update: copy PKGBUILD into tracedir

leaf

@@ -48,9 +48,17 @@ main() {
       prepare|build|install|force-install|remove|pack|dirct-install)
         leaf_check_permission
         for _item in "${@:2}"; do
+          if [[ x"$1" == x"remove" ]]; then
+            leaf_find_remove_pkgbuild "${_item}"
+          else
             leaf_find_pkgbuild "${_item}"
+          fi
           leaf_reset_state
+          if [[ x"$1" == x"remove" ]]; then
+            source "${TRACE_DIR}/${PKG_PREFIX}/${PKG_NAME}/PKGBUILD"
+          else
             source "${PKGBUILD_DIR}/${PKG_PREFIX}/${PKG_NAME}".PKGBUILD
+          fi
           leaf_parse_options
           srcdir="${BUILD_DIR}/${PKG_PREFIX}/${PKG_NAME}"
           pkgdir="${srcdir}"/__pkgdir__
@@ -177,6 +185,18 @@ leaf_find_pkgbuild() {
   fi
 }
 
+leaf_find_remove_pkgbuild() {
+  local _location="$(find "${TRACE_DIR}" -type d -wholename "*$1*" -printf "%P\n")"
+  if [ -z "${_location}" ]; then
+    leaf_error "Package $1 does NOT exist"
+  elif [[ $(echo "${_location}" | wc -l) == 1 ]]; then
+    PKG_PREFIX="$(echo "${_location}" | awk -F'/' '{print $1}')"
+    PKG_NAME="$(echo "${_location%.PKGBUILD}" | awk -F'/' '{print $2}')"
+  else
+    leaf_error "Ambiguous packages, the prefix or version of package must be specified"
+  fi
+}
+
 leaf_invoke_hooks() {
   local _hook _target _hook_dir
   local _trace_dir="${TRACE_DIR}/${PKG_PREFIX}/${PKG_NAME}"
@@ -362,6 +382,7 @@ leaf_trace_package() {
   find . -type f | sort > "${_trace_dir}"/FILES
   find . -type l | sort > "${_trace_dir}"/LINKS
   sed -i "s/.//" "${_trace_dir}"/{DIRS,FILES,LINKS}
+  install -vm644 "${PKGBUILD_DIR}/${PKG_PREFIX}/${PKG_NAME}.PKGBUILD" "${_trace_dir}/PKGBUILD"
   popd > /dev/null 2>&1
 }