vendor: update buildkit to v0.14.0-rc1

Update buildkit dependency to v0.14.0-rc1. Update the tracing
infrastructure to use the new detect API which updates how the delegated
exporter is configured.

Signed-off-by: Jonathan A. Sternberg <jonathan.sternberg@docker.com>

vendor/github.com/moby/buildkit/frontend/dockerfile/parser/directives.go

@@ -13,12 +13,14 @@ import (
 
 const (
 	keySyntax = "syntax"
+	keyCheck  = "check"
 	keyEscape = "escape"
 )
 
 var validDirectives = map[string]struct{}{
 	keySyntax: {},
 	keyEscape: {},
+	keyCheck:  {},
 }
 
 type Directive struct {
@@ -110,6 +112,10 @@ func (d *DirectiveParser) ParseAll(data []byte) ([]*Directive, error) {
 // This allows for a flexible range of input formats, and appropriate syntax
 // selection.
 func DetectSyntax(dt []byte) (string, string, []Range, bool) {
+	return ParseDirective(keySyntax, dt)
+}
+
+func ParseDirective(key string, dt []byte) (string, string, []Range, bool) {
 	dt, hadShebang, err := discardShebang(dt)
 	if err != nil {
 		return "", "", nil, false
@@ -119,42 +125,38 @@ func DetectSyntax(dt []byte) (string, string, []Range, bool) {
 		line++
 	}
 
-	// use default directive parser, and search for #syntax=
+	// use default directive parser, and search for #key=
 	directiveParser := DirectiveParser{line: line}
-	if syntax, cmdline, loc, ok := detectSyntaxFromParser(dt, directiveParser); ok {
+	if syntax, cmdline, loc, ok := detectDirectiveFromParser(key, dt, directiveParser); ok {
 		return syntax, cmdline, loc, true
 	}
 
-	// use directive with different comment prefix, and search for //syntax=
+	// use directive with different comment prefix, and search for //key=
 	directiveParser = DirectiveParser{line: line}
 	directiveParser.setComment("//")
-	if syntax, cmdline, loc, ok := detectSyntaxFromParser(dt, directiveParser); ok {
+	if syntax, cmdline, loc, ok := detectDirectiveFromParser(key, dt, directiveParser); ok {
 		return syntax, cmdline, loc, true
 	}
 
-	// search for possible json directives
-	var directive struct {
-		Syntax string `json:"syntax"`
-	}
-	if err := json.Unmarshal(dt, &directive); err == nil {
-		if directive.Syntax != "" {
+	// use json directive, and search for { "key": "..." }
+	jsonDirective := map[string]string{}
+	if err := json.Unmarshal(dt, &jsonDirective); err == nil {
+		if v, ok := jsonDirective[key]; ok {
 			loc := []Range{{
 				Start: Position{Line: line},
 				End:   Position{Line: line},
 			}}
-			return directive.Syntax, directive.Syntax, loc, true
+			return v, v, loc, true
 		}
 	}
 
 	return "", "", nil, false
 }
 
-func detectSyntaxFromParser(dt []byte, parser DirectiveParser) (string, string, []Range, bool) {
+func detectDirectiveFromParser(key string, dt []byte, parser DirectiveParser) (string, string, []Range, bool) {
 	directives, _ := parser.ParseAll(dt)
 	for _, d := range directives {
-		// check for syntax directive before erroring out, since the error
-		// might have occurred *after* the syntax directive
-		if d.Name == keySyntax {
+		if d.Name == key {
 			p, _, _ := strings.Cut(d.Value, " ")
 			return p, d.Value, d.Location, true
 		}

vendor/github.com/moby/buildkit/frontend/dockerfile/parser/line_parsers.go

@@ -154,7 +154,7 @@ func parseNameVal(rest string, key string, d *directives) (*Node, error) {
 		if len(parts) < 2 {
 			return nil, errors.Errorf("%s must have two arguments", key)
 		}
-		return newKeyValueNode(parts[0], parts[1]), nil
+		return newKeyValueNode(parts[0], parts[1], ""), nil
 	}
 
 	var rootNode *Node
@@ -165,17 +165,20 @@ func parseNameVal(rest string, key string, d *directives) (*Node, error) {
 		}
 
 		parts := strings.SplitN(word, "=", 2)
-		node := newKeyValueNode(parts[0], parts[1])
+		node := newKeyValueNode(parts[0], parts[1], "=")
 		rootNode, prevNode = appendKeyValueNode(node, rootNode, prevNode)
 	}
 
 	return rootNode, nil
 }
 
-func newKeyValueNode(key, value string) *Node {
+func newKeyValueNode(key, value, sep string) *Node {
 	return &Node{
 		Value: key,
-		Next:  &Node{Value: value},
+		Next: &Node{
+			Value: value,
+			Next:  &Node{Value: sep},
+		},
 	}
 }
 
@@ -187,7 +190,9 @@ func appendKeyValueNode(node, rootNode, prevNode *Node) (*Node, *Node) {
 		prevNode.Next = node
 	}
 
-	prevNode = node.Next
+	for prevNode = node.Next; prevNode.Next != nil; {
+		prevNode = prevNode.Next
+	}
 	return rootNode, prevNode
 }
 

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

@@ -32,10 +32,12 @@ func NewLex(escapeToken rune) *Lex {
 }
 
 // ProcessWord will use the 'env' list of environment variables,
-// and replace any env var references in 'word'.
-func (s *Lex) ProcessWord(word string, env []string) (string, error) {
-	word, _, err := s.process(word, BuildEnvs(env))
-	return word, err
+// and replace any env var references in 'word'. It will also
+// return variables in word which were not found in the 'env' list,
+// which is useful in later linting.
+func (s *Lex) ProcessWord(word string, env []string) (string, map[string]struct{}, error) {
+	result, err := s.process(word, BuildEnvs(env))
+	return result.Result, result.Unmatched, err
 }
 
 // ProcessWords will use the 'env' list of environment variables,
@@ -46,28 +48,40 @@ func (s *Lex) ProcessWord(word string, env []string) (string, error) {
 // Note, each one is trimmed to remove leading and trailing spaces (unless
 // they are quoted", but ProcessWord retains spaces between words.
 func (s *Lex) ProcessWords(word string, env []string) ([]string, error) {
-	_, words, err := s.process(word, BuildEnvs(env))
-	return words, err
+	result, err := s.process(word, BuildEnvs(env))
+	return result.Words, err
 }
 
 // ProcessWordWithMap will use the 'env' list of environment variables,
 // and replace any env var references in 'word'.
 func (s *Lex) ProcessWordWithMap(word string, env map[string]string) (string, error) {
-	word, _, err := s.process(word, env)
-	return word, err
+	result, err := s.process(word, env)
+	return result.Result, err
+}
+
+type ProcessWordResult struct {
+	Result    string
+	Words     []string
+	Matched   map[string]struct{}
+	Unmatched map[string]struct{}
 }
 
 // ProcessWordWithMatches will use the 'env' list of environment variables,
 // replace any env var references in 'word' and return the env that were used.
-func (s *Lex) ProcessWordWithMatches(word string, env map[string]string) (string, map[string]struct{}, error) {
+func (s *Lex) ProcessWordWithMatches(word string, env map[string]string) (ProcessWordResult, error) {
 	sw := s.init(word, env)
-	word, _, err := sw.process(word)
-	return word, sw.matches, err
+	word, words, err := sw.process(word)
+	return ProcessWordResult{
+		Result:    word,
+		Words:     words,
+		Matched:   sw.matches,
+		Unmatched: sw.nonmatches,
+	}, err
 }
 
 func (s *Lex) ProcessWordsWithMap(word string, env map[string]string) ([]string, error) {
-	_, words, err := s.process(word, env)
-	return words, err
+	result, err := s.process(word, env)
+	return result.Words, err
 }
 
 func (s *Lex) init(word string, env map[string]string) *shellWord {
@@ -79,14 +93,21 @@ func (s *Lex) init(word string, env map[string]string) *shellWord {
 		rawQuotes:         s.RawQuotes,
 		rawEscapes:        s.RawEscapes,
 		matches:           make(map[string]struct{}),
+		nonmatches:        make(map[string]struct{}),
 	}
 	sw.scanner.Init(strings.NewReader(word))
 	return sw
 }
 
-func (s *Lex) process(word string, env map[string]string) (string, []string, error) {
+func (s *Lex) process(word string, env map[string]string) (*ProcessWordResult, error) {
 	sw := s.init(word, env)
-	return sw.process(word)
+	word, words, err := sw.process(word)
+	return &ProcessWordResult{
+		Result:    word,
+		Words:     words,
+		Matched:   sw.matches,
+		Unmatched: sw.nonmatches,
+	}, err
 }
 
 type shellWord struct {
@@ -98,6 +119,7 @@ type shellWord struct {
 	skipUnsetEnv      bool
 	skipProcessQuotes bool
 	matches           map[string]struct{}
+	nonmatches        map[string]struct{}
 }
 
 func (sw *shellWord) process(source string) (string, []string, error) {
@@ -511,6 +533,7 @@ func (sw *shellWord) getEnv(name string) (string, bool) {
 			return value, true
 		}
 	}
+	sw.nonmatches[name] = struct{}{}
 	return "", false
 }