From 86fbcfac83a82bc758874d100c860322bfb21f5b Mon Sep 17 00:00:00 2001
From: Radek Simko <radek.simko@gmail.com>
Date: Sat, 10 Jun 2017 11:04:44 +0100
Subject: [PATCH 1/3] command/providers: Avoid crash when no configs found

---
 command/providers.go | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/command/providers.go b/command/providers.go
index 3c1d14433..aeae44b15 100644
--- a/command/providers.go
+++ b/command/providers.go
@@ -43,6 +43,13 @@ func (c *ProvidersCommand) Run(args []string) int {
 		c.Ui.Error(fmt.Sprintf("Failed to load root config module: %s", err))
 		return 1
 	}
+	if root == nil {
+		c.Ui.Error(fmt.Sprintf(
+			"No configuration files found in the directory: %s\n\n"+
+				"This command requires configuration to run.",
+			configPath))
+		return 1
+	}
 
 	// Validate the config (to ensure the version constraints are valid)
 	err = root.Validate()

From ee30df3efd0515696f2417a2dc680520c510fc82 Mon Sep 17 00:00:00 2001
From: Radek Simko <radek.simko@gmail.com>
Date: Sat, 10 Jun 2017 11:49:57 +0100
Subject: [PATCH 2/3] command/providers: Enable processing of meta-parameters

This will enable proper colouring of the output, like for other commands.
---
 command/providers.go | 1 +
 1 file changed, 1 insertion(+)

diff --git a/command/providers.go b/command/providers.go
index aeae44b15..2a755f126 100644
--- a/command/providers.go
+++ b/command/providers.go
@@ -24,6 +24,7 @@ func (c *ProvidersCommand) Synopsis() string {
 }
 
 func (c *ProvidersCommand) Run(args []string) int {
+	c.Meta.process(args, false)
 
 	cmdFlags := c.Meta.flagSet("providers")
 	cmdFlags.Usage = func() { c.Ui.Error(c.Help()) }

From f5ff67c5302887f3f8b3c194ae92809ee6eaaa87 Mon Sep 17 00:00:00 2001
From: Radek Simko <radek.simko@gmail.com>
Date: Sat, 10 Jun 2017 12:02:01 +0100
Subject: [PATCH 3/3] command/providers: Add regression test

---
 command/providers_test.go | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/command/providers_test.go b/command/providers_test.go
index eb6c0dfc2..163cae129 100644
--- a/command/providers_test.go
+++ b/command/providers_test.go
@@ -41,3 +41,33 @@ func TestProviders(t *testing.T) {
 		t.Errorf("output missing provider.baz\n\n%s", output)
 	}
 }
+
+func TestProviders_noConfigs(t *testing.T) {
+	cwd, err := os.Getwd()
+	if err != nil {
+		t.Fatalf("err: %s", err)
+	}
+	if err := os.Chdir(testFixturePath("")); err != nil {
+		t.Fatalf("err: %s", err)
+	}
+	defer os.Chdir(cwd)
+
+	ui := new(cli.MockUi)
+	c := &ProvidersCommand{
+		Meta: Meta{
+			Ui: ui,
+		},
+	}
+
+	args := []string{}
+	if code := c.Run(args); code == 0 {
+		t.Fatal("expected command to return non-zero exit code" +
+			" when no configs are available")
+	}
+
+	output := ui.ErrorWriter.String()
+	expectedErrMsg := "No configuration files found"
+	if !strings.Contains(output, expectedErrMsg) {
+		t.Errorf("Expected error message: %s\nGiven output: %s", expectedErrMsg, output)
+	}
+}