mac_ci_setup.sh

#!/bin/bash

# Installs the dependencies required for a macOS build via homebrew.
# Tools are not upgraded to new versions.
# See:
# https://github.com/actions/virtual-environments/blob/master/images/macos/macos-10.15-Readme.md for
# a list of pre-installed tools in the macOS image.

export HOMEBREW_NO_AUTO_UPDATE=1

function is_installed {
    brew ls --versions "$1" >/dev/null
}

function install {
    echo "Installing $1"
    if ! brew install "$1"; then
        echo "Failed to install $1"
        exit 1
    fi
}

if ! brew update; then
    echo "Failed to update homebrew"
    exit 1
fi

DEPS="automake cmake coreutils go libtool wget ninja"
for DEP in ${DEPS}
do
    is_installed "${DEP}" || install "${DEP}"
done

if [ -n "$CIRCLECI" ]; then
    # bazel uses jgit internally and the default circle-ci .gitconfig says to
    # convert https://github.com to ssh://git@github.com, which jgit does not support.
    mv ~/.gitconfig ~/.gitconfig_save
fi

# Required as bazel and a foreign bazelisk are installed in the latest macos vm image, we have
# to unlink/overwrite them to install bazelisk
echo "Installing bazelbuild/tap/bazelisk"
brew tap bazelbuild/tap
brew reinstall --force bazelbuild/tap/bazelisk
if ! brew link --overwrite bazelbuild/tap/bazelisk; then
    echo "Failed to install and link bazelbuild/tap/bazelisk"
    exit 1
fi