Enables cross-package code coverage reporting

Signed-off-by: Brian Bland <brian.bland@docker.com>

circle.yml

@@ -48,9 +48,6 @@ dependencies:
       gvm use stable &&
       go get github.com/axw/gocov/gocov github.com/golang/lint/golint
 
-  # Disabling goveralls for now
-  # go get github.com/axw/gocov/gocov github.com/mattn/goveralls github.com/golang/lint/golint
-
 test:
   pre:
   # Output the go versions we are going to test
@@ -75,25 +72,17 @@ test:
         pwd: $BASE_STABLE
 
   override:
-
   # Test stable, and report
-  # Preset the goverall report file
-  # - echo "$CIRCLE_PAIN" > ~/goverage.report
-
-     - gvm use stable; go list ./... | xargs -L 1 -I{} rm -f $GOPATH/src/{}/coverage.out:
-         pwd: $BASE_STABLE
-
-     - gvm use stable; go list -tags "$DOCKER_BUILDTAGS" ./... | xargs -L 1 -I{} godep go test -tags "$DOCKER_BUILDTAGS" -test.short -coverprofile=$GOPATH/src/{}/coverage.out -covermode=count {}:
+     - gvm use stable; export ROOT_PACKAGE=$(go list .); go list -tags "$DOCKER_BUILDTAGS" ./... | xargs -L 1 -I{} bash -c 'export PACKAGE={}; godep go test -tags "$DOCKER_BUILDTAGS" -test.short -coverprofile=$GOPATH/src/$PACKAGE/coverage.out -coverpkg=$(./coverpkg.sh $PACKAGE $ROOT_PACKAGE) $PACKAGE':
          timeout: 600
          pwd: $BASE_STABLE
 
   post:
-  # Aggregate and report to coveralls
+  # Report to codecov
     - bash <(curl -s https://codecov.io/bash):
         pwd: $BASE_STABLE
 
   ## Notes
-  # Disabled coveralls reporting: build breaking sending coverage data to coveralls
   # Disabled the -race detector due to massive memory usage.
   # Do we want these as well?
   # - go get code.google.com/p/go.tools/cmd/goimports

coverpkg.sh

@@ -0,0 +1,7 @@
+#!/usr/bin/env bash
+# Given a subpackage and the containing package, figures out which packages
+# need to be passed to `go test -coverpkg`:  this includes all of the
+# subpackage's dependencies within the containing package, as well as the
+# subpackage itself.
+DEPENDENCIES="$(go list -f $'{{range $f := .Deps}}{{$f}}\n{{end}}' ${1} | grep ${2})"
+echo "${1} ${DEPENDENCIES}" | xargs echo -n | tr ' ' ','