How to get all packages' code coverage together in Go?

Question

I have a library consisting of several packages. When running tests, I am using '-cover' flag and its showing the coverage information for each package individually.Like follows:

--- PASS: TestSampleTestSuite (0.00s) PASS coverage: 28.7% of statements ok      github.com/path/to/package1 13.021s ?       github.com/path/to/package2 [no test files]  === RUN   TestAbc --- PASS: TestAbc (0.43s) PASS coverage: 27.7% of statements 

Is there any way to get a full coverage overview easily to get good idea about coverage on the whole project?

Update: Here is the go test command I am using

go test ./... -v -short -p 1 -cover 

Answer 1

EDIT: Things have changed since I wrote this answer. See the release notes of Go 1.10: https://golang.org/doc/go1.10#test :

The go test -coverpkg flag now interprets its argument as a comma-separated list of patterns to match against the dependencies of each test, not as a list of packages to load anew. For example, go test -coverpkg=all is now a meaningful way to run a test with coverage enabled for the test package and all its dependencies. Also, the go test -coverprofile option is now supported when running multiple tests.

You can now run

go test -v -coverpkg=./... -coverprofile=profile.cov ./... go tool cover -func profile.cov 

---

Old answer

Here is a bash script extracted from https://github.com/h12w/gosweep :

#!/bin/bash set -e  echo 'mode: count' > profile.cov  for dir in $(find . -maxdepth 10 -not -path './.git*' -not -path '*/_*' -type d); do if ls $dir/*.go &> /dev/null; then     go test -short -covermode=count -coverprofile=$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