new(cmd/driver,pkg/options,internal/config): added driver config cmd tests

cmd/driver/config/config.go

@@ -158,7 +158,10 @@ func (o *driverConfigOptions) RunDriverConfig(ctx context.Context, cmd *cobra.Co
 
 			d, err := driverdistro.Discover(info, driverCfg.HostRoot)
 			if err != nil {
-				return err
+				if !errors.Is(err, driverdistro.ErrUnsupported) {
+					return err
+				}
+				o.Printer.Logger.Info("Detected an unsupported target system; falling back at generic logic.")
 			}
 			o.Printer.Logger.Debug("Discovered distro", o.Printer.Logger.Args("target", d))
 

cmd/driver/config/config_suite_test.go

@@ -0,0 +1,69 @@
+// SPDX-License-Identifier: Apache-2.0
+// Copyright (C) 2023 The Falco Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package driverconfig_test
+
+import (
+	"context"
+	"os"
+	"path/filepath"
+	"testing"
+
+	. "github.com/onsi/ginkgo/v2"
+	. "github.com/onsi/gomega"
+	"github.com/onsi/gomega/gbytes"
+	"github.com/spf13/cobra"
+
+	"github.com/falcosecurity/falcoctl/cmd"
+	commonoptions "github.com/falcosecurity/falcoctl/pkg/options"
+	testutils "github.com/falcosecurity/falcoctl/pkg/test"
+)
+
+var (
+	ctx        = context.Background()
+	output     = gbytes.NewBuffer()
+	rootCmd    *cobra.Command
+	opt        *commonoptions.Common
+	configFile string
+	err        error
+	args       []string
+)
+
+func TestConfig(t *testing.T) {
+	RegisterFailHandler(Fail)
+	RunSpecs(t, "Config Suite")
+}
+
+var _ = BeforeSuite(func() {
+
+	// Create and configure the common options.
+	opt = commonoptions.NewOptions()
+	opt.Initialize(commonoptions.WithWriter(output))
+
+	// Create temporary directory used to save the configuration file.
+	configFile, err = testutils.CreateEmptyFile("falcoctl.yaml")
+	Expect(err).Should(Succeed())
+})
+
+var _ = AfterSuite(func() {
+	configDir := filepath.Dir(configFile)
+	Expect(os.RemoveAll(configDir)).Should(Succeed())
+})
+
+func executeRoot(args []string) error {
+	rootCmd.SetArgs(args)
+	rootCmd.SetOut(output)
+	return cmd.Execute(rootCmd, opt)
+}

cmd/driver/config/config_test.go

@@ -0,0 +1,82 @@
+// SPDX-License-Identifier: Apache-2.0
+// Copyright (C) 2023 The Falco Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package driverconfig_test
+
+import (
+	"regexp"
+
+	. "github.com/onsi/ginkgo/v2"
+	. "github.com/onsi/gomega"
+	"github.com/onsi/gomega/gbytes"
+
+	"github.com/falcosecurity/falcoctl/cmd"
+)
+
+var driverConfigHelp = `Configure a driver for future usages with other driver subcommands.`
+
+var addAssertFailedBehavior = func(specificError string) {
+	It("check that fails and the usage is not printed", func() {
+		Expect(err).To(HaveOccurred())
+		Expect(output).Should(gbytes.Say(regexp.QuoteMeta(specificError)))
+	})
+}
+
+var _ = Describe("config", func() {
+
+	var (
+		driverCmd = "driver"
+		configCmd = "config"
+	)
+
+	// Each test gets its own root command and runs it.
+	// The err variable is asserted by each test.
+	JustBeforeEach(func() {
+		rootCmd = cmd.New(ctx, opt)
+		err = executeRoot(args)
+	})
+
+	JustAfterEach(func() {
+		Expect(output.Clear()).ShouldNot(HaveOccurred())
+	})
+
+	Context("help message", func() {
+		BeforeEach(func() {
+			args = []string{driverCmd, configCmd, "--help"}
+		})
+
+		It("should match the saved one", func() {
+			Expect(output).Should(gbytes.Say(driverConfigHelp))
+		})
+	})
+
+	// Here we are testing failure cases for configuring a driver.
+	Context("failure", func() {
+		When("with non absolute host-root", func() {
+			BeforeEach(func() {
+				args = []string{driverCmd, configCmd, "--config", configFile, "--host-root", "foo/"}
+			})
+			addAssertFailedBehavior("ERROR host-root must be an absolute path: foo/")
+		})
+
+		When("with invalid driver type", func() {
+			BeforeEach(func() {
+				args = []string{driverCmd, configCmd, "--config", configFile, "--type", "foo"}
+			})
+			addAssertFailedBehavior(`ERROR invalid argument "foo" for "--type" flag: invalid argument "foo",` +
+				` please provide one of (auto, ebpf, kmod, modern_ebpf)`)
+		})
+	})
+})

cmd/driver/printenv/printenv.go

@@ -16,6 +16,7 @@
 package driverprintenv
 
 import (
+	"errors"
 	"strings"
 
 	"github.com/spf13/cobra"
@@ -67,7 +68,9 @@ func (o *driverPrintenvOptions) RunDriverPrintenv(_ context.Context) error {
 
 	d, err := driverdistro.Discover(kr, driver.HostRoot)
 	if err != nil {
-		return err
+		if !errors.Is(err, driverdistro.ErrUnsupported) {
+			return err
+		}
 	}
 	o.Printer.DefaultText.Printf("TARGET_ID=%q\n", d.String())
 

internal/config/config.go

@@ -231,7 +231,11 @@ func Load(path string) error {
 	// Set default registry auth config path
 	viper.SetDefault(RegistryCredentialConfigKey, DefaultRegistryCredentialConfPath)
 	// Set default driver
-	viper.SetDefault(DriverKey, DefaultDriver)
+	viper.SetDefault(DriverTypeKey, DefaultDriver.Type)
+	viper.SetDefault(DriverHostRootKey, DefaultDriver.HostRoot)
+	viper.SetDefault(DriverNameKey, DefaultDriver.Name)
+	viper.SetDefault(DriverReposKey, DefaultDriver.Repos)
+	viper.SetDefault(DriverVersionKey, DefaultDriver.Version)
 
 	err = viper.ReadInConfig()
 	if errors.As(err, &viper.ConfigFileNotFoundError{}) || os.IsNotExist(err) {
@@ -642,7 +646,7 @@ func UpdateConfigFile(key string, value interface{}, path string) error {
 	v.Set(key, value)
 
 	if err := v.WriteConfig(); err != nil {
-		return fmt.Errorf("unable to set key %q to config file: %w", IndexesKey, err)
+		return fmt.Errorf("unable to set key %q to config file: %w", key, err)
 	}
 
 	return nil

pkg/options/driver.go

@@ -16,6 +16,8 @@
 package options
 
 import (
+	"sort"
+
 	drivertype "github.com/falcosecurity/falcoctl/pkg/driver/type"
 )
 
@@ -26,7 +28,9 @@ type DriverTypes struct {
 
 // NewDriverTypes returns a new Enum configured for the driver types.
 func NewDriverTypes() *DriverTypes {
+	types := drivertype.GetTypes()
+	sort.Strings(types)
 	return &DriverTypes{
-		Enum: NewEnum(drivertype.GetTypes(), drivertype.TypeKmod),
+		Enum: NewEnum(types, drivertype.TypeKmod),
 	}
 }