Revert "Disable mac build"

This reverts commit d131c66f02.

.github/workflows/all.yml

@@ -84,6 +84,7 @@ jobs:
       - build_fedora_31
       - build_fedora_32
       - build_focal_64
+      - build_mac
       - build_mingw
       - build_source
       - build_stretch_64
@@ -790,3 +791,63 @@ jobs:
         with:
           name: release_focal_64
           path: bin/clementine_*.deb
+
+  build_mac:
+    name: Build Mac DMG
+    runs-on: macos-10.15
+    steps:
+      - name: Install dependencies
+        run: >
+          brew install
+          boost
+          chromaprint
+          cmake
+          cryptopp
+          fftw
+          glew
+          glib
+          google-sparsehash
+          gst-libav
+          gst-plugins-bad
+          gst-plugins-base
+          gst-plugins-good
+          gst-plugins-ugly
+          gstreamer
+          pkgconfig
+          protobuf
+          protobuf-c
+          qt
+      - name: Install liblastfm
+        run: brew install https://raw.githubusercontent.com/tomahawk-player/homebrew-tomahawkqt5/master/liblastfm.rb
+      - name: Fix liblastfm includes
+        run: ln -s /usr/local/include/lastfm /usr/local/include/lastfm5
+      - uses: actions/checkout@v1.2.0
+      - name: cmake
+        env:
+          PKG_CONFIG_PATH: /usr/local/lib/pkgconfig
+          Qt5_DIR: /usr/local/opt/qt5/lib/cmake/Qt5
+          Qt5LinguistTools_DIR: /usr/local/opt/qt5/lib/cmake/Qt5LinguistTools
+          GST_SCANNER_PATH: /usr/local/opt/gstreamer/libexec/gstreamer-1.0/gst-plugin-scanner
+          GST_PLUGIN_PATH: /usr/local/lib/gstreamer-1.0
+        working-directory: bin
+        run: >
+          cmake ..
+          -Wno-dev
+          -DCMAKE_BUILD_TYPE=Release
+          -DCMAKE_OSX_ARCHITECTURES=x86_64
+          -DGETTEXT_MSGMERGE_EXECUTABLE=/usr/local/opt/gettext/bin/msgmerge
+          -DGETTEXT_MSGFMT_EXECUTABLE=/usr/local/opt/gettext/bin/msgfmt
+          -DGETTEXT_XGETTEXT_EXECUTABLE=/usr/local/opt/gettext/bin/xgettext
+      - name: make
+        working-directory: bin
+        run: make -j2
+      - name: Copy icon files and resources
+        working-directory: bin
+        run: make install
+      - name: Build DMG
+        working-directory: bin
+        run: make dmg
+      - uses: actions/upload-artifact@v2
+        with:
+          name: release_mac
+          path: bin/clementine-*.dmg