From 60469c0ef9b49953771e5aac3280a0ccf3a2dd4b Mon Sep 17 00:00:00 2001
From: Abhishek Chanda <abhishek@cloudscaling.com>
Date: Tue, 28 Apr 2015 19:02:46 -0700
Subject: [PATCH 1/3] Add a script to handle coverage

go test cannot gather coverage numbers for multiple packages
https://github.com/golang/go/issues/6909
This script wraps go test to generate report for each package
and then combine them in one file
---
 Makefile | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/Makefile b/Makefile
index 970e87da70..47ff0b32f0 100644
--- a/Makefile
+++ b/Makefile
@@ -32,9 +32,7 @@ cover:
 	@go tool cover 2>/dev/null; if [ $$? -eq 3 ]; then \
 		go get -u golang.org/x/tools/cmd/cover; \
 	fi
-	godep go test $(TEST) -coverprofile=coverage.out
-	godep go tool cover -html=coverage.out
-	rm coverage.out
+	./scripts/coverage.sh --html
 
 # vet runs the Go source code static analysis tool `vet` to find
 # any common errors.

From 313fdc227120af0759f097f8b2c4ffce7525c142 Mon Sep 17 00:00:00 2001
From: Abhishek Chanda <abhishek@cloudscaling.com>
Date: Tue, 28 Apr 2015 19:04:47 -0700
Subject: [PATCH 2/3] Ignore coverage directory

---
 .gitignore | 1 +
 1 file changed, 1 insertion(+)

diff --git a/.gitignore b/.gitignore
index 7e6e0eef97..1082145ac2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,6 +6,7 @@
 # Folders
 _obj
 _test
+.cover
 
 # Architecture specific extensions/prefixes
 *.[568vq]

From aa90d268bfaefd3d7af4f3d56f9165c04ae4e45d Mon Sep 17 00:00:00 2001
From: Abhishek Chanda <abhishek@cloudscaling.com>
Date: Tue, 28 Apr 2015 19:05:11 -0700
Subject: [PATCH 3/3] Actually add the coverage script

Shamelessly copied from
https://github.com/mlafeldt/chef-runner/blob/v0.7.0/script/coverage
---
 scripts/coverage.sh | 52 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 52 insertions(+)
 create mode 100755 scripts/coverage.sh

diff --git a/scripts/coverage.sh b/scripts/coverage.sh
new file mode 100755
index 0000000000..1d64f1fe53
--- /dev/null
+++ b/scripts/coverage.sh
@@ -0,0 +1,52 @@
+#!/bin/sh
+# Generate test coverage statistics for Go packages.
+#
+# Works around the fact that `go test -coverprofile` currently does not work
+# with multiple packages, see https://code.google.com/p/go/issues/detail?id=6909
+#
+# Usage: script/coverage [--html|--coveralls]
+#
+#     --html      Additionally create HTML report and open it in browser
+#     --coveralls Push coverage statistics to coveralls.io
+#
+
+set -e
+
+workdir=.cover
+profile="$workdir/cover.out"
+mode=count
+
+generate_cover_data() {
+    rm -rf "$workdir"
+    mkdir "$workdir"
+
+    for pkg in "$@"; do
+        f="$workdir/$(echo $pkg | tr / -).cover"
+        go test -covermode="$mode" -coverprofile="$f" "$pkg"
+    done
+
+    echo "mode: $mode" >"$profile"
+    grep -h -v "^mode:" "$workdir"/*.cover >>"$profile"
+}
+
+show_cover_report() {
+    go tool cover -${1}="$profile"
+}
+
+push_to_coveralls() {
+    echo "Pushing coverage statistics to coveralls.io"
+    goveralls -coverprofile="$profile"
+}
+
+generate_cover_data $(go list ./...)
+show_cover_report func
+case "$1" in
+"")
+    ;;
+--html)
+    show_cover_report html ;;
+--coveralls)
+    push_to_coveralls ;;
+*)
+    echo >&2 "error: invalid option: $1"; exit 1 ;;
+esac