feat: export meta object (#162)

* feat: export meta object

* Create strange-humans-enjoy.md

Author: ota-meshi

.changeset/strange-humans-enjoy.md

@@ -0,0 +1,5 @@
+---
+"jsonc-eslint-parser": minor
+---
+
+feat: export meta object

package.json

@@ -10,8 +10,9 @@
     "node": "^12.22.0 || ^14.17.0 || >=16.0.0"
   },
   "scripts": {
-    "build": "npm run build:ts",
-    "build:ts": "tsc --project ./tsconfig.build.json",
+    "build": "npm run build:meta && npm run build:tsc",
+    "build:meta": "ts-node --transpile-only ./tools/update-meta.ts",
+    "build:tsc": "tsc --project ./tsconfig.build.json",
     "clean": "rimraf .nyc_output lib coverage",
     "lint": "eslint . --ext .js,.ts,.json",
     "eslint-fix": "eslint . --ext .js,.ts,.json --fix",
@@ -26,7 +27,7 @@
     "benchmark": "ts-node --transpile-only benchmark/index.ts",
     "prerelease": "npm run clean && npm run build",
     "release": "changeset publish",
-    "version:ci": "changeset version"
+    "version:ci": "env-cmd -e version-ci npm run build:meta && changeset version"
   },
   "repository": {
     "type": "git",
@@ -61,6 +62,7 @@
     "@typescript-eslint/eslint-plugin": "^5.0.0",
     "@typescript-eslint/parser": "^5.0.0",
     "benchmark": "^2.1.4",
+    "env-cmd": "^10.1.0",
     "eslint": "^8.0.0",
     "eslint-config-prettier": "^8.0.0",
     "eslint-plugin-eslint-comments": "^3.2.0",

src/index.ts

@@ -9,8 +9,8 @@ import {
 
 import type * as AST from "./parser/ast";
 import { getVisitorKeys } from "./parser/visitor-keys";
-
-export const name = "jsonc-eslint-parser";
+export * as meta from "./meta";
+export { name } from "./meta";
 
 // parser
 export { parseForESLint };

src/meta.ts

@@ -0,0 +1,5 @@
+// IMPORTANT!
+// This file has been automatically generated,
+// in order to update its content execute "npm run build:meta"
+export const name = "jsonc-eslint-parser" as const;
+export const version = "2.2.0" as const;

tests/src/meta.ts

@@ -0,0 +1,13 @@
+import assert from "assert";
+import * as parser from "../../src";
+import { version } from "../../package.json";
+const expectedMeta = {
+  name: "jsonc-eslint-parser",
+  version,
+};
+
+describe("Test for meta object", () => {
+  it("A parser should have a meta object.", () => {
+    assert.deepStrictEqual(parser.meta, expectedMeta);
+  });
+});

tools/lib/changesets-util.ts

@@ -0,0 +1,11 @@
+import getReleasePlan from "@changesets/get-release-plan";
+import path from "path";
+
+/** Get new version string from changesets */
+export async function getNewVersion(): Promise<string> {
+  const releasePlan = await getReleasePlan(path.resolve(__dirname, "../.."));
+
+  return releasePlan.releases.find(
+    ({ name }) => name === "jsonc-eslint-parser"
+  )!.newVersion;
+}

tools/update-meta.ts

@@ -0,0 +1,38 @@
+import fs from "fs";
+import path from "path";
+import { ESLint } from "eslint";
+import { name, version } from "../package.json";
+import { getNewVersion } from "./lib/changesets-util";
+
+const META_PATH = path.join(__dirname, "../src/meta.ts");
+
+void main();
+
+/** main */
+async function main() {
+  if (!fs.existsSync(META_PATH)) {
+    fs.writeFileSync(META_PATH, "", "utf8");
+  }
+  const eslint = new ESLint({ fix: true });
+  const [result] = await eslint.lintText(
+    `/*
+ * IMPORTANT!
+ * This file has been automatically generated,
+ * in order to update its content execute "npm run build:meta"
+ */
+export const name = ${JSON.stringify(name)} as const;
+export const version = ${JSON.stringify(await getVersion())} as const;
+`,
+    { filePath: META_PATH }
+  );
+  fs.writeFileSync(META_PATH, result.output!);
+}
+
+/** Get version */
+function getVersion() {
+  // eslint-disable-next-line no-process-env -- ignore
+  if (process.env.IN_VERSION_CI_SCRIPT) {
+    return getNewVersion();
+  }
+  return version;
+}

tsconfig.json

@@ -18,7 +18,10 @@
       "*": ["typings/*"]
     },
     "declaration": true,
-    "esModuleInterop": true
+    "esModuleInterop": true,
+    "resolveJsonModule": true,
+
+    "skipLibCheck": true
   },
   "include": [
     "src/**/*",