1 files changed, 26 insertions, 0 deletions
diff --git a/src/cmd/compile/internal/ssa/gen/cover.bash b/src/cmd/compile/internal/ssa/gen/cover.bash
new file mode 100755
index 0000000..6c860fc
--- /dev/null
+++ b/src/cmd/compile/internal/ssa/gen/cover.bash
@@ -0,0 +1,26 @@
+#!/usr/bin/env bash 
+# Copyright 2020 The Go Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style
+# license that can be found in the LICENSE file.
+
+# A quick and dirty way to obtain code coverage from rulegen's main func. For
+# example:
+#
+#     ./cover.bash && go tool cover -html=cover.out
+#
+# This script is needed to set up a temporary test file, so that we don't break
+# regular 'go run *.go' usage to run the generator.
+
+cat >main_test.go <<-EOF
+	// +build ignore
+
+	package main
+
+	import "testing"
+
+	func TestCoverage(t *testing.T) { main() }
+EOF
+
+go test -run='^TestCoverage$' -coverprofile=cover.out "$@" *.go
+
+rm -f main_test.go