ci: check that the specified msrv is tested correctly

.github/workflows/release.yml

@@ -55,14 +55,22 @@ jobs:
       - run: cargo fmt --check --all
       - run: cargo doc --workspace --no-deps
 
+  # region: check-min-version
   min-version:
     name: Check minimum Rust version
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - uses: dtolnay/[email protected]
+      - name: Install Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 22
+      - name: Check MSRV
+        run: yarn check-msrv
+      - uses: dtolnay/[email protected]
       - uses: Swatinem/rust-cache@v2
       - run: cargo check --workspace
+  # end-region: check-min-version
 
   build:
     strategy:

package.json

@@ -20,7 +20,8 @@
     "docs:rs": "cargo doc --workspace --no-deps",
     "test:grammar": "cd syntaxes/textmate && yarn run test",
     "build:typlite": "cargo build --bin typlite",
-    "typlite": "target/debug/typlite"
+    "typlite": "target/debug/typlite",
+    "check-msrv": "node scripts/check-msrv.mjs"
   },
   "dependencies": {},
   "devDependencies": {

scripts/check-msrv.mjs

@@ -0,0 +1,39 @@
+import fs from 'fs';
+
+const ciFile = fs.readFileSync('.github/workflows/release.yml', 'utf-8');
+
+const checkMinVersion = ciFile.match(/# region: check-min-version([\s\S]+?)# end-region: check-min-version/mg);
+if (!checkMinVersion) {
+    console.error('Check minimum version not found');
+    process.exit(1);
+}
+
+const ciCheck = checkMinVersion[0];
+// dtolnay/[email protected]
+const ciCheckedVersion = ciCheck.match(/dtolnay\/rust-toolchain@(\d+\.\d+\.\d+)/)[1];
+
+const cargoToml = fs.readFileSync('Cargo.toml', 'utf-8');
+// rust-version = "1.82"
+const cargoSpecifiedVersion = cargoToml.match(/rust-version = "(\d+\.\d+)"/)[1];
+
+function parseVersion(version) {
+    const versions = version.split('.').map(Number);
+    if (versions.length === 2) {
+        versions.push(0);
+    }
+    if (versions.length !== 3) {
+        throw new Error(`Invalid version: ${version}`);
+    }
+    return versions;
+}
+
+const specified = parseVersion(cargoSpecifiedVersion);
+const checked = parseVersion(ciCheckedVersion);
+if (
+    specified[0] < checked[0] ||
+    (specified[0] === checked[0] && specified[1] < checked[1]) ||
+    (specified[0] === checked[0] && specified[1] === checked[1] && specified[2] < checked[2])
+) {
+    console.error(`Specified version ${cargoSpecifiedVersion} is less than checked version ${ciCheckedVersion}`);
+    process.exit(1);
+}