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node_modules/shelljs/src/cd.js

@@ -0,0 +1,36 @@
+var fs = require('fs');
+var common = require('./common');
+
+//@
+//@ ### cd([dir])
+//@ Changes to directory `dir` for the duration of the script. Changes to home
+//@ directory if no argument is supplied.
+function _cd(options, dir) {
+  if (!dir)
+    dir = common.getUserHome();
+
+  if (dir === '-') {
+    if (!process.env.OLDPWD)
+      common.error('could not find previous directory');
+    else
+      dir = process.env.OLDPWD;
+  }
+
+  try {
+    var curDir = process.cwd();
+    process.chdir(dir);
+    process.env.OLDPWD = curDir;
+  } catch (e) {
+    // something went wrong, let's figure out the error
+    var err;
+    try {
+      fs.statSync(dir); // if this succeeds, it must be some sort of file
+      err = 'not a directory: ' + dir;
+    } catch (e) {
+      err = 'no such file or directory: ' + dir;
+    }
+    if (err) common.error(err);
+  }
+  return new common.ShellString('', common.state.error, common.state.errorCode);
+}
+module.exports = _cd;