chore: rename PrintFunc to CallFunc

Signed-off-by: CrazyMax <1951866+crazy-max@users.noreply.github.com>

util/buildflags/callfunc.go

@@ -0,0 +1,59 @@
+package buildflags
+
+import (
+	"strconv"
+	"strings"
+
+	controllerapi "github.com/docker/buildx/controller/pb"
+	"github.com/pkg/errors"
+	"github.com/tonistiigi/go-csvvalue"
+)
+
+const defaultCallFunc = "build"
+
+func ParseCallFunc(str string) (*controllerapi.CallFunc, error) {
+	if str == "" {
+		return nil, nil
+	}
+
+	fields, err := csvvalue.Fields(str, nil)
+	if err != nil {
+		return nil, err
+	}
+	f := &controllerapi.CallFunc{}
+	for _, field := range fields {
+		parts := strings.SplitN(field, "=", 2)
+		if len(parts) == 2 {
+			switch parts[0] {
+			case "format":
+				f.Format = parts[1]
+			case "ignorestatus":
+				v, err := strconv.ParseBool(parts[1])
+				if err != nil {
+					return nil, errors.Wrapf(err, "invalid ignorestatus print value: %s", parts[1])
+				}
+				f.IgnoreStatus = v
+			default:
+				return nil, errors.Errorf("invalid print field: %s", field)
+			}
+		} else {
+			if f.Name != "" {
+				return nil, errors.Errorf("invalid print value: %s", str)
+			}
+			f.Name = field
+		}
+	}
+
+	// "check" has been added as an alias for "lint",
+	// in order to maintain backwards compatibility
+	// we need to convert it.
+	if f.Name == "check" {
+		f.Name = "lint"
+	}
+
+	if f.Name == defaultCallFunc {
+		return nil, nil
+	}
+
+	return f, nil
+}