@@ -31,7 +31,7 @@ Imports:

     ggfun,

     yulab.utils,

     tidyr,

-    tidytree (>= 0.2.6),

+    tidytree (>= 0.3.9),

     treeio (>= 1.8.0),

     utils,

     scales

@@ -262,6 +262,7 @@ importFrom(methods,is)

 importFrom(methods,missingArg)

 importFrom(methods,setGeneric)

 importFrom(methods,setOldClass)

+importFrom(pillar,style_subtle)

 importFrom(rlang,.data)

 importFrom(rlang,abort)

 importFrom(rlang,as_name)

@@ -1,14 +1,8 @@

 ##' @importFrom utils packageDescription

 .onAttach <- function(libname, pkgname) {

-    pkgVersion <- packageDescription(pkgname, fields="Version")

-    msg <- paste0(pkgname, " v", pkgVersion, "  ",

-                  "For help: https://yulab-smu.top/treedata-book/", "\n\n")

-

-    citation <- paste0("If you use ", pkgname,

-                       " in published research, please cite the most appropriate paper(s):\n\n",

-                       ggtree_citations(), "\n")

-

-    packageStartupMessage(paste0(msg, citation))

+    pkgVersion <- packageDescription(pkgname, fields = "Version")

+    ref <- random_ref(pkgname = pkgname, pkgVersion = pkgVersion, random_n = 2)

+    if (!is.null(ref)) packageStartupMessage(ref)

 }

-

+random_ref <- getFromNamespace("random_ref", 'tidytree')