Remove armhf/armv7 support from faasd

See notes in: #364

Signed-off-by: Alex Ellis (OpenFaaS Ltd) <alexellis2@gmail.com>

vendor/github.com/Microsoft/hcsshim/internal/oc/errors.go

@@ -0,0 +1,69 @@
+package oc
+
+import (
+	"errors"
+	"io"
+	"net"
+	"os"
+
+	"github.com/containerd/containerd/errdefs"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/status"
+)
+
+// todo: break import cycle with "internal/hcs/errors.go" and reference errors defined there
+// todo: add errors defined in "internal/guest/gcserror" (Hresult does not implement error)
+
+func toStatusCode(err error) codes.Code {
+	// checks if err implements GRPCStatus() *"google.golang.org/grpc/status".Status,
+	// wraps an error defined in "github.com/containerd/containerd/errdefs", or is a
+	// context timeout or cancelled error
+	if s, ok := status.FromError(errdefs.ToGRPC(err)); ok {
+		return s.Code()
+	}
+
+	switch {
+	// case isAny(err):
+	// 	return codes.Cancelled
+	case isAny(err, os.ErrInvalid):
+		return codes.InvalidArgument
+	case isAny(err, os.ErrDeadlineExceeded):
+		return codes.DeadlineExceeded
+	case isAny(err, os.ErrNotExist):
+		return codes.NotFound
+	case isAny(err, os.ErrExist):
+		return codes.AlreadyExists
+	case isAny(err, os.ErrPermission):
+		return codes.PermissionDenied
+	// case isAny(err):
+	// 	return codes.ResourceExhausted
+	case isAny(err, os.ErrClosed, net.ErrClosed, io.ErrClosedPipe, io.ErrShortBuffer):
+		return codes.FailedPrecondition
+	// case isAny(err):
+	// 	return codes.Aborted
+	// case isAny(err):
+	// 	return codes.OutOfRange
+	// case isAny(err):
+	// 	return codes.Unimplemented
+	case isAny(err, io.ErrNoProgress):
+		return codes.Internal
+	// case isAny(err):
+	// 	return codes.Unavailable
+	case isAny(err, io.ErrShortWrite, io.ErrUnexpectedEOF):
+		return codes.DataLoss
+	// case isAny(err):
+	// 	return codes.Unauthenticated
+	default:
+		return codes.Unknown
+	}
+}
+
+// isAny returns true if errors.Is is true for any of the provided errors, errs.
+func isAny(err error, errs ...error) bool {
+	for _, e := range errs {
+		if errors.Is(err, e) {
+			return true
+		}
+	}
+	return false
+}