feat: git options

Signed-off-by: Carlos Alexandro Becker <caarlos0@gmail.com>

cmd/executor/cmd/root.go

@@ -175,9 +175,7 @@ func addKanikoOptionsFlags() {
 	RootCmd.PersistentFlags().VarP(&opts.Labels, "label", "", "Set metadata for an image. Set it repeatedly for multiple labels.")
 	RootCmd.PersistentFlags().BoolVarP(&opts.SkipUnusedStages, "skip-unused-stages", "", false, "Build only used stages if defined to true. Otherwise it builds by default all stages, even the unnecessaries ones until it reaches the target stage / end of Dockerfile")
 	RootCmd.PersistentFlags().BoolVarP(&opts.RunV2, "use-new-run", "", false, "Experimental run command to detect file system changes. This new run command does no rely on snapshotting to detect changes.")
-	RootCmd.PersistentFlags().StringVarP(&opts.Git.Branch, "git-branch", "", "", "Branch to clone if build context is a git repository")
-	RootCmd.PersistentFlags().BoolVarP(&opts.Git.SingleBranch, "git-single-branch", "", false, "Whether to clone a single branch")
-	RootCmd.PersistentFlags().BoolVarP(&opts.Git.RecurseSubmodules, "git-recurse-submodules", "", false, "Whether to clone recursing submodules")
+	RootCmd.PersistentFlags().Var(&opts.Git, "git", "Branch to clone if build context is a git repository")
 }
 
 // addHiddenFlags marks certain flags as hidden from the executor help text

pkg/config/options.go

@@ -17,6 +17,10 @@ limitations under the License.
 package config
 
 import (
+	"errors"
+	"fmt"
+	"strconv"
+	"strings"
 	"time"
 )
 
@@ -67,6 +71,40 @@ type KanikoGitOptions struct {
 	RecurseSubmodules bool
 }
 
+var ErrInvalidGitFlag = errors.New("invalid git flag, must be in the key=value format")
+
+func (k *KanikoGitOptions) Type() string {
+	return "gitoptions"
+}
+
+func (k *KanikoGitOptions) String() string {
+	return fmt.Sprintf("branch=%s,single-branch=%t,recurse-submodules=%t", k.Branch, k.SingleBranch, k.RecurseSubmodules)
+}
+
+func (k *KanikoGitOptions) Set(s string) error {
+	var parts = strings.SplitN(s, "=", 2)
+	if len(parts) != 2 {
+		return fmt.Errorf("%w: %s", ErrInvalidGitFlag, s)
+	}
+	switch parts[0] {
+	case "branch":
+		k.Branch = parts[1]
+	case "single-branch":
+		v, err := strconv.ParseBool(parts[1])
+		if err != nil {
+			return err
+		}
+		k.SingleBranch = v
+	case "recurse-submodules":
+		v, err := strconv.ParseBool(parts[1])
+		if err != nil {
+			return err
+		}
+		k.RecurseSubmodules = v
+	}
+	return nil
+}
+
 // WarmerOptions are options that are set by command line arguments to the cache warmer.
 type WarmerOptions struct {
 	CacheOptions

pkg/config/options_test.go

@@ -0,0 +1,37 @@
+package config
+
+import (
+	"testing"
+
+	"github.com/GoogleContainerTools/kaniko/testutil"
+)
+
+func TestKanikoGitOptions(t *testing.T) {
+	t.Run("invalid pair", func(t *testing.T) {
+		var g = &KanikoGitOptions{}
+		testutil.CheckError(t, true, g.Set("branch"))
+	})
+
+	t.Run("sets values", func(t *testing.T) {
+		var g = &KanikoGitOptions{}
+		testutil.CheckNoError(t, g.Set("branch=foo"))
+		testutil.CheckNoError(t, g.Set("recurse-submodules=true"))
+		testutil.CheckNoError(t, g.Set("single-branch=true"))
+		testutil.CheckDeepEqual(t, KanikoGitOptions{
+			Branch:            "foo",
+			SingleBranch:      true,
+			RecurseSubmodules: true,
+		}, *g)
+	})
+
+	t.Run("sets bools other than true", func(t *testing.T) {
+		var g = KanikoGitOptions{}
+		testutil.CheckError(t, true, g.Set("recurse-submodules="))
+		testutil.CheckError(t, true, g.Set("single-branch=zaza"))
+		testutil.CheckNoError(t, g.Set("recurse-submodules=false"))
+		testutil.CheckDeepEqual(t, KanikoGitOptions{
+			SingleBranch:      false,
+			RecurseSubmodules: false,
+		}, g)
+	})
+}