Fix host resolution order in auth login

cmd/auth/auth.go

@@ -2,9 +2,12 @@ package auth
 
 import (
 	"context"
+	"fmt"
+	"strings"
 
 	"github.com/databricks/cli/libs/auth"
 	"github.com/databricks/cli/libs/cmdio"
+	"github.com/google/uuid"
 	"github.com/spf13/cobra"
 )
 
@@ -34,25 +37,36 @@ GCP: https://docs.gcp.databricks.com/dev-tools/auth/index.html`,
 }
 
 func promptForHost(ctx context.Context) (string, error) {
+	if !cmdio.IsInTTY(ctx) {
+		return "", fmt.Errorf("the command is being run in a non-interactive environment, please specify a host using --host")
+	}
+
 	prompt := cmdio.Prompt(ctx)
-	prompt.Label = "Databricks Host (e.g. https://<databricks-instance>.cloud.databricks.com)"
-	// Validate?
-	host, err := prompt.Run()
-	if err != nil {
-		return "", err
+	prompt.Label = "Databricks host"
+	prompt.Validate = func(host string) error {
+		if !strings.HasPrefix(host, "https://") {
+			return fmt.Errorf("host URL must have a https:// prefix")
+		}
+		return nil
 	}
-	return host, nil
+	return prompt.Run()
 }
 
 func promptForAccountID(ctx context.Context) (string, error) {
+	if !cmdio.IsInTTY(ctx) {
+		return "", fmt.Errorf("the command is being run in a non-interactive environment, please specify an account ID using --account-id")
+	}
+
 	prompt := cmdio.Prompt(ctx)
-	prompt.Label = "Databricks Account ID"
+	prompt.Label = "Databricks account id"
 	prompt.Default = ""
 	prompt.AllowEdit = true
-	// Validate?
-	accountId, err := prompt.Run()
-	if err != nil {
-		return "", err
+	prompt.Validate = func(accountID string) error {
+		_, err := uuid.Parse(accountID)
+		if err != nil {
+			return fmt.Errorf("account ID must be a valid UUID: %w", err)
+		}
+		return nil
 	}
-	return accountId, nil
+	return prompt.Run()
 }

cmd/auth/login.go

@@ -16,18 +16,37 @@ import (
 	"github.com/spf13/cobra"
 )
 
-func configureHost(ctx context.Context, persistentAuth *auth.PersistentAuth, args []string, argIndex int) error {
-	if len(args) > argIndex {
-		persistentAuth.Host = args[argIndex]
-		return nil
+func promptForProfile(ctx context.Context, dv string) (string, error) {
+	if !cmdio.IsInTTY(ctx) {
+		return "", fmt.Errorf("the command is being run in a non-interactive environment, please specify a profile using --profile")
 	}
 
-	host, err := promptForHost(ctx)
+	prompt := cmdio.Prompt(ctx)
+	prompt.Label = "Databricks profile name"
+	prompt.Default = dv
+	prompt.AllowEdit = true
+	return prompt.Run()
+}
+
+func getHostFromProfile(ctx context.Context, profileName string) (string, error) {
+	_, profiles, err := databrickscfg.LoadProfiles(ctx, func(p databrickscfg.Profile) bool {
+		return p.Name == profileName
+	})
+
+	// Tolerate ErrNoConfiguration here, as we will write out a configuration file
+	// as part of the login flow.
+	if err != nil && errors.Is(err, databrickscfg.ErrNoConfiguration) {
+		return "", nil
+	}
 	if err != nil {
-		return err
+		return "", err
 	}
-	persistentAuth.Host = host
-	return nil
+
+	// Return host from profile
+	if len(profiles) > 0 && profiles[0].Host != "" {
+		return profiles[0].Host, nil
+	}
+	return "", nil
 }
 
 const minimalDbConnectVersion = "13.1"
@@ -91,23 +110,18 @@ depends on the existing profiles you have set in your configuration file
 
 	cmd.RunE = func(cmd *cobra.Command, args []string) error {
 		ctx := cmd.Context()
+		profileName := cmd.Flag("profile").Value.String()
 
-		var profileName string
-		profileFlag := cmd.Flag("profile")
-		if profileFlag != nil && profileFlag.Value.String() != "" {
-			profileName = profileFlag.Value.String()
-		} else if cmdio.IsInTTY(ctx) {
-			prompt := cmdio.Prompt(ctx)
-			prompt.Label = "Databricks Profile Name"
-			prompt.Default = persistentAuth.ProfileName()
-			prompt.AllowEdit = true
-			profile, err := prompt.Run()
+		// If the user has not specified a profile name, prompt for one.
+		if profileName == "" {
+			var err error
+			profileName, err = promptForProfile(ctx, persistentAuth.DefaultProfileName())
 			if err != nil {
 				return err
 			}
-			profileName = profile
 		}
 
+		// Set the host based on the provided arguments and flags.
 		err := setHost(ctx, profileName, persistentAuth, args)
 		if err != nil {
 			return err
@@ -172,21 +186,37 @@ depends on the existing profiles you have set in your configuration file
 	return cmd
 }
 
+// Sets the host in the persistentAuth object based on the provided arguments and flags.
+// Follows the following precedence:
+// 1. [HOST] (first positional argument) or --host flag. Error if both are specified.
+// 2. Profile host, if available.
+// 3. Prompt the user for the host.
 func setHost(ctx context.Context, profileName string, persistentAuth *auth.PersistentAuth, args []string) error {
-	// If the chosen profile has a hostname and the user hasn't specified a host, infer the host from the profile.
-	_, profiles, err := databrickscfg.LoadProfiles(ctx, func(p databrickscfg.Profile) bool {
-		return p.Name == profileName
-	})
-	// Tolerate ErrNoConfiguration here, as we will write out a configuration as part of the login flow.
-	if err != nil && !errors.Is(err, databrickscfg.ErrNoConfiguration) {
-		return err
+	// If both [HOST] and --host are provided, return an error.
+	if len(args) > 0 && persistentAuth.Host != "" {
+		return fmt.Errorf("please only provide a host as an argument or a flag, not both")
+	}
+
+	// If [HOST] is provided, set the host to the provided positional argument.
+	if len(args) > 0 && persistentAuth.Host == "" {
+		persistentAuth.Host = args[0]
 	}
-	if persistentAuth.Host == "" {
-		if len(profiles) > 0 && profiles[0].Host != "" {
-			persistentAuth.Host = profiles[0].Host
-		} else {
-			configureHost(ctx, persistentAuth, args, 0)
+
+	// If neither [HOST] nor --host are provided, and the profile has a host, use it.
+	// Otherwise, prompt the user for a host.
+	if len(args) == 0 && persistentAuth.Host == "" {
+		hostName, err := getHostFromProfile(ctx, profileName)
+		if err != nil {
+			return err
+		}
+		if hostName == "" {
+			var err error
+			hostName, err = promptForHost(ctx)
+			if err != nil {
+				return err
+			}
 		}
+		persistentAuth.Host = hostName
 	}
 	return nil
 }

cmd/auth/login_test.go

@@ -15,3 +15,38 @@ func TestSetHostDoesNotFailWithNoDatabrickscfg(t *testing.T) {
 	err := setHost(ctx, "foo", &auth.PersistentAuth{Host: "test"}, []string{})
 	assert.NoError(t, err)
 }
+
+func TestSetHost(t *testing.T) {
+	ctx := context.Background()
+	var persistentAuth auth.PersistentAuth
+	t.Setenv("DATABRICKS_CONFIG_FILE", "./testdata/.databrickscfg")
+
+	// Test error when both flag and argument are provided
+	persistentAuth.Host = "val from --host"
+	err := setHost(ctx, "profile-1", &persistentAuth, []string{"val from [HOST]"})
+	assert.EqualError(t, err, "please only provide a host as an argument or a flag, not both")
+
+	// Test setting host from flag
+	persistentAuth.Host = "val from --host"
+	err = setHost(ctx, "profile-1", &persistentAuth, []string{})
+	assert.NoError(t, err)
+	assert.Equal(t, "val from --host", persistentAuth.Host)
+
+	// Test setting host from argument
+	persistentAuth.Host = ""
+	err = setHost(ctx, "profile-1", &persistentAuth, []string{"val from [HOST]"})
+	assert.NoError(t, err)
+	assert.Equal(t, "val from [HOST]", persistentAuth.Host)
+
+	// Test setting host from profile
+	persistentAuth.Host = ""
+	err = setHost(ctx, "profile-1", &persistentAuth, []string{})
+	assert.NoError(t, err)
+	assert.Equal(t, "https://www.host1.com", persistentAuth.Host)
+
+	// Test setting host from profile
+	persistentAuth.Host = ""
+	err = setHost(ctx, "profile-2", &persistentAuth, []string{})
+	assert.NoError(t, err)
+	assert.Equal(t, "https://www.host2.com", persistentAuth.Host)
+}

cmd/auth/testdata/.databrickscfg

@@ -0,0 +1,5 @@
+[profile-1]
+host = https://www.host1.com
+
+[profile-2]
+host = https://www.host2.com

libs/auth/oauth.go

@@ -91,11 +91,13 @@ func (a *PersistentAuth) Load(ctx context.Context) (*oauth2.Token, error) {
 	return refreshed, nil
 }
 
-func (a *PersistentAuth) ProfileName() string {
-	// TODO: get profile name from interactive input
+func (a *PersistentAuth) DefaultProfileName() string {
 	if a.AccountID != "" {
 		return fmt.Sprintf("ACCOUNT-%s", a.AccountID)
 	}
+	if a.Host == "" {
+		return "DEFAULT"
+	}
 	host := strings.TrimPrefix(a.Host, "https://")
 	split := strings.Split(host, ".")
 	return split[0]