Use requireNamespace instead of library

hadley · hadley · commit 94fa853264bf · 2015-10-21T10:01:34.000-05:00
diff --git a/R/plot.r b/R/plot.r
@@ -142,7 +142,7 @@ print.ggplot <- function(x, newpage = is.null(vp), vp = NULL, ...) {
   # Record dependency on 'ggplot2' on the display list
   # (AFTER grid.newpage())
   recordGraphics(
-    library("ggplot2", quietly = TRUE),
+    requireNamespace("ggplot2", quietly = TRUE),
     list(),
     getNamespace("ggplot2")
   )

Original file line number	Diff line number	Diff line change
`@@ -142,7 +142,7 @@ print.ggplot <- function(x, newpage = is.null(vp), vp = NULL, ...) {`
`142`	`142`	`# Record dependency on 'ggplot2' on the display list`
`143`	`143`	`# (AFTER grid.newpage())`
`144`	`144`	`recordGraphics(`
`145`		`- library("ggplot2", quietly = TRUE),`
	`145`	`+ requireNamespace("ggplot2", quietly = TRUE),`
`146`	`146`	`list(),`
`147`	`147`	`getNamespace("ggplot2")`
`148`	`148`	`)`