#!/bin/ksh
#
#	$OpenBSD: torture,v 1.2 2010/07/16 19:58:22 ray Exp $
#
# Copyright (c) 2003 Otto Moerbeek <otto@drijf.net>
#
# Permission to use, copy, modify, and distribute this software for any
# purpose with or without fee is hereby granted, provided that the above
# copyright notice and this permission notice appear in all copies.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
#
# Usage: torture file or directory
#
# Run a diff/patch/cmp regression on all available cvs revisions of a
# file or recursively on all files in a cvs checkout directory.
#
# Run this script on a freshly checked out cvs dir. Local modifications
# should not be touched, but this is not tested.
#
# Make sure you have $CVSROOT setup properly, preferably on a local
# cvs mirror. This shell script puts a lot of stress on your cvs
# server. It also can take very long to run, since it compares all
# pairs of available revisions of a file.
#
# The program appends run and failure information to the file torture.log
# in the startup directory. This log can be used to rerun failing tests.
#

DIFF=diff
DIFFOPTIONS=-au
PATCH=patch
PATCHOPTIONS=-s

TMP=/tmp/torture$$
trap 'rm -rf "$TMP"; exit 0' HUP INT QUIT PIPE TERM

FAILLOG="$PWD/$(basename $0).log"

revisions() {
    cvs log "$1" | awk '/^revision/ { print $2 }'
}

getrevs() {
    BASE=$(basename "$1")
    REVS=$(revisions "$1")

    for i in $REVS ; do
	cvs up -pr $i "$1" > "$TMP/$BASE.$i"
    done
}

dodiffs() {
    typeset pwd="$PWD"
    cd $TMP
    for i in $REVS ; do
	print -n "$BASE.$i "
	for j in $REVS ; do
	    $DIFF $DIFFOPTIONS "$BASE.$i" "$BASE.$j" > "diff-$i-$j"
	    cp "$BASE.$i" "$BASE.$i.copy"
	    $PATCH $PATCHOPTIONS "$BASE.$i.copy" < "diff-$i-$j" 2> /dev/null
	    cmp "$BASE.$i.copy" "$BASE.$j"
	    if [[ $? = 0 ]] ; then
		print -n .
	    else
		print " $j FAILED"
		print "# $pwd/$BASE.$i vs $j failed" >> "$FAILLOG"
		print "$0 $pwd/$BASE" >> "$FAILLOG"
	    fi
	    rm -f "$BASE.$i.copy" "diff-$i-$j"
	done
	print
    done
    cd "$pwd"
}

dofile() {
    typeset pwd="$PWD"
    typeset arg=$(basename "$1")

    cd $(dirname "$1")
    print $0 "$PWD/$arg"
    mkdir -p "$TMP"

    getrevs "$arg"
    dodiffs

    rm -rf "$TMP"
    cd "$pwd"
}

dodir() {
    typeset pwd="$PWD"
    cd "$1"
    print $0 "$PWD"
    list=$('ls' -A)
    for i in $list ; do
	if [[ "$i" != CVS ]] ; then
	   main "$i"
	fi
    done
    cd $pwd
}

print -n "# $0 $1: run started at " >> "$FAILLOG"
date >> "$FAILLOG"

main() {
    if [[ -f "$1" ]] ; then
	dofile "$1"
    elif [[ -d "$1" ]] ; then
	dodir "$1"
    fi
}

if [[ $# != 1 ]] ; then
    print Usage: $0 file or directory
    exit 1
fi

main "$1"

print -n "# $0 $1: run done at " >> "$FAILLOG"
date >> "$FAILLOG"