SPIN 2018 / 2019 Exercise

Prerequisites

Make sure you have a version of git and python 2.7 installed and have a github account

Download

First obtain a copy of the current Einstein Toolkit website and tool to transfer trac tickets to github:

mkdir spin_exercise
cd spin_exercise
virtualenv -p python2.7 $PWD
source bin/activate
pip install PyGithub
git clone https://bitbucket.org/einsteintoolkit/www.git website
git clone https://github.com/behrisch/migrate-trac-issues-to-github.git

which downloads a copy of the Einstein Toolkit's website as well as tools to transfer ticktets from trac to github. I have put everything into a python virtualenv to avoid adding extra software outside of the spin_exercise directory.

Exercise

The exercise is to re-create the front-page of the Einstein Toolkit website as a github pages page in a repository of your own on github and to transfer some tickets from trac to github's issue system.

First create a new github repository et_spin2018 in your account,
clone it to your laptop and
copy and commit the files required to render the Einstein Toolkit front page http://www.einsteintoolkit.org into a branch gh-pages.
Push your gh-pages branch to github using
```
git push --set-upstream origin gh-pages
```
modify the foo loop in migrate-trac-issues-to-github/migrate.py in line 276 by adding a break so that only one ticket is processed (instead of all of them)

run the migration script with your new repository as the target

migrate-trac-issues-to-github/migrate.py --trac-url=https://trac.einsteintoolkit.org --github-api-url=https://github.com/api/v3 --github-project=YOURGITHUBUSERNAME/et_spin2018

./simfactory/bin/sim build --mdbkey make 'make -j2'

exe/cactus_sim arrangements/CactusExamples/WaveMoL/par/gaussian.par

Hint

You can access the value of phi as phi[index] and check that your code produces the same results as found in phi_maximum.xg.

If you prefer to use C++ instead of plain C you can rename the file WaveMoL.c to WaveMoL.cc, update the file arrangements/CactusExamples/WaveMoL/src/make.code.defn to list WaveMoL.cc and recompile.

This fragment outputs time:

printf("Current time: %g\n", cctk_time);

Solution

If you get stumped with the exercise, here's a worked out solution. Obviously you cannot send me this one before the interview .

Child pages