feat: check dummy function, do not echo

leaf

@@ -363,29 +363,38 @@ leaf_remove_libtool_files() {
   find "${pkgdir}" -name "*.la" -delete
 }
 
+leaf_noop() { :; }
+
 leaf_reset_state() {
   options=()
-  src_preinstall() {
-    :
-  }
-  src_postinstall() {
-    :
-  }
-  src_preremove() {
-    :
-  }
-  src_postremove() {
-    :
-  }
-  src_prepare() {
-    :
-  }
-  src_build() {
-    :
-  }
-  src_check() {
-    :
-  }
+  src_preinstall() { leaf_noop; }
+  src_postinstall() { leaf_noop; }
+  src_preremove() { leaf_noop; }
+  src_postremove() { leaf_noop; }
+
+  src_prepare() { leaf_noop; }
+  src_build() { leaf_noop; }
+  src_check() { leaf_noop; }
+  src_install() { leaf_noop; }
+}
+
+leaf_is_noop_func() {
+  # usage: leaf_is_noop_func <funcname>
+  local fn="$1" body
+
+  declare -F "$fn" >/dev/null || return 0
+
+  body="$(declare -f "$fn" \
+    | sed -n '0,/{/d; :a; /}/q; p; n; ba')"
+
+  body="$(printf '%s' "$body" | tr -d '[:space:]' | tr -d ';')"
+
+  # allowd no-op form: leaf_noop, :, true
+  case "$body" in
+    leaf_noop|:|true) return 0 ;;
+  esac
+
+  return 1
 }
 
 leaf_strip_files() {
@@ -463,6 +472,11 @@ leaf_run_phase() {
     return 0
   }
 
+  if leaf_is_noop_func "$fn"; then
+    LEAF_PHASE_RC=0
+    return 0
+  fi
+
   echo -e "${GREEN_COLOR}>>> ${PKG_PREFIX}/${PKG_NAME}: ${phase}${CLEAR_COLOR}"
 
   set +e