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#!/bin/bash
# meld-src-pkgbuilds - compare source packages
#
# Copyright (C) 2020 bill-auger <bill-auger@programmer.net>
#
# SPDX-License-Identifier: AGPL-3.0-or-later
#
# 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.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <https://www.gnu.org/licenses/>.
# echo "$(grep 'WORKDIR=' /etc/libretools.conf | sed 's|^WORKDIR="\([^"]*\)"|\1|') IN"
# echo "$(grep 'WORKDIR=' /etc/libretools.conf | sed 's|^WORKDIR=||' | tr '"' ' ') IN"
readonly PKGS_DIR="$(source /etc/libretools.conf ; echo "${WORKDIR}" ;)"
readonly ABS_DIR=${PKGS_DIR}/arch
readonly ABSLIBRE_DIR=${PKGS_DIR}/abslibre
[[ ! -d "${PKGS_DIR:-/packages}" ]] && echo "no such dir" && exit 1
# readonly PKGS_DIR=$(grep 'WORKDIR=' /etc/libretools.conf | sed 's|.*WORKDIR="\([^"]*\)*"|\1|')
read -r -d '' USAGE <<-'USAGE_MSG'
USAGE:
meld-src-pkgbuilds [ -a ] [ -g ] PKGBUILD-or-srcpkg-or-pkgname PKGBUILD-or-srcpkg
OPTIONS:
-a UseAbs
-g UseGui
EXAMPLES:
# prompt for selection
$ meld-src-pkgbuilds base
# compare across repos
$ meld-src-pkgbuilds libre/base/PKGBUILD nonsystemd/base/PKGBUILD
# compare across versions
$ meld-src-pkgbuilds libre/base/base-*-any.src.tar.gz
USAGE_MSG
declare -i UseAbs=0
declare -i UseGui=0
SelectSrcpkg() # (pkgname)
{
# echo back parameter, if not a valid pkgname
local pkgname=$1
local pkgname_rx='^[0-9a-z][0-9a-zA-Z_-]*$'
local pkg
# echo "SelectSrcpkg() pkgname='$pkgname' sourcepkg $( [[ "$pkgname" =~ ${pkgname_rx} ]] && pacman -Si "$pkgname" &> /dev/null || echo " not")exists" >&2 ;
[[ "${pkgname}" =~ ${pkgname_rx} ]] && pacman -Si ${pkgname} &> /dev/null || return 1
# echo "SelectSrcpkg() pkgname=${pkgname} PKGS_DIR=$PKGS_DIR is $( pacman -Qsq ${pkgname} &> /dev/null || echo 'not ') installed" >&2
local srcpkgs_glob="${pkgname}-*.src.tar.gz"
local pkgs=( $(find "${PKGS_DIR}"/abslibre/ -type f -name "${srcpkgs_glob}" 2> /dev/null) \
$(find "${PKGS_DIR}"/sources/ -type f -name "${srcpkgs_glob}" 2> /dev/null) )
# printf "SelectSrcpkg() ${#pkgs[@]} pkgs=%s\n" "${pkgs[@]}" >&2
(( ${#pkgs[@]} )) && [[ -n "${pkgs[@]}" ]] || return 1
select pkg in "${pkgs[@]}" ; do echo "${pkg}" ; break ; done
}
GitPkgbuilds()
{
# echo "GitPkgbuilds() pkgname='$1' $( [[ "$1" =~ '^[-@\._\+0-9a-z]+$' ]] && echo t || echo f )" >&2
# local pkgbuild=$( [[ "$1" =~ /PKGBUILD$ ]] && echo "$1" )
# local pkgname_rx='^[-@\._\+0-9a-z]+$'
local pkgname_rx='^[0-9a-z][0-9a-zA-Z_-]*$'
local pkgname=$( [[ "$1" =~ ${pkgname_rx} ]] && echo "$1" )
local sort_order=$( [[ "$2" == '--reverse' ]] && echo '--reverse' )
# [[ -z "${pkgname}" ]] && echo "invalid pkgname: '$1'" >&2 && return 1
[[ -z "${pkgname}" ]] && return 1
local arch_dirs="$( find -L $ABS_DIR/ -maxdepth 2 -type d -name $pkgname | sort $sort_order)"
local abs_dirs="$( find $ABSLIBRE_DIR/ -maxdepth 2 -type d -name $pkgname | sort $sort_order)"
local arch_dir="$( head -n 1 <<<${arch_dirs})"
local abs_dir="$( head -n 1 <<<${abs_dirs} )"
local is_writable=$(touch ${abs_dir}/PKGBUILD &> /dev/null ; echo $(( ! $? )) ; )
echo -e "GitPkgbuilds() OUT\n arch_dirs=$arch_dir\n abs_dirs=$abs_dirs\n arch_dir=$arch_dir\n abs_dir=$abs_dir\n is_writable=$is_writable" >&2
[[ -z "$arch_dir" ]] && echo "no such arch PKGBUILD" >&2 && return 1
[[ -z "$abs_dir" ]] && echo "no such parabola PKGBUILD" >&2 && return 1
[[ "$arch_dir" =~ $ABS_DIR.+$ABS_DIR ]] && echo "multiple arch PKGBUILDs found (try --reverse)"
[[ "$abs_dir" =~ $ABSLIBRE_DIR.+$ABSLIBRE_DIR ]] && echo "multiple abslibre PKGBUILDs found (try --reverse)"
(( ! ${is_writable} )) && echo "fixing 'dev' group perms on ABS dir" && mkdev ${abs_dir}/
ls --color=auto --group-directories-first -F -l ${arch_dir}/trunk/ ${abs_dir}/
}
DoDiff()
{
local pkgbuild_a="$1"
local pkgbuild_b="$2"
local srcpkg_a="$3"
local srcpkg_b="$4"
local sed_rx='s|(\-\-\-\|\+\+\+) /dev/fd/[0-9]*\s*(.*)|\1 /PKGBUILD \2|'
local patch_file=srcpkgbuild.patch
echo "DoDiff() pkgbuild_a=$pkgbuild_a pkgbuild_b=$pkgbuild_b"
[[ -n "${pkgbuild_a}" && -n "${pkgbuild_b}" ]] || return 1
if [[ -n "${srcpkg_a}" && -n "${srcpkg_b}" ]]
then if diff "${srcpkg_a}" "${srcpkg_b}" &> /dev/null
then echo "source packages identical" ; return ;
else echo "source packages differ"
fi
fi
if diff "${pkgbuild_a}" "${pkgbuild_b}" &> /dev/null
then echo "PKGBUILDs identical"
else echo "PKGBUILDs differ"
if (( UseGui ))
then echo "launching meld"
meld "${pkgbuild_a}" "${pkgbuild_b}"
else diff -u -r "${pkgbuild_a}" "${pkgbuild_b}" | sed -E "${sed_rx}" | tee ${patch_file} >&2
fi
fi
}
main()
{
echo -e "meld-src-pkgbuilds() IN\n n_args$#\n 1=$1\n 2=$2\n GitPkgbuilds='$(GitPkgbuilds "$1")'" ; # $# $@" >&2 ; local in=$# ;
local pkgname_rx='^[0-9a-z][0-9a-zA-Z_-]*$'
local is_pkg_name=$( [[ "$1" =~ ${pkgname_rx} ]] ; echo $(( ! $? )) )
local is_src_pkg_a=$( [[ "$1" =~ src\.tar\.gz$ ]] ; echo $(( ! $? )) )
local is_src_pkg_b=$( [[ "$2" =~ src\.tar\.gz$ ]] ; echo $(( ! $? )) )
local is_pkgbuild_a=$( [[ "$1" =~ /PKGBUILD$ ]] ; echo $(( ! $? )) )
local is_pkgbuild_b=$( [[ "$2" =~ /PKGBUILD$ ]] ; echo $(( ! $? )) )
local srcpkg_a
local srcpkg_b
if (( is_pkg_name ))
then if (( UseAbs ))
then srcpkgs=( "$(GitPkgbuilds "$1")" )
srcpkg_a=${srcpkgs[0]}
srcpkg_b=${srcpkgs[1]}
else srcpkg_a="$( SelectSrcpkg "$1" || GitPkgbuilds "$1" )" ; is_src_pkg_a=1 ;
srcpkg_b="$( SelectSrcpkg "$1" || GitPkgbuilds "$1" )" ; is_src_pkg_b=1 ;
fi
else (( is_src_pkg_a && is_src_pkg_b )) && srcpkg_a="$1" srcpkg_b="$2"
(( is_pkgbuild_a && is_pkgbuild_b )) && srcpkg_a="$1" srcpkg_b="$2"
fi
local are_src_pkgs=$( (( is_src_pkg_a && is_src_pkg_b )) ; echo $(( ! $? )) )
local are_abs_dirs=$( (( UseAbs )) && [[ -d "${srcpkg_a}" && \
-d "${srcpkg_b}" ]] ; echo $(( ! $? )) )
local are_pkgbuilds=$( (( is_pkgbuild_a )) && [[ -f "${srcpkg_a}" ]] && \
(( is_pkgbuild_b )) && [[ -f "${srcpkg_b}" ]] ; echo $(( ! $? )) )
echo -e "meld-src-pkgbuilds()\n srcpkg_a=${srcpkg_a}\n srcpkg_b=${srcpkg_b}\n are_src_pkgs=$are_src_pkgs\n are_abs_dirs=$are_abs_dirs\n are_pkgbuilds=$are_pkgbuilds">&2
if [[ -z "${srcpkg_a}" || -z "${srcpkg_b}" || "${srcpkg_a}" == "${srcpkg_b}" ]]
then echo "arguments must be one <pkgname>, or two unique *.src.tar.gz or PKGBUILD"
elif (( are_src_pkgs ))
then local pkgbuild_a="$( [[ -f "${srcpkg_a}" ]] && tar -ztf "${srcpkg_a}" | grep PKGBUILD )"
local pkgbuild_b="$( [[ -f "${srcpkg_b}" ]] && tar -ztf "${srcpkg_b}" | grep PKGBUILD )"
echo -e "meld-src-pkgbuilds()\n pkgbuild_a=${pkgbuild_a}\n pkgbuild_b=${pkgbuild_b}\n tar_a_cmd=${tar_a_cmd[@]}\n tar_b_cmd=${tar_b_cmd[@]}" >&2
if [[ -n "${pkgbuild_a}" && -n "${pkgbuild_b}" ]]
then cd /tmp
tar -zxf "${srcpkg_a}" "${pkgbuild_a}" > ./srcpkgbuild_a
tar -zxf "${srcpkg_b}" "${pkgbuild_b}" > ./srcpkgbuild_b
DoDiff ./srcpkgbuild_a ./srcpkgbuild_b "${srcpkg_a}" "${srcpkg_b}"
rm ./srcpkgbuild_a ./srcpkgbuild_b
fi
elif (( are_abs_dirs ))
then DoDiff "${srcpkg_a}/PKGBUILD" "${srcpkg_b}/PKGBUILD"
elif (( are_pkgbuilds ))
then DoDiff "${srcpkg_a}" "${srcpkg_b}"
fi
}
# local UseGui=$( [[ "$1" == '--gui' ]] ; echo ! $(($?)) ) ; (( UseGui )) && shift ;
# local UseGui=$( while getopts 'g' opt ; do [[ "${opt}" == 'g' ]] ; echo $(( ! $? )) ; done ; shift $(( OPTIND - 1 )) ; )
while getopts 'ag' opt
do case "$opt" in
a) UseAbs=1 ;;
g) UseGui=1 ;;
*) echo "invalid option: '%s'" "${opt}\n${USAGE}" ; return 1 ;;
esac
done ; shift $(( OPTIND - 1 )) ; (( $# )) || ! echo "args err" || exit 1 ;
readonly UseAbs UseGui
main "$@"
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