SEBA-829 update cordctl to use go mod;
implement run, install, help

Change-Id: I72716d2e245d5ef0dc0603aad149843723ddff9e
diff --git a/vendor/github.com/jhump/protoreflect/desc/protoparse/errors.go b/vendor/github.com/jhump/protoreflect/desc/protoparse/errors.go
new file mode 100644
index 0000000..07a6214
--- /dev/null
+++ b/vendor/github.com/jhump/protoreflect/desc/protoparse/errors.go
@@ -0,0 +1,103 @@
+package protoparse
+
+import (
+	"errors"
+	"fmt"
+)
+
+// ErrInvalidSource is a sentinel error that is returned by calls to
+// Parser.ParseFiles and Parser.ParseFilesButDoNotLink in the event that syntax
+// or link errors are encountered, but the parser's configured ErrorReporter
+// always returns nil.
+var ErrInvalidSource = errors.New("parse failed: invalid proto source")
+
+// ErrorReporter is responsible for reporting the given error. If the reporter
+// returns a non-nil error, parsing/linking will abort with that error. If the
+// reporter returns nil, parsing will continue, allowing the parser to try to
+// report as many syntax and/or link errors as it can find.
+type ErrorReporter func(err ErrorWithPos) error
+
+func defaultErrorReporter(err ErrorWithPos) error {
+	// abort parsing after first error encountered
+	return err
+}
+
+type errorHandler struct {
+	reporter     ErrorReporter
+	errsReported bool
+	err          error
+}
+
+func newErrorHandler(reporter ErrorReporter) *errorHandler {
+	if reporter == nil {
+		reporter = defaultErrorReporter
+	}
+	return &errorHandler{
+		reporter: reporter,
+	}
+}
+
+func (h *errorHandler) handleError(err error) error {
+	if h.err != nil {
+		return h.err
+	}
+	if ewp, ok := err.(ErrorWithPos); ok {
+		h.errsReported = true
+		err = h.reporter(ewp)
+	}
+	h.err = err
+	return err
+}
+
+func (h *errorHandler) getError() error {
+	if h.errsReported && h.err == nil {
+		return ErrInvalidSource
+	}
+	return h.err
+}
+
+// ErrorWithPos is an error about a proto source file that includes information
+// about the location in the file that caused the error.
+//
+// The value of Error() will contain both the SourcePos and Underlying error.
+// The value of Unwrap() will only be the Underlying error.
+type ErrorWithPos interface {
+	error
+	GetPosition() SourcePos
+	Unwrap() error
+}
+
+// ErrorWithSourcePos is an error about a proto source file that includes
+// information about the location in the file that caused the error.
+//
+// Errors that include source location information *might* be of this type.
+// However, calling code that is trying to examine errors with location info
+// should instead look for instances of the ErrorWithPos interface, which
+// will find other kinds of errors. This type is only exported for backwards
+// compatibility.
+type ErrorWithSourcePos struct {
+	Underlying error
+	Pos        *SourcePos
+}
+
+// Error implements the error interface
+func (e ErrorWithSourcePos) Error() string {
+	if e.Pos.Line <= 0 || e.Pos.Col <= 0 {
+		return fmt.Sprintf("%s: %v", e.Pos.Filename, e.Underlying)
+	}
+	return fmt.Sprintf("%s:%d:%d: %v", e.Pos.Filename, e.Pos.Line, e.Pos.Col, e.Underlying)
+}
+
+// GetPosition implements the ErrorWithPos interface, supplying a location in
+// proto source that caused the error.
+func (e ErrorWithSourcePos) GetPosition() SourcePos {
+	return *e.Pos
+}
+
+// Unwrap implements the ErrorWithPos interface, supplying the underlying
+// error. This error will not include location information.
+func (e ErrorWithSourcePos) Unwrap() error {
+	return e.Underlying
+}
+
+var _ ErrorWithPos = ErrorWithSourcePos{}