Start extending to support GitLab authentication.

Add necessary dependency.
Add baseURL parameter for self-hosted GitLab
Add necessary require.
Add block for GitLab auth.
Fix typo
Update font-awesome dependency for GitLab icon.
Use a color closer to GitLab orange.
More direct TODO

lib/auth.js

@@ -4,6 +4,7 @@ var passport = require('passport');
 var FacebookStrategy = require('passport-facebook').Strategy;
 var TwitterStrategy = require('passport-twitter').Strategy;
 var GithubStrategy = require('passport-github').Strategy;
+var GitlabStrategy = require('passport-gitlab2').Strategy;
 var DropboxStrategy = require('passport-dropbox-oauth2').Strategy;
 
 //core
@@ -56,6 +57,15 @@ if (config.github) {
         callbackURL: config.serverurl + '/auth/github/callback'
     }, callback));
 }
+//gitlab
+if (config.gitlab) {
+    passport.use(new GitlabStrategy({
+        baseURL: config.gitlab.baseURL,
+        clientID: config.gitlab.clientID,
+        clientSecret: config.gitlab.clientSecret,
+        callbackURL: config.serverurl + '/auth/gitlab/callback'
+    }, callback));
+}
 //dropbox
 if (config.dropbox) {
     passport.use(new DropboxStrategy({

lib/config.js

@@ -59,6 +59,7 @@ var documentmaxlength = config.documentmaxlength || 100000;
 var facebook = config.facebook || false;
 var twitter = config.twitter || false;
 var github = config.github || false;
+var gitlab = config.gitlab || false;
 var dropbox = config.dropbox || false;
 var imgur = config.imgur || false;
 
@@ -110,6 +111,7 @@ module.exports = {
     facebook: facebook,
     twitter: twitter,
     github: github,
+    gitlab: gitlab,
     dropbox: dropbox,
     imgur: imgur
 };

lib/response.js

@@ -94,6 +94,7 @@ function showIndex(req, res, next) {
         facebook: config.facebook,
         twitter: config.twitter,
         github: config.github,
+        gitlab: config.gitlab,
         dropbox: config.dropbox,
     });
     res.write(content);
@@ -124,6 +125,7 @@ function responseHackMD(res, note) {
         facebook: config.facebook,
         twitter: config.twitter,
         github: config.github,
+        gitlab: config.gitlab,
         dropbox: config.dropbox,
     });
     var buf = html;