Add build to avoid using regexpu-core in runtime

Author: barak007

lib/parse.js

@@ -1,7 +1,7 @@
 "use strict";
 
 var Parser = require("fastparse");
-var regexpu = require("regexpu-core");
+var uniRegexp = require("./uni-regexp");
 
 function unescape(str) {
 	return str.replace(/\\(.)/g, "$1");
@@ -175,8 +175,8 @@ function getSelectors() {
 	// ISO 10646 characters U+00A0 and higher, plus the hyphen (-) and the underscore (_)
 	//
 	// 10ffff is the maximum allowed in current Unicode
-	selectors[regexpu("\\.((?:\\\\.|[A-Za-z_\\-\\u{00a0}-\\u{10ffff}])(?:\\\\.|[A-Za-z_\\-0-9\\u{00a0}-\\u{10ffff}])*)", "u")] = typeMatch("class");
-	selectors[regexpu("#((?:\\\\.|[A-Za-z_\\-\\u{00a0}-\\u{10ffff}])(?:\\\\.|[A-Za-z_\\-0-9\\u{00a0}-\\u{10ffff}])*)", "u")] = typeMatch("id");
+	selectors[uniRegexp.typeMatchClass] = typeMatch("class");
+	selectors[uniRegexp.typeMatchId] = typeMatch("id");
 	var selectorsSecondHalf = {
 		":(not|matches|has|local|global)\\((\\s*)": nestedPseudoClassStartMatch,
 		":((?:\\\\.|[A-Za-z_\\-0-9])+)\\(": pseudoClassStartMatch,

lib/stringify.js

@@ -1,10 +1,7 @@
 "use strict";
 
-var regexpu = require("regexpu-core");
-var identifierEscapeRegexp = new RegExp(
-	regexpu("(^[^A-Za-z_\\-\\u{00a0}-\\u{10ffff}]|^--|[^A-Za-z_0-9\\-\\u{00a0}-\\u{10ffff}])", "ug"),
-	"g"
-);
+var uniRegexp = require("./uni-regexp");
+var identifierEscapeRegexp = new RegExp(uniRegexp.identifierEscapeRegexp, "g");
 
 function escape(str, identifier) {
 	if(str === "*") {

lib/uni-regexp.js

@@ -5,9 +5,10 @@
   "main": "lib/index.js",
   "scripts": {
     "lint": "eslint .",
-    "pretest": "npm run lint",
+    "pretest": "npm run build && npm run lint",
     "test": "mocha",
     "cover": "nyc npm test",
+    "build": "node scripts/build-regexpu.js",
     "report:coveralls": "nyc report --reporter=text-lcov | coveralls",
     "report:codecov": "nyc report --reporter=text-lcov | codecov --pipe",
     "publish-patch": "npm test && npm version patch && git push && git push --tags && npm publish"
@@ -31,15 +32,15 @@
   "homepage": "https://github.com/css-modules/css-selector-tokenizer",
   "dependencies": {
     "cssesc": "^3.0.0",
-    "fastparse": "^1.1.2",
-    "regexpu-core": "^4.6.0"
+    "fastparse": "^1.1.2"
   },
   "devDependencies": {
     "codecov": "^3.6.5",
     "coveralls": "^3.0.9",
     "eslint": "^6.8.0",
     "mocha": "^7.1.0",
-    "nyc": "^15.0.0"
+    "nyc": "^15.0.0",
+    "regexpu-core": "^4.6.0"
   },
   "directories": {
     "test": "test"

package.json

@@ -0,0 +1,26 @@
+var fs = require("fs");
+var path = require("path");
+var regexpu = require("regexpu-core");
+
+var uniReg = {
+  typeMatchClass: regexpu(
+    "\\.((?:\\\\.|[A-Za-z_\\-\\u{00a0}-\\u{10ffff}])(?:\\\\.|[A-Za-z_\\-0-9\\u{00a0}-\\u{10ffff}])*)",
+    "u"
+  ),
+  typeMatchId: regexpu(
+    "#((?:\\\\.|[A-Za-z_\\-\\u{00a0}-\\u{10ffff}])(?:\\\\.|[A-Za-z_\\-0-9\\u{00a0}-\\u{10ffff}])*)",
+    "u"
+  ),
+  identifierEscapeRegexp: regexpu(
+    "(^[^A-Za-z_\\-\\u{00a0}-\\u{10ffff}]|^--|[^A-Za-z_0-9\\-\\u{00a0}-\\u{10ffff}])",
+    "ug"
+  ),
+};
+
+var targetFile = path.join(__dirname, "../lib/uni-regexp.js");
+
+fs.writeFileSync(
+  targetFile,
+  "/* AUTO GENERATED */\nmodule.exports = " + JSON.stringify(uniReg, null, 4)
+);
+console.log('Done building ' + targetFile)