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#!/bin/bash
#
# SPDX-License-Identifier: GPL-3.0-or-later
shopt -s extglob
m4_include(lib/common.sh)
usage() {
cat <<- _EOF_
Usage: ${BASH_SOURCE[0]##*/} [OPTIONS] [MODES] [FILE|PKGNAME...]
Searches for a locally built package corresponding to the PKGBUILD, and
downloads the last version of that package from the Pacman repositories.
It then compares the package archives using different modes while using
simple tar content list by default.
When given one package, use it to diff against the locally built one.
When given two packages, diff both packages against each other.
In either case, a package name will be converted to a filename from the
cache, and diffpkg will proceed as though this filename was initially
specified.
OPTIONS
-M, --makepkg-config Set an alternate makepkg configuration file
-v, --verbose Provide more detailed/unfiltered output
-h, --help Show this help text
MODES
-l, --list Activate content list diff mode (default)
-d, --diffoscope Activate diffoscope diff mode
-p, --pkginfo Activate .PKGINFO diff mode
-b, --buildinfo Activate .BUILDINFO diff mode
_EOF_
}
MAKEPKG_CONF=/etc/makepkg.conf
VERBOSE=0
TARLIST=0
DIFFOSCOPE=0
PKGINFO=0
BUILDINFO=0
# option checking
while (( $# )); do
case $1 in
-h|--help)
usage
exit 0
;;
-M|--makepkg-config)
MAKEPKG_CONF="$2"
shift 2
;;
-l|--list)
TARLIST=1
shift
;;
-d|--diffoscope)
DIFFOSCOPE=1
shift
;;
-p|--pkginfo)
PKGINFO=1
shift
;;
-b|--buildinfo)
BUILDINFO=1
shift
;;
-v|--verbose)
VERBOSE=1
shift
;;
--)
shift
break
;;
-*,--*)
die "invalid argument: %s" "$1"
;;
*)
break
;;
esac
done
if ! (( DIFFOSCOPE || TARLIST || PKGINFO || BUILDINFO )); then
TARLIST=1
fi
# Source makepkg.conf; fail if it is not found
if [[ -r "${MAKEPKG_CONF}" ]]; then
# shellcheck source=makepkg-x86_64.conf
source "${MAKEPKG_CONF}"
else
die "${MAKEPKG_CONF} not found!"
fi
# Source user-specific makepkg.conf overrides
if [[ -r "${XDG_CONFIG_HOME:-$HOME/.config}/pacman/makepkg.conf" ]]; then
# shellcheck source=/dev/null
source "${XDG_CONFIG_HOME:-$HOME/.config}/pacman/makepkg.conf"
elif [[ -r "$HOME/.makepkg.conf" ]]; then
# shellcheck source=/dev/null
source "$HOME/.makepkg.conf"
fi
STARTDIR=$(pwd)
trap 'rm -rf $TMPDIR' EXIT INT TERM QUIT
TMPDIR=$(mktemp -d --tmpdir diffpkg-script.XXXXXXXX)
export TMPDIR
tar_list() {
bsdtar tf "$*" | if (( VERBOSE )); then
cat
else
sed -E 's|^usr/lib/modules/[0-9][^/]+|usr/lib/modules/[…]|g'
fi | sort
}
diff_pkgs() {
local oldpkg newpkg
oldpkg=$(readlink -m "$1")
newpkg=$(readlink -m "$2")
[[ -f $oldpkg ]] || die "No such file: %s" "${oldpkg}"
[[ -f $newpkg ]] || die "No such file: %s" "${newpkg}"
if (( TARLIST )); then
tar_list "$oldpkg" > "$TMPDIR/filelist-old"
tar_list "$newpkg" > "$TMPDIR/filelist"
sdiff -s "$TMPDIR/filelist-old" "$TMPDIR/filelist"
fi
if (( PKGINFO )); then
bsdtar xOqf "$oldpkg" .PKGINFO > "$TMPDIR/pkginfo-old"
bsdtar xOqf "$newpkg" .PKGINFO > "$TMPDIR/pkginfo"
sdiff -s "$TMPDIR/pkginfo-old" "$TMPDIR/pkginfo"
fi
if (( BUILDINFO )); then
bsdtar xOqf "$oldpkg" .BUILDINFO > "$TMPDIR/buildinfo-old"
bsdtar xOqf "$newpkg" .BUILDINFO > "$TMPDIR/buildinfo"
sdiff -s "$TMPDIR/buildinfo-old" "$TMPDIR/buildinfo"
fi
if (( DIFFOSCOPE )); then
diffoscope "$oldpkg" "$newpkg"
fi
}
fetch_pkg() {
local pkg pkgdest pkgurl
case $1 in
*://*)
pkgurl=$1 ;;
/*|*/*)
pkgurl=$(readlink -m "$1") ;;
*.pkg.tar*)
pkgurl=$1 ;;
'')
;;
*)
pkg=$1 ;;
esac
[[ -n $pkgurl ]] || pkgurl=$(pacman -Spdd --print-format '%l' --noconfirm "$pkg") ||
die "Couldn't download previous package for %s." "$pkg"
pkg=${pkgurl##*/}
pkgdest=$(mktemp -t -d "${pkg}-XXXXXX")/${pkg}
if [[ $pkgurl = file://* || ( $pkgurl = /* && -f $pkgurl ) ]]; then
ln -sf "${pkgurl#file://}" "$pkgdest"
elif [[ -f "$PKGDEST/$pkg" ]]; then
ln -sf "$PKGDEST/$pkg" "$pkgdest"
elif [[ -f "$STARTDIR/$pkg" ]]; then
ln -sf "$STARTDIR/$pkg" "$pkgdest"
elif [[ $pkgurl = *://* ]]; then
curl -fsLC - --retry 3 --retry-delay 3 -o "$pkgdest" "$pkgurl" || \
die "Couldn't download %s" "$pkgurl"
else
die "File not found: %s" "$pkgurl"
fi
echo "$pkgdest"
}
if (( $# < 2 )); then
if [[ ! -f PKGBUILD ]]; then
die "This must be run in the directory of a built package.\nTry '$(basename "$0") --help' for more information."
fi
# shellcheck source=PKGBUILD.proto
. ./PKGBUILD
if [[ ${arch[0]} == 'any' ]]; then
CARCH='any'
fi
for _pkgname in "${pkgname[@]}"; do
comparepkg=$_pkgname
pkgurl=
target_pkgver=$(get_full_version "$_pkgname")
if ! pkgfile=$(find_cached_package "$_pkgname" "$target_pkgver" "$CARCH"); then
die 'tarball not found for package: %s' "${_pkgname}-$target_pkgver"
fi
ln -s "$pkgfile" "$TMPDIR"
if (( $# )); then
comparepkg="$1"
fi
oldpkg=$(fetch_pkg "$comparepkg") || exit 1
diff_pkgs "$oldpkg" "$pkgfile"
done
else
file1=$(fetch_pkg "$1") || exit 1
file2=$(fetch_pkg "$2") || exit 1
diff_pkgs "$file1" "$file2"
fi
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