// Copyright 2015 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.

// Editinacme can be used as $EDITOR in a Unix environment.
//
// Usage:
//
//	editinacme <file>
//
// Editinacme uses the plumber to ask acme to open the file,
// waits until the file's acme window is deleted, and exits.

package main

import (
	"flag"
	"fmt"
	"log"
	"os"
	"os/exec"
	"path/filepath"

	"9fans.net/go/acme"
)

func main() {
	log.SetFlags(0)
	log.SetPrefix("editinacme: ")
	flag.Usage = func() {
		fmt.Fprintf(os.Stderr, "usage: editinacme file\n")
		os.Exit(2)
	}
	flag.Parse()
	if flag.NArg() != 1 {
		flag.Usage()
	}

	file := flag.Arg(0)

	fullpath, err := filepath.Abs(file)
	if err != nil {
		log.Fatal(err)
	}
	file = fullpath

	r, err := acme.Log()
	if err != nil {
		log.Fatal(err)
	}

	log.Printf("editing %s", file)

	out, err := exec.Command("plumb", "-d", "edit", file).CombinedOutput()
	if err != nil {
		log.Fatalf("executing plumb: %v\n%s", err, out)
	}

	for {
		ev, err := r.Read()
		if err != nil {
			log.Fatalf("reading acme log: %v", err)
		}
		if ev.Op == "del" && ev.Name == file {
			break
		}
	}
}