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
 }