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#!/bin/bash
log="$(portageq envvar PORTAGE_TMPDIR)/portage/*/*/temp/build.log"
cmd="${SB:-tail -f}"
c=0
die() { echo -e "$*" >&2; exit 1; }
if [[ $1 = -h || $1 = --help ]]; then
echo "Script to follow log of running portage builds"
echo
echo "Usage: ${0##*/} # see running builds"
echo " ${0##*/} N # follow build #N"
echo " ${0##*/} --fetch # follow emerge-fetch.log"
echo " ${0##*/} --help # show this help"
echo
echo "Use environment variable SB to override the default cmd ($cmd)"
elif [[ $1 = -f || $1 = --fetch ]]; then
log="$(portageq envvar EMERGE_LOG_DIR)"
log="${log:=$(portageq envvar EPREFIX)/var/log}/emerge-fetch.log"
[[ -f $log ]] || die "Could open '$log'"
exec $cmd $log
elif [[ $(echo $log) = "$log" ]]; then
echo "No running build found (try '${0##*/} --help')"
elif [[ ! $1 ]]; then
echo "Running builds - use '${0##*/} NUMBER' to select"
for i in $log; do
[[ $i =~ ^${log%%\**}([^/]*)/([^/]*)${log##*\*}$ ]] || continue
echo -e "$((++c))\t${BASH_REMATCH[2]}\t(${BASH_REMATCH[1]})"
done
else
[[ -z ${1//[0-9]} && $1 -gt 0 ]] || die "Argument should be a number greater 0"
for i in $log; do
[[ $i =~ ^${log%%\**}([^/]*)/([^/]*)${log##*\*}$ ]] || continue
[[ $((++c)) -eq $((10#$1)) ]] || continue
[[ -f ${i} ]] || die "Build number $1 was gone in the meanwhile"
echo -ne "\033]0;Viewing: ${BASH_REMATCH[2]}\t(${BASH_REMATCH[1]})\007"
exec $cmd $i
done
die "Build number $1 not found (there are only $((c--)) build(s) running)"
fi
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