Fix #1449: fix help command and logs

cmd/kamel/main.go

@@ -19,7 +19,6 @@ package main
 
 import (
 	"context"
-	"fmt"
 	"math/rand"
 	"os"
 	"time"
@@ -42,18 +41,8 @@ func main() {
 	defer cancel()
 
 	// Add modeline options to the command
-	rootCmd, args, err := cmd.NewKamelWithModelineCommand(ctx, os.Args)
-	if err != nil {
-		fmt.Printf("Error: %s\n", err.Error())
-		exitOnError(err)
-	}
-
-	// Give a feedback about the actual command that is run
-	fmt.Fprint(rootCmd.OutOrStdout(), "Executing: kamel ")
-	for _, a := range args {
-		fmt.Fprintf(rootCmd.OutOrStdout(), "%s ", a)
-	}
-	fmt.Fprintln(rootCmd.OutOrStdout())
+	rootCmd, _, err := cmd.NewKamelWithModelineCommand(ctx, os.Args)
+	exitOnError(err)
 
 	err = rootCmd.Execute()
 	exitOnError(err)

pkg/cmd/modeline.go

@@ -8,6 +8,7 @@ import (
 	"github.com/apache/camel-k/pkg/util/modeline"
 	"github.com/pkg/errors"
 	"github.com/spf13/cobra"
+	"github.com/spf13/pflag"
 	"path/filepath"
 )
 
@@ -33,7 +34,22 @@ var (
 
 func NewKamelWithModelineCommand(ctx context.Context, osArgs []string) (*cobra.Command, []string, error) {
 	processed := make(map[string]bool)
-	return createKamelWithModelineCommand(ctx, osArgs[1:], processed)
+	originalFlags := osArgs[1:]
+	rootCmd, flags, err := createKamelWithModelineCommand(ctx, append([]string(nil), originalFlags...), processed)
+	if err != nil {
+		fmt.Printf("Error: %s\n", err.Error())
+		return rootCmd, flags, err
+	}
+	if len(originalFlags) != len(flags) {
+		// Give a feedback about the actual command that is run
+		fmt.Fprintln(rootCmd.OutOrStdout(), "Modeline options have been loaded from source files")
+		fmt.Fprint(rootCmd.OutOrStdout(), "Full command: kamel ")
+		for _, a := range flags {
+			fmt.Fprintf(rootCmd.OutOrStdout(), "%s ", a)
+		}
+		fmt.Fprintln(rootCmd.OutOrStdout())
+	}
+	return rootCmd, flags, nil
 }
 
 func createKamelWithModelineCommand(ctx context.Context, args []string, processedFiles map[string]bool) (*cobra.Command, []string, error) {
@@ -52,7 +68,9 @@ func createKamelWithModelineCommand(ctx context.Context, args []string, processe
 	}
 
 	err = target.ParseFlags(flags)
-	if err != nil {
+	if err == pflag.ErrHelp {
+		return rootCmd, args, nil
+	} else if err != nil {
 		return nil, nil, err
 	}
 

pkg/cmd/modeline_test.go

@@ -46,6 +46,19 @@ func TestModelineRunSimple(t *testing.T) {
 	assert.Equal(t, []string{"run", fileName, "--dependency", "mvn:org.my:lib:1.0"}, flags)
 }
 
+func TestModelineRunHelp(t *testing.T) {
+	dir, err := ioutil.TempDir("", "camel-k-test-")
+	assert.NoError(t, err)
+	defer os.RemoveAll(dir)
+	// no file created
+	fileName := path.Join(dir, "simple.groovy")
+
+	cmd, flags, err := NewKamelWithModelineCommand(context.TODO(), []string{"kamel", "run", fileName, "--help"})
+	assert.NoError(t, err)
+	assert.NotNil(t, cmd)
+	assert.Equal(t, []string{"run", fileName, "--help"}, flags)
+}
+
 func TestModelineRunChain(t *testing.T) {
 	dir, err := ioutil.TempDir("", "camel-k-test-")
 	assert.NoError(t, err)