Use 'brew bundle' to install macOS dependencies in CI (#9609)

.circleci/config.yml

@@ -93,7 +93,7 @@ jobs:
             - brew-cache-v1
       - checkout
       - run: bin/ci prepare_system
-      - run: echo 'export PKG_CONFIG_PATH="$PKG_CONFIG_PATH:/usr/local/opt/openssl/lib/pkgconfig"' >> $BASH_ENV
+      - run: echo 'export PKG_CONFIG_PATH="$PKG_CONFIG_PATH:/usr/local/opt/openssl@1.1/lib/pkgconfig"' >> $BASH_ENV
       - run: echo 'export CURRENT_TAG="$CIRCLE_TAG"' >> $BASH_ENV
       - run: bin/ci prepare_build
       - run: bin/ci build

.github/workflows/macos.yml

@@ -5,7 +5,7 @@ on: [push, pull_request]
 env:
   TRAVIS_OS_NAME: osx
   LLVM_CONFIG: /usr/local/opt/llvm/bin/llvm-config
-  PKG_CONFIG_PATH: /usr/local/opt/openssl/lib/pkgconfig
+  PKG_CONFIG_PATH: /usr/local/opt/openssl@1.1/lib/pkgconfig
   SPEC_SPLIT_DOTS: 160
 
 jobs:

Brewfile

@@ -0,0 +1,6 @@
+brew "gmp"
+brew "libevent"
+brew "pcre"
+brew "pkg-config"
+brew "openssl@1.1"
+brew "llvm@10", link: true, conflicts_with: ["python@2"]

bin/ci

@@ -77,8 +77,6 @@ on_github() {
 prepare_system() {
   on_linux 'echo '"'"'{"ipv6":true, "fixed-cidr-v6":"2001:db8:1::/64"}'"'"' | sudo tee /etc/docker/daemon.json'
   on_linux sudo service docker restart
-
-  on_osx brew update
 }
 
 build() {
@@ -119,11 +117,8 @@ prepare_build() {
 
   on_osx curl -L https://github.com/crystal-lang/crystal/releases/download/0.35.1/crystal-0.35.1-1-darwin-x86_64.tar.gz -o ~/crystal.tar.gz
   on_osx 'pushd ~;gunzip -c ~/crystal.tar.gz | tar xopf -;mv crystal-0.35.1-1 crystal;popd'
+  on_osx brew bundle --no-lock
 
-  on_osx 'brew unlink python@2 || true'
-  on_osx brew install z3 llvm@10 gmp libevent pcre pkg-config
-  on_osx brew reinstall openssl
-  on_osx brew link --force llvm@10
   # Note: brew link --force might show:
   #   Warning: Refusing to link macOS-provided software: llvm
   #