Added Databricks CLI config file fallback

databricks/provider.go

@@ -8,6 +8,9 @@ import (
 	"github.com/databrickslabs/databricks-terraform/client/service"
 	"github.com/hashicorp/terraform-plugin-sdk/helper/schema"
 	"github.com/hashicorp/terraform-plugin-sdk/terraform"
+
+	homedir "github.com/mitchellh/go-homedir"
+	ini "gopkg.in/ini.v1"
 )
 
 // Provider returns the entire terraform provider object
@@ -50,6 +53,24 @@ func Provider(version string) terraform.ResourceProvider {
 				Type:        schema.TypeString,
 				Optional:    true,
 				DefaultFunc: schema.EnvDefaultFunc("DATABRICKS_TOKEN", nil),
+				Description: "Personal Access Token to access the Databricks REST API.\n" +
+					"Please follow instructions at https://bit.ly/2AJXCth to set it up.",
+			},
+			"config_file": &schema.Schema{
+				Type:        schema.TypeString,
+				Optional:    true,
+				DefaultFunc: schema.EnvDefaultFunc("DATABRICKS_CONFIG_FILE", "~/.databrickscfg"),
+				Description: "Location of the Databricks CLI credentials file, that is created\n" +
+					"by `databricks configure --token` command. By default, it is located\n" +
+					"in ~/.databrickscfg. Check https://bit.ly/2XCtuZU for docs. Config\n" +
+					"file credetials will only be used when host/token are not provided.",
+			},
+			"profile": &schema.Schema{
+				Type:     schema.TypeString,
+				Optional: true,
+				Default:  "DEFAULT",
+				Description: "Connection profile specified within ~/.databrickscfg. Please check\n" +
+					"https://bit.ly/30g4zgo for documentation.",
 			},
 			"azure_auth": &schema.Schema{
 				Type:     schema.TypeMap,
@@ -197,6 +218,41 @@ func providerConfigureAzureClient(d *schema.ResourceData, providerVersion string
 	return &dbClient, nil
 }
 
+// tryDatabricksCliConfigFile sets Host and Token from ~/.databrickscfg file if it exists
+func tryDatabricksCliConfigFile(d *schema.ResourceData, config *service.DBApiClientConfig) error {
+	configFile, err := homedir.Expand(d.Get("config_file").(string))
+	if err != nil {
+		return err
+	}
+	cfg, err := ini.Load(configFile)
+	if err != nil {
+		return fmt.Errorf("Authentication is not configured for provider. Please configure it\n"+
+			"through one of the following options:\n"+
+			"1. DATABRICKS_HOST + DATABRICKS_TOKEN environment variables.\n"+
+			"2. host + token provider argumeents.\n"+
+			"3. Run `databricks configure --token` that will create %s file.\n\n"+
+			"Please check https://bit.ly/2XCtuZU for details", configFile)
+	}
+	if profile, ok := d.GetOk("profile"); ok {
+		dbcliConfig := cfg.Section(profile.(string))
+		token := dbcliConfig.Key("token").String()
+		if "" == token {
+			return fmt.Errorf("Config file %s is corrupt: cannot find token in %s profile",
+				configFile, profile)
+		}
+		config.Token = token
+
+		host := dbcliConfig.Key("host").String()
+		if "" == host {
+			return fmt.Errorf("Config file %s is corrupt: cannot find host in %s profile",
+				configFile, profile)
+		}
+		config.Host = host
+	}
+
+	return nil
+}
+
 func providerConfigure(d *schema.ResourceData, providerVersion string) (interface{}, error) {
 	var config service.DBApiClientConfig
 	// Call setup to configure retryable httpclient
@@ -209,6 +265,11 @@ func providerConfigure(d *schema.ResourceData, providerVersion string) (interfac
 		if token, ok := d.GetOk("token"); ok {
 			config.Token = token.(string)
 		}
+		if config.Host == "" || config.Token == "" {
+			if err := tryDatabricksCliConfigFile(d, &config); err != nil {
+				return nil, err
+			}
+		}
 	} else {
 		// Abstracted logic to another function that returns a interface{}, error to inject directly
 		// for the providers during cloud integration testing

databricks/provider_test.go

@@ -2,15 +2,18 @@ package databricks
 
 import (
 	"fmt"
-	"github.com/hashicorp/terraform-plugin-sdk/helper/resource"
 	"log"
 	"os"
 	"testing"
 
-	"github.com/databrickslabs/databricks-terraform/client/service"
+	"github.com/hashicorp/terraform-plugin-sdk/helper/resource"
+
 	"github.com/hashicorp/terraform-plugin-sdk/helper/schema"
 	"github.com/hashicorp/terraform-plugin-sdk/terraform"
 	"github.com/joho/godotenv"
+	"github.com/stretchr/testify/assert"
+
+	"github.com/databrickslabs/databricks-terraform/client/service"
 )
 
 var testAccProviders map[string]terraform.ResourceProvider
@@ -76,3 +79,78 @@ resource "databricks_scim_group" "my-group-azure3" {
 }
 `
 }
+
+func TestProvider(t *testing.T) {
+	if err := testAccProvider.InternalValidate(); err != nil {
+		t.Fatalf("err: %s", err)
+	}
+}
+
+func TestProvider_NoOptionsResultsInError(t *testing.T) {
+	var provider = Provider("")
+	var raw = make(map[string]interface{})
+	raw["config_file"] = "testdata/.databrickscfg_non_existant"
+	err := provider.Configure(terraform.NewResourceConfigRaw(raw))
+	assert.NotNil(t, err)
+}
+
+func TestProvider_HostTokensTakePrecedence(t *testing.T) {
+	var raw = make(map[string]interface{})
+	raw["host"] = "foo"
+	raw["token"] = "configured"
+	raw["config_file"] = "testdata/.databrickscfg"
+	err := testAccProvider.Configure(terraform.NewResourceConfigRaw(raw))
+	assert.Nil(t, err)
+
+	client := testAccProvider.Meta().(*service.DBApiClient).Config
+	assert.Equal(t, "configured", client.Token)
+}
+
+func TestProvider_MissingEnvMakesConfigRead(t *testing.T) {
+	var raw = make(map[string]interface{})
+	raw["token"] = "configured"
+	raw["config_file"] = "testdata/.databrickscfg"
+	err := testAccProvider.Configure(terraform.NewResourceConfigRaw(raw))
+	assert.Nil(t, err)
+
+	client := testAccProvider.Meta().(*service.DBApiClient).Config
+	assert.Equal(t, "PT0+IC9kZXYvdXJhbmRvbSA8PT0KYFZ", client.Token)
+}
+
+func TestProvider_NoHostGivesError(t *testing.T) {
+	var raw = make(map[string]interface{})
+	raw["config_file"] = "testdata/.databrickscfg"
+	raw["profile"] = "nohost"
+	err := testAccProvider.Configure(terraform.NewResourceConfigRaw(raw))
+	assert.NotNil(t, err)
+}
+
+func TestProvider_NoTokenGivesError(t *testing.T) {
+	var raw = make(map[string]interface{})
+	raw["config_file"] = "testdata/.databrickscfg"
+	raw["profile"] = "notoken"
+	err := testAccProvider.Configure(terraform.NewResourceConfigRaw(raw))
+	assert.NotNil(t, err)
+}
+
+func TestProvider_InvalidProfileGivesError(t *testing.T) {
+	var raw = make(map[string]interface{})
+	raw["config_file"] = "testdata/.databrickscfg"
+	raw["profile"] = "invalidhost"
+	err := testAccProvider.Configure(terraform.NewResourceConfigRaw(raw))
+	assert.NotNil(t, err)
+}
+
+func TestDatabricksCliConfigWorks(t *testing.T) {
+	resource.Test(t,
+		resource.TestCase{
+			Providers: testAccProviders,
+			Steps: []resource.TestStep{
+				{
+					Config:             `provider "databricks" {}`,
+					ExpectNonEmptyPlan: true,
+				},
+			},
+		},
+	)
+}

databricks/testdata/.databrickscfg

@@ -0,0 +1,9 @@
+[DEFAULT]
+host = https://dbc-XXXXXXXX-YYYY.cloud.databricks.com/
+token = PT0+IC9kZXYvdXJhbmRvbSA8PT0KYFZ
+
+[nohost]
+token = PT0+IC9kZXYvdXJhbmRvbSA8PT0KYFZ
+
+[notoken]
+host = https://dbc-XXXXXXXX-YYYY.cloud.databricks.com/

go.mod

@@ -5,14 +5,26 @@ go 1.13
 require (
 	github.com/Azure/go-autorest/autorest v0.10.1
 	github.com/Azure/go-autorest/autorest/adal v0.8.3
+	github.com/fatih/color v1.9.0 // indirect
 	github.com/google/go-querystring v1.0.0
 	github.com/hashicorp/go-retryablehttp v0.6.6
 	github.com/hashicorp/hcl v1.0.0 // indirect
 	github.com/hashicorp/terraform-plugin-sdk v1.13.0
 	github.com/joho/godotenv v1.3.0
+	github.com/mattn/go-colorable v0.1.6 // indirect
+	github.com/mitchellh/go-homedir v1.1.0
+	github.com/pkg/errors v0.9.1 // indirect
 	github.com/r3labs/diff v0.0.0-20191120142937-b4ed99a31f5a
 	github.com/sergi/go-diff v1.1.0 // indirect
+	github.com/sirupsen/logrus v1.6.0 // indirect
+	github.com/smartystreets/goconvey v1.6.4 // indirect
+	github.com/spf13/pflag v1.0.5 // indirect
 	github.com/stretchr/testify v1.5.1
+	golang.org/x/crypto v0.0.0-20200604202706-70a84ac30bf9 // indirect
+	golang.org/x/sync v0.0.0-20200317015054-43a5402ce75a // indirect
+	golang.org/x/sys v0.0.0-20200602225109-6fdc65e7d980 // indirect
+	gopkg.in/ini.v1 v1.57.0
+	gotest.tools/gotestsum v0.4.2 // indirect
 )
 
 replace github.com/Azure/go-autorest => github.com/tombuildsstuff/go-autorest v14.0.1-0.20200317095413-f2d2d0252c3c+incompatible