Add in Dep for Golang builds

lib/travis/build/script/go.rb

@@ -70,7 +70,7 @@ def install
             sh.echo 'Using Go 1.5 Vendoring, not checking for Godeps'
           end
           sh.else do
-            sh .if '-f Godeps/Godeps.json' do
+            sh.if '-f Godeps/Godeps.json' do
               sh.export 'GOPATH', '${TRAVIS_BUILD_DIR}/Godeps/_workspace:$GOPATH', retry: false
               sh.export 'PATH', '${TRAVIS_BUILD_DIR}/Godeps/_workspace/bin:$PATH', retry: false
 
@@ -81,6 +81,10 @@ def install
                 end
               end
             end
+            sh.elif '-f Gopkg.toml' do 
+              fetch_dep
+              sh.cmd 'dep ensure', retry: true, timing: true, assert: true, echo: true
+            end
           end
 
           sh.if uses_make do
@@ -196,6 +200,21 @@ def update_gimme
             sh.cmd %Q'gimme #{DEFAULTS[:go]} &>/dev/null'
           end
 
+          def fetch_dep
+            dep = "$HOME/gopath/bin/dep"
+
+            sh.mkdir "$HOME/gopath/bin", echo: false, recursive: true
+
+            sh.if "$TRAVIS_OS_NAME = osx" do
+              sh.cmd "curl -sL -o #{dep} https://github.com/golang/dep/releases/download/v0.3.2/dep-darwin-amd64", echo: false
+            end
+            sh.elif "$TRAVIS_OS_NAME = linux" do
+              sh.cmd "curl -sL -o #{dep} https://github.com/golang/dep/releases/download/v0.3.2/dep-linux-amd64", echo: false
+            end
+
+            sh.cmd "chmod +x #{dep}"
+          end
+
           def fetch_godep
             godep = "$HOME/gopath/bin/godep"