path: root/bin/reproducible_common.sh

#!/bin/bash

# Copyright 2014-2015 Holger Levsen <holger@layer-acht.org>
#              © 2015 Mattia Rizzolo <mattia@mapreri.org>
# released under the GPLv=2
#
# included by all reproducible_*.sh scripts
#
# define db
PACKAGES_DB=/var/lib/jenkins/reproducible.db
INIT=/var/lib/jenkins/reproducible.init
if [ -f $PACKAGES_DB ] && [ -f $INIT ] ; then
	if [ -f ${PACKAGES_DB}.lock ] ; then
		for i in $(seq 0 200) ; do
			sleep 15
			echo "sleeping 15s, $PACKAGES_DB is locked."
			if [ ! -f ${PACKAGES_DB}.lock ] ; then
				break
			fi
		done
		if [ -f ${PACKAGES_DB}.lock ] ; then
			echo "${PACKAGES_DB}.lock still exist, exiting."
			exit 1
		fi
	fi
elif [ ! -f ${PACKAGES_DB} ] ; then
	echo "Warning: $PACKAGES_DB doesn't exist, creating it now."
		/srv/jenkins/bin/reproducible_db_maintenance.py
	# 60 seconds timeout when trying to get a lock
	cat > $INIT <<-EOF
.timeout 60000
EOF
fi

# common variables
REPRODUCIBLE_URL=https://reproducible.debian.net
# shop trailing slash
JENKINS_URL=${JENKINS_URL:0:-1}

# suites being tested
SUITES="testing unstable experimental"
# arches being tested
ARCHES="amd64"
# number of cores to be used
NUM_CPU=$(grep -c '^processor' /proc/cpuinfo)

# existing usertags
USERTAGS="toolchain infrastructure timestamps fileordering buildpath username hostname uname randomness buildinfo cpu signatures environment umask ftbfs locale"

# we only need them for html creation but we cannot declare them in a function
declare -A SPOKENTARGET

BASE="/var/lib/jenkins/userContent/reproducible"
mkdir -p "$BASE"

# to hold reproducible temporary files/directories without polluting /tmp
TEMPDIR="/tmp/reproducible"
mkdir -p "$TEMPDIR"

# create subdirs for suites
for i in $SUITES ; do
	mkdir -p "$BASE/$i"
done

# tables for stats
TABLE[0]=stats_pkg_state
TABLE[1]=stats_builds_per_day
TABLE[2]=stats_builds_age
TABLE[3]=stats_bugs
TABLE[4]=stats_notes
TABLE[5]=stats_issues
TABLE[6]=stats_meta_pkg_state
TABLE[7]=stats_bugs_state

# known package sets
META_PKGSET[1]="essential"
META_PKGSET[2]="required"
META_PKGSET[3]="build-essential"
META_PKGSET[4]="build-essential-depends"
META_PKGSET[5]="popcon_top1337-installed-sources"
META_PKGSET[6]="key_packages"
META_PKGSET[7]="installed_on_debian.org"
META_PKGSET[8]="had_a_DSA"
META_PKGSET[9]="cii-census"
META_PKGSET[10]="gnome"
META_PKGSET[11]="gnome_build-depends"
META_PKGSET[12]="kde"
META_PKGSET[13]="kde_build-depends"
META_PKGSET[14]="xfce"
META_PKGSET[15]="xfce_build-depends"
META_PKGSET[16]="tails"
META_PKGSET[17]="tails_build-depends"
META_PKGSET[18]="grml"
META_PKGSET[19]="grml_build-depends"
META_PKGSET[20]="maint_pkg-perl-maintainers"
META_PKGSET[21]="maint_pkg-java-maintainers"
META_PKGSET[22]="maint_pkg-haskell-maintainers"
META_PKGSET[23]="maint_pkg-ruby-extras-maintainers"
META_PKGSET[24]="maint_pkg-golang-maintainers"
META_PKGSET[25]="maint_pkg-php-pear"
META_PKGSET[26]="maint_pkg-javascript-devel"
META_PKGSET[27]="maint_debian-boot"
META_PKGSET[28]="maint_debian-ocaml"
META_PKGSET[29]="maint_debian-x"
META_PKGSET[30]="maint_lua"

schedule_packages() {
	LC_USER="$REQUESTER" \
	LOCAL_CALL="true" \
	/srv/jenkins/bin/reproducible_remote_scheduler.py \
		--message "$REASON" \
		--no-notify \
		--suite "$SUITE" \
		$@
}

write_page() {
	echo "$1" >> $PAGE
}

set_icon() {
	# icons taken from tango-icon-theme (0.8.90-5)
	# licenced under http://creativecommons.org/licenses/publicdomain/
	STATE_TARGET_NAME="$1"
	case "$1" in
		reproducible)		ICON=weather-clear.png
					;;
		unreproducible|FTBR)	ICON=weather-showers-scattered.png
					;;
		FTBFS)			ICON=weather-storm.png
					;;
		404)			ICON=weather-severe-alert.png
					;;
		not_for_us|"not for us")	ICON=weather-few-clouds-night.png
					STATE_TARGET_NAME="not_for_us"
					;;
		blacklisted)		ICON=error.png
					;;
		*)			ICON=""
	esac
}

write_icon() {
	# ICON and STATE_TARGET_NAME are set by set_icon()
	write_page "<a href=\"/$SUITE/$ARCH/index_${STATE_TARGET_NAME}.html\" target=\"_parent\"><img src=\"/userContent/static/$ICON\" alt=\"${STATE_TARGET_NAME} icon\" /></a>"
}

write_page_header() {
	rm -f $PAGE
	MAINVIEW="stats"
	ALLSTATES="reproducible FTBR FTBFS 404 not_for_us blacklisted"
	ALLVIEWS="issues notes no_notes scheduled last_24h last_48h all_abc notify dd-list pkg_sets suite_stats repositories stats"
	GLOBALVIEWS="issues scheduled notify repositories stats"
	SUITEVIEWS="dd-list suite_stats"
	SPOKENTARGET["issues"]="issues"
	SPOKENTARGET["notes"]="packages with notes"
	SPOKENTARGET["no_notes"]="packages without notes"
	SPOKENTARGET["scheduled"]="currently scheduled"
	SPOKENTARGET["last_24h"]="packages tested in the last 24h"
	SPOKENTARGET["last_48h"]="packages tested in the last 48h"
	SPOKENTARGET["all_abc"]="all tested packages (sorted alphabetically)"
	SPOKENTARGET["notify"]="⚑"
	SPOKENTARGET["dd-list"]="maintainers of unreproducible packages"
	SPOKENTARGET["pkg_sets"]="package sets"
	SPOKENTARGET["suite_stats"]="suite: $SUITE"
	SPOKENTARGET["repositories"]="repositories overview"
	SPOKENTARGET["stats"]="reproducible stats"
	write_page "<!DOCTYPE html><html><head>"
	write_page "<meta http-equiv=\"Content-Type\" content=\"text/html; charset=UTF-8\" />"
	write_page "<link href=\"/userContent/static/style.css\" type=\"text/css\" rel=\"stylesheet\" />"
	write_page "<title>$2</title></head>"
	if [ "$1" != "$MAINVIEW" ] ; then
		write_page "<body><header><h2>$2</h2>"
	else
		write_page "<body onload=\"selectSearch()\"><header><h2>$2</h2>"
		write_page "<p>These pages are showing the <em>prospects</em> of <a href=\"https://wiki.debian.org/ReproducibleBuilds\" target=\"_blank\">reproducible builds of Debian packages</a>."
		write_page " The results shown were obtained from <a href=\"$JENKINS_URL/view/reproducible\">several jobs</a> running on"
		write_page " <a href=\"$JENKINS_URL/userContent/about.html#_reproducible_builds_jobs\">jenkins.debian.net</a>."
		write_page " Thanks to <a href=\"https://www.profitbricks.co.uk\">Profitbricks</a> for donating the virtual machine this is running on!</p>"
	fi
	if [ "$1" = "dd-list" ] || [ "$1" = "stats" ] ; then
		write_page "<p>Join <code>#debian-reproducible</code> on OFTC"
		write_page "   or <a href="mailto:reproducible-builds@lists.alioth.debian.org">send us an email</a>"
		write_page "   to get support for making sure your packages build reproducibly too. Also, we care about free software in general, so if you are an upstream developer or working on another distribution, we'd love to hear from you! Just now we've started to programatically test <a href=\"/coreboot/\">coreboot</a>, <a href=\"/openwrt/\">OpenWrt</a> and <a href=\"$JENKINS_URL/userContent/todo.html#_reproducible_netbsd\">NetBSD</a> - and there are plans to test <a href=\"$JENKINS_URL/userContent/todo.html#_reproducible_fedora\">Fedora</a> and <a href=\"$JENKINS_URL/userContent/todo.html#_reproducible_freebsd\">FreeBSD</a> soon too."
		write_page "</p>"
	fi
	write_page "<ul><li>Have a look at:</li>"
	for MY_STATE in $ALLSTATES ; do
		set_icon $MY_STATE
		write_page "<li>"
		write_icon
		write_page "</li>"
	done
	for TARGET in $ALLVIEWS ; do
		if [ "$TARGET" = "pkg_sets" ] && [ "$SUITE" = "experimental" ] ; then
			# no pkg_sets are tested in experimental
			continue
		fi
		SPOKEN_TARGET=${SPOKENTARGET[$TARGET]}
		BASEURL="/$SUITE/$ARCH"
		local i
		for i in $GLOBALVIEWS ; do
			if [ "$TARGET" = "$i" ] ; then
				BASEURL=""
			fi
		done
		for i in ${SUITEVIEWS} ; do
			if [ "$TARGET" = "$i" ] ; then
				BASEURL="/$SUITE"
			fi
		done
		if [ "$TARGET" = "suite_stats" ] ; then
			for i in $SUITES ; do
				write_page "<li><a href=\"/$i\">suite: $i</a></li>"
			done
		elif [ "$TARGET" = "notify" ] ; then
			write_page "<li><a href=\"$BASEURL/index_${TARGET}.html\" title=\"notify icon\">${SPOKEN_TARGET}</a></li>"
		else
			write_page "<li><a href=\"$BASEURL/index_${TARGET}.html\">${SPOKEN_TARGET}</a></li>"
		fi
	done
	write_page "<li><a href=\"https://wiki.debian.org/ReproducibleBuilds\" target=\"_blank\">wiki</a></li>"
	write_page "</ul>"
	if [ "$1" = "$MAINVIEW" ] ; then
		write_page "<form onsubmit=\"location.href='https://reproducible.debian.net/' + document.getElementById('SrcPkg').value; return false;\">"
		write_page "https://reproducible.debian.net/<input type=\"text\" id=\"SrcPkg\" />"
		write_page "<input type=\"submit\" value=\"submit source package name\" />"
	fi
	write_page "</header>"
}

write_page_intro() {
	write_page "       <p><em>Reproducible builds</em> enable anyone to reproduce bit by bit identical binary packages from a given source, so that anyone can verify that a given binary derived from the source it was said to be derived. There is a lot more information about <a href=\"https://wiki.debian.org/ReproducibleBuilds\">reproducible builds on the Debian wiki</a> and on <a href=\"https://reproducible.debian.net\">https://reproducible.debian.net</a>. The wiki explains in more depth why this is useful, what common issues exist and which workarounds and solutions are known.<br />"
	if [ "$1" = "coreboot" ] ; then
		write_page "        <em>Reproducible Coreboot</em> is an effort to apply this to coreboot. Thus each coreboot.rom is build twice (without payloads), with a few varitations added and then those two ROMs are compared using <a href=\"https://tracker.debian.org/debbindiff\">debbindiff</a>. Please note that the toolchain is not varied at all as the rebuild happens on exactly the same system. More variations are expected to be seen in the wild.</p>"
		local PROJECTNAME="$1"
		local PROJECTURL="https://review.coreboot.org/p/coreboot.git"
	elif [ "$1" = "OpenWrt" ] ; then
		write_page "        <em>Reproducible OpenWrt</em> is an effort to apply this to OpenWrt. Thus each OpenWrt target is build twice, with a few varitations added and then the resulting images and packages from the two builds are compared using <a href=\"https://tracker.debian.org/debbindiff\">debbindiff</a>, <em>which currently cannot detect <code>.bin</code> files as squashfs filesystems.</em> Thus the resulting debbindiff output is not nearly as clear as it could be - hopefully this limitation will be overcome soon. Also please note that the toolchain is not varied at all as the rebuild happens on exactly the same system. More variations are expected to be seen in the wild.</p>"
		local PROJECTNAME="openwrt"
		local PROJECTURL="git://git.openwrt.org/openwrt.git"
	elif [ "$1" = "NetBSD" ] ; then
		write_page "        <em>Reproducible NetBSD</em> is an effort to apply this to NetBSD. Thus each NetBSD target is build twice, with a few varitations added and then the resulting files from the two builds are compared using <a href=\"https://tracker.debian.org/debbindiff\">debbindiff</a>. Please note that the toolchain is not varied at all as the rebuild happens on exactly the same system. More variations are expected to be seen in the wild.</p>"
		local PROJECTNAME="netbsd"
		local PROJECTURL="https://github.com/jsonn/src"
	fi
	write_page "       <p>There is a monthly run <a href=\"https://jenkins.debian.net/view/reproducible/job/reproducible_$PROJECTNAME/\">jenkins job</a> to test the <code>master</code> branch of <a href=\"$PROJECTURL\">$PROJECTNAME.git</a>. Currently this job is triggered more often though, because this is still under development and brand new. The jenkins job is simply running <a href=\"http://anonscm.debian.org/cgit/qa/jenkins.debian.net.git/tree/bin/reproducible_$PROJECTNAME.sh\">reproducible_$PROJECTNAME.sh</a> in a Debian environment and this script is solely responsible for creating this page. Feel invited to join <code>#debian-reproducible</code> (on irc.oftc.net) to request job runs whenever sensible. Patches and other <a href=\"mailto:reproducible-builds@lists.alioth.debian.org\">feedback</a> are also very much appreciated!</p>"
}

write_page_footer() {
	write_page "<hr/><p style=\"font-size:0.9em;\">There is more information <a href=\"$JENKINS_URL/userContent/about.html\">about jenkins.debian.net</a> and about <a href=\"https://wiki.debian.org/ReproducibleBuilds\"> reproducible builds of Debian</a> available elsewhere. Last update: $(date +'%Y-%m-%d %H:%M %Z'). Copyright 2014-2015 <a href=\"mailto:holger@layer-acht.org\">Holger Levsen</a> and others, GPL2 licensed. The weather icons are public domain and have been taken from the <a href="http://tango.freedesktop.org/Tango_Icon_Library" target="_blank">Tango Icon Library</a>."
	if [ "$1" = "coreboot" ] ; then
		write_page "The <a href=\"http://www.coreboot.org\">Coreboot</a> logo is Copyright © 2008 by Konsult Stuge and coresystems GmbH and can be freely used to refer to the Coreboot project."
	elif [ "$1" = "NetBSD" ] ; then
		write_page "NetBSD® is a registered trademark of The NetBSD Foundation, Inc."
	fi
	write_page "</p></body></html>"
}

write_page_meta_sign() {
	write_page "<p style=\"font-size:0.9em;\">A package name displayed with a bold font is an indication that this package has a note. Visited packages are linked in green, those which have not been visited are linked in blue.</br>"
	write_page "A <code><span class=\"bug\">&#35;</span></code> sign after the name of a package indicates that a bug is filed against it. Likewise, a <code><span class=\"bug-patch\">&#43;</span></code> sign indicates there is a patch available. <code><span class=\"bug-done\">&#35;</span></code> indicates a closed bug. In cases of several bugs, the symbol is repeated.</p>"
}

write_explaination_table() {
	write_page "<p style=\"clear:both;\">"
	write_page "<table class=\"main\" id=\"variation\"><tr><th>variation</th><th>first build</th><th>second build</th></tr>"
	if [ "$1" = "debian" ] ; then
		write_page "<tr><td>hostname</td><td>$(hostname)</td><td>i-capture-the-hostname</td></tr>"
		write_page "<tr><td>domainname</td><td>$(hostname -d)</td><td>i-capture-the-domainname</td></tr>"
	else
		write_page "<tr><td>hostname</td><td colspan=\"2\"> is not yet varied between rebuilds of $1.</td></tr>"
		write_page "<tr><td>domainname</td><td colspan=\"2\"> is not yet varied between rebuilds of $1.</td></tr>"
	fi
	export CAPTURE_ENVIRONMENT="I capture the environment"
	write_page "<tr><td>env CAPTURE_ENVIRONMENT</td><td><em>not set</em></td><td>CAPTURE_ENVIRONMENT=\"I capture the environment\"</td></tr>"
	write_page "<tr><td>env TZ</td><td>TZ=\"/usr/share/zoneinfo/Etc/GMT+12\"</td><td>TZ=\"/usr/share/zoneinfo/Etc/GMT-14\"</td></tr>"
	write_page "<tr><td>env LANG</td><td>LANG=\"en_GB.UTF-8\"</td><td>LANG=\"fr_CH.UTF-8\"</td></tr>"
	write_page "<tr><td>env LC_ALL</td><td><em>not set</em></td><td>LC_ALL=\"fr_CH.UTF-8\"</td></tr>"
	write_page "<tr><td>env PATH</td><td>PATH=\"/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:\"</td><td>PATH=\"/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/i/capture/the/path\"</td></tr>"
	if [ "$1" = "debian" ] ; then
		write_page "<tr><td>env BUILDUSERID</td><td>BUILDUSERID=\"1111\"</td><td>BUILDUSERID=\"2222\"</td></tr>"
		write_page "<tr><td>env BUILDUSERNAME</td><td>BUILDUSERNAME=\"pbuilder1\"</td><td>BUILDUSERNAME=\"pbuilder2\"</td></tr>"
		write_page "<tr><td>env USER</td><td>USER=\"pbuilder1\"</td><td>USER=\"pbuilder2\"</td></tr>"
		write_page "<tr><td>uid</td><td>uid=1111</td><td>uid=2222</td></tr>"
		write_page "<tr><td>gid</td><td>gid=1111</td><td>gid=2222</td></tr>"
		write_page "<tr><td>env DEB_BUILD_OPTIONS</td><td>DEB_BUILD_OPTIONS=\"parallel=$NUM_CPU\"</td><td>DEB_BUILD_OPTIONS=\"parallel=$(echo $NUM_CPU-1|bc)\"<br />(using a different number of cores is on the agenda)</td></tr>"
		write_page "<tr><td>UTS namespace</td><td><em>shared with the host</em></td><td><em>modified using</em> /usr/bin/unshare --uts</td></tr>"
	else
		write_page "<tr><td>env USER</td><td colspan=\"2\"> is not yet varied between rebuilds of $1.</td></tr>"
		write_page "<tr><td>uid</td><td colspan=\"2\"> is not yet varied between rebuilds of $1.</td></tr>"
		write_page "<tr><td>gid</td><td colspan=\"2\"> is not yet varied between rebuilds of $1.</td></tr>"
		write_page "<tr><td>UTS namespace</td><td colspan=\"2\"> is not yet varied between rebuilds of $1.</td></tr>"
	fi
	write_page "<tr><td>kernel version, modified using /usr/bin/linux64 --uname-2.6</td><td>$(uname -sr)</td><td>$(/usr/bin/linux64 --uname-2.6 uname -sr)</td></tr>"
	write_page "<tr><td>umask</td><td>0022<td>0002</td><tr>"
	write_page "<tr><td>CPU type</td><td>$(cat /proc/cpuinfo|grep 'model name'|head -1|cut -d ":" -f2-)</td><td>same for both builds (currently, work in progress)</td></tr>"
	write_page "<tr><td>year, month, date</td><td>today ($DATE)</td><td>same for both builds (currently, work in progress)</td></tr>"
	if [ "$1" = "debian" ] ; then
		write_page "<tr><td>hour, minute</td><td>hour is usually the same...</td><td>usually, the minute differs... (currently, work in progress)</td></tr>"
		write_page "<tr><td><em>everything else...</em></td><td colspan=\"2\">is likely the same. So far, this is just about the <em>prospects</em> of <a href=\"https://wiki.debian.org/ReproducibleBuilds\">reproducible builds of Debian</a> - there will be more variations in the wild.</td></tr>"
	else
		write_page "<tr><td>hour, minute</td><td>hour is usually the same...</td><td>the minute differs... (currently, work in progress)</td></tr>"
		write_page "<tr><td><em>everything else...</em></td><td colspan=\"2\">is likely the same. There will be more variations in the wild.</td></tr>"
	fi
	write_page "</table></p>"
}

publish_page() {
	if [ "$1" = "" ] ; then
		TARGET=$PAGE
	else
		TARGET=$1/$PAGE
	fi
	cp $PAGE $BASE/$TARGET
	rm $PAGE
	echo "Enjoy $REPRODUCIBLE_URL/$TARGET"
}

link_packages() {
	set +x
        local i
	for (( i=1; i<$#+1; i=i+400 )) ; do
		local string='['
		local delimiter=''
		local j
		for (( j=0; j<400; j++)) ; do
			local item=$(( $j+$i ))
			if (( $item < $#+1 )) ; then
				string+="${delimiter}\"${!item}\""
				delimiter=','
			fi
		done
		string+=']'
		cd /srv/jenkins/bin
		DATA=" $(python3 -c "from reproducible_common import link_packages; \
				print(link_packages(${string}, '$SUITE', '$ARCH'))" 2> /dev/null)"
		cd - > /dev/null
		write_page "$DATA"
	done
	if "$DEBUG" ; then set -x ; fi
}

gen_packages_html() {
	local suite="$1"
	shift
	CWD=$(pwd)
	cd /srv/jenkins/bin
	local i
	for (( i=1; i<$#+1; i=i+100 )) ; do
		local string='['
		local delimiter=''
		local j
		for (( j=0; j<100; j++)) ; do
			local item=$(( $j+$i ))
			if (( $item < $#+1 )) ; then
				string+="${delimiter}\"${!item}\""
				delimiter=','
			fi
		done
		string+=']'
		python3 -c "from reproducible_html_packages import gen_packages_html; gen_packages_html(${string}, suite=\"${suite}\", no_clean=True)" || echo "Warning: cannot update html pages for ${string} in ${suite}"
	done
	cd "$CWD"
}

calculate_build_duration() {
	END=$(date +'%s')
	DURATION=$(( $END - $START ))
}

print_out_duration() {
	local HOUR=$(echo "$DURATION/3600"|bc)
	local MIN=$(echo "($DURATION-$HOUR*3600)/60"|bc)
	local SEC=$(echo "$DURATION-$HOUR*3600-$MIN*60"|bc)
	echo "$(date) - total duration: ${HOUR}h ${MIN}m ${SEC}s." | tee -a ${RBUILDLOG}
}

irc_message() {
	local MESSAGE="$@"
	kgb-client --conf /srv/jenkins/kgb/debian-reproducible.conf --relay-msg "$MESSAGE" || true # don't fail the whole job
}

call_debbindiff() {
	mkdir -p $TMPDIR/$1/$(dirname $2)
	local TMPLOG=(mktemp --tmpdir=$TMPDIR)
	local msg=""
	set +e
	( timeout $TIMEOUT schroot \
		--directory $TMPDIR \
		-c source:jenkins-reproducible-${DBDSUITE}-debbindiff \
		debbindiff -- \
			--html $TMPDIR/$1/$2.html \
			$TMPDIR/b1/$1/$2 \
			$TMPDIR/b2/$1/$2 2>&1 \
	) 2>&1 >> $TMPLOG
	RESULT=$?
	if ! "$DEBUG" ; then set +x ; fi
	set -e
	cat $TMPLOG # print dbd output
	rm -f $TMPLOG
	case $RESULT in
		0)	echo "$(date -u) - $1/$2 is reproducible, yay!"
			;;
		1)
			echo "$(date -u) - $DBDVERSION found issues, please investigate $1/$2"
			;;
		2)
			msg="$(date -u) - $DBDVERSION had trouble comparing the two builds. Please investigate $1/$2"
			;;
		124)
			if [ ! -s $TMPDIR/$1.html ] ; then
				msg="$(date -u) - $DBDVERSION produced no output for $1/$2 and was killed after running into timeout after ${TIMEOUT}..."
			else
				msg="$DBDVERSION was killed after running into timeout after $TIMEOUT, but there is still $TMPDIR/$1/$2.html"
			fi
			;;
		*)
			msg="$(date -u) - Something weird happened when running $DBDVERSION on $1/$2 (which exited with $RESULT) and I don't know how to handle it."
			;;
	esac
	if [ ! -z "$msg" ] ; then
		echo $msg | tee -a $TMPDIR/$1/$2.html
	fi
}

get_filesize() {
		local BYTESIZE="$(du -h -b $1 | cut -f1)"
		# numbers below 16384K are understood and more meaningful than 16M...
		if [ $BYTESIZE -gt 16777216 ] ; then
			SIZE="$(echo $BYTESIZE/1048576|bc)M"
		elif [ $BYTESIZE -gt 1024 ] ; then
			SIZE="$(echo $BYTESIZE/1024|bc)K"
		else
			SIZE="$BYTESIZE bytes"
		fi
}

#
# create the png (and query the db to populate a csv file...)
#
create_png_from_table() {
	echo "Checking whether to update $2..."
	# $1 = id of the stats table
	# $2 = image file name
	# $3 = meta package set, only sensible if $1=6
	echo "${FIELDS[$1]}" > ${TABLE[$1]}.csv
	# prepare query
	WHERE_EXTRA="WHERE suite = '$SUITE'"
	if [ $1 -eq 3 ] || [ $1 -eq 4 ] || [ $1 -eq 5 ] ; then
		# TABLE[3+4+5] don't have a suite column:
		WHERE_EXTRA=""
	elif [ $1 -eq 6 ] ; then
		# 6 is special too:
		WHERE_EXTRA="WHERE suite = '$SUITE' and meta_pkg = '$3'"
	fi
	# run query
	if [ $1 -eq 1 ] ; then
		# not sure if it's worth to generate the following query...
		sqlite3 -init ${INIT} --nullvalue 0 -csv ${PACKAGES_DB} "SELECT s.datum,
			 COALESCE((SELECT e.reproducible FROM stats_builds_per_day AS e where s.datum=e.datum and suite='testing'),0) as 'reproducible_testing',
			 COALESCE((SELECT e.reproducible FROM stats_builds_per_day AS e where s.datum=e.datum and suite='unstable'),0) as 'reproducible_unstable', 
			 COALESCE((SELECT e.reproducible FROM stats_builds_per_day AS e where s.datum=e.datum and suite='experimental'),0) as 'reproducible_experimental',
			 (SELECT e.unreproducible FROM stats_builds_per_day e WHERE s.datum=e.datum AND suite='testing') AS unreproducible_testing,
			 (SELECT e.unreproducible FROM stats_builds_per_day e WHERE s.datum=e.datum AND suite='unstable') AS unreproducible_unstable,
			 (SELECT e.unreproducible FROM stats_builds_per_day e WHERE s.datum=e.datum AND suite='experimental') AS unreproducible_experimental,
			 (SELECT e.FTBFS FROM stats_builds_per_day e WHERE s.datum=e.datum AND suite='testing') AS FTBFS_testing,
			 (SELECT e.FTBFS FROM stats_builds_per_day e WHERE s.datum=e.datum AND suite='unstable') AS FTBFS_unstable,
			 (SELECT e.FTBFS FROM stats_builds_per_day e WHERE s.datum=e.datum AND suite='experimental') AS FTBFS_experimental,
			 (SELECT e.other FROM stats_builds_per_day e WHERE s.datum=e.datum AND suite='testing') AS other_testing,
			 (SELECT e.other FROM stats_builds_per_day e WHERE s.datum=e.datum AND suite='unstable') AS other_unstable,
			 (SELECT e.other FROM stats_builds_per_day e WHERE s.datum=e.datum AND suite='experimental') AS other_experimental
			 FROM stats_builds_per_day AS s GROUP BY s.datum" >> ${TABLE[$1]}.csv
	elif [ $1 -eq 2 ] ; then
		# just make a graph of the oldest reproducible build (ignore FTBFS and unreproducible)
		sqlite3 -init ${INIT} -csv ${PACKAGES_DB} "SELECT datum, oldest_reproducible FROM ${TABLE[$1]} ${WHERE_EXTRA} ORDER BY datum" >> ${TABLE[$1]}.csv
	elif [ $1 -eq 7 ] ; then
		sqlite3 -init ${INIT} -csv ${PACKAGES_DB} "SELECT datum, $SUM_DONE, $SUM_OPEN from ${TABLE[3]} ORDER BY datum" >> ${TABLE[$1]}.csv
	else
		sqlite3 -init ${INIT} -csv ${PACKAGES_DB} "SELECT ${FIELDS[$1]} from ${TABLE[$1]} ${WHERE_EXTRA} ORDER BY datum" >> ${TABLE[$1]}.csv
	fi
	# this is a gross hack: normally we take the number of colors a table should have...
	#  for the builds_age table we only want one color, but different ones, so this hack:
	COLORS=${COLOR[$1]}
	if [ $1 -eq 2 ] ; then
		case "$SUITE" in
			testing)	COLORS=40 ;;
			unstable)	COLORS=41 ;;
			experimental)	COLORS=42 ;;
		esac
	fi
	# only generate graph if the query returned data
	if [ $(cat ${TABLE[$1]}.csv | wc -l) -gt 1 ] ; then
		echo "Updating $2..."
		DIR=$(dirname $2)
		mkdir -p $DIR
		echo "Generating $2."
		/srv/jenkins/bin/make_graph.py ${TABLE[$1]}.csv $2 ${COLORS} "${MAINLABEL[$1]}" "${YLABEL[$1]}"
		mv $2 $BASE/$DIR
		[ "$DIR" = "." ] || rmdir $(dirname $2)
	# create empty dummy png if there havent been any results ever
	elif [ ! -f $BASE/$DIR/$(basename $2) ] ; then
		DIR=$(dirname $2)
		mkdir -p $DIR
		echo "Creating $2 dummy."
		convert -size 1920x960 xc:#aaaaaa -depth 8 $2
		if [ "$3" != "" ] ; then
			local THUMB="${TABLE[1]}_${3}-thumbnail.png"
			convert $2 -adaptive-resize 160x80 ${THUMB}
			mv ${THUMB} $BASE/$DIR
		fi
		mv $2 $BASE/$DIR
		[ "$DIR" = "." ] || rmdir $(dirname $2)
	fi
	rm ${TABLE[$1]}.csv
}