flow like the river

VISUALIZACION/node_modules/command-exists/README.md

@@ -0,0 +1,83 @@
+command-exists
+==============
+
+node module to check if a command-line command exists
+
+
+
+## installation
+
+```bash
+npm install command-exists
+```
+
+## usage
+
+### async
+
+```js
+var commandExists = require('command-exists');
+
+commandExists('ls', function(err, commandExists) {
+
+    if(commandExists) {
+        // proceed confidently knowing this command is available
+    }
+
+});
+```
+### promise
+```js
+var commandExists = require('command-exists');
+
+// invoked without a callback, it returns a promise
+commandExists('ls')
+.then(function(command){
+    // proceed
+}).catch(function(){
+    // command doesn't exist
+});
+```
+
+### sync
+```js
+var commandExistsSync = require('command-exists').sync;
+// returns true/false; doesn't throw
+if (commandExistsSync('ls')) {
+    // proceed
+} else {
+    // ...
+}
+
+```
+
+
+## changelog
+
+### v1.2.7
+
+Removes unnecessary printed output on windows.
+
+### v1.2.6
+
+Small bugfixes.
+
+### v1.2.5
+
+Fix windows bug introduced in 1.2.4.
+
+### v1.2.4
+
+Fix potential security issue.
+
+### v1.2.0
+
+Add support for promises
+
+### v1.1.0
+
+Add synchronous version
+
+### v1.0.2
+
+Support for windows