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// Copyright 2018 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.
// +build ignore
// Interactive debugging shell for codehost.Repo implementations.
package main
import (
"archive/zip"
"bufio"
"bytes"
"flag"
"fmt"
"io"
"io/ioutil"
"log"
"os"
"strings"
"time"
"cmd/go/internal/cfg"
"cmd/go/internal/modfetch/codehost"
)
func usage() {
fmt.Fprintf(os.Stderr, "usage: go run shell.go vcs remote\n")
os.Exit(2)
}
func main() {
cfg.GOMODCACHE = "/tmp/vcswork"
log.SetFlags(0)
log.SetPrefix("shell: ")
flag.Usage = usage
flag.Parse()
if flag.NArg() != 2 {
usage()
}
repo, err := codehost.NewRepo(flag.Arg(0), flag.Arg(1))
if err != nil {
log.Fatal(err)
}
b := bufio.NewReader(os.Stdin)
for {
fmt.Fprintf(os.Stderr, ">>> ")
line, err := b.ReadString('\n')
if err != nil {
log.Fatal(err)
}
f := strings.Fields(line)
if len(f) == 0 {
continue
}
switch f[0] {
default:
fmt.Fprintf(os.Stderr, "?unknown command\n")
continue
case "tags":
prefix := ""
if len(f) == 2 {
prefix = f[1]
}
if len(f) > 2 {
fmt.Fprintf(os.Stderr, "?usage: tags [prefix]\n")
continue
}
tags, err := repo.Tags(prefix)
if err != nil {
fmt.Fprintf(os.Stderr, "?%s\n", err)
continue
}
for _, tag := range tags {
fmt.Printf("%s\n", tag)
}
case "stat":
if len(f) != 2 {
fmt.Fprintf(os.Stderr, "?usage: stat rev\n")
continue
}
info, err := repo.Stat(f[1])
if err != nil {
fmt.Fprintf(os.Stderr, "?%s\n", err)
continue
}
fmt.Printf("name=%s short=%s version=%s time=%s\n", info.Name, info.Short, info.Version, info.Time.UTC().Format(time.RFC3339))
case "read":
if len(f) != 3 {
fmt.Fprintf(os.Stderr, "?usage: read rev file\n")
continue
}
data, err := repo.ReadFile(f[1], f[2], 10<<20)
if err != nil {
fmt.Fprintf(os.Stderr, "?%s\n", err)
continue
}
os.Stdout.Write(data)
case "zip":
if len(f) != 4 {
fmt.Fprintf(os.Stderr, "?usage: zip rev subdir output\n")
continue
}
subdir := f[2]
if subdir == "-" {
subdir = ""
}
rc, err := repo.ReadZip(f[1], subdir, 10<<20)
if err != nil {
fmt.Fprintf(os.Stderr, "?%s\n", err)
continue
}
data, err := io.ReadAll(rc)
rc.Close()
if err != nil {
fmt.Fprintf(os.Stderr, "?%s\n", err)
continue
}
if f[3] != "-" {
if err := ioutil.WriteFile(f[3], data, 0666); err != nil {
fmt.Fprintf(os.Stderr, "?%s\n", err)
continue
}
}
z, err := zip.NewReader(bytes.NewReader(data), int64(len(data)))
if err != nil {
fmt.Fprintf(os.Stderr, "?%s\n", err)
continue
}
for _, f := range z.File {
fmt.Printf("%s %d\n", f.Name, f.UncompressedSize64)
}
}
}
}
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