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+#!/bin/sh
+# Copyright 2002 Patrick J. Volkerding, Concord, CA, USA
+# Copyright 2018 Patrick J. Volkerding, Sebeka, Minnesota, USA
+# All rights reserved.
+#
+# Redistribution and use of this script, with or without modification, is
+# permitted provided that the following conditions are met:
+#
+# 1. Redistributions of this script must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#
+# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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.
+
+CWD=$(pwd)
+
+# Display usage for basic usage errors:
+usage() {
+ cat << EOF
+pkgdiff: missing file arguments
+Try 'pkgdiff --help' for more information.
+EOF
+}
+
+# Display full --help if requested:
+helpme() {
+ cat << EOF
+Usage: pkgdiff [OPTION] FILE1 FILE2
+Show which files are new and which are removed between two tar archives.
+The tar archives may be uncompressed, or compressed with gzip, bzip2,
+xz, or lzip. Also works with .rpm and .deb.
+
+ --help display this help and exit
+ -c use ANSI color with default tree mode
+ -a show simple text (ASCII) diff of package file lists
+
+By default, the trees are drawn with in crude ASCII with no color. For
+the full-color effect, try something like this:
+
+ pkgdiff -c package1 package2 | less -r
+
+EOF
+ # --help doesn't return
+ exit 22
+}
+
+# How the heck do I open this?
+explode() {
+ tar xf $1 1> /dev/null 2> /dev/null
+ # Check for common extensions and do additional magic:
+ if [ ! "$(basename $1)" = "$(basename $1 .zip)" ]; then
+ unzip $1 1> /dev/null 2> /dev/null
+ fi
+ if [ ! "$(basename $1)" = "$(basename $1 .rpm)" ]; then
+ cp $1 .
+ rpm2tgz $(basename $1) 1> /dev/null 2> /dev/null
+ rm -f $(basename $1)
+ tar xzf $(basename $1 .rpm).tgz 1> /dev/null 2> /dev/null
+ rm -f $(basename $1 .rpm).tgz
+ fi
+ if [ ! "$(basename $1)" = "$(basename $1 .deb)" ]; then
+ cp $1 .
+ ar x $(basename $1) 1> /dev/null 2> /dev/null
+ tar xf data.tar.xz 1> /dev/null 2> /dev/null
+ rm -f * 2> /dev/null
+ fi
+ # Diffs for other archive formats are welcome.
+}
+
+# Parse options.
+# -c turns on colorization ala dircolors:
+unset COLOR
+if [ "$1" = "-c" ]; then
+ COLOR="-C"
+ shift 1
+fi
+if [ "$1" = "-a" ]; then
+ ASCII=true
+ shift 1
+fi
+if [ "$1" = "--help" ]; then
+ helpme
+fi
+
+TMPDIR=$(mktemp -d)
+cd $TMPDIR
+
+if [ ! -r "$1" ]; then
+ if [ -d "$CWD/$1" ]; then
+ usage
+ exit 99
+ else
+ PKG1="$CWD/$1"
+ fi
+else
+ PKG1="$1"
+fi
+
+if [ ! -r "$2" ]; then
+ if [ -d "$CWD/$2" ]; then
+ usage
+ #echo "pkgdiff -- find the difference between two tar archives"
+ #echo "usage: pkgdiff [ -C ] pkg1 pkg2"
+ exit 99
+ else
+ PKG2="$CWD/$2"
+ fi
+else
+ PKG2="$2"
+fi
+
+# We have to account for the possibility that the packages have the
+# same name, but different contents...
+if [ "$(basename $PKG1)" = "$(basename $PKG2)" ]; then
+ PKG1=${PKG1}.orig
+fi
+
+# This will be mighty safe even if we ended up in /tmp.
+PKG=.pkgdiff.$(mcookie)
+
+( mkdir -p $TMPDIR/$PKG/1
+ cd $TMPDIR/$PKG/1
+ if [ -r $PKG1 ]; then
+ explode $PKG1
+ elif [ -r $(dirname $PKG1)/$(basename $PKG1 .orig) ]; then
+ explode $(dirname $PKG1)/$(basename $PKG1 .orig)
+ fi
+ if [ ! "$ASCII" = "true" ]; then
+ tree $COLOR -a --noreport > ../$(basename $PKG1)
+ else
+ find ./ | sed '2,$s,^\./,,' | tar --no-recursion -T - -cf - | tar tf - | sort > ../$(basename $PKG1)
+ fi
+)
+( mkdir -p $TMPDIR/$PKG/2
+ cd $TMPDIR/$PKG/2
+ explode $PKG2
+ if [ ! "$ASCII" = "true" ]; then
+ tree $COLOR -a --noreport > ../$(basename $PKG2)
+ else
+ find ./ | sed '2,$s,^\./,,' | tar --no-recursion -T - -cf - | tar tf - | sort > ../$(basename $PKG2)
+ fi
+)
+
+# Always going that extra mile... ;)
+if [ -r $PKG1 ]; then
+ touch -r $PKG1 $TMPDIR/$PKG/$(basename $PKG1)
+elif [ -r $(dirname $PKG1)/$(basename $PKG1 .orig) ]; then
+ touch -r $(dirname $PKG1)/$(basename $PKG1 .orig) $TMPDIR/$PKG/$(basename $PKG1)
+fi
+touch -r $PKG2 $TMPDIR/$PKG/$(basename $PKG2)
+
+rm -rf $TMPDIR/$PKG/{1,2}
+( cd $TMPDIR/$PKG ; diff -d -u $(basename $PKG1) $(basename $PKG2) )
+
+# cleanup:
+rm -rf $PKG $TMPDIR