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$set(tidy = FALSE, results = "markup", comment = NA,
- fig.align = "center", fig.path = "fig/swc-rmd-",
+ fig.align = "center", fig.path = "fig/rmd-",
fig.process = fix_fig_path)
# The hooks below add html tags to the code chunks and their output so that they
# are properly formatted when the site is built.
+
hook_in <- function(x, options) {
stringr::str_c("\n\n~~~\n",
paste0(x, collapse="\n"),
}
hook_out <- function(x, options) {
+ x <- gsub("\n$", "", x)
stringr::str_c("\n\n~~~\n",
paste0(x, collapse="\n"),
"\n~~~\n{: .output}\n\n")
}
hook_error <- function(x, options) {
+ x <- gsub("\n$", "", x)
stringr::str_c("\n\n~~~\n",
paste0(x, collapse="\n"),
"\n~~~\n{: .error}\n\n")