src: added node --run-in

Author: mertcanaltin

doc/api/cli.md

@@ -2298,6 +2298,16 @@ The following environment variables are set when running a script with `--run`:
 * `NODE_RUN_PACKAGE_JSON_PATH`: The path to the `package.json` that is being
   processed.
 
+### `--run-in=<dir>`
+
+Run a package.json script in a custom working directory.
+
+For example:
+
+```console
+$ node --run-in=/path/to/dir --run test
+```
+
 ### `--secure-heap-min=n`
 
 <!-- YAML

src/node_options.cc

@@ -1216,6 +1216,9 @@ PerProcessOptionsParser::PerProcessOptionsParser(
   AddOption("--run",
             "Run a script specified in package.json",
             &PerProcessOptions::run);
+  AddOption("--run-in",
+            "Run a package.json script in a custom working directory",
+            &PerProcessOptions::run_in);
   AddOption(
       "--disable-wasm-trap-handler",
       "Disable trap-handler-based WebAssembly bound checks. V8 will insert "

src/node_options.h

@@ -327,6 +327,7 @@ class PerProcessOptions : public Options {
   bool print_version = false;
   std::string experimental_sea_config;
   std::string run;
+  std::string run_in;
 
 #ifdef NODE_HAVE_I18N_SUPPORT
   std::string icu_data_dir;

src/node_task_runner.cc

@@ -206,7 +206,12 @@ void ProcessRunner::OnExit(int64_t exit_status, int term_signal) {
 
 void ProcessRunner::Run() {
   // keeps the string alive until destructor
-  cwd = package_json_path_.parent_path().string();
+  std::string working_dir;
+  if (!node::per_process::cli_options->run_in.empty())
+    working_dir = node::per_process::cli_options->run_in;
+  else
+    working_dir = package_json_path_.parent_path().string();
+  cwd = working_dir;
   options_.cwd = cwd.c_str();
   if (int r = uv_spawn(loop_, &process_, &options_)) {
     fprintf(stderr, "Error: %s\n", uv_strerror(r));

test/parallel/test-node-run.js

@@ -222,4 +222,19 @@ describe('node --run [command]', () => {
     assert.strictEqual(child.stdout, '');
     assert.strictEqual(child.code, 1);
   });
+
+  it('runs script in a custom working directory using --run-in', async () => {
+    const customDir = fixtures.path('run-script');
+    const child = await common.spawnPromisified(
+      process.execPath,
+      [ '--run-in', customDir, '--run', `pwd${envSuffix}` ],
+
+      { cwd: fixtures.path('run-script/sub-directory') }
+    );
+
+    assert.strictEqual(child.stdout.trim(), customDir);
+    assert.strictEqual(child.stderr, '');
+    assert.strictEqual(child.code, 0);
+  });
+
 });