try to get full coverage report on travis

gocoverage.sh

@@ -0,0 +1,29 @@
+#!/bin/bash
+# The script does automatic checking on a Go package and its sub-packages, including:
+# 6. test coverage (http://blog.golang.org/cover)
+
+set -e
+
+# Run test coverage on each subdirectories and merge the coverage profile.
+
+echo "mode: count" > profile.cov
+
+# Standard go tooling behavior is to ignore dirs with leading underscors
+for dir in $(find . -maxdepth 10 -not -path './.git*' -not -path '*/_*' -type d);
+do
+if ls $dir/*.go &> /dev/null; then
+    # echo $dir
+    go test -covermode=count -coverprofile=$dir/profile.tmp $dir
+    if [ -f $dir/profile.tmp ]
+    then
+        cat $dir/profile.tmp | tail -n +2 >> profile.cov
+        rm $dir/profile.tmp
+    fi
+fi
+done
+
+go tool cover -func profile.cov
+
+# To submit the test coverage result to coveralls.io,
+# use goveralls (https://github.com/mattn/goveralls)
+# goveralls -coverprofile=profile.cov -service=travis-ci