Run Travis build locally

travis-local.md

travis-local.md

Preconditions:

1. POSIX or Windows system
2. Install Docker
3. A GitHub repo that already builds on Travis

Postcondition:

• Identical output as if run from Travis

Project status:

• Alpha quality, please post notes here and fork baby fork, I will try to test and accept changes here

Notes:

• Inspiration and original discussion: https://stackoverflow.com/a/24936720/300224
• This code stolen shamelessly from https://medium.com/google-developers/how-to-run-travisci-locally-on-docker-822fc6b2db2e because Medium isn't Gist

1. Install Travis on Docker

   # choose the image according to the language chosen in .travis.yml
   $ docker run -it -u travis quay.io/travisci/travis-jvm /bin/bash
   
   # now that you are in the docker image, switch to the travis user
   sudo su travis
   
   # Install a recent ruby 
   rvm install 2.6.1
   rvm use 2.6.1
   
   # Install travis-build to generate a .sh out of .travis.yml
   cd builds \
   git clone https://github.com/travis-ci/travis-build
   cd travis-build
   mkdir -p ~/.travis
   ln -s $PWD ~/.travis/travis-build
   gem sources -a http://rubygems.org
   gem install bundler
   bundle install --gemfile ~/.travis/travis-build/Gemfile
   bundler binstubs travis
   
   # Create ssh key for Github
   ssh-keygen -t rsa -b 4096 -C “YOUR EMAIL REGISTERED IN GITHUB”
   
   # Click enter to use default location for key
   # You can choose empty passphrase by clicking enter twice
   # Now that we have the key, let’s share with Github
   less ~/.ssh/id_rsa.pub
   
   # Copy the contents of the id_rsa.pub

2. Go to your Github SSH key settings

3. Create a new ssh key with title: “docker key”: “PASTE THE KEY CONTENTS HERE”

4. Go back to docker terminal

   # Create project dir, assuming your project is `AUTHOR/PROJECT` on GitHub
   cd ~/builds \
   mkdir AUTHOR \
   cd AUTHOR \
   git clone git@github.com:AUTHOR/PROJECT.git \
   cd PROJECT
   
   # change to the branch or commit you want to investigate
   # compile travis script into bash script
   travis compile > ci.sh
   
   # Go to bash script and fix the branch name
   vi ci.sh
   
   # in Vi type “/branch” to search and add the right branch name
   # — branch\=\’\NEW_BRANCH’\
   # You most likely will need to edit ci.sh as it ignores ‘matrix’ and ‘env’ keywords
   bash ci.sh