fix windows install status

Author: Miachol

ChangeLog

@@ -1,3 +1,7 @@
+2017-06-24 Li Jianfeng <lee_jianfeng@sjtu.edu.cn>
+
+		* Fix windows install status
+
 2017-06-23 Li Jianfeng <lee_jianfeng@sjtu.edu.cn>
 
 		* Cancel windows install step (Download still work)

DESCRIPTION

@@ -1,6 +1,6 @@
 Package: BioInstaller 
 Title: Lightweight Biology Software Installer
-Version: 0.1.2
+Version: 0.1.2.1
 Authors@R: person("Jianfeng", "Li", email = "lee_jianfeng@sjtu.edu.cn", role = c("aut", "cre"))
 Description:
     Can be used to install and download massive bioinformatics analysis softwares and databases, such as NGS reads mapping tools with its required databases.

R/utils_function.R

@@ -68,6 +68,9 @@ runcmd <- function(cmd, verbose = TRUE) {
 
 # Run a group of cmd
 for_runcmd <- function(cmd_vector, verbose = TRUE) {
+  if (is.null(cmd_vector)) {
+    return(0)
+  }
   status.vector <- NULL
   for (i in cmd_vector) {
     if (i != "") {