View source for Build on Github Pull Request

It is convenient to have a test build executed when a pull request is submitted to the sim-recon repository on GitHub, to make sure that the software still compiles correctly with the proposed changes.  This is done using the [https://developer.github.com/webhooks/ webhooks] feature of github, which allows for the triggering of external programs when certain actions are performed on the GitHub repository.

# Create webhook
#* Go to repository: Settings -> Webhooks & Services -> Add webhook
#* Set URL to location of script on halldweb
#* Request JSON data
#* Only trigger on pull requests
# Set up script on halldweb
#* Install python modules: web.py, flup, requests
#* Have simple wrapper script: basic idea is that it gets called every time there is a pull request.   Only build on open or reopen of pull request.  Extract the branch belonging to the pull request and build it
#** example on how to check out a particular branch: "git clone https://github.com/sdobbs/sim-recon.git --branch test2 --single-branch" clones branch "test2" to directory "sim-recon"
#** sanity checks for input?
#** Need shell script that does the build and access to the build logs
#*** possible sanity check:  parse output of "git branch" and make sure that the requested branch is legitimate
# Report results
#* Look at build logs - extract errors
#* Report errors or lack thereof via comment on pull request
#** Need to store github credentials - personal access token? store in local .config file that can't be seen from the web? whose account?