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#!/bin/sh

####################
#    Copyright (C) 2011 by Raphael Geissert <geissert@debian.org>
#
#
#    This file is free software: you can redistribute it and/or modify
#    it under the terms of the GNU General Public License as published by
#    the Free Software Foundation, either version 3 of the License, or
#    (at your option) any later version.
#
#    This file 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 General Public License for more details.
#
#    You should have received a copy of the GNU General Public License
#    along with this file.  If not, see <http://www.gnu.org/licenses/>.
####################

set -e

OLDSTABLE=lenny
STABLE=squeeze
TESTING=wheezy

export LANG=C

[ -f doc/DSA.template ] || {
    echo "error: call this script from the root of the repository" >&2
    exit 1
}

[ $# -ge 3 ] || {
    echo "usage: $0 [--save] DSA package vulnerability [cve(s) [bugnumber]]" >&2
    exit 1
}

save=false
if [ "$1" = "--save" ]; then
    save=true
    shift
fi

DSAID="$1"
PACKAGE="$(printf '%s' "$2" | tr "[:upper:]" "[:lower:]")"
VULNERABILITY="$3"
CVE="$(printf '%s' "$4" | tr "[:lower:]" "[:upper:]")"
BUGNUM="$5"

CVE="$(printf '%s' "$CVE" | sed 's/[ ,;]+/ /g' | tr ' ' "\n" | sort -n | tr "\n" ' ')"
cve_spacing=

for i in $(seq 0 16); do
    cve_spacing="$cve_spacing "
done
sed_cmd='s/((CVE-[0-9-]+[ ]+){4})(.+)$/\1\\n'"$cve_spacing"'\3/g;P;D'
CVE_LIST="$(printf '%s' "$CVE" | sed -r "$sed_cmd")"

case "$DSAID" in
    *-*)
	:
    ;;
    *)
	echo "warning: missing DSA revision number, assuming 1" >&2
	DSAID="$DSAID-1"
    ;;
esac

if grep -wq "DSA-$DSAID" data/DSA/list; then
    echo "error: DSA-$DSAID has already been used" >&2
    exit 1
fi

setvar() {
    local var="$1" value="$2"

    if [ -z "$value" ]; then
	value="$(eval 'printf "%s" "$'"$var"'"')"
    fi

    sed -i "s=\$$var=$value=g" "$tmpf"
}

tmpf=$(mktemp)
cat doc/DSA.template > $tmpf

name_length=$(echo -n "$DEBFULLNAME" | wc -c)
spacing=$((24-$name_length))
SPACEDDEBFULLNAME="$DEBFULLNAME"
while [ $spacing -gt 0 ]; do
    SPACEDDEBFULLNAME=" $SPACEDDEBFULLNAME"
    spacing=$((spacing-1))
done

DATE="$(date +"%B %d, %Y")"
date_length=$(echo -n "$DATE" | wc -c)
spacing=$((22-$date_length))
SPACEDDATE="$DATE"
while [ $spacing -gt 0 ]; do
    SPACEDDATE="$SPACEDDATE "
    spacing=$((spacing-1))
done

setvar DEBEMAIL
setvar DEBFULLNAME
setvar SPACEDDEBFULLNAME
setvar PACKAGE
setvar CVE "$CVE_LIST"
setvar REMLOCAL "${REMLOCAL:-remote}"
setvar DSAID
setvar BUGNUM
setvar VULNERABILITY
setvar DEBIANSPECIFIC "${DEBIANSPECIFIC:-no}"
setvar OLDSTABLE
setvar STABLE
setvar TESTING
setvar SPACEDDATE
setvar DATE

for dist in $OLDSTABLE $STABLE $TESTING UNSTABLE; do
    version="$(eval 'printf "%s" "$'"$dist"_VERSION'"')"
    [ -z "$version" ] || setvar "${dist}_VERSION" "$version"
done


if ! $save; then
    cat $tmpf
    echo
    echo " ---- "
    echo "Pass --save as the first parameter to save the text to DSA-$DSAID"
    echo "(the data/DSA/list entry will also be added)"
    rm -f "$tmpf"
    exit
else
    mv -i $tmpf "DSA-$DSAID" || { rm -f $tmpf; exit; }
    dsa_entry=$(mktemp)
    cat <<EOF > $dsa_entry
[$(date +"%d %b %Y")] DSA-$DSAID $PACKAGE - $VULNERABILITY
EOF

    if [ "$CVE" ]; then
	printf "\t{%s}\n" "$CVE" >> $dsa_entry
    fi

    for dist in $OLDSTABLE $STABLE; do
	version="$(eval 'printf "%s" "$'"$dist"_VERSION'"')"
	[ -z "$version" ] || \
	    printf "\t[%s] - %s %s\n" "$dist" "$PACKAGE" "$version" >> $dsa_entry
    done
    tmp_list="$(mktemp)"
    cat $dsa_entry data/DSA/list > $tmp_list
    cat $tmp_list > data/DSA/list
    rm -f $tmp_list
    echo "DSA text written to ./DSA-$DSAID"
fi

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