1 package gzip 2 3 import ( 4 "internal/testenv" 5 "os" 6 "path/filepath" 7 "runtime" 8 "strings" 9 "testing" 10 ) 11 12 // TestGZIPFilesHaveZeroMTimes checks that every .gz file in the tree 13 // has a zero MTIME. This is a requirement for the Debian maintainers 14 // to be able to have deterministic packages. 15 // 16 // See https://golang.org/issue/14937. 17 func TestGZIPFilesHaveZeroMTimes(t *testing.T) { 18 // To avoid spurious false positives due to untracked GZIP files that 19 // may be in the user's GOROOT (Issue 18604), we only run this test on 20 // the builders, which should have a clean checkout of the tree. 21 if testenv.Builder() == "" { 22 t.Skip("skipping test on non-builder") 23 } 24 goroot, err := filepath.EvalSymlinks(runtime.GOROOT()) 25 if err != nil { 26 t.Fatal("error evaluating GOROOT: ", err) 27 } 28 var files []string 29 err = filepath.Walk(goroot, func(path string, info os.FileInfo, err error) error { 30 if err != nil { 31 return err 32 } 33 if !info.IsDir() && strings.HasSuffix(path, ".gz") { 34 files = append(files, path) 35 } 36 return nil 37 }) 38 if err != nil { 39 if os.IsNotExist(err) { 40 t.Skipf("skipping: GOROOT directory not found: %s", runtime.GOROOT()) 41 } 42 t.Fatal("error collecting list of .gz files in GOROOT: ", err) 43 } 44 if len(files) == 0 { 45 t.Fatal("expected to find some .gz files under GOROOT") 46 } 47 for _, path := range files { 48 checkZeroMTime(t, path) 49 } 50 } 51 52 func checkZeroMTime(t *testing.T, path string) { 53 f, err := os.Open(path) 54 if err != nil { 55 t.Error(err) 56 return 57 } 58 defer f.Close() 59 gz, err := NewReader(f) 60 if err != nil { 61 t.Errorf("cannot read gzip file %s: %s", path, err) 62 return 63 } 64 defer gz.Close() 65 if !gz.ModTime.IsZero() { 66 t.Errorf("gzip file %s has non-zero mtime (%s)", path, gz.ModTime) 67 } 68 } 69
