add-apt-repository command stops when trying to test in local machine using nektos/act

[kohei-noda-qcrg]

I sometimes use nektos/act to test a program in a local environment and then push it, in order to reduce unnecessary testing of GitHub actions in a private repository.

I used this action to simplify the setup of gfortran, but when doing add-apt-repository I get the following message and have to press the keyboard to proceed.

More info: https://launchpad.net/~ubuntu-toolchain-r/+archive/ubuntu/test
Adding repository.
Press [ENTER] to continue or Ctrl-c to cancel.

Keyboard input during action execution is disabled in nektos/act, so to set up gfortran with this action,
I need to redirect as gh act > out etc.

To solve this problem we need to add the --yes option to the add-apt-repository command.
https://stackoverflow.com/questions/45548826/apt-get-how-to-bypass-pressing-enter#:~:text=This%20message%20stems%20from%20a%20call %20to%20add%2Dapt%2Drepository.