1 files changed, 17 insertions, 0 deletions
diff --git a/lib/common-functions b/lib/common-functions
index b29379b..cd938f8 100755
--- a/lib/common-functions
+++ b/lib/common-functions
@@ -891,3 +891,20 @@ failsafe_rsync() {
   done
   return 1
 }
+
+# apply_trunk_patch source_dir diff_source_dir
+# apply a patch between diff_source_dir/PKGBUILD and
+# diff_source_dir/../../trunk/PKGBUILD onto source_dir/PKGBUILD
+apply_trunk_patch() {
+  local source_dir="$1"
+  local diff_source_dir="$2"
+  if [ -z "${diff_source_dir}" ]; then
+    # no diff_source_dir => no action
+    return
+  fi
+  diff -u3 "${diff_source_dir}/PKGBUILD" "${diff_source_dir}/../../trunk/PKGBUILD" \
+    | sed '
+      1,2 s#^\(\(+++\|---\)\s\+\)\S\+/\(PKGBUILD\s.*\)$#\1\3#
+    ' \
+    | patch -p0 "${source_dir}/PKGBUILD"
+}