From 2b2e48a4b91a4b636ae0e603968bd764697d1e57 Mon Sep 17 00:00:00 2001
From: Ben Noordhuis <info@bnoordhuis.nl>
Date: Wed, 18 Mar 2015 22:31:16 +0100
Subject: [PATCH] lib: don't error in repl when cwd doesn't exist
MIME-Version: 1.0
Content-Type: text/plain; charset=utf8
Content-Transfer-Encoding: 8bit

The current working directory may not exist when the REPL starts up.
Don't treat that as an error because it's still possible to do many
useful things.  This is like the previous commit but for the REPL.

Fixes: https://github.com/iojs/io.js/issues/1184
PR-URL: https://github.com/iojs/io.js/pull/1194
Reviewed-By: Johan Bergström <bugs@bergstroem.nu>
Reviewed-By: Rod Vagg <rod@vagg.org>
---
 lib/repl.js                           | 12 ++++++++++--
 test/parallel/test-cwd-enoent-repl.js | 26 ++++++++++++++++++++++++++
 2 files changed, 36 insertions(+), 2 deletions(-)
 create mode 100644 test/parallel/test-cwd-enoent-repl.js

diff --git a/lib/repl.js b/lib/repl.js
index 0a63f32..036b561 100644
--- a/lib/repl.js
+++ b/lib/repl.js
@@ -40,8 +40,16 @@ function hasOwnProperty(obj, prop) {
 }
 
 
-// hack for require.resolve("./relative") to work properly.
-module.filename = path.resolve('repl');
+try {
+  // hack for require.resolve("./relative") to work properly.
+  module.filename = path.resolve('repl');
+} catch (e) {
+  // path.resolve('repl') fails when the current working directory has been
+  // deleted.  Fall back to the directory name of the (absolute) executable
+  // path.  It's not really correct but what are the alternatives?
+  const dirname = path.dirname(process.execPath);
+  module.filename = path.resolve(dirname, 'repl');
+}
 
 // hack for repl require to work properly with node_modules folders
 module.paths = require('module')._nodeModulePaths(module.filename);
diff --git a/test/parallel/test-cwd-enoent-repl.js b/test/parallel/test-cwd-enoent-repl.js
new file mode 100644
index 0000000..64538f8
--- /dev/null
+++ b/test/parallel/test-cwd-enoent-repl.js
@@ -0,0 +1,26 @@
+var common = require('../common');
+var assert = require('assert');
+var fs = require('fs');
+var spawn = require('child_process').spawn;
+
+// Fails with EINVAL on SmartOS, EBUSY on Windows.
+if (process.platform === 'sunos' || process.platform === 'win32') {
+  console.log('1..0 # Skipped: cannot rmdir current working directory');
+  return;
+}
+
+var dirname = common.tmpDir + '/cwd-does-not-exist-' + process.pid;
+fs.mkdirSync(dirname);
+process.chdir(dirname);
+fs.rmdirSync(dirname);
+
+var proc = spawn(process.execPath, ['--interactive']);
+proc.stdout.pipe(process.stdout);
+proc.stderr.pipe(process.stderr);
+proc.stdin.write('require("path");\n');
+proc.stdin.write('process.exit(42);\n');
+
+proc.once('exit', common.mustCall(function(exitCode, signalCode) {
+  assert.equal(exitCode, 42);
+  assert.equal(signalCode, null);
+}));
-- 
2.7.4