Drop support for Node.js 10 (#11830)

.github/workflows/prod-test.yml

@@ -92,7 +92,6 @@ jobs:
           - "16.10.0"
           - "14"
           - "12"
-          - "10"
         include:
           - os: "ubuntu-latest"
             node: "16.10.0"
@@ -100,12 +99,8 @@ jobs:
         exclude:
           - os: "macos-latest"
             node: "14"
-          - os: "macos-latest"
-            node: "12"
           - os: "windows-latest"
             node: "14"
-          - os: "windows-latest"
-            node: "12"
     env:
       FULL_TEST: ${{ matrix.FULL_TEST }}
     name: Node.js ${{ matrix.node }} on ${{ matrix.os }}
@@ -121,10 +116,6 @@ jobs:
           node-version: ${{ matrix.node }}
           cache: "yarn"
 
-      - name: Config `ignore-engines=true` (Node.js 10)
-        if: ${{ matrix.node == '10' }}
-        run: yarn config set ignore-engines true
-
       - name: Install Dependencies
         run: yarn install --frozen-lockfile
 

changelog_unreleased/api/11830.md

@@ -0,0 +1,3 @@
+#### [Breaking] Drop support for Node.js 10 (#11830 by @fisker)
+
+The minimal required Node.js version is v12.17.0

scripts/build/build.mjs

@@ -126,7 +126,7 @@ function handleError(error) {
 async function preparePackage() {
   const packageJson = await readJson(path.join(PROJECT_ROOT, "package.json"));
   packageJson.bin = "./bin-prettier.js";
-  packageJson.engines.node = ">=10.13.0";
+  // packageJson.engines.node = ">=10.13.0";
   delete packageJson.dependencies;
   delete packageJson.devDependencies;
   delete packageJson.browserslist;

scripts/build/bundler.mjs

@@ -84,7 +84,7 @@ function getBabelConfig(bundle) {
     compact: bundle.type === "plugin" ? false : "auto",
     exclude: [/\/core-js\//],
   };
-  const targets = { node: "10" };
+  const targets = { node: "12" };
   if (bundle.target === "universal") {
     targets.browsers = packageJson.browserslist;
   }

tests/integration/__tests__/early-exit.js

@@ -2,7 +2,6 @@
 
 const prettier = require("prettier-local");
 const runPrettier = require("../runPrettier.js");
-const { isProduction } = require("../env.js");
 
 describe("show version with --version", () => {
   runPrettier("cli/with-shebang", ["--version"]).test({
@@ -102,9 +101,7 @@ test("node version error", async () => {
     const result = runPrettier("cli", ["--help"]);
     expect(await result.status).toBe(1);
     expect(await result.stderr).toBe(
-      `prettier requires at least version ${
-        isProduction ? "10.13.0" : "12.17.0"
-      } of Node, please upgrade\n`
+      "prettier requires at least version 12.17.0 of Node, please upgrade\n"
     );
     expect(await result.stdout).toBe("");
     expect(await result.write).toEqual([]);