Dilawar Singh Being Dilawar/ Tools/

I use Jekyll to build this site. Recently, I switched to Manjaro that comes with ruby-3.0 by default, I could install Jekyll successfully using pacman but could not run it.

$ jekyll --help
/usr/lib/ruby/3.0.0/rubygems.rb:281:in `find_spec_for_exe': can't find gem jekyll (>= 0.a) with executable jekyll (Gem::GemNotFoundException)
	from /usr/lib/ruby/3.0.0/rubygems.rb:300:in `activate_bin_path'
	from /usr/bin/jekyll:23:in `<main>'

Honestly, I don’t like to fight with installation process. And I know very little about ruby. So I turned to docker which I know little.

TLDR: Here is my Makefile. I run make in the Github repository to build and test this site.

JEKYLL_VERSION := 3.8

JEKYLL := docker run --rm \
	--volume="$(PWD):/srv/jekyll" \
	--volume="$(PWD)/vendor/bundle:/usr/local/bundle" \
	-p 4000:4000 \
	-it jekyll/jekyll:$(JEKYLL_VERSION) jekyll

all :
	$(JEKYLL) serve

The core command is the following. Note the small tweak since bash and make has different syntax for expanding variable: $(FOO) in Makefile is equivalent to $FOO or ${FOO} in bash.

$ docker run --rm \
	--volume="$PWD:/srv/jekyll" \
	--volume="$PWD/vendor/bundle:/usr/local/bundle" \
	-p 4000:4000 \
	-it jekyll/jekyll:3.8 jekyll serve

Option -p 4000:4000 exposes port 4000 of docker container to localhost. Without this option, http://localhost:4000 in your browser will not show any content. Option --volume="$(PWD)/vendor/bundle:/usr/local/bundle" to make sure that gems installed during the run process are not lost.