Running build in debug mode

Another technique to debug build time issues is by running a debug build in Travis CI. You need to email [email protected] to toggle this feature on for public repositories while private repositories have the debug mode enabled by default. The reason for this is that anyone can come across a log containing the SSH access and can then make a connection to the virtual machine and then potentially read out secret environment information, such as client IDs, secrets, and more.

Getting an API token from the profile page

To restart a job in debug mode via the API, you need to send a POST request to the job's debug endpoint. This request needs to be authenticated by adding your Travis CI API token to the authorization header. You can find your API token in your Travis CI Profile page for public projects.

You need to visit a URL, such as https://travis-ci.org/profile/packtci. Then you need to copy your API token in the profile page, which looks like this:

Next, you will...