# Controls
.PHONY : commands clean files
+.NOTPARALLEL:
all : commands
## commands : show all commands.
@grep -h -E '^##' ${MAKEFILES} | sed -e 's/## //g'
## serve : run a local server.
-serve : lesson-rmd
+serve : lesson-md
${JEKYLL} serve
## site : build files but do not run a server.
-site : lesson-rmd
+site : lesson-md
${JEKYLL} build
# repo-check : check repository settings.
## ----------------------------------------
## Commands specific to lesson websites.
-.PHONY : lesson-check lesson-rmd lesson-files lesson-fixme
+.PHONY : lesson-check lesson-md lesson-files lesson-fixme
# RMarkdown files
RMD_SRC = $(wildcard _episodes_rmd/??-*.Rmd)
$(patsubst _extras/%.md,${DST}/%/index.html,$(wildcard _extras/*.md)) \
${DST}/license/index.html
-## lesson-rmd : convert Rmarkdown files to markdown
-lesson-rmd: $(RMD_SRC)
- @bin/knit_lessons.sh $(RMD_SRC)
+## lesson-md : convert Rmarkdown files to markdown
+lesson-md : ${RMD_DST}
+
+# Use of .NOTPARALLEL makes rule execute only once
+${RMD_DST} : ${RMD_SRC}
+ @bin/knit_lessons.sh ${RMD_SRC}
## lesson-check : validate lesson Markdown.
lesson-check :