1 files changed, 38 insertions, 0 deletions
diff --git a/node_modules/cross-spawn-async/lib/resolveCommand.js b/node_modules/cross-spawn-async/lib/resolveCommand.js
new file mode 100644
index 000000000..391d3d9b0
--- /dev/null
+++ b/node_modules/cross-spawn-async/lib/resolveCommand.js
@@ -0,0 +1,38 @@
+'use strict';
+
+var path = require('path');
+var which = require('which');
+var LRU = require('lru-cache');
+
+var commandCache = new LRU({ max: 50, maxAge: 30 * 1000 });  // Cache just for 30sec
+var hasSepInPathRegExp = new RegExp(process.platform === 'win32' ? /[\/\\]/ : /\//);
+
+function resolveCommand(command, noExtension) {
+    var resolved;
+
+    // If command looks like a file path, make it absolute to make it canonical
+    // and also to circuvent a bug in which, see: https://github.com/npm/node-which/issues/33
+    if (hasSepInPathRegExp.test(command)) {
+        command = path.resolve(command);
+    }
+
+    noExtension = !!noExtension;
+    resolved = commandCache.get(command + '!' + noExtension);
+
+    // Check if its resolved in the cache
+    if (commandCache.has(command)) {
+        return commandCache.get(command);
+    }
+
+    try {
+        resolved = !noExtension ?
+            which.sync(command) :
+            which.sync(command, { pathExt: path.delimiter + (process.env.PATHEXT || '') });
+    } catch (e) { /* empty */ }
+
+    commandCache.set(command + '!' + noExtension, resolved);
+
+    return resolved;
+}
+
+module.exports = resolveCommand;