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project2/node_modules/shelljs/src/rm.js

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+var common = require('./common');
+var fs = require('fs');
+
+// Recursively removes 'dir'
+// Adapted from https://github.com/ryanmcgrath/wrench-js
+//
+// Copyright (c) 2010 Ryan McGrath
+// Copyright (c) 2012 Artur Adib
+//
+// Licensed under the MIT License
+// http://www.opensource.org/licenses/mit-license.php
+function rmdirSyncRecursive(dir, force) {
+  var files;
+
+  files = fs.readdirSync(dir);
+
+  // Loop through and delete everything in the sub-tree after checking it
+  for(var i = 0; i < files.length; i++) {
+    var file = dir + "/" + files[i],
+        currFile = fs.lstatSync(file);
+
+    if(currFile.isDirectory()) { // Recursive function back to the beginning
+      rmdirSyncRecursive(file, force);
+    }
+
+    else if(currFile.isSymbolicLink()) { // Unlink symlinks
+      if (force || isWriteable(file)) {
+        try {
+          common.unlinkSync(file);
+        } catch (e) {
+          common.error('could not remove file (code '+e.code+'): ' + file, true);
+        }
+      }
+    }
+
+    else // Assume it's a file - perhaps a try/catch belongs here?
+      if (force || isWriteable(file)) {
+        try {
+          common.unlinkSync(file);
+        } catch (e) {
+          common.error('could not remove file (code '+e.code+'): ' + file, true);
+        }
+      }
+  }
+
+  // Now that we know everything in the sub-tree has been deleted, we can delete the main directory.
+  // Huzzah for the shopkeep.
+
+  var result;
+  try {
+    result = fs.rmdirSync(dir);
+  } catch(e) {
+    common.error('could not remove directory (code '+e.code+'): ' + dir, true);
+  }
+
+  return result;
+} // rmdirSyncRecursive
+
+// Hack to determine if file has write permissions for current user
+// Avoids having to check user, group, etc, but it's probably slow
+function isWriteable(file) {
+  var writePermission = true;
+  try {
+    var __fd = fs.openSync(file, 'a');
+    fs.closeSync(__fd);
+  } catch(e) {
+    writePermission = false;
+  }
+
+  return writePermission;
+}
+
+//@
+//@ ### rm([options ,] file [, file ...])
+//@ ### rm([options ,] file_array)
+//@ Available options:
+//@
+//@ + `-f`: force
+//@ + `-r, -R`: recursive
+//@
+//@ Examples:
+//@
+//@ ```javascript
+//@ rm('-rf', '/tmp/*');
+//@ rm('some_file.txt', 'another_file.txt');
+//@ rm(['some_file.txt', 'another_file.txt']); // same as above
+//@ ```
+//@
+//@ Removes files. The wildcard `*` is accepted.
+function _rm(options, files) {
+  options = common.parseOptions(options, {
+    'f': 'force',
+    'r': 'recursive',
+    'R': 'recursive'
+  });
+  if (!files)
+    common.error('no paths given');
+
+  if (typeof files === 'string')
+    files = [].slice.call(arguments, 1);
+  // if it's array leave it as it is
+
+  files = common.expand(files);
+
+  files.forEach(function(file) {
+    if (!fs.existsSync(file)) {
+      // Path does not exist, no force flag given
+      if (!options.force)
+        common.error('no such file or directory: '+file, true);
+
+      return; // skip file
+    }
+
+    // If here, path exists
+
+    var stats = fs.lstatSync(file);
+    if (stats.isFile() || stats.isSymbolicLink()) {
+
+      // Do not check for file writing permissions
+      if (options.force) {
+        common.unlinkSync(file);
+        return;
+      }
+
+      if (isWriteable(file))
+        common.unlinkSync(file);
+      else
+        common.error('permission denied: '+file, true);
+
+      return;
+    } // simple file
+
+    // Path is an existing directory, but no -r flag given
+    if (stats.isDirectory() && !options.recursive) {
+      common.error('path is a directory', true);
+      return; // skip path
+    }
+
+    // Recursively remove existing directory
+    if (stats.isDirectory() && options.recursive) {
+      rmdirSyncRecursive(file, options.force);
+    }
+  }); // forEach(file)
+} // rm
+module.exports = _rm;