Add script to sync engines with core version

package.json

@@ -22,14 +22,15 @@
     "unlink-all": "node scripts/unlink-all.js packages",
     "check": "flow check",
     "lint": "eslint . && prettier \"./packages/*/*/{src,bin,test}/**/*.{js,json,md}\" --list-different && cargo fmt --all -- --check",
-    "prepublishOnly": "yarn build && yarn build-ts && node scripts/update-config-dependencies.js",
+    "prepublishOnly": "yarn build && yarn build-ts && yarn adjust-versions",
     "test:unit": "cross-env NODE_ENV=test mocha",
     "test:integration": "yarn workspace @parcel/integration-tests test",
     "test:integration-ci": "yarn workspace @parcel/integration-tests test-ci",
     "test": "yarn test:unit && yarn test:integration",
     "nightly:release": "lerna publish -y --canary --preid nightly --dist-tag=nightly --exact --force-publish=* --no-git-tag-version --no-push",
-    "tag:prerelease": "lerna version --exact --force-publish=* --no-git-tag-version --no-push && node scripts/update-config-dependencies.js",
-    "tag:release": "lerna version --force-publish=* --no-git-tag-version --no-push && node scripts/update-config-dependencies.js",
+    "tag:prerelease": "lerna version --exact --force-publish=* --no-git-tag-version --no-push && yarn adjust-versions",
+    "tag:release": "lerna version --force-publish=* --no-git-tag-version --no-push && yarn adjust-versions",
+    "adjust-versions": "node scripts/update-config-dependencies.js && node scripts/update-engines.j",
     "release": "lerna publish -y from-package --pre-dist-tag=next --no-git-tag-version --no-push",
     "prepare": "husky install"
   },

scripts/update-engines.js

@@ -0,0 +1,28 @@
+const fs = require('fs');
+const path = require('path');
+const exec = require('child_process').execSync;
+
+let packages = JSON.parse(
+  exec(
+    `${path.join(__dirname, '..', 'node_modules', '.bin', 'lerna')} ls  --json`,
+  ),
+);
+let packageVersions = new Map(
+  packages.map(pkg => [
+    pkg.name,
+    {version: pkg.version, location: pkg.location},
+  ]),
+);
+let coreVersion = packageVersions.get('@parcel/core').version;
+let coreRange = coreVersion.includes('nightly')
+  ? coreVersion
+  : `^${coreVersion}`;
+
+for (let [, {location}] of packageVersions) {
+  let pkgPath = path.join(location, 'package.json');
+  let pkg = JSON.parse(fs.readFileSync(pkgPath, 'utf8'));
+  if (pkg.engines?.parcel != null) {
+    pkg.engines.parcel = coreRange;
+    fs.writeFileSync(pkgPath, JSON.stringify(pkg, null, 2) + '\n');
+  }
+}