vendor: update buildkit to v0.16.0-rc1

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

vendor/github.com/moby/buildkit/frontend/dockerfile/linter/linter.go

@@ -10,42 +10,61 @@ import (
 )
 
 type Config struct {
-	Warn          LintWarnFunc
-	SkipRules     []string
-	SkipAll       bool
-	ReturnAsError bool
+	ExperimentalAll   bool
+	ExperimentalRules []string
+	ReturnAsError     bool
+	SkipAll           bool
+	SkipRules         []string
+	Warn              LintWarnFunc
 }
 
 type Linter struct {
-	SkippedRules  map[string]struct{}
-	CalledRules   []string
-	SkipAll       bool
-	ReturnAsError bool
-	Warn          LintWarnFunc
+	CalledRules       []string
+	ExperimentalAll   bool
+	ExperimentalRules map[string]struct{}
+	ReturnAsError     bool
+	SkipAll           bool
+	SkippedRules      map[string]struct{}
+	Warn              LintWarnFunc
 }
 
 func New(config *Config) *Linter {
 	toret := &Linter{
-		SkippedRules: map[string]struct{}{},
-		CalledRules:  []string{},
-		Warn:         config.Warn,
+		SkippedRules:      map[string]struct{}{},
+		ExperimentalRules: map[string]struct{}{},
+		CalledRules:       []string{},
+		Warn:              config.Warn,
 	}
 	toret.SkipAll = config.SkipAll
+	toret.ExperimentalAll = config.ExperimentalAll
 	toret.ReturnAsError = config.ReturnAsError
 	for _, rule := range config.SkipRules {
 		toret.SkippedRules[rule] = struct{}{}
 	}
+	for _, rule := range config.ExperimentalRules {
+		toret.ExperimentalRules[rule] = struct{}{}
+	}
 	return toret
 }
 
 func (lc *Linter) Run(rule LinterRuleI, location []parser.Range, txt ...string) {
-	if lc == nil || lc.Warn == nil || lc.SkipAll || rule.IsDeprecated() {
+	if lc == nil || lc.Warn == nil || rule.IsDeprecated() {
 		return
 	}
+
 	rulename := rule.RuleName()
-	if _, ok := lc.SkippedRules[rulename]; ok {
-		return
+	if rule.IsExperimental() {
+		_, experimentalOk := lc.ExperimentalRules[rulename]
+		if !(lc.ExperimentalAll || experimentalOk) {
+			return
+		}
+	} else {
+		_, skipOk := lc.SkippedRules[rulename]
+		if lc.SkipAll || skipOk {
+			return
+		}
 	}
+
 	lc.CalledRules = append(lc.CalledRules, rulename)
 	rule.Run(lc.Warn, location, txt...)
 }
@@ -72,14 +91,16 @@ type LinterRuleI interface {
 	RuleName() string
 	Run(warn LintWarnFunc, location []parser.Range, txt ...string)
 	IsDeprecated() bool
+	IsExperimental() bool
 }
 
 type LinterRule[F any] struct {
-	Name        string
-	Description string
-	Deprecated  bool
-	URL         string
-	Format      F
+	Name         string
+	Description  string
+	Deprecated   bool
+	Experimental bool
+	URL          string
+	Format       F
 }
 
 func (rule *LinterRule[F]) RuleName() string {
@@ -98,6 +119,10 @@ func (rule *LinterRule[F]) IsDeprecated() bool {
 	return rule.Deprecated
 }
 
+func (rule *LinterRule[F]) IsExperimental() bool {
+	return rule.Experimental
+}
+
 func LintFormatShort(rulename, msg string, line int) string {
 	msg = fmt.Sprintf("%s: %s", rulename, msg)
 	if line > 0 {
@@ -114,9 +139,9 @@ func ParseLintOptions(checkStr string) (*Config, error) {
 		return &Config{}, nil
 	}
 
-	parts := strings.SplitN(checkStr, ";", 2)
-	var skipSet []string
-	var errorOnWarn, skipAll bool
+	parts := strings.SplitN(checkStr, ";", 3)
+	var skipSet, experimentalSet []string
+	var errorOnWarn, skipAll, experimentalAll bool
 	for _, p := range parts {
 		k, v, ok := strings.Cut(p, "=")
 		if !ok {
@@ -134,6 +159,16 @@ func ParseLintOptions(checkStr string) (*Config, error) {
 					skipSet[i] = strings.TrimSpace(rule)
 				}
 			}
+		case "experimental":
+			v = strings.TrimSpace(v)
+			if v == "all" {
+				experimentalAll = true
+			} else {
+				experimentalSet = strings.Split(v, ",")
+				for i, rule := range experimentalSet {
+					experimentalSet[i] = strings.TrimSpace(rule)
+				}
+			}
 		case "error":
 			v, err := strconv.ParseBool(strings.TrimSpace(v))
 			if err != nil {
@@ -145,8 +180,10 @@ func ParseLintOptions(checkStr string) (*Config, error) {
 		}
 	}
 	return &Config{
-		SkipRules:     skipSet,
-		SkipAll:       skipAll,
-		ReturnAsError: errorOnWarn,
+		ExperimentalAll:   experimentalAll,
+		ExperimentalRules: experimentalSet,
+		SkipRules:         skipSet,
+		SkipAll:           skipAll,
+		ReturnAsError:     errorOnWarn,
 	}, nil
 }

vendor/github.com/moby/buildkit/frontend/dockerfile/linter/ruleset.go

@@ -163,5 +163,6 @@ var (
 		Format: func(cmd, file string) string {
 			return fmt.Sprintf("Attempting to %s file %q that is excluded by .dockerignore", cmd, file)
 		},
+		Experimental: true,
 	}
 )

vendor/github.com/moby/buildkit/frontend/dockerfile/shell/lex.go

@@ -378,6 +378,9 @@ func (sw *shellWord) processDollar() (string, error) {
 		fallthrough
 	case '+', '-', '?', '#', '%':
 		rawEscapes := ch == '#' || ch == '%'
+		if nullIsUnset && rawEscapes {
+			return "", errors.Errorf("unsupported modifier (%s) in substitution", chs)
+		}
 		word, _, err := sw.processStopOn('}', rawEscapes)
 		if err != nil {
 			if sw.scanner.Peek() == scanner.EOF {