From 96f8b1af6c4e06d91b82fe624cccf410a3427f99 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Tue, 2 Apr 2019 23:20:10 -0400
Subject: [PATCH] Improve upstream merge script to rebuild patches

this will help ensure that upstreams apply as cleanly as it does manually

the filtering makes the patches more fragile, but usually not an issue for small updates.

this will unfilter, apply the cleanest patches, then the next rebuild will
filter out unnecessary changes
---
 scripts/rebuildPatches.sh |  9 +++++++--
 scripts/upstreamMerge.sh  | 15 +++++++++++++++
 2 files changed, 22 insertions(+), 2 deletions(-)

diff --git a/scripts/rebuildPatches.sh b/scripts/rebuildPatches.sh
index a065d6ce59..b89ee69f50 100755
--- a/scripts/rebuildPatches.sh
+++ b/scripts/rebuildPatches.sh
@@ -8,7 +8,10 @@ source "$basedir/scripts/functions.sh"
 gitcmd="git -c commit.gpgsign=false -c core.safecrlf=false"
 
 echo "Rebuilding patch files from current fork state..."
-
+nofilter="0"
+if [ "$2" = "nofilter" ]; then
+    nofilter="1"
+fi
 function cleanupPatches {
     cd "$1"
     for patch in *.patch; do
@@ -56,7 +59,9 @@ function savePatches {
     $gitcmd format-patch --no-stat -N -o "$basedir/${what_name}-Patches/" upstream/upstream >/dev/null
     cd "$basedir"
     $gitcmd add -A "$basedir/${what_name}-Patches"
-    cleanupPatches "$basedir/${what_name}-Patches"
+    if [ "$nofilter" == "0" ]; then
+        cleanupPatches "$basedir/${what_name}-Patches"
+    fi
     echo "  Patches saved for $what to $what_name-Patches/"
 }
 
diff --git a/scripts/upstreamMerge.sh b/scripts/upstreamMerge.sh
index a54b7c10eb..d59a8b442d 100755
--- a/scripts/upstreamMerge.sh
+++ b/scripts/upstreamMerge.sh
@@ -7,11 +7,21 @@ basedir="$(cd "$1" && pwd -P)"
 workdir="$basedir/work"
 gitcmd="git -c commit.gpgsign=false"
 
+updated="0"
+function getRef {
+    git ls-tree $1 $2  | cut -d' ' -f3 | cut -f1
+}
 function update {
     cd "$workdir/$1"
     $gitcmd fetch && $gitcmd clean -fd && $gitcmd reset --hard origin/master
+    refRemote=$(git rev-parse HEAD)
     cd ../
     $gitcmd add $1
+    refHEAD=$(getRef HEAD "$workdir/$1")
+    echo "$1 $refHEAD - $refRemote"
+    if [ "$refHEAD" != "$refRemote" ]; then
+        export updated="1"
+    fi
 }
 
 update Bukkit
@@ -22,4 +32,9 @@ if [[ "$2" = "all" || "$2" = "a" ]] ; then
 	update BuildData
 	update Paperclip
 fi
+if [ "$updated" == "1" ]; then
+    echo "Rebuilding patches without filtering to improve apply ability"
+    cd "$basedir"
+    scripts/rebuildPatches.sh "$basedir" nofilter 1>/dev/null|| exit 1
+fi
 )