modify npm check method

renkun-ken · renkun-ken · commit ebb55a0d9a74 · 2014-07-30T18:05:36.000+08:00
In previous versions of node.js, default output is 0, in latest version default output is 1. Use `npm version` to check whether npm is correctly installed.
diff --git a/R/checkForGitbook.R b/R/checkForGitbook.R
@@ -6,7 +6,7 @@
 #' @param quiet logical indicating whether messages should be printed.
 #' @export
 checkForGitbook <- function(quiet=FALSE) {
-	if(system('npm', ignore.stdout=TRUE) != 0) {
+	if(system('npm version', ignore.stdout=TRUE) != 0) {
 		stop("Cannot find node.js. You can install it from http://nodejs.org/download/")
 	}
 	if(system('gitbook', ignore.stdout=TRUE) != 0) {

Original file line number	Diff line number	Diff line change
`@@ -6,7 +6,7 @@`
`6`	`6`	`#' @param quiet logical indicating whether messages should be printed.`
`7`	`7`	`#' @export`
`8`	`8`	`checkForGitbook <- function(quiet=FALSE) {`
`9`		`- if(system('npm', ignore.stdout=TRUE) != 0) {`
	`9`	`+ if(system('npm version', ignore.stdout=TRUE) != 0) {`
`10`	`10`	`stop("Cannot find node.js. You can install it from http://nodejs.org/download/")`
`11`	`11`	`}`
`12`	`12`	`if(system('gitbook', ignore.stdout=TRUE) != 0) {`