X-Git-Url: https://git.arvados.org/rnaseq-cwl-training.git/blobdiff_plain/ff37db08a1a0a1d913e763b93bcb15bc8bde2687..3d04cbbfb1bfffdffae37cf9df6fe7b7902cfd82:/bin/chunk-options.R

diff --git a/bin/chunk-options.R b/bin/chunk-options.R
index 1890d32..d956f60 100644
--- a/bin/chunk-options.R
+++ b/bin/chunk-options.R
@@ -8,18 +8,32 @@ library("knitr")
 
 fix_fig_path <- function(pth) file.path("..", pth)
 
-## We use the swc-rmd- prefix for the figures generated by the lssons
-## so they can be easily identified and deleted by `make clean`.  The
+
+## We set the path for the figures globally below, so if we want to
+## customize it for individual episodes, we can append a prefix to the
+## global path. For instance, if we call knitr_fig_path("01-") in the
+## first episode of the lesson, it will generate the figures in
+## `fig/rmd-01-`
+knitr_fig_path <- function(prefix) {
+    new_path <- paste0(opts_chunk$get("fig.path"),
+                      prefix)
+    opts_chunk$set(fig.path = new_path)
+}
+
+## We use the rmd- prefix for the figures generated by the lssons so
+## they can be easily identified and deleted by `make clean-rmd`.  The
 ## working directory when the lessons are generated is the root so the
 ## figures need to be saved in fig/, but when the site is generated,
 ## the episodes will be one level down. We fix the path using the
 ## `fig.process` option.
+
 opts_chunk$set(tidy = FALSE, results = "markup", comment = NA,
-               fig.align = "center", fig.path = "fig/swc-rmd-",
+               fig.align = "center", fig.path = "fig/rmd-",
                fig.process = fix_fig_path)
 
 # The hooks below add html tags to the code chunks and their output so that they
 # are properly formatted when the site is built.
+
 hook_in <- function(x, options) {
   stringr::str_c("\n\n~~~\n",
                  paste0(x, collapse="\n"),