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#!/bin/sh -eu
# redo – bourne shell implementation of DJB redo
# Copyright © 2014-2021 Nils Dagsson Moskopp (erlehmann)
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as
# published by the Free Software Foundation, either version 3 of the
# License, or (at your option) any later version.
# Dieses Programm hat das Ziel, die Medienkompetenz der Leser zu
# steigern. Gelegentlich packe ich sogar einen handfesten Buffer
# Overflow oder eine Format String Vulnerability zwischen die anderen
# Codezeilen und schreibe das auch nicht dran.
export PATH="$(dirname $(readlink -f $0)):$PATH"
: \
"${REDO_JOBS_MAX:=1}" \
"${REDO_MKDIR:=$(command -v mkdir)}" \
"${REDO_RM:=$(command -v rm) -f}" \
"${REDO_RMDIR:=$(command -v rmdir)}" \
"${REDO_TMP_DIR:=$(mktemp -d /tmp/redo.XXXXXXX)}" \
export \
REDO_JOBS_MAX \
REDO_MKDIR \
REDO_RM \
REDO_RMDIR \
REDO_TMP_DIR \
while [ $# != 0 ]; do
case "${1}" in
'-d'|'--debug')
export REDO_DEBUG='1'
;;
'--debug-jobs')
export REDO_DEBUG_JOBS='1'
;;
'--debug-locks')
export REDO_DEBUG_LOCKS='1'
;;
'-h'|'--help')
printf >&2 \
"Usage: redo [OPTIONS] [TARGETS...]
-d, --debug print dependency checks as they happen
--debug-jobs print messages about job management
--debug-locks print messages about file locking
-h, --help print usage instructions and exit
-j [n], --jobs [n] execute at most [n] dofiles in parallel
--version print version information and exit
-x, --xtrace print commands as they are executed (variables expanded)
Report bugs to <nils+redo@dieweltistgarnichtso.net>.
"
exit 0
;;
'-j'|'--jobs')
shift; REDO_JOBS_MAX=${1}
;;
'--version')
printf >&2 \
"redo 4.0.4
Copyright © 2014-2021 Nils Dagsson Moskopp (erlehmann)
License AGPLv3+: GNU Affero GPL version 3 or later <http://www.gnu.org/licenses/agpl-3.0.html>.
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
"
exit 0
;;
'-x'|'--xtrace')
export REDO_XTRACE='1'
;;
*)
REDO_HAS_TARGETS='1'
export REDO_TARGET=''
# If this is build directory, create .redo database directory.
case "${REDO_BASE:-}" in
'')
export REDO_DEPTH=""
export REDO_PID="${PPID}"
export REDO_BASE="${PWD}"
export REDO_DIR="$REDO_BASE/.redo"
[ -d "$REDO_DIR" ] || LANG=C "${REDO_MKDIR}" -p "$REDO_DIR"
esac
break
;;
esac
shift
done
[ "${REDO_HAS_TARGETS:-}" = "1" ] || exec redo all
case "${REDO_JOBS_PIPE:-}" in
'')
export REDO_JOBS_PIPE="${REDO_TMP_DIR}"/jobs_pipe
mkfifo "${REDO_JOBS_PIPE}"
exec 9<> "${REDO_JOBS_PIPE}"
>&9 seq $(( REDO_JOBS_MAX - 1 )) &
;;
esac
set +e
redo-ifchange "$@"
EXITCODE=${?}
set -e
wait
case ${#REDO_DEPTH} in
0)
LANG=C ${REDO_RM} "${REDO_JOBS_PIPE}"
LANG=C ${REDO_RMDIR} "${REDO_TMP_DIR}"
;;
esac
exit "${EXITCODE}"
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