How can I use environment variables in my .travis.yml file?

How can I use environment variables in my .travis.yml file?

You can define environment variables in your .travis.yml file using the 'env' key. For example:

env:
  global:
    - MY_VAR=value

Can I use encrypted environment variables?

Yes, you can encrypt environment variables using the Travis CLI. Use the command travis encrypt MY_VAR=value to encrypt and add it to your .travis.yml.

What if I want to set different variables for different branches?

You can set branch-specific environment variables using the 'branches' key. For example:

branches:
  only:
    - main
env:
  global:
    - MY_VAR=value_for_main
  matrix:
    - MY_VAR=value_for_other_branch

Are there any limitations on environment variables?

Yes, there are some limitations. For instance, environment variables can only be up to 4KB in size, and you should avoid sensitive data unless encrypted.