#!/bin/sh
if ! [ "$DID_SELF_UPDATE" ]
then
    GIT_WORK_TREE=. git checkout -f master -- hooks/post-receive
    DID_SELF_UPDATE=y exec hooks/post-receive
fi
exec >&2

GIT_WORK_TREE=. git checkout -f master -- authorized_keys.d/\*

if [ "$SSH_USER_AUTH" ] && [ -f "$SSH_USER_AUTH" ]
then
    read authtype keytype keyval < "$SSH_USER_AUTH"
    [ "$authtype" = publickey ] || exit

    user=
    for keyname in authorized_keys.d/*
    do
        while read a b _
        do
            case "$a $b" in
                "$keytype $keyval")
                    user=${keyname#authorized_keys.d/}
                    break
                    ;;
            esac
        done < "$keyname"
    done

    if [ "$user" ]
    then
        echo "user=$user"
    fi

else
    echo "\$SSH_USER_AUTH missing.  Try putting 'ExposeAuthInfo yes' in /etc/ssh/sshd_config"
fi