Add warning when trying to download source code files

Author: Alexander01998

_includes/update/downloads.html

@@ -184,6 +184,11 @@ <h3>for Minecraft Snapshots</h3>
 function openDataHref(event, dataHref) {
 	if(event.type === 'auxclick' && event.button !== 1)
 		return;
+	const warning = event.currentTarget.getAttribute('data-warning');
+	if(warning && !window.confirm(warning)) {
+		event.preventDefault();
+		return;
+	}
 	window.open(dataHref, '_blank');
 }
 </script>

_includes/update/fabric-download.html

@@ -111,6 +111,7 @@
 		{%- assign srcfile = srclink | split: '/' | last -%}
 		<a href="javascript:void(0)"
 			data-href="{{ srclink }}"
+			data-warning="This link downloads Wurst's source code, not the mod itself.&#10;&#10;If you want to install Wurst, click the big download button above instead. Putting this -sources.jar file into your mods folder will crash the game.&#10;&#10;Download the source code anyway?"
 			data-analytics="Download Wurst"
 			data-analytics-version="{{ page.wurst-version }}"
 			data-analytics-mcversion="{{ mcversion }}"