From d94badcd0be4f1f0bdc85a9e17f622373fcc42b2 Mon Sep 17 00:00:00 2001
From: Levente Polyak <anthraxx@archlinux.org>
Date: Wed, 18 May 2022 02:31:26 +0200
Subject: make: split out source files into src folder

---
 src/diffpkg.in | 228 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 228 insertions(+)
 create mode 100644 src/diffpkg.in

(limited to 'src/diffpkg.in')

diff --git a/src/diffpkg.in b/src/diffpkg.in
new file mode 100644
index 0000000..963f2c6
--- /dev/null
+++ b/src/diffpkg.in
@@ -0,0 +1,228 @@
+#!/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=config/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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