#!/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

WARNINGS=y

warn()
{
    if [ "$WARNINGS" ]
    then
        printf '%s: Warning: %s\n' "$0" "$*" >&2
    fi
}

GET_NOMIC_USER()
{
    if [ "$NOMIC_USER" ]
    then
        return
    elif [ "$SSH_USER_AUTH" ] && [ -f "$SSH_USER_AUTH" ]
    then
        read authtype keytype keyval < "$SSH_USER_AUTH"
        [ "$authtype" = publickey ] || exit

        for keyname in authorized_keys.d/*
        do
            while read a b _
            do
                case "$a $b" in
                    "$keytype $keyval")
                        NOMIC_USER=${keyname#authorized_keys.d/}
                        break
                        ;;
                esac
            done < "$keyname"
        done
        true
    else
        warn "\$SSH_USER_AUTH missing.  Try putting 'ExposeAuthInfo yes' in /etc/ssh/sshd_config"
        false
    fi
}

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

if GET_NOMIC_USER
then
    warn "NOMIC_USER=$NOMIC_USER"
fi