strace/maint/gen-contributors-list.sh

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#!/bin/sh -efu
# Copyright (c) 2017 Dmitry V. Levin <ldv@altlinux.org>
# Copyright (c) 2017-2018 The strace developers.
# All rights reserved.
#
# SPDX-License-Identifier: LGPL-2.1-or-later
print_help()
{
cat <<__EOF__
$0 [-h|--help] [-e|--include-email] [-|--stdin] [LAST_COMMIT [FIRST_COMMIT|--initial]]"
Prints list of contributors for the specified range of commits.
Options:
-h, --help Print this message and exit.
-e, --include-email
Include e-mail address of each contributer in the output.
-, --stdin Read the list of additional contributors from stdin.
LAST_COMMIT Last commit of the range. Default value is HEAD.
FIRST_COMMIT First commit in the range. Default is the last commit tagged
with a tag started with the character 'v'. If "--initial"
is specified, the first commit of the branch is used.
__EOF__
}
get_commit_id()
{
git rev-parse --verify "$1^{commit}"
}
SCRIPT='s/^[^:@<]\+:[[:space:]]*"\?\([^"<@[:space:]][^"<@]*\)"\?[[:space:]]\(<[^<@]\+@[^>]\+>\).*/\1 \2/p'
# Script for adding angle brackets to e-mail addresses in case they are absent
SCRIPT_NORM_EMAILS='s/[^[:space:]<@]\+@[^>]\+$/<\0>/'
MATCH_OUT='^\([^<@[:space:]][^<@]*\)[[:space:]]\(<[^<@]\+@[^>]\+>\)$'
OUT_EMAILS='\1 \2'
OUT_NO_EMAILS='\1'
read_stdin=0
include_email=0
while true; do
case "${1:-}" in
-h|--help)
print_help
exit 1
;;
-e|--include-email)
include_email=1
;;
-|--stdin)
read_stdin=1
;;
*)
break
;;
esac
shift
done
what="$(get_commit_id "${1:-@}")"
since="${2:-$(git describe --abbrev=0 --match='v*' "$what")}"
case "$since" in
--initial)
since="$(git rev-list --max-parents=0 $what)"
;;
*)
since="$(get_commit_id "$since")"
;;
esac
if [ 0 = "$include_email" ]; then
out="$OUT_NO_EMAILS"
else
out="$OUT_EMAILS"
fi
{
git log "^$since" "$what" | sed -n "$SCRIPT"
[ 0 = "$read_stdin" ] || sed "$SCRIPT_NORM_EMAILS"
} \
| git check-mailmap --stdin \
| LC_COLLATE=C sort -u \
| sed "s/$MATCH_OUT/$out/"