Repository: nodejs/node
Pull request: src: fix `--build-sea` default executable path

Fixes https://github.com/nodejs/node/issues/61579

<!--
Before submitting a pull request, please read:

- the CONTRIBUTING guide at https://github.com/nodejs/node/blob/HEAD/CONTRIBUTING.md
- the commit message formatting guidelines at
  https://github.com/nodejs/node/blob/HEAD/doc/contributing/pull-requests.md#commit-message-guidelines

For code changes:
1. Include tests for any bug fixes or new features.
2. Update documentation if relevant.
3. Ensure that `make -j4 test` (UNIX), or `vcbuild test` (Windows) passes.

If you believe this PR should be highlighted in the Node.js CHANGELOG
please add the `notable-change` label.

Developer's Certificate of Origin 1.1

By making a contribution to this project, I certify that:

(a) The contribution was created in whole or in part by me and I
    have the right to submit it under the open source license
    indicated in the file; or

(b) The contribution is based upon previous work that, to the best
    of my knowledge, is covered under an appropriate open source
    license and I have the right under that license to submit that
    work with modifications, whether created in whole or in part
    by me, under the same open source license (unless I am
    permitted to submit under a different license), as indicated
    in the file; or

(c) The contribution was provided directly to me by some other
    person who certified (a), (b) or (c) and I have not modified
    it.

(d) I understand and agree that this project and the contribution
    are public and that a record of the contribution (including all
    personal information I submit with it, including my sign-off) is
    maintained indefinitely and may be redistributed consistent with
    this project or the open source license(s) involved.
-->


Changed files:
filename: src/node_sea_bin.cc
patch: @@ -388,7 +388,7 @@ ExitCode BuildSingleExecutable(const std::string& sea_config_path,
 
   SeaConfig config = opt_config.value();
   if (config.executable_path.empty()) {
-    config.executable_path = args[0];
+    config.executable_path = Environment::GetExecPath(args);
   }
 
   // Get file permissions from source executable to copy over later.

filename: test/sea/test-build-sea-custom-argv0.js
patch: @@ -0,0 +1,34 @@
+'use strict';
+// This tests --build-sea with a custom argv0 value.
+
+require('../common');
+
+const { skipIfBuildSEAIsNotSupported } = require('../common/sea');
+
+skipIfBuildSEAIsNotSupported();
+
+const tmpdir = require('../common/tmpdir');
+const fixtures = require('../common/fixtures');
+const { copyFileSync } = require('fs');
+
+const { spawnSyncAndAssert } = require('../common/child_process');
+tmpdir.refresh();
+
+copyFileSync(
+  fixtures.path('sea', 'basic', 'sea-config.json'),
+  tmpdir.resolve('sea-config.json'),
+);
+
+copyFileSync(
+  fixtures.path('sea', 'basic', 'sea.js'),
+  tmpdir.resolve('sea.js'),
+);
+
+spawnSyncAndAssert(
+  process.execPath,
+  ['--build-sea', tmpdir.resolve('sea-config.json')], {
+    cwd: tmpdir.path,
+    argv0: 'argv0',
+  }, {
+    stdout: /Generated single executable/,
+  });