vendor: update buildkit to v0.19.0-rc1

Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>

vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp/client.go

@@ -14,6 +14,7 @@ import (
 	"net/http"
 	"net/url"
 	"strconv"
+	"strings"
 	"sync"
 	"time"
 
@@ -151,7 +152,7 @@ func (d *client) UploadTraces(ctx context.Context, protoSpans []*tracepb.Resourc
 		resp, err := d.client.Do(request.Request)
 		var urlErr *url.Error
 		if errors.As(err, &urlErr) && urlErr.Temporary() {
-			return newResponseError(http.Header{})
+			return newResponseError(http.Header{}, err)
 		}
 		if err != nil {
 			return err
@@ -198,11 +199,27 @@ func (d *client) UploadTraces(ctx context.Context, protoSpans []*tracepb.Resourc
 			sc == http.StatusBadGateway,
 			sc == http.StatusServiceUnavailable,
 			sc == http.StatusGatewayTimeout:
-			// Retry-able failures.  Drain the body to reuse the connection.
-			if _, err := io.Copy(io.Discard, resp.Body); err != nil {
-				otel.Handle(err)
+			// Retry-able failures.
+			rErr := newResponseError(resp.Header, nil)
+
+			// server may return a message with the response
+			// body, so we read it to include in the error
+			// message to be returned. It will help in
+			// debugging the actual issue.
+			var respData bytes.Buffer
+			if _, err := io.Copy(&respData, resp.Body); err != nil {
+				_ = resp.Body.Close()
+				return err
 			}
-			return newResponseError(resp.Header)
+
+			// overwrite the error message with the response body
+			// if it is not empty
+			if respStr := strings.TrimSpace(respData.String()); respStr != "" {
+				// Include response for context.
+				e := errors.New(respStr)
+				rErr = newResponseError(resp.Header, e)
+			}
+			return rErr
 		default:
 			return fmt.Errorf("failed to send to %s: %s", request.URL, resp.Status)
 		}
@@ -291,24 +308,50 @@ func (r *request) reset(ctx context.Context) {
 // retryableError represents a request failure that can be retried.
 type retryableError struct {
 	throttle int64
+	err      error
 }
 
 // newResponseError returns a retryableError and will extract any explicit
-// throttle delay contained in headers.
-func newResponseError(header http.Header) error {
+// throttle delay contained in headers. The returned error wraps wrapped
+// if it is not nil.
+func newResponseError(header http.Header, wrapped error) error {
 	var rErr retryableError
 	if s, ok := header["Retry-After"]; ok {
 		if t, err := strconv.ParseInt(s[0], 10, 64); err == nil {
 			rErr.throttle = t
 		}
 	}
+
+	rErr.err = wrapped
 	return rErr
 }
 
 func (e retryableError) Error() string {
+	if e.err != nil {
+		return fmt.Sprintf("retry-able request failure: %s", e.err.Error())
+	}
+
 	return "retry-able request failure"
 }
 
+func (e retryableError) Unwrap() error {
+	return e.err
+}
+
+func (e retryableError) As(target interface{}) bool {
+	if e.err == nil {
+		return false
+	}
+
+	switch v := target.(type) {
+	case **retryableError:
+		*v = &e
+		return true
+	default:
+		return false
+	}
+}
+
 // evaluate returns if err is retry-able. If it is and it includes an explicit
 // throttling delay, that delay is also returned.
 func evaluate(err error) (bool, time.Duration) {

vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp/doc.go

@@ -22,7 +22,7 @@ target URL to which the exporter sends telemetry.
 The value must contain a scheme ("http" or "https") and host.
 The value may additionally contain a port and a path.
 The value should not contain a query string or fragment.
-The configuration can be overridden by [WithEndpoint], [WithEndpointURL], [WitnInsecure], and [WithURLPath] options.
+The configuration can be overridden by [WithEndpoint], [WithEndpointURL], [WithInsecure], and [WithURLPath] options.
 
 OTEL_EXPORTER_OTLP_HEADERS, OTEL_EXPORTER_OTLP_TRACES_HEADERS (default: none) -
 key-value pairs used as headers associated with HTTP requests.

vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp/internal/envconfig/envconfig.go

@@ -15,6 +15,7 @@ import (
 	"strconv"
 	"strings"
 	"time"
+	"unicode"
 
 	"go.opentelemetry.io/otel/internal/global"
 )
@@ -163,12 +164,16 @@ func stringToHeader(value string) map[string]string {
 			global.Error(errors.New("missing '="), "parse headers", "input", header)
 			continue
 		}
-		name, err := url.PathUnescape(n)
-		if err != nil {
-			global.Error(err, "escape header key", "key", n)
+
+		trimmedName := strings.TrimSpace(n)
+
+		// Validate the key.
+		if !isValidHeaderKey(trimmedName) {
+			global.Error(errors.New("invalid header key"), "parse headers", "key", trimmedName)
 			continue
 		}
-		trimmedName := strings.TrimSpace(name)
+
+		// Only decode the value.
 		value, err := url.PathUnescape(v)
 		if err != nil {
 			global.Error(err, "escape header value", "value", v)
@@ -189,3 +194,22 @@ func createCertPool(certBytes []byte) (*x509.CertPool, error) {
 	}
 	return cp, nil
 }
+
+func isValidHeaderKey(key string) bool {
+	if key == "" {
+		return false
+	}
+	for _, c := range key {
+		if !isTokenChar(c) {
+			return false
+		}
+	}
+	return true
+}
+
+func isTokenChar(c rune) bool {
+	return c <= unicode.MaxASCII && (unicode.IsLetter(c) ||
+		unicode.IsDigit(c) ||
+		c == '!' || c == '#' || c == '$' || c == '%' || c == '&' || c == '\'' || c == '*' ||
+		c == '+' || c == '-' || c == '.' || c == '^' || c == '_' || c == '`' || c == '|' || c == '~')
+}

vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp/internal/otlpconfig/options.go

@@ -125,7 +125,7 @@ func NewGRPCConfig(opts ...GRPCOption) Config {
 	if cfg.ServiceConfig != "" {
 		cfg.DialOptions = append(cfg.DialOptions, grpc.WithDefaultServiceConfig(cfg.ServiceConfig))
 	}
-	// Priroritize GRPCCredentials over Insecure (passing both is an error).
+	// Prioritize GRPCCredentials over Insecure (passing both is an error).
 	if cfg.Traces.GRPCCredentials != nil {
 		cfg.DialOptions = append(cfg.DialOptions, grpc.WithTransportCredentials(cfg.Traces.GRPCCredentials))
 	} else if cfg.Traces.Insecure {

vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp/options.go

@@ -62,8 +62,10 @@ func (w wrappedOption) applyHTTPOption(cfg otlpconfig.Config) otlpconfig.Config
 //
 // If the OTEL_EXPORTER_OTLP_ENDPOINT or OTEL_EXPORTER_OTLP_TRACES_ENDPOINT
 // environment variable is set, and this option is not passed, that variable
-// value will be used. If both are set, OTEL_EXPORTER_OTLP_TRACES_ENDPOINT
-// will take precedence. Note, both environment variables include the full
+// value will be used. If both environment variables are set,
+// OTEL_EXPORTER_OTLP_TRACES_ENDPOINT will take precedence. If an environment
+// variable is set, and this option is passed, this option will take precedence.
+// Note, both environment variables include the full
 // scheme and path, while WithEndpoint sets only the host and port.
 //
 // If both this option and WithEndpointURL are used, the last used option will
@@ -82,8 +84,9 @@ func WithEndpoint(endpoint string) Option {
 //
 // If the OTEL_EXPORTER_OTLP_ENDPOINT or OTEL_EXPORTER_OTLP_TRACES_ENDPOINT
 // environment variable is set, and this option is not passed, that variable
-// value will be used. If both are set, OTEL_EXPORTER_OTLP_TRACES_ENDPOINT
-// will take precedence.
+// value will be used. If both environment variables are set,
+// OTEL_EXPORTER_OTLP_TRACES_ENDPOINT will take precedence. If an environment
+// variable is set, and this option is passed, this option will take precedence.
 //
 // If both this option and WithEndpoint are used, the last used option will
 // take precedence.