actually remove R.cache in the right place.

Author: lorenzwalthert

.travis.yml

@@ -3,7 +3,7 @@
 # Usually you shouldn't need to change the first part of the file
 
 # DO NOT CHANGE THE CODE BELOW
-before_install: R -q -e 'install.packages(c("remotes", "curl", "knitr", "rmarkdown")); remotes::install_github("ropenscilabs/tic"); tic::prepare_all_stages(); remotes::install_deps(dependencies = TRUE); if (isTRUE(as.logical(toupper(Sys.getenv("R_REMOVE_RCACHE"))))) remove.packages("R.cache"); tic::before_install()'
+before_install: R -q -e 'install.packages(c("remotes", "curl", "knitr", "rmarkdown")); remotes::install_github("ropenscilabs/tic"); tic::prepare_all_stages(); remotes::install_deps(dependencies = TRUE); tic::before_install()'
 install: R -q -e 'tic::install()'
 after_install: R -q -e 'tic::after_install()'
 before_script: R -q -e 'tic::before_script()'

tic.R

@@ -1,3 +1,11 @@
+get_stage("after_install") %>%
+  add_code_step(
+    {
+      if (isTRUE(as.logical(toupper(Sys.getenv("R_REMOVE_RCACHE"))))) {
+        remove.packages("R.cache")
+      }
+    }
+  )
 do_package_checks(error_on = ifelse(getRversion() >= "3.2", "note", "error"))
 
 if (Sys.getenv("id_rsa") != "" && ci()$get_branch() == "master" && Sys.getenv("BUILD_PKGDOWN") != "") {