Share precommit hook

{% include JB/setup %}

Today I want to share a code snippet. It used for reminding me run rake preview before git commit. <!--more-->

TL;DR. Because I use jeklly to generate my blog static pages, jeklly is a generator of static blog. I can write a markdown file (just like this one) and run rake preview, jeklly could help me generate the html files from markdown. So I must remeber run this command before commit changes. But I often review my articles and found some mistakes in them, I make a tiny hotfix and commit quickly. In this case, I forgot to re-generate pages. So I made a hook before git commit which runs this command automatically and detects some changes occur. The hook will failed when I forget run the command.

Here it is:

./_gen_wiki.sh  # My blog contains a wiki, so it need be generated.
jekyll build
git diff --quiet --exit-code _site/  # Detect uncached changes.
ret=$?
exec 1>&2
RED='\033[0;31m'
NC='\033[0m' # No Color
[[ x$ret != "x0" ]] && echo "${RED}Some files still not be stage in directory _site${NC}"
exit $ret