Add Cobra-backed command parsing

parser_test.go

@@ -0,0 +1,50 @@
+package commandkit
+
+import (
+	"context"
+	"reflect"
+	"testing"
+
+	internalcobra "gitea.maximumdirect.net/eric/CommandKit/internal/cobra"
+)
+
+func TestAppParseUsesRegisteredBindingsWithTheAdapter(t *testing.T) {
+	type input struct {
+		scope Supplied[string]
+		id    Supplied[string]
+	}
+	show, err := NewCommand(CommandSpec[input]{
+		Name: "show",
+		Flags: []Flag[input]{ValueFlag(FlagMeta{Name: "scope"}, (*string)(nil), func(value string) (string, error) {
+			return value, nil
+		}, func(value *input, supplied Supplied[string]) { value.scope = supplied })},
+		Arguments: []Argument[input]{ValueArgument(ArgumentMeta{Name: "id"}, true, func(value string) (string, error) {
+			return value, nil
+		}, func(value *input, supplied Supplied[string]) { value.id = supplied })},
+		Run: func(Invocation, input) Outcome { return Success() },
+	})
+	if err != nil {
+		t.Fatal(err)
+	}
+	config, err := Group("config", "configuration", show)
+	if err != nil {
+		t.Fatal(err)
+	}
+	app, err := New(Identity{Name: "example"}, config)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	options := internalcobra.ParseOptions{Context: context.Background()}
+	result := app.parse([]string{"config", "show", "one", "--scope", "app"}, options)
+	if result.Failure != nil {
+		t.Fatalf("parse failed: %s", result.Failure.Message)
+	}
+	if !reflect.DeepEqual(result.Path, []string{"config", "show"}) || !reflect.DeepEqual(result.FlagValues, [][]string{{"app"}}) || !reflect.DeepEqual(result.Operands, []string{"one"}) {
+		t.Fatalf("parse result = %#v", result)
+	}
+	result = app.parse([]string{"config", "--scope", "app", "show"}, options)
+	if result.Failure == nil {
+		t.Fatal("accepted a child flag before the complete command path")
+	}
+}