Add version bump script

script/version_bump.js

@@ -0,0 +1,52 @@
+#!/usr/bin/env node
+const fs = require("fs");
+const util = require("util");
+const exec = util.promisify(require("child_process").exec);
+
+function patch(version) {
+  const parts = version.split(".");
+  return `${parts[0]}.${Number(parts[1]) + 1}`;
+}
+
+function today(version) {
+  const now = new Date();
+  return `${now.getFullYear()}${now.getMonth() + 1}${now.getDate()}.0`;
+}
+
+const methods = {
+  patch,
+  today,
+};
+
+async function main(args) {
+  const method = args.length > 0 && methods[args[0]];
+  const commit = args.length > 1 && args[1] == "--commit";
+
+  if (!method) {
+    console.error(
+      "Missing required method. Choose from",
+      Object.keys(methods).join(", ")
+    );
+    return;
+  }
+
+  const setup = fs.readFileSync("setup.py", "utf8");
+  const version = setup.match(/\d{8}\.\d+/)[0];
+  const newVersion = method(version);
+
+  console.log("Current version:", version);
+  console.log("New version:", newVersion);
+
+  fs.writeFileSync("setup.py", setup.replace(version, newVersion), "utf-8");
+
+  if (!commit) {
+    return;
+  }
+
+  const { stdout } = await exec(
+    `git commit -am "Bumped version to ${newVersion}"`
+  );
+  console.log(stdout);
+}
+
+main(process.argv.slice(2));