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refactor to avoid eval and create less processes

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Gunter Labes 2024-03-23 01:37:37 +01:00
parent 0a613aac16
commit db5a934e1e
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1 changed files with 37 additions and 46 deletions
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83
utils/mp-server/tail_log_irc
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@ -1,61 +1,52 @@
#!/bin/sh
die() { echo >&2 "$@"; exit 1; }
#!/bin/bash
die() { printf '%s\n' "$*" >&2; exit 1; }
ARGS=$(getopt --options cdmlo --longoptions color,colour,dry-run,debug,logged,mod,old --name `basename $0` -- "$@")
[ $? = 0 ] || die "Syntax: $0 [-c|--color|colour] [-d|--debug|--dry-run] [-l|--logged] [-m|--mod] [-o|--old] <server version>"
set -o errexit
set -o nounset
color=
logged=
mod=
old=
file=current.log
COLOR=
EVAL=eval
LOGGED=
MOD=
OLD=
FILE=current.log
args=$(getopt --options cdmlo --longoptions color,colour,dry-run,debug,logged,mod,old --name "$(basename "$0")" -- "$@") || die "Syntax: $0 [-c|--color|colour] [-l|--logged] [-m|--mod] [-o|--old] <server version>"
eval set -- "$args"
eval set -- "$ARGS"
while true
do
case "$1" in
-c|--color|--colour)
COLOR=_color; shift ;;
-l|--logged)
LOGGED=_logged; shift ;;
-m|--mod)
MOD=_mod; shift ;;
-d|--debug|--dry-run)
EVAL=echo; shift ;;
-o|--old)
OLD=OLD:; FILE=old.log; shift ;;
--) shift; break ;;
*) echo "Unhandled option '$1'!"; shift ;;
esac
case "$1" in
-c|--color|--colour)
color=_color;;
-l|--logged)
logged=_logged;;
-m|--mod)
mod=_mod;;
-o|--old)
old=OLD: file=old.log;;
--) shift; break;;
*) printf 'Unhandled option "%s"!\n' "$1" >&2;;
esac
shift
done
[ $# -ge 1 ] || die "No server version specified!"
VERSION=$1
version=$1
# on the alternates use the trunk server as the dev server and always show logged on/off messages
case $(hostname) in gonzo.dicp.de|basilic)
LOGGED=_logged
[ $VERSION = dev ] && VERSION=trunk ;;
esac
params=(-n 0 -F)
[ "$old" ] && params=(-n 0 --pid="$(cat "$HOME/servers/$version/old.pid")" -f)
PARAMS="-n 0 -F"
[ -n "$OLD" ] && PARAMS="-n 0 --pid=\$(cat \"$HOME/servers/$VERSION/old.pid\") -f"
log="$HOME/servers/$version/$file"
#[ -r "$log" ] || die "Server log file '$log' is not readable!"
LOG="$HOME/servers/$VERSION/$FILE"
#[ -r "$LOG" ] || die "Server log file '$LOG' is not readable!"
filter=logfilter_irc$logged$color
FILTER=logfilter_irc$LOGGED$COLOR
prev=
case $version in *prev) prev=PREV: ;; esac
PREV=
case $VERSION in *prev) PREV=PREV: ;; esac
prefix=
[ "$mod" ] && prefix="$version:" && filter=logfilter_irc$mod
prefix="$prefix$prev$old"
PREFIX=
[ -n "$MOD" ] && PREFIX="$VERSION:" && FILTER=logfilter_irc$MOD
PREFIX="$PREFIX$PREV$OLD"
[ -n "$PREFIX" ] && PREFIX=" | sed --unbuffered \"s/^/$PREFIX &/\""
[ "$prefix" ] && fparams=(-e "s/^/$prefix /")
COMMAND="tail $PARAMS \"$LOG\" | \"$HOME/bin/$FILTER\" --unbuffered$PREFIX"
$EVAL $COMMAND
# keep only the pipeline around
shopt -s lastpipe
tail "${params[@]}" "$log" | exec "$filter" --unbuffered "${fparams[@]}"