fix: add policy file to git

Some users are forgetting to add their policy file to git, and then sending up their projects to CI systems like travis, which fail because the policy isn't in place.

This helps mitigate this problem for them. Note that we do not commit the file, I feel that this would be too far.

cli/commands/protect/wizard.js

@@ -14,6 +14,7 @@ var tryRequire = require('snyk-try-require');
 var chalk = require('chalk');
 var url = require('url');
 var _ = require('lodash');
+var exec = require('child_process').exec;
 var undefsafe = require('undefsafe');
 var auth = require('../auth');
 var getVersion = require('../version');
@@ -211,7 +212,24 @@ function processAnswers(answers, policy, options) {
       throw e;
     }
 
-    return snyk.policy.save(policy, cwd, spinner);
+    return snyk.policy.save(policy, cwd, spinner).then(function () {
+      return new Promise(function (resolve) {
+        exec('git add .snyk', {
+          cwd: cwd,
+        }, function (error, stdout, stderr) {
+          if (error) {
+            debug('error adding .snyk to git', error);
+          }
+
+          if (stderr) {
+            debug('stderr adding .snyk to git', stderr.trim());
+          }
+
+          // resolve either way
+          resolve();
+        });
+      });
+    });
   })
   .then(function () {
     // re-read the package.json - because the generatePolicy can apply
@@ -367,4 +385,4 @@ function processAnswers(answers, policy, options) {
   });
 
   return res;
-}
+}