feat: replace parse-literals with a local implementation

Signed-off-by: Henry <mail@henrygressmann.de>

Author: explodingcamera

bun.lock

@@ -1,5 +1,11 @@
 # minify-literals
 
+## 2.0.1
+
+### Patch Changes
+
+- Replace `parse-literals` with a local implementation
+
 ## 2.0.0
 
 ### Major Changes
@@ -75,7 +81,7 @@
 
 - [`2ed7279`](https://github.com/explodingcamera/esm/commit/2ed72792bf13fa4b712fb477208ebb7d061a1e8f) - update dependencies
 
-- [`de8e91f`](https://github.com/explodingcamera/esm/commit/de8e91f4f1052fbd6bf4f82b3c8010195b98a7b1) - update depdendencies
+- [`de8e91f`](https://github.com/explodingcamera/esm/commit/de8e91f4f1052fbd6bf4f82b3c8010195b98a7b1) - update dependencies
 
 ## 1.0.0
 

packages/minify-literals/CHANGELOG.md

@@ -27,9 +27,9 @@ $ pnpm add minify-literals
 import { minifyHTMLLiterals } from "minify-literals";
 
 const source = `
-		const el = html\`<div > <h1>  Hello World  </h1 > </div>\`;
-		const css = css\` .foo { color: red; }  \`;
-	`;
+  const el = html\`<div > <h1>  Hello World  </h1 > </div>\`;
+  const css = css\` .foo { color: red; }  \`;
+`;
 
 let { code, map } = await minifyHTMLLiterals(source);
 // or with options: await minifyHTMLLiterals(source, { fileName: "test.js" });

packages/minify-literals/README.md

@@ -1,5 +1,4 @@
 import MagicString from "magic-string";
-import { type Template, parseLiterals } from "parse-literals";
 import {
 	combineTemplateParts,
 	type CSSOptions,
@@ -10,6 +9,7 @@ import {
 	minifyHTML,
 	splitByPlaceholder,
 } from "./minify.js";
+import { type Template, parseTemplates } from "./literals.js";
 
 type MaybePromise<T> = T | Promise<T>;
 
@@ -28,7 +28,7 @@ export type CSSMinifier = (css: string) => MaybePromise<string>;
 /** Options for {@link minifyHTMLLiterals}. */
 export type Options = {
 	/**
-	 * Source filename used by `parse-literals` and source map generation.
+	 * Source filename used by literal parsing and source map generation.
 	 */
 	fileName?: string;
 
@@ -111,7 +111,7 @@ export async function minifyHTMLLiterals(source: string, options: Options = {}):
 	const cssOptions = options.css ?? defaultMinifyCSSOptions;
 	const htmlTags = options.htmlTags ?? defaultHTMLTags;
 	const cssTags = options.cssTags ?? defaultCSSTags;
-	const templates = parseLiterals(source, { fileName: options.fileName });
+	const templates = parseTemplates(source, options.fileName);
 	const ms = new MagicString(source);
 	const skipCSS = cssOptions !== false && source.includes("unsafeCSS");
 	const skipHTML = htmlMinifier !== false && source.includes("unsafeHTML");

packages/minify-literals/lib/index.ts

@@ -0,0 +1,57 @@
+import { Parser, type Expression, type Node, type TemplateLiteral } from "acorn";
+import { tsPlugin } from "@sveltejs/acorn-typescript";
+
+export type Template = {
+	tag: string;
+	parts: TemplatePart[];
+};
+
+export type TemplatePart = {
+	text: string;
+	start: number;
+	end: number;
+};
+
+export function parseTemplates(source: string, fileName = ""): Template[] {
+	let ast: Node;
+	try {
+		ast = Parser.extend(tsPlugin({ jsx: /\.m?[jt]sx($|[?#])/.test(fileName) })).parse(source, {
+			ecmaVersion: "latest",
+			locations: true,
+			sourceType: "module",
+		});
+	} catch {
+		return [];
+	}
+
+	const templates: Template[] = [];
+	const nodes = [ast];
+
+	for (const node of nodes) {
+		if (node.type === "TaggedTemplateExpression") {
+			const { tag, quasi } = node as Node & { tag: Expression; quasi: TemplateLiteral };
+			templates.push({
+				tag: source.slice(tag.start, tag.end),
+				parts: quasi.quasis.map((quasi) => ({
+					text: quasi.value.raw,
+					start: quasi.start,
+					end: quasi.end,
+				})),
+			});
+		}
+
+		for (const value of Object.values(node)) {
+			if (Array.isArray(value)) {
+				for (const item of value) {
+					if (item && typeof item === "object" && typeof (item as Node).type === "string") {
+						nodes.push(item as Node);
+					}
+				}
+			} else if (value && typeof value === "object" && typeof (value as Node).type === "string") {
+				nodes.push(value as Node);
+			}
+		}
+	}
+
+	return templates;
+}

packages/minify-literals/lib/literals.ts

@@ -1,11 +1,11 @@
 import { describe, expect, it } from "bun:test";
-import type { TemplatePart } from "parse-literals";
 import {
 	combineTemplateParts,
 	defaultMinifyOptions,
 	getPlaceholder,
 	minifyHTML,
 	splitByPlaceholder,
+	type TemplatePart,
 } from "./minify";
 
 describe("minify helpers", () => {

packages/minify-literals/lib/minify.test.ts

@@ -1,6 +1,8 @@
 import { transform, type TransformOptions } from "lightningcss";
 import { type MinifierOptions as HTMLOptions, minify as minifyHTMLString } from "html-minifier-next";
-import type { TemplatePart } from "parse-literals";
+import type { TemplatePart } from "./literals.js";
+
+export type { TemplatePart } from "./literals.js";
 
 export type CSSOptions = Omit<TransformOptions<any>, "filename" | "code">;
 

packages/minify-literals/lib/minify.ts

@@ -1,6 +1,6 @@
 {
 	"name": "minify-literals",
-	"version": "2.0.0",
+	"version": "2.0.1",
 	"description": "Minify CSS and HTML literals",
 	"keywords": [
 		"literals",
@@ -32,10 +32,11 @@
 		"entry": "lib/index.ts"
 	},
 	"dependencies": {
+		"@sveltejs/acorn-typescript": "^1.0.10",
+		"acorn": "^8.16.0",
 		"html-minifier-next": "^6.2.8",
 		"lightningcss": "^1.32.0",
-		"magic-string": "^0.30.21",
-		"parse-literals": "^1.2.1"
+		"magic-string": "^0.30.21"
 	},
 	"engines": {
 		"node": ">=22.0.0"