Upgrade x/sync, Prometheus client and faas-provider

Signed-off-by: Alex Ellis (OpenFaaS Ltd) <alex@openfaas.com>

gateway/vendor/google.golang.org/protobuf/internal/encoding/text/decode.go

@@ -8,7 +8,6 @@ import (
 	"bytes"
 	"fmt"
 	"io"
-	"regexp"
 	"strconv"
 	"unicode/utf8"
 
@@ -381,7 +380,7 @@ func (d *Decoder) currentOpenKind() (Kind, byte) {
 	case '[':
 		return ListOpen, ']'
 	}
-	panic(fmt.Sprintf("Decoder: openStack contains invalid byte %s", string(openCh)))
+	panic(fmt.Sprintf("Decoder: openStack contains invalid byte %c", openCh))
 }
 
 func (d *Decoder) pushOpenStack(ch byte) {
@@ -421,7 +420,7 @@ func (d *Decoder) parseFieldName() (tok Token, err error) {
 		return Token{}, d.newSyntaxError("invalid field number: %s", d.in[:num.size])
 	}
 
-	return Token{}, d.newSyntaxError("invalid field name: %s", errRegexp.Find(d.in))
+	return Token{}, d.newSyntaxError("invalid field name: %s", errId(d.in))
 }
 
 // parseTypeName parses Any type URL or extension field name. The name is
@@ -571,7 +570,7 @@ func (d *Decoder) parseScalar() (Token, error) {
 		return tok, nil
 	}
 
-	return Token{}, d.newSyntaxError("invalid scalar value: %s", errRegexp.Find(d.in))
+	return Token{}, d.newSyntaxError("invalid scalar value: %s", errId(d.in))
 }
 
 // parseLiteralValue parses a literal value. A literal value is used for
@@ -653,8 +652,29 @@ func consume(b []byte, n int) []byte {
 	return b
 }
 
-// Any sequence that looks like a non-delimiter (for error reporting).
-var errRegexp = regexp.MustCompile(`^([-+._a-zA-Z0-9\/]+|.)`)
+// errId extracts a byte sequence that looks like an invalid ID
+// (for the purposes of error reporting).
+func errId(seq []byte) []byte {
+	const maxLen = 32
+	for i := 0; i < len(seq); {
+		if i > maxLen {
+			return append(seq[:i:i], "…"...)
+		}
+		r, size := utf8.DecodeRune(seq[i:])
+		if r > utf8.RuneSelf || (r != '/' && isDelim(byte(r))) {
+			if i == 0 {
+				// Either the first byte is invalid UTF-8 or a
+				// delimiter, or the first rune is non-ASCII.
+				// Return it as-is.
+				i = size
+			}
+			return seq[:i:i]
+		}
+		i += size
+	}
+	// No delimiter found.
+	return seq
+}
 
 // isDelim returns true if given byte is a delimiter character.
 func isDelim(c byte) bool {

gateway/vendor/google.golang.org/protobuf/internal/encoding/text/decode_number.go

@@ -50,8 +50,10 @@ type number struct {
 
 // parseNumber constructs a number object from given input. It allows for the
 // following patterns:
-//   integer: ^-?([1-9][0-9]*|0[xX][0-9a-fA-F]+|0[0-7]*)
-//   float: ^-?((0|[1-9][0-9]*)?([.][0-9]*)?([eE][+-]?[0-9]+)?[fF]?)
+//
+//	integer: ^-?([1-9][0-9]*|0[xX][0-9a-fA-F]+|0[0-7]*)
+//	float: ^-?((0|[1-9][0-9]*)?([.][0-9]*)?([eE][+-]?[0-9]+)?[fF]?)
+//
 // It also returns the number of parsed bytes for the given number, 0 if it is
 // not a number.
 func parseNumber(input []byte) number {

gateway/vendor/google.golang.org/protobuf/internal/encoding/text/doc.go

@@ -24,6 +24,6 @@
 // the Go implementation should as well.
 //
 // The text format is almost a superset of JSON except:
-//	* message keys are not quoted strings, but identifiers
-//	* the top-level value must be a message without the delimiters
+//   - message keys are not quoted strings, but identifiers
+//   - the top-level value must be a message without the delimiters
 package text

gateway/vendor/google.golang.org/protobuf/internal/encoding/text/encode.go

@@ -263,3 +263,8 @@ func (e *Encoder) Snapshot() encoderState {
 func (e *Encoder) Reset(es encoderState) {
 	e.encoderState = es
 }
+
+// AppendString appends the escaped form of the input string to b.
+func AppendString(b []byte, s string) []byte {
+	return appendString(b, s, false)
+}