Added the globalActivity function

lib/index.js

@@ -8,6 +8,8 @@ var Ul = require("ul")
   , IsThere = require("is-there")
   , CliPie = require("cli-pie")
   , CliGhCal = require("cli-gh-cal")
+  , GitLogParser = require("gitlog-parser").parse
+  , Exec = require("child_process").exec
   ;
 
 // Constants
@@ -317,7 +319,7 @@ GitStats.authorsPie = function (options, callback) {
     });
 
     if (!IsThere(options.repo)) {
-        return callback(new Error("Repository is missing."));
+        return callback(new Error("The repository folder doesn't exist."));
     }
 
     var repo = new Gry(options.repo)
@@ -347,3 +349,40 @@ GitStats.authorsPie = function (options, callback) {
         callback(null, pie.toString());
     });
 };
+
+GitStats.globalActivity = function (options, callback) {
+
+    if (typeof options === "string") {
+        options = {
+            repo: options
+        };
+    }
+
+    options.repo = Abs(options.repo);
+
+    if (!IsThere(options.repo)) {
+        return callback(new Error("The repository folder doesn't exist."));
+    }
+
+    var commits = {}
+      , today = null
+      , cal = []
+      ;
+
+    GitLogParser(Exec("git log", { cwd: options.repo }).stdout).on("commit", function(commit) {
+        today = Moment(commit.date).format(DATE_FORMAT);
+        commits[today] = commits[today] || 0;
+        ++commits[today];
+    }).on("error", function (err) {
+        callback(err);
+    }).on("finish", function () {
+        Object.keys(commits).forEach(function (c) {
+            cal.push([c, commits[c]])
+        });
+        callback(null, CliGhCal(cal, {
+            theme: options.theme
+          , start: options.start
+          , end: options.end
+        }));
+    });
+};