const assert = require("node:assert/strict");
const { execFileSync } = require("node:child_process");
const { version } = require("../package.json");
const git = (...args) => execFileSync("git", args, { encoding: "utf8" }).trim();

assert.equal(git("status", "--porcelain"), "", "Commit all changes before preparing a release");
const tags = git("tag", "--merged", "HEAD", "--list", "v[0-9]*", "--sort=-version:refname")
  .split("\n").filter(tag => /^v\d+\.\d+\.\d+$/.test(tag));
assert.equal(version, tags[0]?.slice(1) ?? "0.0.0",
  "Version is already prepared or release tags are missing. Fetch tags; finish the existing release before preparing another.");