(coverage) merge coverage.txt file, add codecov badge and upload

.travis.yml

@@ -17,6 +17,9 @@ script:
   - ssh-add ~/.ssh/id_rsa
   - make test
 
+after_success:
+  - bash <(curl -s https://codecov.io/bash)
+
 deploy:
   provider: script
   script: curl -sL https://git.io/goreleaser | bash

Makefile

@@ -3,5 +3,9 @@ test:
 
 internal-test:
 	mv testdata/test.git testdata/.git
-	go test ./...
+	go test -coverprofile=coverage-git.out -covermode=count github.com/zaquestion/lab/internal/git
+	go test -coverprofile=coverage-gitlab.out -covermode=count github.com/zaquestion/lab/internal/gitlab
+	go test github.com/zaquestion/lab/cmd
 	mv testdata/.git testdata/test.git
+	go get github.com/wadey/gocovmerge
+	gocovmerge coverage-*.out > coverage.txt && rm coverage-*.out

README.md

@@ -1,4 +1,5 @@
-# git + lab = gitlab [![Build Status](https://travis-ci.org/zaquestion/lab.svg?branch=master)](https://travis-ci.org/zaquestion/lab)  [![Join the chat at https://gitter.im/labcli](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/labcli) [![Go Report Card](https://goreportcard.com/badge/github.com/zaquestion/lab)](https://goreportcard.com/report/github.com/zaquestion/lab)
+# git + lab = gitlab [![Build Status](https://travis-ci.org/zaquestion/lab.svg?branch=master)](https://travis-ci.org/zaquestion/lab) [![codecov](https://codecov.io/gh/zaquestion/lab/branch/master/graph/badge.svg)](https://codecov.io/gh/zaquestion/lab)
+  [![Go Report Card](https://goreportcard.com/badge/github.com/zaquestion/lab)](https://goreportcard.com/report/github.com/zaquestion/lab) [![Join the chat at https://gitter.im/labcli](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/labcli)
 
 lab wraps git or [hub](https://github.com/github/hub) and adds additional features to make working with GitLab smoother