Enable no-process-exit ESLint rule (#11025)

eslint/babel-eslint-config-internal/index.js

@@ -34,7 +34,7 @@ module.exports = {
     "no-inner-declarations": "off",
     "no-labels": "off",
     "no-loop-func": "off",
-    "no-process-exit": "off",
+    "no-process-exit": "error",
     "no-return-assign": "off",
     "no-shadow": "off",
     "no-underscore-dangle": "off",

packages/babel-compat-data/scripts/build-data.js

@@ -290,7 +290,7 @@ const generateData = (environments, features) => {
   });
 };
 
-["plugin", "corejs2-built-in"].forEach(target => {
+for (const target of ["plugin", "corejs2-built-in"]) {
   const newData = generateData(
     environments,
     require(`./data/${target}-features`)
@@ -305,11 +305,10 @@ const generateData = (environments, features) => {
         "The newly generated plugin/built-in data does not match the current " +
           "files. Re-run `npm run build-data`."
       );
-      process.exit(1);
+      process.exitCode = 1;
+      break;
     }
-
-    process.exit(0);
-  }
-
+  } else {
     fs.writeFileSync(dataPath, `${JSON.stringify(newData, null, 2)}\n`);
-});
+  }
+}

packages/babel-node/src/babel-node.js

@@ -92,7 +92,7 @@ getV8Flags(function(err, v8Flags) {
         if (signal) {
           process.kill(process.pid, signal);
         } else {
-          process.exit(code);
+          process.exitCode = code;
         }
       });
     });

packages/babel-parser/bin/babel-parser.js

@@ -7,10 +7,9 @@ var fs = require("fs");
 var filename = process.argv[2];
 if (!filename) {
   console.error("no filename specified");
-  process.exit(0);
+} else {
+  var file = fs.readFileSync(filename, "utf8");
+  var ast = parser.parse(file);
+
+  console.log(JSON.stringify(ast, null, "  "));
 }
-
-var file = fs.readFileSync(filename, "utf8");
-var ast = parser.parse(file);
-
-console.log(JSON.stringify(ast, null, "  "));

packages/babel-preset-env/scripts/smoke-test.js

@@ -108,4 +108,4 @@ console.log("Cleaning up");
 fs.removeSync(tempFolderPath);
 fs.removeSync(packPath);
 
-process.exit(errorOccurred ? 1 : 0);
+process.exitCode = errorOccurred ? 1 : 0;