feat: codegen script

Author: stigi

package.json

@@ -4,7 +4,8 @@
   "private": true,
   "type": "module",
   "scripts": {
-    "changeset": "./scripts/changeset-wrapper.sh"
+    "changeset": "./scripts/changeset-wrapper.sh",
+    "codegen": "tsx scripts/liblab-gen.ts"
   },
   "devDependencies": {
     "@changesets/changelog-github": "^0.5.0",

scripts/liblab-gen.ts

@@ -0,0 +1,76 @@
+import { exec, execSync } from "node:child_process";
+import * as fs from "node:fs/promises";
+import * as path from "node:path";
+
+import { replaceInFile } from "replace-in-file";
+
+async function move(oldPath: string, newPath: string) {
+  await fs.rm(newPath, { recursive: true, force: true });
+  await fs.mkdir(path.dirname(newPath), { recursive: true });
+  await fs.rename(oldPath, newPath);
+}
+
+async function readJSON(path: string) {
+  return fs
+    .readFile(path, { encoding: "utf-8" })
+    .then((data) => JSON.parse(data));
+}
+
+function hasChangesInPath(path: string) {
+  try {
+    execSync(`git diff --quiet HEAD ${path}`, { stdio: "ignore" });
+    return false;
+  } catch (error) {
+    return true;
+  }
+}
+
+async function fixExamples() {
+  await replaceInFile({
+    files: [
+      "example/src/main/java/com/example/Main.java",
+      "kotlin-example/src/main/kotlin/Main.kt",
+    ],
+    from: ["page[before]", "page[after]"],
+    to: "",
+  });
+  await exec("chmod +x example/run.sh kotlin-example/run.sh");
+}
+
+async function build() {
+  const pkgPath = `./packages/${path.basename(path.resolve("."))}`;
+
+  let pkgJson = await readJSON("./package.json");
+  const liblabConfig = await readJSON("./liblab.config.json");
+  console.log(
+    `Building '${pkgJson.name}' using spec '${liblabConfig.specFilePath}'`
+  );
+
+  execSync("npx -y liblab@latest build -y --skip-validation", {
+    stdio: "inherit",
+  });
+
+  await move("output/java/src", "./src");
+
+  if (!hasChangesInPath("./src")) {
+    console.log("No changes detected in output.");
+    return;
+  }
+
+  const artifacts = [
+    "pom.xml",
+    "README.md",
+    "documentation",
+    "example",
+    "kotlin-example",
+  ];
+  for (const artifact of artifacts) {
+    await move(`output/java/${artifact}`, `./${artifact}`);
+  }
+
+  await fixExamples();
+}
+
+void build().finally(() => {
+  fs.rm("output", { recursive: true, force: true });
+});