Travis and Erlang on OSX - takes 21 minutes to build

Questions / Help
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1

Hello,

I have the following travis file:

language: erlang

matrix:

  include:
    - os: linux
      dist: bionic
      otp_release: 23.3.1

    - os: linux
      dist: focal
      otp_release: 24.3.1

    - os: linux
      dist: focal
      otp_release: 25.0

    - os: osx
      osx_image: xcode12.2
      language: generic

before_script:

- if [[ $TRAVIS_OS_NAME == linux ]]; then sudo apt-get -y update || true ; fi
- if [[ $TRAVIS_OS_NAME == osx ]]; then brew install erlang || true; fi

- curl https://s3.amazonaws.com/rebar3/rebar3 --output rebar3 && chmod +x rebar3

script:
    - ./rebar3 compile

Unfortunately on OSX it takes 21 minutes to build, while 20 minutes are spent to install erlang … There is any other way to install a prebuild version on osx or to somehow cache the install ?

2

Do you build it on the disk shared between OSX and the VM? That can be horribly slow. If this is the case, it might help to use a disk which is not shared with the host os.

3

Hello,

I’m not sure what do you mean. I’m only running brew install erlang into before_script section.

4

Does it help if you pass --force-bottle to brew install?

5

Never mind, I thought you where trying to build something on a local vm.

6

I tested on another project : Travis CI - Test and Deploy with Confidence

Seems previous build was around 30 minutes. Now decreased to 17 minutes. Almost the entire time is still spent in installing erlang.

7

After looking to travis console and docs I make the following config that decreased the time to 8 minutes:


    - os: osx
      osx_image: xcode12.2
      language: generic
      env:
        - HOMEBREW_NO_INSTALLED_DEPENDENTS_CHECK=true
        - HOMEBREW_NO_INSTALL_UPGRADE=true
        - HOMEBREW_NO_INSTALL_CLEANUP=true
      cache:
        directories:
          - $HOME/Library/Caches/Homebrew
          - /usr/local/Homebrew

Basically:

  • add section cache
  • add env variables for homebrew to avoid doing unnecessary updates