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// Copyright 2019 Google LLC.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package api
import (
"bytes"
"os"
"path/filepath"
"regexp"
"testing"
)
// Files in this package use a BSD-style license.
var sentinel = regexp.MustCompile(`(//|#) Copyright \d\d\d\d (Google LLC|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.
`)
const prefix = "// Copyright"
// A few files have to be skipped.
var skip = map[string]bool{
"tools.go": true, // This file requires another comment above the license.
"internal/third_party/uritemplates/uritemplates.go": true, // This file is licensed to an individual.
"internal/third_party/uritemplates/uritemplates_test.go": true, // This file is licensed to an individual.
}
// This test validates that all go files in the repo start with an appropriate license.
func TestLicense(t *testing.T) {
err := filepath.Walk(".", func(path string, fi os.FileInfo, err error) error {
if skip[path] {
return nil
}
if err != nil {
return err
}
if filepath.Ext(path) != ".go" && filepath.Ext(path) != ".sh" {
return nil
}
src, err := os.ReadFile(path)
if err != nil {
return nil
}
// Verify that the license is matched.
if !sentinel.Match(src) {
t.Errorf("%v: license header not present", path)
return nil
}
// Also check it is at the top of .go files (but not .sh files, because they must have a shebang first).
if filepath.Ext(path) == ".go" && !bytes.HasPrefix(src, []byte(prefix)) {
t.Errorf("%v: license header not at the top", path)
}
return nil
})
if err != nil {
t.Fatal(err)
}
}
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