Differential D34208 Diff 105534 tools/tools/git/mfc-candidates.sh

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tools/tools/git/mfc-candidates.sh

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				#!/bin/sh

				#-
				# SPDX-License-Identifier: BSD-2-Clause-FreeBSD
				#
				# Copyright 2022 The FreeBSD Foundation
				#
				# This software was developed by Ed Maste
				# under sponsorship from the FreeBSD Foundation.
				#
				# Redistribution and use in source and binary forms, with or without
				# modification, are permitted providing that the following conditions
				# are met:
				# 1. Redistributions of source code must retain the above copyright
				# notice, this list of conditions and the following disclaimer.
				# 2. Redistributions in binary form must reproduce the above copyright
				# notice, this list of conditions and the following disclaimer in the
				# documentation and/or other materials provided with the distribution.
				#
				# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
				# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
				# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
				# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
				# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
				# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
				# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
				# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
				# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
				# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
				# SUCH DAMAGE.

				from_branch=freebsd/main
				to_branch=freebsd/stable/13
				author="${USER}"

				# If pwd is a stable or release branch tree, default to it.
				cur_branch=$(git symbolic-ref --short HEAD 2>/dev/null)
				case $cur_branch in
				stable/*)
				to_branch=$cur_branch
				;;
				releng/*)
				to_branch=$cur_branch
				major=${cur_branch#releng/}
				major=${major%.*}
				from_branch=freebsd/stable/$major
				esac

				params()
				{
				echo "from: $from_branch"
				echo "to: $to_branch"
				if [ -n "$author" ]; then
				echo "author/committer: $author"
				else
				echo "author/committer: <all>"
				fi
				}

				usage()
				{
				echo "usage: $(basename $0) [-ah] [-f from_branch] [-t to_branch] [-u user] [-X exclude_file] [path ...]"
				echo
				params
				exit 0
				}

				while getopts "af:ht:u:vX:" opt; do
				case $opt in
				a)
				# All authors/committers
				author=
				;;
				f)
				from_branch=$OPTARG
				;;
				h)
				usage
				;;
				t)
				to_branch=$OPTARG
				;;
				u)
				author=$OPTARG
				;;
				v)
				verbose=1
				;;
				X)
				if [ ! -r "$OPTARG" ]; then
				echo "Exclude file $OPTARG not readable" >&2
				exit 1
				fi
				exclude_file=$OPTARG
				;;
				esac
				done
				shift $(($OPTIND - 1))

				if [ $verbose ]; then
				params
				echo
				fi

				authorarg=
				if [ -n "$author" ]; then
				# Match user ID in the email portion of author or committer
				authorarg="--author <${author}@ --committer <${author}@"
				fi

				# Commits in from_branch after branch point
				commits_from()
				{
				git rev-list --first-parent $authorarg $to_branch..$from_branch "$@" \|\
				sort
				}

				# "cherry picked from" hashes from commits in to_branch after branch point
				commits_to()
				{
				git log $from_branch..$to_branch --grep 'cherry picked from' "$@" \|\
				sed -E -n 's/^[[:space:]]$cherry picked from commit ([0-9a-f]+)$[[:space:]]$/\1/p' \|\
				sort
				}

				# Turn a list of short hashes (and optional descriptions) into a list of full
				# hashes.
				canonicalize_hashes()
				{
				while read hash rest; do
				if ! git show --pretty=%H --no-patch $hash; then
				echo "error parsing hash list" >&2
				exit 1
				fi
				done \| sort
				}

				workdir=$(mktemp -d /tmp/find-mfc.XXXXXXXXXX)
				from_list=$workdir/commits-from
				to_list=$workdir/commits-to
				candidate_list=$workdir/candidates

				if [ -n "$exclude_file" ]; then
				exclude_list=$workdir/commits-exclude
				canonicalize_hashes < $exclude_file > $exclude_list
				fi

				commits_from "$@" > $from_list
				commits_to "$@" > $to_list

				comm -23 $from_list $to_list > $candidate_list

				if [ -n "$exclude_file" ]; then
				mv $candidate_list $candidate_list.bak
				comm -23 $candidate_list.bak $exclude_list > $candidate_list
				fi

				# Sort by (but do not print) commit time
				while read hash; do
				git show --pretty='%ct %h %s' --no-patch $hash
				done < $candidate_list \| sort -n \| cut -d ' ' -f 2-

				rm -rf "$workdir"