
+}
diff --git a/terraform/context.go b/terraform/context.go
index aaa77abf96..28ca14cbf4 100644
--- a/terraform/context.go
+++ b/terraform/context.go
@@ -122,7 +122,7 @@ type Context struct {
 func NewContext(opts *ContextOpts) (*Context, error) {
 	// Validate the version requirement if it is given
 	if opts.Module != nil {
-		if err := checkRequiredVersion(opts.Module); err != nil {
+		if err := CheckRequiredVersion(opts.Module); err != nil {
 			return nil, err
 		}
 	}
diff --git a/terraform/version_required.go b/terraform/version_required.go
index 3cbbf56085..723ec39632 100644
--- a/terraform/version_required.go
+++ b/terraform/version_required.go
@@ -8,17 +8,17 @@ import (
 	"github.com/hashicorp/terraform/config/module"
 )
 
-// checkRequiredVersion verifies that any version requirements specified by
+// CheckRequiredVersion verifies that any version requirements specified by
 // the configuration are met.
 //
 // This checks the root module as well as any additional version requirements
 // from child modules.
 //
 // This is tested in context_test.go.
-func checkRequiredVersion(m *module.Tree) error {
+func CheckRequiredVersion(m *module.Tree) error {
 	// Check any children
 	for _, c := range m.Children() {
-		if err := checkRequiredVersion(c); err != nil {
+		if err := CheckRequiredVersion(c); err != nil {
 			return err
 		}
 	}