chore(cmd,docs): updated docs and fixed cmd related tests.

Moreover, moved cmd output to more strictly follow `falcoctl` one,
with regards to printing usage/helper messages.

Signed-off-by: Federico Di Pierro <[email protected]>

cmd/cli_test.go

@@ -19,7 +19,6 @@ package cmd
 
 import (
 	"bytes"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"runtime"
@@ -131,6 +130,8 @@ var tests = []testCase{
 			"ubuntu-aws",
 			"--output-module",
 			"/tmp/falco-ubuntu-aws.ko",
+			"--output-probe",
+			"/tmp/falco-ubuntu-aws.o",
 			"--loglevel",
 			"debug",
 		},
@@ -143,6 +144,7 @@ var tests = []testCase{
 		env: map[string]string{
 			"DRIVERKIT_KERNELVERSION": "59",
 			"DRIVERKIT_OUTPUT_MODULE": "/tmp/falco-ubuntu-aws.ko",
+			"DRIVERKIT_OUTPUT_PROBE":  "/tmp/falco-ubuntu-aws.o",
 		},
 		args: []string{
 			"docker",
@@ -321,6 +323,7 @@ func run(t *testing.T, test testCase) {
 	var buf bytes.Buffer
 	configOpts.setOutput(&buf, true)
 	c := NewRootCmd(configOpts, rootOpts)
+	c.SetOutput(&buf)
 	if len(test.args) == 0 || (test.args[0] != "__complete" && test.args[0] != "__completeNoDesc" && test.args[0] != "help" && test.args[0] != "completion") {
 		test.args = append(test.args, "--dryrun")
 	}
@@ -338,6 +341,8 @@ func run(t *testing.T, test testCase) {
 		} else {
 			assert.Error(t, err, test.expect.err)
 		}
+		// Exactly same behavior as rootCmd.Start(), but here we use ERROR instead of FATAL to avoid leaving
+		configOpts.Printer.Logger.Error("error executing driverkit", configOpts.Printer.Logger.Args("err", err.Error()))
 	}
 	out := buf.String()
 	res := stripansi.Strip(out)
@@ -365,7 +370,7 @@ type testTemplateData struct {
 }
 
 func readTemplateFile(t *testing.T, s string) string {
-	out, err := ioutil.ReadFile("testdata/templates/" + s)
+	out, err := os.ReadFile("testdata/templates/" + s)
 	assert.NilError(t, err)
 	return string(out)
 }

cmd/config_options.go

@@ -51,10 +51,16 @@ type ConfigOptions struct {
 }
 
 func (co *ConfigOptions) initPrinter() {
+	// DisableStyling is only enforced by tests.
 	if co.disableStyling {
-		pterm.DisableColor()
+		pterm.DisableStyling()
 	}
 	co.Printer = output.NewPrinter(co.logLevel.ToPtermLogLevel(), pterm.LogFormatterColorful, co.writer)
+	if co.disableStyling {
+		// Disable time print for tests
+		co.Printer.Logger = co.Printer.Logger.WithTime(false)
+	}
+
 }
 
 // Called by tests to disable styling and set bytes buffer as output
@@ -97,7 +103,7 @@ func (co *ConfigOptions) validate() []error {
 // AddFlags registers the common flags.
 func (co *ConfigOptions) AddFlags(flags *pflag.FlagSet) {
 	flags.StringVarP(&co.configFile, "config", "c", co.configFile, "config file path (default $HOME/.driverkit.yaml if exists)")
-	flags.VarP(co.logLevel, "loglevel", "l", "Set level for logs "+co.logLevel.Allowed())
+	flags.VarP(co.logLevel, "loglevel", "l", "set level for logs "+co.logLevel.Allowed())
 	flags.IntVar(&co.Timeout, "timeout", co.Timeout, "timeout in seconds")
 	flags.StringVar(&co.ProxyURL, "proxy", co.ProxyURL, "the proxy to use to download data")
 	flags.BoolVar(&co.dryRun, "dryrun", co.dryRun, "do not actually perform the action")
@@ -133,7 +139,11 @@ func (co *ConfigOptions) Init() bool {
 	viper.SetEnvKeyReplacer(strings.NewReplacer("-", "_"))
 
 	// If a config file is found, read it in.
-	if err := viper.ReadInConfig(); err == nil {
+	err := viper.ReadInConfig()
+	// Init printer with either read or existent one,
+	// so that we can further log considering log level set.
+	co.initPrinter()
+	if err == nil {
 		co.Printer.Logger.Info("using config file",
 			co.Printer.Logger.Args("file", viper.ConfigFileUsed()))
 	} else {
@@ -143,6 +153,5 @@ func (co *ConfigOptions) Init() bool {
 			co.Printer.Logger.Debug("running without a configuration file")
 		}
 	}
-	co.initPrinter()
 	return configErr
 }

cmd/root.go

@@ -15,7 +15,9 @@ limitations under the License.
 package cmd
 
 import (
+	"errors"
 	"fmt"
+	"io"
 	"os"
 	"sort"
 	"strings"
@@ -31,10 +33,11 @@ import (
 
 func persistentValidateFunc(rootCommand *RootCmd, configOpts *ConfigOptions, rootOpts *RootOptions) func(c *cobra.Command, args []string) error {
 	return func(c *cobra.Command, args []string) error {
+		var validationError = errors.New("exiting for validation errors")
 		configErr := configOpts.Init()
 		// Early exit if detect some error into config flags
 		if configErr {
-			return fmt.Errorf("exiting for validation errors")
+			return validationError
 		}
 		// Merge environment variables or config file values into the RootOptions instance
 		skip := map[string]bool{ // do not merge these
@@ -89,7 +92,7 @@ func persistentValidateFunc(rootCommand *RootCmd, configOpts *ConfigOptions, roo
 					configOpts.Printer.Logger.Error("error validating build options",
 						configOpts.Printer.Logger.Args("err", err.Error()))
 				}
-				return fmt.Errorf("exiting for validation errors")
+				return validationError
 			}
 			rootOpts.Log(configOpts.Printer)
 		}
@@ -112,6 +115,7 @@ func NewRootCmd(configOpts *ConfigOptions, rootOpts *RootOptions) *RootCmd {
 		Args:                  cobra.OnlyValidArgs,
 		DisableFlagsInUseLine: true,
 		DisableAutoGenTag:     true,
+		SilenceErrors:         true,
 		SilenceUsage:          true,
 		Version:               version.String(),
 		RunE: func(c *cobra.Command, args []string) error {
@@ -189,6 +193,12 @@ func (r *RootCmd) SetArgs(args []string) {
 	r.c.SetArgs(args)
 }
 
+// SetOutput sets the main command output writer.
+func (r *RootCmd) SetOutput(w io.Writer) {
+	r.c.SetOut(w)
+	r.c.SetErr(w)
+}
+
 // Execute proxies the cobra.Command execution.
 func (r *RootCmd) Execute() error {
 	return r.c.Execute()

cmd/testdata/autohelp.txt

@@ -1,4 +1,5 @@
-level=INFO msg="specify a valid processor" processors="[docker kubernetes kubernetes-in-cluster local]"
+INFO  specify a valid processor
+    └ processors: [docker kubernetes kubernetes-in-cluster local]
 {{ .Desc }}
 
 {{ .Usage }}

cmd/testdata/configs/1.yaml

@@ -3,4 +3,5 @@ kernelversion: 59
 target: ubuntu-aws
 output:
     module: /tmp/falco-ubuntu-aws.ko
+    probe: /tmp/falco-ubuntu-aws.o
 driverversion: master

cmd/testdata/configs/2.yaml

@@ -7,4 +7,5 @@ kernelurls: [
 target: ubuntu-aws
 output:
     module: /tmp/falco-ubuntu-aws.ko
+    probe: /tmp/falco-ubuntu-aws.o
 driverversion: master

cmd/testdata/docker-from-config-debug.txt

@@ -1,3 +1,13 @@
-level=INFO msg="using config file" file=testdata/configs/1.yaml
-level=DEBUG msg="running with options" output-module=/tmp/falco-ubuntu-aws.ko output-probe="" driverversion=master kernelrelease=4.15.0-1057-aws kernelversion=59 target=ubuntu-aws arch={{ .CurrentArch }} kernelurls=[] repo-org=falcosecurity repo-name=libs
-level=INFO msg="driver building, it will take a few seconds" processor=docker
+INFO  using config file file: testdata/configs/1.yaml
+DEBUG running with options
+    ├ output-module: /tmp/falco-ubuntu-aws.ko
+    ├ output-probe: /tmp/falco-ubuntu-aws.o
+    ├ driverversion: master
+    ├ kernelrelease: 4.15.0-1057-aws
+    ├ kernelversion: 59
+    ├ target: ubuntu-aws
+    ├ arch: {{ .CurrentArch }}
+    ├ kernelurls: []
+    ├ repo-org: falcosecurity
+    └ repo-name: libs
+INFO  starting build processor: docker

cmd/testdata/docker-override-from-config-debug.txt

@@ -1,3 +1,13 @@
-level=INFO msg="using config file" file=testdata/configs/1.yaml
-level=DEBUG msg="running with options" output-module=/tmp/override.ko output-probe="" driverversion=master kernelrelease=4.15.0-1057-aws kernelversion=229 target=ubuntu-aws arch={{ .CurrentArch }} kernelurls=[] repo-org=falcosecurity repo-name=libs
-level=INFO msg="driver building, it will take a few seconds" processor=docker
+INFO  using config file file: testdata/configs/1.yaml
+DEBUG running with options
+    ├ output-module: /tmp/override.ko
+    ├ output-probe: /tmp/falco-ubuntu-aws.o
+    ├ driverversion: master
+    ├ kernelrelease: 4.15.0-1057-aws
+    ├ kernelversion: 229
+    ├ target: ubuntu-aws
+    ├ arch: {{ .CurrentArch }}
+    ├ kernelurls: []
+    ├ repo-org: falcosecurity
+    └ repo-name: libs
+INFO  starting build processor: docker

cmd/testdata/docker-override-urls-from-config-debug.txt

@@ -1,3 +1,13 @@
-level=INFO msg="using config file" file=testdata/configs/2.yaml
-level=DEBUG msg="running with options" output-module=/tmp/falco-ubuntu-aws.ko output-probe="" driverversion=master kernelrelease=4.15.0-1057-aws kernelversion=59 target=ubuntu-aws arch={{ .CurrentArch }} kernelurls="[https://mirrors.edge.kernel.org/ubuntu/pool/main/l/linux-aws/linux-aws-headers-4.15.0-1057_4.15.0-1057.59_all.deb https://mirrors.edge.kernel.org/ubuntu/pool/main/l/linux-aws/linux-headers-4.15.0-1057-aws_4.15.0-1057.59_amd64.deb]" repo-org=falcosecurity repo-name=libs
-level=INFO msg="driver building, it will take a few seconds" processor=docker
+INFO  using config file file: testdata/configs/2.yaml
+DEBUG running with options
+    ├ output-module: /tmp/falco-ubuntu-aws.ko
+    ├ output-probe: /tmp/falco-ubuntu-aws.o
+    ├ driverversion: master
+    ├ kernelrelease: 4.15.0-1057-aws
+    ├ kernelversion: 59
+    ├ target: ubuntu-aws
+    ├ arch: {{ .CurrentArch }}
+    ├ kernelurls: [https://mirrors.edge.kernel.org/ubuntu/pool/main/l/linux-aws/linux-aws-headers-4.15.0-1057_4.15.0-1057.59_all.deb https://mirrors.edge.kernel.org/ubuntu/pool/main/l/linux-aws/linux-headers-4.15.0-1057-aws_4.15.0-1057.59_amd64.deb]
+    ├ repo-org: falcosecurity
+    └ repo-name: libs
+INFO  starting build processor: docker

cmd/testdata/docker-related-target-debug.txt

@@ -1,3 +1,13 @@
-level=DEBUG msg="running without a configuration file"
-level=DEBUG msg="running with options" output-module=/tmp/falco-ubuntu-azure.ko output-probe="" driverversion=master kernelrelease=4.15.0-1057-azure kernelversion=62 target=ubuntu-azure arch={{ .CurrentArch }} kernelurls="[http://mirrors.edge.kernel.org/ubuntu/pool/main/l/linux-azure/linux-azure-headers-4.15.0-1057_4.15.0-1057.62_all.deb http://mirrors.edge.kernel.org/ubuntu/pool/main/l/linux-azure/linux-headers-4.15.0-1057-azure_4.15.0-1057.62_amd64.deb]" repo-org=falcosecurity repo-name=libs
-level=INFO msg="driver building, it will take a few seconds" processor=docker
+DEBUG running without a configuration file 
+DEBUG running with options
+    ├ output-module: /tmp/falco-ubuntu-azure.ko
+    ├ output-probe: /tmp/falco-ubuntu-aws.o
+    ├ driverversion: master
+    ├ kernelrelease: 4.15.0-1057-azure
+    ├ kernelversion: 62
+    ├ target: ubuntu-azure
+    ├ arch: {{ .CurrentArch }}
+    ├ kernelurls: [http://mirrors.edge.kernel.org/ubuntu/pool/main/l/linux-azure/linux-azure-headers-4.15.0-1057_4.15.0-1057.62_all.deb http://mirrors.edge.kernel.org/ubuntu/pool/main/l/linux-azure/linux-headers-4.15.0-1057-azure_4.15.0-1057.62_amd64.deb]
+    ├ repo-org: falcosecurity
+    └ repo-name: libs
+INFO  starting build processor: docker

cmd/testdata/docker-target-redhat-validation-error-debug.txt

@@ -1,8 +1,4 @@
-level=DEBUG msg="running without a configuration file"
-level=ERROR msg="error validating build options" err="builder image is a required field when target is redhat"
-Error: exiting for validation errors
-Usage:
-  driverkit docker [flags]
-
-{{ .Flags }}
-
+DEBUG running without a configuration file 
+ERROR error validating build options
+    └ err: builder image is a required field when target is redhat
+ERROR error executing driverkit err: exiting for validation errors

cmd/testdata/docker-with-flags-debug.txt

@@ -1,3 +1,13 @@
-level=DEBUG msg="running without a configuration file"
-level=DEBUG msg="running with options" output-module=/tmp/falco-ubuntu-aws.ko output-probe="" driverversion=master kernelrelease=4.15.0-1057-aws kernelversion=59 target=ubuntu-aws arch={{ .CurrentArch }} kernelurls="[https://mirrors.edge.kernel.org/ubuntu/pool/main/l/linux-aws/linux-aws-headers-4.15.0-1057_4.15.0-1057.59_all.deb https://mirrors.edge.kernel.org/ubuntu/pool/main/l/linux-aws/linux-headers-4.15.0-1057-aws_4.15.0-1057.59_amd64.deb]" repo-org=falcosecurity repo-name=libs
-level=INFO msg="driver building, it will take a few seconds" processor=docker
+DEBUG running without a configuration file 
+DEBUG running with options
+    ├ output-module: /tmp/falco-ubuntu-aws.ko
+    ├ output-probe: /tmp/falco-ubuntu-aws.o
+    ├ driverversion: master
+    ├ kernelrelease: 4.15.0-1057-aws
+    ├ kernelversion: 59
+    ├ target: ubuntu-aws
+    ├ arch: {{ .CurrentArch }}
+    ├ kernelurls: [https://mirrors.edge.kernel.org/ubuntu/pool/main/l/linux-aws/linux-aws-headers-4.15.0-1057_4.15.0-1057.59_all.deb https://mirrors.edge.kernel.org/ubuntu/pool/main/l/linux-aws/linux-headers-4.15.0-1057-aws_4.15.0-1057.59_amd64.deb]
+    ├ repo-org: falcosecurity
+    └ repo-name: libs
+INFO  starting build processor: docker

cmd/testdata/docker-with-flags.txt

@@ -1 +1 @@
-level=INFO msg="driver building, it will take a few seconds" processor=docker
+INFO  starting build processor: docker

cmd/testdata/dockernoopts.txt

@@ -1,10 +1,7 @@
-level=ERROR msg="error validating build options" err="kernel release is a required field"
-level=ERROR msg="error validating build options" err="target is a required field"
-level=ERROR msg="error validating build options" err="output module path is required when probe is missing"
-level=ERROR msg="error validating build options" err="output probe path is required when module is missing"
-Error: exiting for validation errors
-Usage:
-  driverkit docker [flags]
-
-{{ .Flags }}
-
+ERROR error validating build options err: kernel release is a required field
+ERROR error validating build options err: target is a required field
+ERROR error validating build options
+    └ err: output module path is required when probe is missing
+ERROR error validating build options
+    └ err: output probe path is required when module is missing
+ERROR error executing driverkit err: exiting for validation errors

cmd/testdata/invalid-proxyconfig.txt

@@ -1,11 +1,3 @@
-level=ERROR msg="error validating config options" err="proxy url must start with http:// or https:// or socks5:// prefix"
-Error: exiting for validation errors
-{{ .Usage }}
-
-{{ .Commands }}
-
-{{ .Flags }}
-  -v, --version                    version for driverkit
-
-{{ .Info }}
-
+ERROR error validating config options
+    └ err: proxy url must start with http:// or https:// or socks5:// prefix
+ERROR error executing driverkit err: exiting for validation errors

cmd/testdata/non-existent-processor.txt

@@ -1,10 +1 @@
-Error: invalid argument "abc" for "driverkit"
-{{ .Usage }}
-
-{{ .Commands }}
-
-{{ .Flags }}
-  -v, --version                    version for driverkit
-
-{{ .Info }}
-
+ERROR error executing driverkit err: invalid argument "abc" for "driverkit"

cmd/testdata/templates/flags.txt

@@ -11,7 +11,7 @@ Flags:
       --kernelrelease string       kernel release to build the module for, it can be found by executing 'uname -v'
       --kernelurls strings         list of kernel header urls (e.g. --kernelurls <URL1> --kernelurls <URL2> --kernelurls "<URL3>,<URL4>")
       --kernelversion string       kernel version to build the module for, it's the numeric value after the hash when you execute 'uname -v' (default "1")
-  -l, --loglevel string            log level (default "INFO")
+  -l, --loglevel string            set level for logs (info, warn, debug, trace) (default "info")
       --moduledevicename string    kernel module device name (the default is falco, so the device will be under /dev/falco*) (default "falco")
       --moduledrivername string    kernel module driver name, i.e. the name you see when you check installed modules via lsmod (default "falco")
       --output-module string       filepath where to save the resulting kernel module

docs/driverkit.md

@@ -21,7 +21,7 @@ driverkit
       --kernelrelease string       kernel release to build the module for, it can be found by executing 'uname -v'
       --kernelurls strings         list of kernel header urls (e.g. --kernelurls <URL1> --kernelurls <URL2> --kernelurls "<URL3>,<URL4>")
       --kernelversion string       kernel version to build the module for, it's the numeric value after the hash when you execute 'uname -v' (default "1")
-  -l, --loglevel string            Set level for logs (info, warn, debug, trace) (default "info")
+  -l, --loglevel string            set level for logs (info, warn, debug, trace) (default "info")
       --moduledevicename string    kernel module device name (the default is falco, so the device will be under /dev/falco*) (default "falco")
       --moduledrivername string    kernel module driver name, i.e. the name you see when you check installed modules via lsmod (default "falco")
       --output-module string       filepath where to save the resulting kernel module

docs/driverkit_docker.md

@@ -21,7 +21,7 @@ driverkit docker [flags]
       --kernelrelease string       kernel release to build the module for, it can be found by executing 'uname -v'
       --kernelurls strings         list of kernel header urls (e.g. --kernelurls <URL1> --kernelurls <URL2> --kernelurls "<URL3>,<URL4>")
       --kernelversion string       kernel version to build the module for, it's the numeric value after the hash when you execute 'uname -v' (default "1")
-  -l, --loglevel string            Set level for logs (info, warn, debug, trace) (default "info")
+  -l, --loglevel string            set level for logs (info, warn, debug, trace) (default "info")
       --moduledevicename string    kernel module device name (the default is falco, so the device will be under /dev/falco*) (default "falco")
       --moduledrivername string    kernel module driver name, i.e. the name you see when you check installed modules via lsmod (default "falco")
       --output-module string       filepath where to save the resulting kernel module

docs/driverkit_images.md

@@ -21,7 +21,7 @@ driverkit images [flags]
       --kernelrelease string       kernel release to build the module for, it can be found by executing 'uname -v'
       --kernelurls strings         list of kernel header urls (e.g. --kernelurls <URL1> --kernelurls <URL2> --kernelurls "<URL3>,<URL4>")
       --kernelversion string       kernel version to build the module for, it's the numeric value after the hash when you execute 'uname -v' (default "1")
-  -l, --loglevel string            Set level for logs (info, warn, debug, trace) (default "info")
+  -l, --loglevel string            set level for logs (info, warn, debug, trace) (default "info")
       --moduledevicename string    kernel module device name (the default is falco, so the device will be under /dev/falco*) (default "falco")
       --moduledrivername string    kernel module driver name, i.e. the name you see when you check installed modules via lsmod (default "falco")
       --output-module string       filepath where to save the resulting kernel module

docs/driverkit_kubernetes-in-cluster.md

@@ -22,7 +22,7 @@ driverkit kubernetes-in-cluster [flags]
       --kernelrelease string       kernel release to build the module for, it can be found by executing 'uname -v'
       --kernelurls strings         list of kernel header urls (e.g. --kernelurls <URL1> --kernelurls <URL2> --kernelurls "<URL3>,<URL4>")
       --kernelversion string       kernel version to build the module for, it's the numeric value after the hash when you execute 'uname -v' (default "1")
-  -l, --loglevel string            Set level for logs (info, warn, debug, trace) (default "info")
+  -l, --loglevel string            set level for logs (info, warn, debug, trace) (default "info")
       --moduledevicename string    kernel module device name (the default is falco, so the device will be under /dev/falco*) (default "falco")
       --moduledrivername string    kernel module driver name, i.e. the name you see when you check installed modules via lsmod (default "falco")
   -n, --namespace string           If present, the namespace scope for the pods and its config  (default "default")

docs/driverkit_kubernetes.md

@@ -34,7 +34,7 @@ driverkit kubernetes [flags]
       --kernelurls strings             list of kernel header urls (e.g. --kernelurls <URL1> --kernelurls <URL2> --kernelurls "<URL3>,<URL4>")
       --kernelversion string           kernel version to build the module for, it's the numeric value after the hash when you execute 'uname -v' (default "1")
       --kubeconfig string              path to the kubeconfig file to use for CLI requests
-  -l, --loglevel string                Set level for logs (info, warn, debug, trace) (default "info")
+  -l, --loglevel string                set level for logs (info, warn, debug, trace) (default "info")
       --moduledevicename string        kernel module device name (the default is falco, so the device will be under /dev/falco*) (default "falco")
       --moduledrivername string        kernel module driver name, i.e. the name you see when you check installed modules via lsmod (default "falco")
   -n, --namespace string               If present, the namespace scope for the pods and its config  (default "default")