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

@@ -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/${what_name}-Patches"
+    if [ "$nofilter" == "0" ]; then
         cleanupPatches "$basedir/${what_name}-Patches"
+    fi
     echo "  Patches saved for $what to $what_name-Patches/"
 }
 

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
 )