Exclude code templates from the standard build process

instrumenter.go

@@ -529,6 +529,7 @@ var noTestMainTemplate string
 func (i *instrumenter) writeGobcoFiles(tmpDir string, pkgs []*ast.Package) {
 	pkgname := pkgs[0].Name
 	fixPkgname := func(str string) string {
+		str = strings.TrimPrefix(str, "//go:build ignore\n// +build ignore\n\n")
 		return strings.Replace(str, "package main\n", "package "+pkgname+"\n", 1)
 	}
 	i.writeFile(filepath.Join(tmpDir, "gobco_fixed.go"), fixPkgname(fixedTemplate))

templates/gobco_fixed.go

@@ -1,3 +1,6 @@
+//go:build ignore
+// +build ignore
+
 // This is the fixed part of the gobco code that is injected into the
 // package being checked.
 

templates/gobco_no_testmain_test.go

@@ -1,3 +1,6 @@
+//go:build ignore
+// +build ignore
+
 package main
 
 // This file is used if the code to be instrumented does not define its own

templates/gobco_variable.go

@@ -1,3 +1,6 @@
+//go:build ignore
+// +build ignore
+
 // This is the variable part of the gobco code that is injected into the
 // package being checked.
 //

test.sh

@@ -1,10 +1,7 @@
 #! /bin/sh
 set -eu
 
-# Don't test the subpackages with './...' since the templates in ./templates
-# are not meaningfully testable on their own.
-
-go test -coverprofile=coverage.txt -covermode=count .
+go test -coverprofile=coverage.txt -covermode=count ./...
 go test ./testdata/instrumenter
 
 go install