Travis CI Debug Build

• Install travis gem gem install travis for local scholar repo
• Get your private token travis token
• Get the respective build id from the build log under "Build system information".
• Run the following command with your private token and the job id to restart a build in debug mode

    curl -s -X POST \
      -H "Content-Type: application/json" \
      -H "Accept: application/json" \
      -H "Travis-API-Version: 3" \
      -H "Authorization: token ********************" \
      -d "{\"quiet\": true}" \
      https://api.travis-ci.org/job/${id}/debug

• Visit the respective build page on travis-ci.org and follow the log of debug build to find ssh command to connect to debug build via terminal
• Run something similar to ssh <random-string>@ny2.tmate.io from your terminal
• If you get a permission denied error, run ssh-keygen to generate key. If you don't go with the defaults of ssh-keygen, run ssh -i ~/.ssh/<NameYouProvided> <random-string>@to2.tmate.io
• After you connect to the session, you can run the following commands in order

    travis_run_before_install
    travis_run_install
    travis_run_before_script
    travis_run_script --> This triggers "bundle exec rake ci". You can modify code before running this if need be.
    travis_run_after_success
    travis_run_after_failure
    travis_run_after_script

• Each debug build session stays active for about 30 mins +1/2. Start over if need be.

References:

• https://docs.travis-ci.com/user/running-build-in-debug-mode/
• https://github.com/travis-ci/travis.rb
• http://www.recursion.org/2016/12/13/connecting-to-travis-ci-build-container