runtime: Simplify package listing in go-test.sh

go-test.sh defaults to testing all the packages listed by go list, except
for a number filtered out.  It turns out that none of those filters are
necessary any more:
  * We've long required a Go newer than 1.9 which means the vendor filter
    isn't needed
  * The agent filter doesn't do anything now that we've moved to the Kata
    2.x unified repo
  * The tests filters don't hit anything on the list of modules in
    src/runtime (which is the only user of the script)

But since we don't need to filter anything out any more, we don't even need
to iterate through a list ourselves.  We can simply pass "./..." directly
to go test and it will iterate through all the sub-packages itself.

Interestingly this more than doubles the speed of "make test" for me - I
suspect because go test's internal paralellism works better over a larger
pool of tests.

This also lets us remove handling of non-existent coverage files from
test_go_package(), since with default options we will no longer test packages without tests
by default.  If the user explicitly requests testing of a package with no
tests, then failing makes sense.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>

src/runtime/go-test.sh

@@ -12,7 +12,6 @@ typeset -A long_options
 
 long_options=(
 	[help]="Show usage"
-	[list]="List available packages"
 	[package:]="Specify test package to run"
 )
 
@@ -25,23 +24,12 @@ timeout_value=${KATA_GO_TEST_TIMEOUT:-30s}
 # -race flag is not supported on s390x
 [ "$(go env GOARCH)" != "s390x" ] && race="-race"
 
-# Notes:
-#
-# - The vendor filtering is required for versions of go older than 1.9.
-# - The test package filtering is required since those packages need special setup.
-all_test_packages=$(go list ./... 2>/dev/null |\
-	grep -v "/vendor/" |\
-	grep -v "github.com/kata-containers/agent/protocols/grpc" |\
-	grep -v "github.com/kata-containers/tests/functional" |\
-	grep -v "github.com/kata-containers/tests/integration/docker" \
-	|| true)
-
 # The "master" coverage file that contains the coverage results for
 # all packages run under all scenarios.
 test_coverage_file="coverage.txt"
 
-# Temporary coverage file created for a single package. The results in this
+# Temporary coverage file created for a "go test" run. The results in
-# file will be added to the master coverage file.
+# this file will be added to the master coverage file.
 tmp_coverage_file="${test_coverage_file}.tmp"
 
 warn()
@@ -90,11 +78,6 @@ Commands:
 EOF
 }
 
-list_packages()
-{
-	echo "$all_test_packages"
-}
-
 # Run a command as either root or the current user (which might still be root).
 #
 # If the first argument is "root", run using sudo, else run as the current
@@ -126,15 +109,9 @@ test_go_package()
 
 	run_as_user "$user" go test "$go_test_flags" -covermode=atomic -coverprofile=$tmp_coverage_file "$pkg"
 
-	# Check for the temporary coverage file since if will
+	# Merge test results into the master coverage file.
-	# not be generated unless a package actually contains
+	run_as_user "$user" tail -n +2 "$tmp_coverage_file" >> "$test_coverage_file"
-	# tests.
+	rm -f "$tmp_coverage_file"
-	if [ -f "${tmp_coverage_file}" ]; then
-		# Save these package test results into the
-		# master coverage file.
-		run_as_user "$user" tail -n +2 "$tmp_coverage_file" >> "$test_coverage_file"
-		rm -f "$tmp_coverage_file"
-	fi
 }
 
 # Run all tests and generate a test coverage file.
@@ -161,19 +138,15 @@ test_coverage()
 	fi
 
 	echo "INFO: Currently running as user '$(id -un)'"
-	for pkg in $test_packages; do
+	for user in $users; do
-		for user in $users; do
+	    test_go_package "$package" "$user"
-			test_go_package "$pkg" "$user"
-		done
 	done
 }
 
 # Run the tests locally
 test_local()
 {
-	for pkg in $test_packages; do
+	eval go test "$go_test_flags" "$package"
-		eval go test "$go_test_flags" "$pkg"
-	done
 }
 
 main()
@@ -187,7 +160,7 @@ main()
 		--longoptions="$long_option_names" \
 		-- "$@")
 
-	local package
+	package="./..."
 
 	eval set -- "$args"
 	[ $? -ne 0 ] && { usage >&2; exit 1; }
@@ -196,7 +169,6 @@ main()
 	do
 		case "$1" in
 			-h|--help) usage; exit 0 ;;
-			--list) list_packages; exit 0 ;;
 			--package) package="$2"; shift 2;;
 			--) shift; break ;;
 		esac
@@ -204,12 +176,6 @@ main()
 		shift
 	done
 
-	if [ -n "$package" ]; then
-		test_packages="$package"
-	else
-		test_packages="$all_test_packages"
-	fi
-
 	# Consume getopt cruft
 	[ "$1" = "--" ] && shift
 
@@ -220,8 +186,6 @@ main()
 		run_coverage=yes
 	fi
 
-	[ -z "$test_packages" ] && echo "INFO: no golang code to test" && exit 0
-
 	local go_ldflags
 	[ "$(go env GOARCH)" = s390x ] && go_ldflags="-extldflags -Wl,--s390-pgste"