Fix client.version to reflect @apollo/client version.

CHANGELOG.md

@@ -1,3 +1,10 @@
+## Apollo Client 3.3.5
+
+### Improvements
+
+- Restore `client.version` property, reflecting the current `@apollo/client` version from `package.json`. <br/>
+  [@benjamn](https://github.com/benjamn) in [#7448](https://github.com/apollographql/apollo-client/pull/7448)
+
 ## Apollo Client 3.3.4
 
 ### Improvements

config/version.js

@@ -0,0 +1,66 @@
+const assert = require("assert");
+const fs = require("fs");
+const path = require("path");
+const distRoot = path.join(__dirname, "..", "dist");
+const versionPath = path.join(distRoot, "version.js");
+const pkgJsonPath = path.join(__dirname, "..", "package.json");
+
+const { version } = JSON.parse(fs.readFileSync(pkgJsonPath));
+assert.strictEqual(
+  typeof version, "string",
+  '"version" field missing from package.json',
+);
+
+switch (process.argv[2]) {
+  case "update": {
+    const updated = fs
+      .readFileSync(versionPath, "utf8")
+      .replace(/\blocal\b/, version);
+
+    assert.notEqual(
+      updated.indexOf(version), -1,
+      "Failed to update dist/version.js with @apollo/client version",
+    );
+
+    fs.writeFileSync(versionPath, updated);
+
+    break;
+  }
+
+  case "verify": {
+    const {
+      ApolloClient,
+      InMemoryCache,
+    } = require(path.join(distRoot, "core", "core.cjs.js"));
+
+    // Though this may seem like overkill, verifying that ApolloClient is
+    // constructible in Node.js is actually pretty useful, too!
+    const client = new ApolloClient({
+      cache: new InMemoryCache,
+    });
+
+    // Probably not necessary, but it seems wise to clean up any resources
+    // the client might have acquired during its construction.
+    client.stop();
+
+    // The CommonJS dist/core/core.cjs.js file is generated from ESM modules
+    // generated by tsc, including dist/version.js, so verifying core.cjs.js
+    // exports an ApolloClient class that defines client.version also serves
+    // to verify that dist/version.js must have been correctly updated,
+    // which is convenient because dist/version.js uses ECMAScript module
+    // syntax, and is thus not importable in all versions of Node.js.
+    assert.strictEqual(
+      client.version, version,
+      "Failed to update dist/version.js and dist/core/core.cjs.js",
+    );
+
+    break;
+  }
+
+  default:
+    throw new Error(
+      "Pass either 'update' or 'verify' to config/version.js"
+    );
+}
+
+console.log("ok");

package.json

@@ -33,7 +33,9 @@
   "scripts": {
     "prebuild": "npm run clean",
     "build": "tsc",
-    "postbuild": "npm run invariants && npm run sourcemaps && npm run rollup && npm run prepdist && npm run resolve",
+    "postbuild": "npm run update-version && npm run invariants && npm run sourcemaps && npm run rollup && npm run prepdist && npm run resolve && npm run verify-version",
+    "update-version": "node config/version.js update",
+    "verify-version": "node config/version.js verify",
     "invariants": "ts-node-script config/processInvariants.ts",
     "sourcemaps": "ts-node-script config/rewriteSourceMaps.ts",
     "rollup": "rollup -c ./config/rollup.config.js",