---
title: dirty-haskell.org´s git-based publication system
published: 2016-12-08
tags: Blog Software
---

Initially I set up dirty-haskell.org (which is currently powered by [hakyll])
to [rsync] the results of compiling up onto my server whenever I intone
`dirty-haskell deploy`{.sh}.

In my ever continuing quest to have my life consist mostly of an array of git
repositories however this didn't seem satisfactory.
Therefore I configured my [gitolite] instance to automatically compile und
publish the current git version whenever I push to `master`.

Gitolite provides us with facilities to install [githooks]. Publishing will be
handled by `post-update`:

~~~{.sh}
#!/usr/bin/env zsh

touchedMaster=false

for ref ($@); do
    [[ ${ref} =~ .*/master$ ]] || continue

    touchedMaster=true
    break
done

$touchedMaster || exit 0

{
    tmpDir=$(mktemp -d)
    delTmpDir() {
        cd /
        rm -rf ${tmpDir}
    }
    
    trap delTmpDir EXIT

    git clone --branch master --depth 1 --single-branch file://$(pwd) ${tmpDir}

    cd ${tmpDir}
    umask 0022
    nix-shell --run "dirty-haskell build && dirty-haskell deploy"
} 2>&1 | stdbuf -o 0 tr '\r' '\n' | logger --id=$$ -p daemon.info -t dirty-haskell
~~~

The script checks if the master branch was moved to a new commit or otherwise
touched and, if so, clones a copy of the repo to a temporary directory and runs
hakyll´s deploy command in it, which is set to rsync the compiled version to a
folder where it´ll be picked up by nginx.

## Update ##

It works.

[hakyll]: https://jaspervdj.be/hakyll/
[rsync]: https://git.samba.org/rsync.git
[gitolite]: http://gitolite.com
[githooks]: http://githooks.com