Added reengineered version file creating module.

scripts/version.mjs

@@ -0,0 +1,65 @@
+import { readFileSync, write, writeFileSync } from "fs";
+import { execSync } from "child_process";
+import semver from "semver";
+
+export function getGitVersion() {
+  let rawGitVersion;
+  let gitVersion;
+
+  try {
+    rawGitVersion = execSync("git describe --tags --dirty").toString().trim();
+    gitVersion = semver.coerce(rawGitVersion) || semver.coerce("0.0.0");
+  } catch (e) {
+    return "0.0.0";
+  }
+
+  // Git describe may return versions like v1.2.3-4-gabcdef
+  // or v1.2.3-dirty or v1.2.3 or v1.2.3-4-gabcdef-dirty.
+  // We need to return either a clean version or
+  // append -dev for modified versions and
+  // -dirty for dirty working tree.
+  if (rawGitVersion.endsWith("-dirty")) {
+    return gitVersion.version + "-dirty";
+  } else if (rawGitVersion.includes("-")) {
+    return gitVersion.version + "-dev";
+  } else {
+    return gitVersion.version || "0.0.0";
+  }
+}
+
+export function generateVersionFile(versionFilePath) {
+  // Read package.json version
+  const packageVersion = JSON.parse(
+    readFileSync("package.json", { encoding: "utf-8" }),
+  ).version;
+  // Get version from git repository
+  const gitVersion = getGitVersion();
+  const gitBaseVersion = semver.coerce(gitVersion)?.version;
+
+  // if git returned malformed version, throw error
+  if (!gitBaseVersion || gitBaseVersion === "0.0.0") {
+    throw new Error(
+      "Cannot determine git version. Make sure the script is run in a git repository with tags.",
+    );
+  }
+
+  // Compare git version with package.json version
+  if (semver.neq(gitBaseVersion, packageVersion)) {
+    throw new Error(
+      `Version mismatch: package.json version is ${packageVersion}, but git version is ${gitBaseVersion}`,
+    );
+  }
+
+  // Generate version file
+  const buildDate = new Date().toISOString();
+  writeFileSync(
+    versionFilePath,
+    `// Auto-generated version file - do not edit manually
+// Generated at: ${buildDate}
+
+export const VERSION = '${packageVersion}';
+export const IS_RELEASE = ${gitVersion === packageVersion};
+export const BUILD_TIME = '${buildDate}';
+`,
+  );
+}