#!/bin/bash

set -e

. ./OPTIONS.sh

scriptname=$1
shift

if [ -z "$scriptname" ]; then
    echo "Run with a fetch script as an argument:"
    (cd fetch-scripts && ls)
    exit 1
fi

if ! [ -e fetch-scripts/"$scriptname" ]; then
    echo "Unknown fetch script $scriptname"
    exit 1
fi

mkdir -p "$MIRRORDIR/.locks"

# Save a copy of stdout on FD 3, so we can get it back again
exec 3>&1

logname="$MIRRORDIR/.logs/$scriptname-$(date +"%F-%R:%S").log"

exec >> "$logname" 2>&1
date +"Starting $scriptname: %c"

#NB: -r is number of retries, at 8 second intervals
if lockfile -r 900 "$MIRRORDIR/.locks/$scriptname"; then
    date +"Received lock: %c"
    (. fetch-scripts/"$scriptname")
    exitstatus=$?
    rm -f "$MIRRORDIR/.locks/$scriptname"
fi

date +"Done: %c"
if [ $exitstatus -ne 0 ]; then
    exec 1>&3 # Restore stdout
    echo "Synchronization of $scriptname failed:"
    echo "(last 100 lines)"
    echo
    tail -n 100 "$logname"
fi
exit $exitstatus