feat(utils/exec): adds exec

package.json

@@ -59,6 +59,7 @@
     "@pika/pack": "^0.3.6",
     "@types/find-up": "^2.1.1",
     "@types/jest": "^24.0.9",
+    "@types/lodash.clone": "^4.5.6",
     "@types/pify": "^3.0.2",
     "@typescript-eslint/eslint-plugin": "^1.6.0",
     "@typescript-eslint/parser": "^1.6.0",
@@ -100,7 +101,9 @@
   },
   "dependencies": {
     "find-up": "^3.0.0",
-    "pify": "^4.0.1"
+    "lodash.clone": "^4.5.0",
+    "pify": "^4.0.1",
+    "spawn-command": "0.0.2-1"
   },
   "husky": {
     "hooks": {

src/@types/spawn-command.ts

@@ -0,0 +1,8 @@
+declare module 'spawn-command' {
+  import { ChildProcess, SpawnOptions } from 'child_process';
+
+  export default function sc(
+    command: string,
+    options?: SpawnOptions
+  ): ChildProcess;
+}

src/constants.ts

@@ -1,2 +1,4 @@
 // Default configuration file name
 export const FILE_NAME = 'kpo.scripts';
+// Default stdio for spawned commands
+export const DEFAULT_STDIO = 'inherit';

src/utils/exec.ts

@@ -0,0 +1,30 @@
+import sc from 'spawn-command';
+import ensure from './ensure';
+import clone from 'lodash.clone';
+import { ChildProcess, SpawnOptions } from 'child_process';
+import { DEFAULT_STDIO } from '~/constants';
+
+export interface IExec {
+  ps: ChildProcess;
+  promise: Promise<void>;
+}
+
+export default function exec(command: string, options: SpawnOptions): IExec {
+  const opts: SpawnOptions = options ? Object.assign({}, options) : {};
+
+  if (!opts.stdio) opts.stdio = DEFAULT_STDIO;
+  if (!opts.env) opts.env = clone(process.env);
+
+  const ps = sc(command, opts);
+  return {
+    ps,
+    promise: new Promise((resolve, reject) => {
+      ps.on('close', (code: number) => {
+        return code ? reject(Error(`Failed: ${command}`)) : resolve();
+      });
+      ps.on('error', (err: any) => {
+        return reject(ensure.error(err));
+      });
+    })
+  };
+}