ignore unsupported git optionsunsupported-options

It seems that git can send all sorts of options to the remote
backends.  We don't support any, yet we should at least not crash.

The example I stumbled upon is `push.sign=ifAsked` in the config,
which translated into the `--sign=ifAsked` option, as in [this bug
report](https://git-annex.branchable.com/bugs/gcrypt_repository_not_found/). I
haven't tested if it works and the code is rather ugly, but let's take
this as a proof of concept for now.

1 files changed, 19 insertions, 1 deletions

diff --git a/git-remote-gcrypt b/git-remote-gcrypt
index ba75f09..3d4cec5 100755
--- a/git-remote-gcrypt
+++ b/git-remote-gcrypt
@@ -934,5 +934,23 @@ then
 		exit 100
 	fi
 else
-	gcrypt_main_loop "$@"
+	for i
+	do
+	    case "$1" in
+	    -*)
+	        # ignore arbitrary options passed by git
+	        shift
+	        ;;
+	    *)
+	        # first argument is name, second is url
+	        if [ -n "$name" ]; then
+	            name="$1"
+		else
+		    url="$1"
+		fi
+	        shift
+	        ;;
+	    esac
+	done
+	gcrypt_main_loop "$name" "$url"
 fi