Export notarized dmg using make notarize validate dmg command

Makefile

@@ -2,6 +2,7 @@
 xcodebuild?=/usr/bin/xcodebuild
 xcrun?=/usr/bin/xcrun
 
+KEYCHAIN_PROFILE:=notarization-profile
 PRODUCT_NAME:=ImgurBar
 TMP:=$(shell mktemp -dt com.ailinykh.${PRODUCT_NAME})
 
@@ -12,6 +13,7 @@ RESULT_BUNDLE_PATH?=$(TMP)/$(PRODUCT_NAME).xcresult
 EXPORT_PATH?=$(TMP)/$(PRODUCT_NAME).exported
 APP_PATH?=$(EXPORT_PATH)/$(PRODUCT_NAME).app
 ZIP_PATH?=$(TMP)/$(PRODUCT_NAME).zip
+DMG_PATH?=$(TMP)/$(PRODUCT_NAME).dmg
 
 .PHONY: archive
 archive:
@@ -36,14 +38,18 @@ export: archive
         -exportPath $(EXPORT_PATH) \
         -exportOptionsPlist exportOptions.plist
 
-# xcrun notarytool store-credentials --key <KEY.p8> --key-id <KEY_ID> --issuer <KEY_ISSUER> notarization-profile
-# xcrun notarytool log <SUBMISSION_ID> --keychain-profile notarization-profile
+# xcrun notarytool store-credentials --key <KEY.p8> --key-id <KEY_ID> --issuer <KEY_ISSUER> $(KEYCHAIN_PROFILE)
+# xcrun notarytool log <SUBMISSION_ID> --keychain-profile $(KEYCHAIN_PROFILE)
 .PHONY: notarize
 notarize: export
 	/usr/bin/ditto -c -k --keepParent $(APP_PATH) $(ZIP_PATH); \
-    $(xcrun) notarytool submit $(ZIP_PATH) --verbose --wait --keychain-profile notarization-profile; \
+    $(xcrun) notarytool submit $(ZIP_PATH) --verbose --wait --keychain-profile $(KEYCHAIN_PROFILE); \
     $(xcrun) stapler staple $(APP_PATH)
 
 .PHONY: validate
 validate:
-	spctl -av $(APP_PATH)
+	spctl -av $(APP_PATH)
+
+.PHONY: dmg
+dmg: export
+	hdiutil create -fs HFS+ -srcfolder $(APP_PATH) -volname $(PRODUCT_NAME) $(DMG_PATH)