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more robust retraining with resubmission
[etc/mailfilter.git] / bin / retrain
1 #!/bin/sh
2 set -eu
3
4 NICE='/usr/bin/nice -20'
5 NICE=''
6
7 RESUBMIT="$NICE $HOME/.etc/mailfilter/bin/resubmit"
8
9 PAUSETIME=10
10
11 HAM=0
12 SPAM=0
13 MAILDIR=
14
15 for i in "$@"; do
16   case "$i" in
17     --ham) HAM=1;;
18     --spam) SPAM=1;;
19     *)
20       if [ -n "$MAILDIR" ]; then
21         echo "E: Maildir already specified: $i" >&2
22         exit 1
23       elif [ -d "$i"/cur ] && [ -d "$i"/new ] && [ -d "$i"/tmp ]; then
24         MAILDIR="$i"
25       else
26         echo "E: unknown argument: $i" >&2
27         exit 255
28       fi
29       ;;
30   esac
31 done
32
33 ARG=
34 case "$HAM/$SPAM" in
35   0/0)
36     echo "E: you need to specify either --ham or --spam." >&2
37     exit 255
38     ;;
39   1/1)
40     echo "E: you cannot specify both --ham and --spam." >&2
41     exit 255
42     ;;
43   0/1) ARG=--spam;;
44   1/0) ARG=--ham;;
45 esac
46
47 LOCKFILE="$MAILDIR/.retrain.lock"
48 trap "rm -f $LOCKFILE" 1 2 3 4 5 6 7 8 10 11 12 13 14 15
49 if ! lockfile -0 -r0 -l 3600 "$LOCKFILE" 2>/dev/null; then
50   echo "E: another retrain process is already running over that Maildir." >&2
51   exit 1
52 fi
53
54 find $MAILDIR/cur $MAILDIR/new -type f | while read msg; do
55   $NICE ${0%/*}/train $ARG "$msg" | $RESUBMIT || ret=$?
56   case "${ret:-0}" in
57     0|75) :;;
58     *)
59       echo "E: resubmission returned with exit code $ret" >&2
60       continue
61       ;;
62   esac
63   rm -f "$msg"
64   sleep $PAUSETIME
65 done
66
67 rm -f "$LOCKFILE"
68 trap - 1 2 3 4 5 6 7 8 10 11 12 13 14 15
69
70 exit 0