codecov.io code coverage integration (#1087)

* Minor tweaks for Travis CI configuration.

* Add codecov.io integration.

.travis.yml

@@ -1,14 +1,30 @@
+dist: trusty
 sudo: required
 
+# we don't use it, but we also do not want default (ruby) image
+language: go
+
 services:
   - docker
-install: false
 
-go:
-  - 1.8
+# skip default (go get -t -v ./...) install step
+install: true
 
 script:
-  - docker build .
+  - docker build
+      --build-arg CODECOV_TOKEN=$CODECOV_TOKEN
+      --build-arg CI=$CI
+      --build-arg TRAVIS=$TRAVIS
+      --build-arg TRAVIS_BRANCH=$TRAVIS_BRANCH
+      --build-arg TRAVIS_COMMIT=$TRAVIS_COMMIT
+      --build-arg TRAVIS_JOB_ID=$TRAVIS_JOB_ID
+      --build-arg TRAVIS_JOB_NUMBER=$TRAVIS_JOB_NUMBER
+      --build-arg TRAVIS_OS_NAME=$TRAVIS_OS_NAME
+      --build-arg TRAVIS_PULL_REQUEST=$TRAVIS_PULL_REQUEST
+      --build-arg TRAVIS_PULL_REQUEST_SHA=$TRAVIS_PULL_REQUEST_SHA
+      --build-arg TRAVIS_REPO_SLUG=$TRAVIS_REPO_SLUG
+      --build-arg TRAVIS_TAG=$TRAVIS_TAG
+      .
 
 addons:
   code_climate:

Dockerfile

@@ -1,5 +1,18 @@
 FROM gobuffalo/buffalo:development
 
+ARG CODECOV_TOKEN
+ARG CI
+ARG TRAVIS
+ARG TRAVIS_BRANCH
+ARG TRAVIS_COMMIT
+ARG TRAVIS_JOB_ID
+ARG TRAVIS_JOB_NUMBER
+ARG TRAVIS_OS_NAME
+ARG TRAVIS_PULL_REQUEST
+ARG TRAVIS_PULL_REQUEST_SHA
+ARG TRAVIS_REPO_SLUG
+ARG TRAVIS_TAG
+
 RUN buffalo version
 
 RUN go get -u github.com/alecthomas/gometalinter
@@ -30,6 +43,12 @@ RUN go get -v -t ./...
 RUN go install -v -tags sqlite ./buffalo
 
 RUN go test -tags sqlite -race ./...
+RUN go test -tags sqlite -coverprofile cover.out -covermode count ./...
+
+RUN if [ -z "$CODECOV_TOKEN"  ] ; then \
+    echo codecov not enabled ; \
+    else curl -s https://codecov.io/bash -o codecov && \
+    bash codecov -f cover.out -X fix; fi
 
 RUN gometalinter --vendor --deadline=5m ./...