mirror of
https://github.com/golang/go
synced 2024-11-05 18:46:11 -07:00
95 lines
2.1 KiB
Go
95 lines
2.1 KiB
Go
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// Copyright 2022 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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//go:build ignore
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// Mkzip writes a zoneinfo.zip with the content of the current directory
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// and its subdirectories, with no compression, suitable for package time.
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//
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// Usage:
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//
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// go run ../../mkzip.go ../../zoneinfo.zip
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//
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// We use this program instead of 'zip -0 -r ../../zoneinfo.zip *' to get
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// a reproducible generator that does not depend on which version of the
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// external zip tool is used or the ordering of file names in a directory
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// or the current time.
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package main
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import (
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"archive/zip"
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"bytes"
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"flag"
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"fmt"
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"hash/crc32"
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"io/fs"
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"log"
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"os"
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"path/filepath"
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"strings"
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)
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func usage() {
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fmt.Fprintf(os.Stderr, "usage: go run mkzip.go ../../zoneinfo.zip\n")
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os.Exit(2)
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}
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func main() {
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log.SetPrefix("mkzip: ")
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log.SetFlags(0)
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flag.Usage = usage
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flag.Parse()
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args := flag.Args()
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if len(args) != 1 || !strings.HasSuffix(args[0], ".zip") {
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usage()
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}
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var zb bytes.Buffer
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zw := zip.NewWriter(&zb)
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seen := make(map[string]bool)
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err := filepath.WalkDir(".", func(path string, d fs.DirEntry, err error) error {
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if d.IsDir() {
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return nil
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}
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data, err := os.ReadFile(path)
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if err != nil {
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log.Fatal(err)
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}
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if strings.HasSuffix(path, ".zip") {
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log.Fatalf("unexpected file during walk: %s", path)
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}
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name := filepath.ToSlash(path)
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w, err := zw.CreateRaw(&zip.FileHeader{
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Name: name,
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Method: zip.Store,
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CompressedSize64: uint64(len(data)),
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UncompressedSize64: uint64(len(data)),
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CRC32: crc32.ChecksumIEEE(data),
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})
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if err != nil {
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log.Fatal(err)
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}
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if _, err := w.Write(data); err != nil {
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log.Fatal(err)
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}
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seen[name] = true
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return nil
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})
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if err != nil {
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log.Fatal(err)
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}
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if err := zw.Close(); err != nil {
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log.Fatal(err)
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}
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if len(seen) == 0 {
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log.Fatalf("did not find any files to add")
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}
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if !seen["US/Eastern"] {
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log.Fatalf("did not find US/Eastern to add")
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}
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if err := os.WriteFile(args[0], zb.Bytes(), 0666); err != nil {
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log.Fatal(err)
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}
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}
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