Fix crash on named pattern checking

changelog.md

@@ -1,5 +1,9 @@
 # Changelog
 
+## 1.4.2
+*2021-08-01*
+- Fixed crash occurring when checking named patterns.
+
 ## 1.4.1
 *2021-08-01*
 - Added `all` key to `languages` which collates all language data into one object.

package.json

@@ -1,6 +1,6 @@
 {
 	"name": "linguist-js",
-	"version": "1.4.1",
+	"version": "1.4.2",
 	"description": "Analyse languages used in a folder. Powered by GitHub Linguist, although it doesn't need to be installed.",
 	"main": "dist/index.js",
 	"bin": {

readme.md

@@ -81,19 +81,19 @@ let { count, results, languages } = linguist(folder, options);
     Analyse multiple folders using the syntax `"{folder1,folder2,...}"`.
   - `opts` (optional; object):
     An object containing analyser options.
-  - `ignore` (string array):
-    A list of file path globs to explicitly ignore.
-  - `keepVendored` (boolean):
-    Whether to keep vendored files (dependencies, etc) (defaults to `false`).
-  - `quick` (boolean):
-    Whether to skip the checking of `.gitattributes` and `.gitignore` files for manual language classifications (defaults to `false`).
-    Alias for `checkAttributes: false, checkIgnored: false`.
-  - `checkAttributes` (boolean):
-    Force the checking of `.gitattributes` files (defaults to `true` unless `quick` is set).
-  - `checkIgnored` (boolean):
-    Force the checking of `.gitignore` files (defaults to `true` unless `quick` is set).
-  - `checkHeuristics` (boolean):
-    Apply heuristics to ambiguous languages (defaults to `true` unless `quick` is set).
+    - `ignore` (string array):
+      A list of file path globs to explicitly ignore.
+    - `quick` (boolean):
+      Whether to skip the checking of `.gitattributes` and `.gitignore` files for manual language classifications (defaults to `false`).
+      Alias for `checkAttributes: false, checkIgnored: false`.
+    - `keepVendored` (boolean):
+      Whether to keep vendored files (dependencies, etc) (defaults to `false`).
+    - `checkAttributes` (boolean):
+      Force the checking of `.gitattributes` files (defaults to `true` unless `quick` is set).
+    - `checkIgnored` (boolean):
+      Force the checking of `.gitignore` files (defaults to `true` unless `quick` is set).
+    - `checkHeuristics` (boolean):
+      Apply heuristics to ambiguous languages (defaults to `true` unless `quick` is set).
 
 ### Command-line
 

src/index.ts

@@ -158,7 +158,7 @@ export = async function analyse(root = '.', opts: T.Options = {}) {
 					const patterns: string[] = [];
 					const normalise = (contents: string | string[]) => patterns.push(...(Array.isArray(contents) ? contents : [contents]));
 					if (heuristic.pattern) normalise(heuristic.pattern);
-					if (heuristic.named_pattern) normalise(heuristicsData.namedPatterns[heuristic.named_pattern]);
+					if (heuristic.named_pattern) normalise(heuristicsData.named_patterns[heuristic.named_pattern]);
 					// Check file contents and apply heuristic patterns
 					const fileContent = fs.readFileSync(file, { encoding: 'utf8' });
 					if (patterns.some(pattern => RegExp(pattern).test(fileContent))) {

src/schema.ts

@@ -32,7 +32,7 @@ export interface HeuristicsSchema {
 			and?: HeuristicsRules[]
 		}>
 	}>
-	namedPatterns: Record<string, string | string[]>
+	named_patterns: Record<string, string | string[]>
 }
 
 export type VendorSchema = string[]