[BUMP] automation for version bumps (#605)

* [BUILD] added npm version/postversion and script to bump transport and package json
* [BUILD] added script to bump the version

bin/update-transport-version.ts

@@ -0,0 +1,112 @@
+/*
+ * Copyright 2021 The NATS Authors
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+type SemVer = {
+  major: number;
+  minor: number;
+  micro: number;
+  qualifier: number;
+};
+function parseSemVer(
+  s = "",
+): SemVer {
+  const m = s.match(/(\d+).(\d+).(\d+)(.*)/);
+  if (m) {
+    let qualifier = Number.MAX_SAFE_INTEGER;
+    if (m[4] !== null) {
+      const mm = m[4].match(/(\d+)/);
+      if (mm) {
+        qualifier = parseInt(mm[1]);
+      }
+    }
+    return {
+      major: parseInt(m[1]),
+      minor: parseInt(m[2]),
+      micro: parseInt(m[3]),
+      qualifier,
+    };
+  }
+  throw new Error(`'${s}' is not a semver value`);
+}
+function compare(a: SemVer, b: SemVer): number {
+  if (a.major < b.major) return -1;
+  if (a.major > b.major) return 1;
+  if (a.minor < b.minor) return -1;
+  if (a.minor > b.minor) return 1;
+  if (a.micro < b.micro) return -1;
+  if (a.micro > b.micro) return 1;
+  if (a.qualifier < b.qualifier) return -1;
+  if (a.qualifier > b.qualifier) return 1;
+
+  return 0;
+}
+
+const SRC = "src/node_transport.ts";
+async function getPackageVersion(): Promise<string> {
+  const pkg = await Deno.readTextFile("package.json");
+  const m = JSON.parse(pkg);
+  return m.version;
+}
+
+async function replaceSourceVersion(from: string, to: string): Promise<void> {
+  const src = await Deno.readTextFile(SRC);
+  const s = `const VERSION = "${from}";`;
+  const t = `const VERSION = "${to}";`;
+  const w = src.replace(s, t);
+  await Deno.writeTextFile(SRC, w);
+}
+
+async function getSourceVersion(): Promise<string> {
+  const src = await Deno.readTextFile(SRC);
+  const lines = src.split("\n");
+  const line = lines.find((txt) => {
+    return txt.indexOf("const VERSION") === 0;
+  });
+
+  if (!line) {
+    return Promise.reject(new Error("didn't find 'const VERSION'"));
+  }
+  const chunks = line?.split(" ");
+  if (
+    chunks.length === 4 &&
+    chunks[0] === "const" &&
+    chunks[1] === "VERSION" &&
+    chunks[2] === "="
+  ) {
+    const v = chunks[3].replace(";", "");
+    return JSON.parse(v);
+  } else {
+    return Promise.reject(`unable to parse ${line}`);
+  }
+}
+try {
+  const pv = await getPackageVersion();
+  const sv = await await getSourceVersion();
+  const pkg = parseSemVer(pv);
+  const src = parseSemVer(sv);
+
+  if (compare(pkg, src) <= 0) {
+    throw new Error(
+      `package version is not greater than source was expected ${pv} > ${sv}`,
+    );
+  }
+
+  await replaceSourceVersion(sv, pv);
+} catch (err) {
+  console.error(`[ERROR] ${err.message}`);
+  Deno.exit(1);
+}
+
+Deno.exit(0);

package.json

@@ -53,7 +53,11 @@
     "stage": "npm run clean && npm run clone-nbc && npm run cjs && shx rm -Rf ./deps/ && npm run build",
     "cover:html": "nyc report --reporter=html && open coverage/index.html",
     "coveralls": "shx mkdir -p ./coverage && nyc report --reporter=text-lcov > ./coverage/lcov.info",
-    "check-package": "deno run --allow-all bin/check-bundle-version.ts"
+    "check-package": "deno run --allow-all bin/check-bundle-version.ts",
+    "version": "deno run -A bin/update-transport-version.ts && git add src/node_transport.ts",
+    "postversion": "git push && git push --tags",
+    "bump-qualifier": "npm version prerelease --no-commit-hooks --no-git-tag-version",
+    "bump-release": "npm version patch --no-commit-hooks --no-git-tag-version"
   },
   "engines": {
     "node": ">= 14.0.0"