github.com/rogpeppe/go-internal@v1.12.1-0.20240509064211-c8567cf8e95f/cmd/txtar-goproxy/main.go (about)

     1  // Copyright 2018 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  // The txtar-goproxy command runs a Go module proxy from a txtar module
     6  // directory (as manipulated by the txtar-addmod command).
     7  //
     8  // This allows interactive experimentation with the set of proxied modules.
     9  // For example:
    10  //
    11  //	cd cmd/go
    12  //	go test -proxy=localhost:1234 &
    13  //	export GOPROXY=http://localhost:1234/mod
    14  //
    15  // and then run go commands as usual.
    16  package main
    17  
    18  import (
    19  	"flag"
    20  	"fmt"
    21  	"log"
    22  	"os"
    23  
    24  	"github.com/rogpeppe/go-internal/goproxytest"
    25  )
    26  
    27  var proxyAddr = flag.String("addr", "", "run proxy on this network address")
    28  
    29  func usage() {
    30  	fmt.Fprintf(os.Stderr, "usage: txtar-goproxy [flags] dir\n")
    31  	flag.PrintDefaults()
    32  	os.Exit(2)
    33  }
    34  
    35  func main() {
    36  	flag.Usage = usage
    37  	flag.Parse()
    38  	if flag.NArg() != 1 {
    39  		usage()
    40  	}
    41  	srv, err := goproxytest.NewServer(flag.Arg(0), *proxyAddr)
    42  	if err != nil {
    43  		log.Fatal(err)
    44  	}
    45  	fmt.Printf("export GOPROXY=%s\n", srv.URL)
    46  	select {}
    47  }