1 // acmetag is a tool to programmatically interact with acme(1) tag
2 // bar.  It provides two flag:
3 //
4 // 	* -g prints the tag content (mnemonic: get)
5 // 	* -c clears the tag content (mnemonic: clear)
6 //
7 // Any other argument (if passed) will be appended to the tag bar.
8 //
9 // Of course, you can combine the flags:
10 //
11 // 	acmetag -g -c fmt
12 //
13 // BUG(op) it cannot change the text before the | character.
14 // AFAIK that's not possible
15 package main
16 
17 import (
18 	"flag"
19 	"fmt"
20 	"log"
21 	"os"
22 	"strconv"
23 
24 	"9fans.net/go/acme"
25 )
26 
27 var (
28 	cl = flag.Bool("c", false, `Clear the tag`)
29 	gt = flag.Bool("g", false, `Get the content of the tag`)
30 )
31 
32 func open() (*acme.Win, error) {
33 	winid := os.Getenv("winid")
34 	id, err := strconv.Atoi(winid)
35 	if err != nil {
36 		return nil, err
37 	}
38 	win, err := acme.Open(id, nil)
39 	return win, err
40 }
41 
42 func usage() {
43 	me := os.Args[0]
44 	fmt.Println(me, "- manage acme(1) tag")
45 	fmt.Println("Usage:", me, " [-cg] [entries...]")
46 	fmt.Println(" where entries are words to be added to the acme tag bar")
47 	flag.PrintDefaults()
48 	os.Exit(1)
49 }
50 
51 func main() {
52 	flag.Usage = usage
53 	flag.Parse()
54 
55 	win, err := open()
56 	if err != nil {
57 		os.Exit(1)
58 	}
59 	defer win.CloseFiles()
60 
61 	if *gt {
62 		tag, err := win.ReadAll("tag")
63 		if err != nil {
64 			log.Fatalln(err)
65 		}
66 		fmt.Println(string(tag))
67 	}
68 
69 	if *cl {
70 		win.Ctl("cleartag")
71 	}
72 
73 	sep := ""
74 	for _, arg := range flag.Args() {
75 		_, err = win.Write("tag", []byte(sep+arg))
76 		sep = " "
77 	}
78 }