Fix multi-delimiter extensions not taking priority

Extensions like `.antlers.php` were being parsed with equal weight to a basic `.php` extension.

Author: Nixinova

changelog.md

@@ -1,5 +1,8 @@
 # Changelog
 
+## Next
+- Fixed file extensions with multiple delimiters not being prioritised over basic extensions.
+
 ## 2.5.1
 *2022-06-26*
 - Fixed heuristics not being applied to files.

src/index.ts

@@ -215,21 +215,31 @@ async function analyse(input?: string | string[], opts: T.Options = {}): Promise
 		}
 		// Search each language
 		let skipExts = false;
+		// Check if filename is a match
 		for (const lang in langData) {
-			// Check if filename is a match
 			const matchesName = langData[lang].filenames?.some(name => paths.basename(file.toLowerCase()) === name.toLowerCase());
 			if (matchesName) {
 				addResult(file, lang);
 				skipExts = true;
 			}
 		}
+		// Check if extension is a match
+		const possibleExts: { ext: string, lang: T.Language }[] = [];
 		if (!skipExts) for (const lang in langData) {
-			// Check if extension is a match
-			const matchesExt = langData[lang].extensions?.some(ext => file.toLowerCase().endsWith(ext.toLowerCase()));
-			if (matchesExt) {
-				addResult(file, lang);
+			const extMatches = langData[lang].extensions?.filter(ext => file.toLowerCase().endsWith(ext.toLowerCase()));
+			if (extMatches?.length) {
+				for (const ext of extMatches)
+					possibleExts.push({ ext, lang });
 			}
 		}
+		// Apply more specific extension if available
+		const isComplexExt = (ext: string) => /\..+\./.test(ext);
+		const hasComplexExt = possibleExts.some(data => isComplexExt(data.ext));
+		for (const { ext, lang } of possibleExts) {
+			if (hasComplexExt && !isComplexExt(ext)) continue;
+			if (!hasComplexExt && isComplexExt(ext)) continue;
+			addResult(file, lang);
+		}
 		// Fallback to null if no language matches
 		if (!fileAssociations[file]) {
 			addResult(file, null);

test/unit.js

@@ -40,6 +40,9 @@ async function unitTest() {
 	await test(['Dockerfile'], ['files', 'Dockerfile']);
 	await test(['CMakeLists.txt'], ['files', 'CMake']);
 	await test(['tsconfig.json'], ['files', 'JSON with Comments']);
+	await test(['index.tsx'], ['files', 'TSX'])
+	await test(['file.antlers.php'], ['files', 'Antlers'])
+	await test(['file.other.php', '<?php?>'], ['files', 'PHP'])
 	desc('shebangs');
 	await test(['node_js', '#!/usr/bin/env node'], ['files', 'JavaScript']);
 	await test(['rake_ruby', '#!/usr/bin/env rake'], ['files', 'Ruby']);