Add support for loading preact from local repo

package.json

@@ -30,6 +30,8 @@
 		"test": "mochette -c tsconfig.cjs.json 'src/**/*.test.{ts,tsx}'",
 		"test:e2e": "node tools/fetch-preact-versions.mjs && playwright test",
 		"test:e2e:10": "PREACT_VERSION=10 npm run test:e2e",
+		"test:e2e:11": "PREACT_VERSION=11 npm run test:e2e",
+		"test:e2e:git": "PREACT_VERSION=git npm run test:e2e",
 		"test:e2e:all": "npm run test:e2e && npm run test:e2e:10",
 		"dev": "npm run dev:serve",
 		"dev:serve": "vite test-e2e/fixtures --port 8100",

test-e2e/fixtures/load-preact-version.ts

@@ -29,10 +29,34 @@ export function loadPreactVersion(): Plugin {
 			if (match) {
 				const version = match[1].replace(/_/g, ".");
 
-				const versionDir = path.join(cacheDir, version);
 				if (cache.has(id)) {
 					return cache.get(id);
+				} else if (version === "git") {
+					const versionDir = path.join(process.cwd(), "..", "preact");
+					const pkg = JSON.parse(
+						fs.readFileSync(path.join(versionDir, "package.json"), "utf-8"),
+					);
+					const modName = id
+						.replace("@git", "")
+						.replace(/^preact$/, ".")
+						.replace(/^preact\//, "./");
+					const entry = pkg.exports[modName].module;
+
+					const code = fs.readFileSync(path.join(versionDir, entry), "utf-8");
+					const map = fs.readFileSync(
+						path.join(versionDir, entry + ".map"),
+						"utf-8",
+					);
+
+					return {
+						code: code.replace(
+							/["']preact/g,
+							`"preact@${version.replace(/\./g, "_")}`,
+						),
+						map,
+					};
 				} else {
+					const versionDir = path.join(cacheDir, version);
 					// Check if someone is already resolving
 					const inProgress = pending.get(version);
 					if (inProgress) {

test-e2e/fixtures/utils.ts

@@ -6,7 +6,7 @@ import fs from "fs";
  */
 export function getPreactVersions() {
 	const dir = path.join(__dirname, "vendor", "preact");
-	return fs
+	const versions = fs
 		.readdirSync(dir)
 		.filter(name => !name.startsWith("."))
 		.map(name => {
@@ -50,4 +50,6 @@ export function getPreactVersions() {
 			// Check if is tagged release: 11.0.0-experimental.0
 			return a.localeCompare(b) * -1;
 		});
+
+	return ["git", ...versions];
 }