Add Github action workflow for MacOS build

.github/workflows/macos.yml

@@ -0,0 +1,62 @@
+name: MacOS
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  build:
+    runs-on: macos-latest
+
+    steps:
+    # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
+    - uses: actions/checkout@v2
+
+    - name: Install build tools
+      run: brew install automake autoconf libtool pkg-config
+
+    - name: Install libinotify-kqueue
+      # brew package does not have unlock-notify
+      run: |
+        git clone https://github.com/libinotify-kqueue/libinotify-kqueue
+        cd libinotify-kqueue
+        autoreconf -fvi
+        ./configure
+        make
+        sudo make install
+        cd ..
+
+    - name: Install sqlite
+      # brew package does not have unlock-notify
+      run: |
+        wget https://www.sqlite.org/2020/sqlite-autoconf-3310100.tar.gz
+        tar xzf sqlite-autoconf-3310100.tar.gz
+        cd sqlite-autoconf-3310100
+        export CFLAGS='-DSQLITE_ENABLE_UNLOCK_NOTIFY=1'
+        ./configure
+        make
+        sudo make install
+        cd ..
+
+    - name: Install ffmpeg
+      # The libbluray ffmpeg dependency fails without the chown (source: stackoverflow)
+      run: |
+        sudo chown -R $(whoami) $(brew --prefix)/*
+        brew install ffmpeg
+
+    - name: Install gperf and antlr3
+      run: |
+        brew install gperf
+        wget https://github.com/ejurgensen/actionstest/blob/master/antlr35_install.sh
+        ./antlr35_install.sh -p /usr/local
+
+    - name: Install other dependencies
+      run: brew install libunistring libmxml confuse libplist sqlite libwebsockets libevent libgcrypt json-c protobuf-c libsodium gnutls pulseaudio
+
+    - name: Configure forked-daapd
+      run: |
+        autoreconf -fi
+        ./configure --enable-chromecast --enable-lastfm --with-pulseaudio
+        echo All done