Paper/scripts/upstreamCommit.sh

#!/usr/bin/env bash
(
set -e
PS1="$"

function changelog() {
    base=$(git ls-tree HEAD $1  | cut -d' ' -f3 | cut -f1)
    cd $1 && git log --oneline ${base}...HEAD | sed -E 's/(^[0-9a-f]{8,}( SPIGOT-[0-9]{1,4},?)* |Revert ")#([0-9]+)/\1PR-\3/'
}
bukkit=$(changelog work/Bukkit)
cb=$(changelog work/CraftBukkit)
spigot=$(changelog work/Spigot)

updated=""
logsuffix=""
if [ ! -z "$bukkit" ]; then
    logsuffix="$logsuffix\n\nBukkit Changes:\n$bukkit"
    updated="Bukkit"
fi
if [ ! -z "$cb" ]; then
    logsuffix="$logsuffix\n\nCraftBukkit Changes:\n$cb"
    if [ -z "$updated" ]; then updated="CraftBukkit"; else updated="$updated/CraftBukkit"; fi
fi
if [ ! -z "$spigot" ]; then
    logsuffix="$logsuffix\n\nSpigot Changes:\n$spigot"
    if [ -z "$updated" ]; then updated="Spigot"; else updated="$updated/Spigot"; fi
fi
disclaimer="Upstream has released updates that appear to apply and compile correctly.\nThis update has not been tested by PaperMC and as with ANY update, please do your own testing"

if [ ! -z "$1" ]; then
    disclaimer="$@"
fi

log="${UP_LOG_PREFIX}Updated Upstream ($updated)\n\n${disclaimer}${logsuffix}"

echo -e "$log" | git commit -F -

) || exit 1