Added macOS build script

.gitignore

@@ -5,3 +5,4 @@ Builds/MacOSX/receivemidi.xcodeproj/project.xcworkspace/xcuserdata
 /Builds/VisualStudio2017/.vs
 /Builds/VisualStudio2017/x64
 /Builds/VisualStudio2017/receivemidi_ConsoleApp.vcxproj.user
+Installers

Scripts/build-macos.sh

@@ -0,0 +1,45 @@
+#!/bin/bash
+
+if [ $# -eq 0 ]; then
+    echo "The release version is required as an argument"
+    exit 1
+fi
+
+PROJECT_DIR=$PWD
+
+export RELEASE_VERSION="$1"
+export PATH_TO_JUCE="$PROJECT_DIR/JUCE"
+
+SIGN_ID="Developer ID Application: Uwyn, LLC (AGZT8GVS7G)"
+BUILD_DIR="$PWD/Builds/MacOSX/build"
+INSTALLERS_DIR="$PROJECT_DIR/Installers"
+PKG_FILE="receivemidi-macos-${RELEASE_VERSION}.pkg"
+ARCHIVE_FILE="$INSTALLERS_DIR/receivemidi-macOS-${RELEASE_VERSION}.zip"
+
+rm -rfv "$BUILD_DIR"
+mkdir -v "$INSTALLERS_DIR"
+
+# build release artifacts
+echo "Building all ProJucer artifacts"
+xcodebuild -project ./Builds/MacOSX/receivemidi.xcodeproj -config Release SYMROOT=build -scheme "receivemidi - ConsoleApp"
+
+# sign each individual artifact
+echo "Codesigning all artifacts"
+codesign -f -s "$SIGN_ID" "${BUILD_DIR}/Release/receivemidi" --deep --strict --timestamp --options=runtime
+
+# build the installer package in the build directory
+echo "Building installer package"
+pkgbuild --root "${BUILD_DIR}/Release" --identifier com.uwyn.receivemidi --version ${RELEASE_VERSION} --install-location /usr/local/bin --sign "Developer ID Installer: Uwyn, LLC (AGZT8GVS7G)" "${BUILD_DIR}/${PKG_FILE}"
+
+# Notarization
+echo "Notarizating installer"
+xcrun notarytool submit "${BUILD_DIR}/${PKG_FILE}" --keychain-profile "notary-uwyn.com" --wait
+xcrun stapler staple "${BUILD_DIR}/${PKG_FILE}"
+spctl --assess -vv --type install "${PKG_FILE}"
+
+echo "Creating zip archive of installer"
+pushd "${BUILD_DIR}"
+zip -r  "${ARCHIVE_FILE}" "${PKG_FILE}"
+popd
+
+echo "Finished building `realpath $ARCHIVE_FILE`"