fix: handle unhandled "write EPIPE" error (#306)

* fix: handle unhandled "write EPIPE" error

Killing webpack during the running typechecks on Node 12 could cause an unhandled error

* fix: do not omit "non-null assertion" operator

* style: resolve tslint warning

* fix: upgrade Node typing to v11

* test: add Node v12 to test environments

Author: deftomat

.travis.yml

@@ -5,6 +5,7 @@ os:
 
 language: node_js
 node_js:
+  - 12
   - 10
   - 8
 

package.json

@@ -114,7 +114,7 @@
     "@types/micromatch": "^3.1.0",
     "@types/minimatch": "^3.0.1",
     "@types/mock-require": "^2.0.0",
-    "@types/node": "^8.10.38",
+    "@types/node": "^11.0.0",
     "@types/rimraf": "^2.0.2",
     "@types/semver": "^5.5.0",
     "@types/webpack": "^4.4.19",

src/cluster.ts

@@ -15,7 +15,7 @@ for (let num = 0; num < division; num++) {
   workers.push(
     childProcess.fork(path.resolve(__dirname, './service.js'), [], {
       execArgv: ['--max-old-space-size=' + process.env.MEMORY_LIMIT],
-      env: { ...process.env, WORK_NUMBER: num },
+      env: { ...process.env, WORK_NUMBER: num.toString() },
       stdio: ['inherit', 'inherit', 'inherit', 'ipc']
     })
   );

src/service.ts

@@ -23,7 +23,11 @@ import { createEslinter } from './createEslinter';
 
 const rpc = new RpcProvider(message => {
   try {
-    process.send!(message);
+    process.send!(message, undefined, undefined, error => {
+      if (error) {
+        process.exit();
+      }
+    });
   } catch (e) {
     // channel closed...
     process.exit();

yarn.lock

@@ -1208,10 +1208,10 @@
   version "10.12.18"
   resolved "https://registry.yarnpkg.com/@types/node/-/node-10.12.18.tgz#1d3ca764718915584fcd9f6344621b7672665c67"
 
-"@types/node@^8.10.38":
-  version "8.10.47"
-  resolved "https://registry.yarnpkg.com/@types/node/-/node-8.10.47.tgz#e19b2f50f68697013db9e8abb5ad3ddc30faaa0b"
-  integrity sha512-HshJQ2myCc05qYuR99HvJRK5rWOPwKLumVDrpizY58OJUVEgRwd7RtxqDOOi350VGxFI8hrCtjR7IaDfo0S12Q==
+"@types/node@^11.0.0":
+  version "11.13.17"
+  resolved "https://registry.yarnpkg.com/@types/node/-/node-11.13.17.tgz#2e7efbfe5253561087812571e5e6a1e4b1d6295b"
+  integrity sha512-7W3kSMa8diVH6s24a8Qrmvwu+vG3ahOC/flMHFdWSdnPYoQI0yPO84h5zOWYXAha2Npn3Pw3SSuQSwBUfaniyQ==
 
 "@types/retry@^0.12.0":
   version "0.12.0"