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// Copyright 2016 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.
package gzip
import (
"internal/testenv"
"io/fs"
"os"
"path/filepath"
"runtime"
"strings"
"testing"
)
// TestGZIPFilesHaveZeroMTimes checks that every .gz file in the tree
// has a zero MTIME. This is a requirement for the Debian maintainers
// to be able to have deterministic packages.
//
// See https://golang.org/issue/14937.
func TestGZIPFilesHaveZeroMTimes(t *testing.T) {
// To avoid spurious false positives due to untracked GZIP files that
// may be in the user's GOROOT (Issue 18604), we only run this test on
// the builders, which should have a clean checkout of the tree.
if testenv.Builder() == "" {
t.Skip("skipping test on non-builder")
}
if !testenv.HasSrc() {
t.Skip("skipping; no GOROOT available")
}
goroot, err := filepath.EvalSymlinks(runtime.GOROOT())
if err != nil {
t.Fatal("error evaluating GOROOT: ", err)
}
var files []string
err = filepath.WalkDir(goroot, func(path string, info fs.DirEntry, err error) error {
if err != nil {
return err
}
if !info.IsDir() && strings.HasSuffix(path, ".gz") {
files = append(files, path)
}
return nil
})
if err != nil {
if os.IsNotExist(err) {
t.Skipf("skipping: GOROOT directory not found: %s", runtime.GOROOT())
}
t.Fatal("error collecting list of .gz files in GOROOT: ", err)
}
if len(files) == 0 {
t.Fatal("expected to find some .gz files under GOROOT")
}
for _, path := range files {
checkZeroMTime(t, path)
}
}
func checkZeroMTime(t *testing.T, path string) {
f, err := os.Open(path)
if err != nil {
t.Error(err)
return
}
defer f.Close()
gz, err := NewReader(f)
if err != nil {
t.Errorf("cannot read gzip file %s: %s", path, err)
return
}
defer gz.Close()
if !gz.ModTime.IsZero() {
t.Errorf("gzip file %s has non-zero mtime (%s)", path, gz.ModTime)
}
}