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[etc/mutt.git] / .mutt / edit-header
1 #!/bin/sh
2 #
3 # edit-header - helper script to append/replace/remove headers with mutt
4 #
5 # Based on an idea by David Champion <dgc at uchicago.edu>
6 #
7 # Copyright © 2008 martin f. krafft <madduck@madduck.net>
8 # Released under the terms of the Artistic Licence 2.0
9 #
10 set -eu
11
12 if [ ! -x "$(command -v formail)" ]; then
13   echo E: formail not installed. >&2
14   exit 1
15 fi
16
17 header="${1:-}"
18 if [ -z "$header" ]; then
19   echo "E: no header specified" >&2
20   exit 1
21 fi
22
23 get_header_contents()
24 {
25   local contents
26   printf "Enter ${1:-header} contents: " >/dev/tty
27   read contents </dev/tty
28   echo "$contents"
29 }
30
31 script="${0%/*}/${2:-}"
32 if [ -f "$script" ] && [ -x "$script" ]; then
33   if [ -z "${__RLWRAPPED:-}" ] && [ -x $(command -v rlwrap) ]; then
34     __RLWRAPPED=true exec rlwrap "$0" "$@"
35   fi
36
37   contents_source="$script"
38   shift
39 else
40   contents_source=get_header_contents
41 fi
42
43 editor=
44 case "$0" in
45   *append-header|*supersede-header|*replace-header)
46     contents="${2:-}"
47     [ -n "$contents" ] || contents="$(eval $contents_source $header)"
48     case "$0" in
49       *append-header) flag=-A;;
50       *supersede-header) flag=-i;;
51       *replace-header) flag=-I;;
52     esac
53     editor="${0%/*}/filter-proxy formail $flag \'$header: $contents\'"
54     ;;
55
56   *remove-header)
57     editor="${0%/*}/filter-proxy formail -I \'$header:\'"
58     ;;
59
60   *)
61     echo "E: unknown invocation: ${0##*/}" >&2
62     exit 1
63     ;;
64
65 esac
66
67 echo "set my_editor=\"\$editor\""
68 echo "set my_filter=\"$editor\""
69 echo -n "push '"
70 echo -n "<enter-command>set editor=\"\$my_filter\"<enter>"
71 echo -n "<edit>"
72 echo -n "<enter-command>set editor=\"\$my_editor\"<enter>"
73 echo -n "<enter-command>unset my_filter<enter>"
74 echo -n "<enter-command>unset my_editor<enter>"
75 echo "'"