move coverage generation into a separate script

.travis.yml

@@ -13,10 +13,5 @@ before_install:
   - if ! go get code.google.com/p/go.tools/cmd/cover; then go get golang.org/x/tools/cmd/cover; fi
 
 script:
-  - echo -e "mode: count" > coverage.out
-  - go test -v -covermode=count -coverprofile=magic_packet.out
-  - go test -v ./cmd/wol -covermode=count -coverprofile=wol.out
-  - cat magic_packet.out | tail -n +2 >> coverage.out
-  - cat wol.out | tail -n +2 >> coverage.out
-  - rm magic_packet.out wol.out
+  - ./run_tests.sh
   - goveralls -coverprofile=coverage.out -service travis-ci -repotoken $COVERALLS_TOKEN

run_tests.sh

@@ -0,0 +1,16 @@
+#!/bin/bash
+
+# This is a simple script to run our tests and accumulate the
+# resulting coverage report into a single coverage.out file
+
+fail=0
+
+echo "mode: set" > coverage.out
+
+go test -v . -covermode=count -coverprofile=magic_packet.out || fail=1
+cat magic_packet.out | tail -n +2 >> coverage.out
+rm magic_packet.out
+
+go test -v ./cmd/wol -covermode=count -coverprofile=wol.out || fail=1
+cat wol.out | tail -n +2 >> coverage.out
+rm wol.out