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bgrun: notify about output during cleanup
[etc/mutt.git] / .mutt / bgrun
1 #!/bin/sh
2
3 SELF="${0##*/}"
4
5 if [ -z "$TMPDIR" ]; then
6   TMPDIR=/tmp
7 elif [ -d "${TMPDIR}/volatile" ]; then
8   TMPDIR="${TMPDIR}/volatile"
9 fi
10 export TMPDIR
11 TMPDIR=$(mktemp -dp "$TMPDIR" mutt.XXXXXXXXXX)
12 cleanup() { cd / && notify_output && rm -rf "$TMPDIR"; }
13 trap cleanup 1 2 3 4 5 6 7 8 10 11 12 13 14 15
14
15 cd "$TMPDIR"
16
17 notify() {
18   if [ -x "$(command -v awesome-client)" ]; then
19     awesome-client <<-_eof
20         local naughty = require("naughty")
21         naughty.notify({ preset = naughty.config.presets.low,
22                 title  = "$3",
23                 text   = [[stdout:
24                 $(sed -e 's,\",\\\",g' "$1")
25                 stderr:
26                 $(sed -e 's,\",\\\",g' "$2")]]
27                 })
28         _eof
29   fi
30 }
31
32 notify_output() {
33   if [ -s "$TMPDIR/output.stdout" ] || [ -s "$TMPDIR/output.stderr" ]; then
34     notify $TMPDIR/output.stdout $TMPDIR/output.stderr \
35       "Output from mutt/$SELF on $BASENAME"
36   fi
37 }
38
39 guess_extension() {
40   python -c "import mimetypes; print(mimetypes.guess_extension('$1'))"
41 }
42
43 launch_viewer() {
44   run-mailcap --action=view "$1":"$2" > output.stdout 2> output.stderr
45 }
46
47 MIMETYPE="$1"; shift
48
49 get_file() {
50   local t
51   if [ -z "$1" ]; then
52     t=$(tempfile -d . -p mutt -s $(guess_extension "$MIMETYPE"))
53     cat > "$t"
54     echo "$t"
55   else
56     t="$(echo ${1##*/} | sed -re 's![^[:alnum:],.@%^+=_-]!_!gi')"
57     cp "$1" "$t"
58     echo "$t"
59   fi
60 }
61
62 case "$SELF" in
63   (bgrun)
64     # make a copy of the file, then launch a shell process in the background
65     # to divert to run-mailcap, after which the temporary directory gets
66     # cleaned up.
67     FILE="$(get_file "${1:-}")"
68     (
69       launch_viewer "$MIMETYPE" "$FILE"
70       sleep 1
71       cleanup
72     ) &
73     trap - 1 2 3 4 5 6 7 8 10 11 12 13 14 15
74     ;;
75   (bgrun-fifo)
76     # hack to stay around until the viewer has read the file: make a fifo and
77     # wait for the cat process to finish writing to it, which means that it
78     # must have been consumed on the other end.
79     FILE="$(get_file "${1:-}")"
80     FIFO="${FILE%/*}/fifo-${FILE##*/}"
81     mkfifo "$FIFO"
82     cat "$FILE" > "$FIFO" &
83     # For some reason, we do have to write a tempfile and cannot seem to
84     # redirect stdin directly to the fifo, i.e. this does not work instead of
85     # the previous three lines:
86     ## cat > "$FIFO" &
87     launch_viewer "$MIMETYPE" "${FIFO}"
88     wait
89     cleanup
90     ;;
91   (bgrun-delay)
92     # hack to stay around for a fixed period of time after the viewer process
93     # returns control to the caller, so that we can clean up. This is for
94     # cases when the FIFO method doesn't work, because e.g. Firefox randomly
95     # chooses it needs to read HTML files twice.
96     FILE="$(get_file "${1:-}")"
97     (launch_viewer "$MIMETYPE" "${FILE}") &
98     (
99       sleep 1m
100       echo Cleaning up $TMPDIR… > $TMPDIR/output.stderr
101       cleanup
102     ) &
103     ;;
104 esac