Run coverage analysis in separate step, and save results

Remove CircleCI 1.0 implementation which used scp to contact other
lanes.

Note we can't use an env var in store_artifacts clause

.circleci/config.yml

@@ -1,7 +1,7 @@
 version: 2
 defaults: &defaults
   docker:
-    - image: weaveworks/weavebuild:circle20-50a4e941
+    - image: weaveworks/weavebuild:circle20-2e6504d3
   working_directory: /go/src/github.com/weaveworks/weave
 
 jobs:
@@ -18,6 +18,10 @@ jobs:
     steps:
       - checkout
       - run: COVERDIR=test/coverage make BUILD_IN_CONTAINER=false tests
+      - persist_to_workspace:
+          root: .
+          paths:
+          - test/coverage
 
   build:
     <<: *defaults
@@ -62,11 +66,25 @@ jobs:
       - run:
           command: bin/circle-destroy-vms
           background: true
-      - deploy:
-          command: cd $SRCDIR/test; ./gen_coverage_reports.sh
-      # run goveralls; copy coverage reports to artifacts dir
-      - deploy:
-          command: $SRCDIR/bin/circle-teardown-pre
+      - persist_to_workspace:
+          root: .
+          paths:
+          - test/coverage
+      - store_artifacts:
+          path: /tmp/artifacts
+
+  gen-coverage:
+    <<: *defaults
+    environment:
+      CIRCLE_ARTIFACTS: /tmp/artifacts
+    steps:
+      - checkout
+      - run: mkdir $CIRCLE_ARTIFACTS
+      - attach_workspace:
+          at: .
+      - run: cd test; ./gen_coverage_reports.sh
+      - run: goveralls -repotoken $COVERALLS_REPO_TOKEN -coverprofile=test/profile.cov -service=circleci
+      - run: cp test/coverage.* $CIRCLE_ARTIFACTS
       - store_artifacts:
           path: /tmp/artifacts
 
@@ -89,6 +107,10 @@ workflows:
             - lint
             - unit-test
             - build
+      - gen-coverage:
+          requires:
+            - unit-test
+            - smoke-tests
       - deploy:
           requires:
             - smoke-tests

.lintignore

@@ -4,7 +4,6 @@
 # avoid breaking the build on make lint:
 bin/circle-deploy-issues
 bin/circle-deploy-master
-bin/circle-teardown-pre
 bin/circle-test-teardown
 bin/circle-test-unit
 bin/install-wordepress

test/gen_coverage_reports.sh

@@ -3,13 +3,8 @@
 set -ex
 DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 
-if [ -n "$CIRCLECI" ]; then
-    for i in $(seq 1 $(($CIRCLE_NODE_TOTAL - 1))); do
-        scp node$i:/home/ubuntu/src/github.com/weaveworks/weave/test/coverage/* ./coverage/ || true
-    done
-fi
+# 'cover' tool is from github.com/weaveworks/build-tools/cover
 
-go get github.com/weaveworks/build-tools/cover
 cover ./coverage/* >profile.cov
 go tool cover -html=profile.cov -o coverage.html
 go tool cover -func=profile.cov -o coverage.txt