#!/bin/bash

# Copyright 2014-2015 Holger Levsen <holger@layer-acht.org>
#         © 2015 Mattia Rizzolo <mattia@mapreri.org>
# released under the GPLv=2

DEBUG=false
. /srv/jenkins/bin/common-functions.sh
common_init "$@"

# common code defining db access
. /srv/jenkins/bin/reproducible_common.sh

set -e

# build for different architectures
ARCHS="i386 mips arm arm64 riscv"

cleanup_tmpdir() {
	cd
	rm -r $TMPDIR
}

create_results_dirs() {
	mkdir -p $BASE/coreboot/dbd
}

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

# FIXME: include these variations
#build_rebuild() {
#( timeout -k 12h 12h nice ionice -c 3 sudo \
#		printf "BUILDUSERID=2222\nBUILDUSERNAME=pbuilder2\n" > $TMPCFG
#		  /usr/bin/linux64 --uname-2.6 \
#			/usr/bin/unshare --uts -- \
#					--hookdir /etc/pbuilder/rebuild-hooks \

#
# main
#

TMPDIR=$(mktemp --tmpdir=/srv/reproducible-results -d)  # where everything actually happens
trap cleanup_tmpdir INT TERM EXIT
cd $TMPDIR

DATE=$(date -u +'%Y-%m-%d %H:%M')
START=$(date +'%s')
mkdir b1 b2

echo "============================================================================="
echo "$(date -u) - Cloning the coreboot git repository with submodules now."
echo "============================================================================="
git clone --recursive http://review.coreboot.org/p/coreboot.git
cd coreboot
# still required because coreboot moved submodules and to take care of old git versions
git submodule update --init --checkout 3rdparty/blobs
COREBOOT="$(git log -1)"
COREBOOT_VERSION=$(git describe)

echo "============================================================================="
echo "$(date -u) - Building cross compilers for ${ARCHS} now."
echo "============================================================================="
for ARCH in ${ARCHS} ; do 
	make crossgcc-$ARCH
done

echo "============================================================================="
echo "$(date -u) - Building coreboot ${COREBOOT_VERSION} images now - first build run."
echo "============================================================================="
export TZ="/usr/share/zoneinfo/Etc/GMT+12"
# prevent failing using more than one CPU
sed -i 's#MAKE=$i#MAKE=make#' util/abuild/abuild
# use all cores for first build
NUM_CPU=$(cat /proc/cpuinfo |grep '^processor'|wc -l)
sed -i "s#cpus=1#cpus=$NUM_CPU#" util/abuild/abuild
sed -i 's#USE_XARGS=1#USE_XARGS=0#g' util/abuild/abuild
# actually build everything
bash util/abuild/abuild || true # don't fail the full job just because some targets fail

cd coreboot-builds
for i in * ; do
	if [ -f $i/coreboot.rom ] ; then
		mkdir $TMPDIR/b1/$i
		cp -p $i/coreboot.rom $TMPDIR/b1/$i/
	fi
done
cd ..
rm coreboot-builds -rf

echo "============================================================================="
echo "$(date -u) - Building coreboot images now - second build run."
echo "============================================================================="
export TZ="/usr/share/zoneinfo/Etc/GMT-14"
export LANG="fr_CH.UTF-8"
export LC_ALL="fr_CH.UTF-8"
# use allmost all cores for second build
NEW_NUM_CPU=$(echo $NUM_CPU-1|bc)
sed -i "s#cpus=$NUM_CPU#cpus=$NEW_NUM_CPU#" util/abuild/abuild
bash util/abuild/abuild || true # don't fail the full job just because some targets fail

export LANG="en_GB.UTF-8"
unset LC_ALL
export TZ="/usr/share/zoneinfo/UTC"

cd coreboot-builds
for i in * ; do
	if [ -f $i/coreboot.rom ] ; then
		mkdir $TMPDIR/b2/$i
		cp -p $i/coreboot.rom $TMPDIR/b2/$i/
	fi
done
cd ..
rm coreboot-builds -r
cd ..

TIMEOUT="30m"
DBDSUITE="unstable"
DBDVERSION="$(schroot --directory /tmp -c source:jenkins-reproducible-${DBDSUITE}-debbindiff debbindiff -- --version 2>&1)"
echo "============================================================================="
echo "$(date -u) - Running $DBDVERSION on coreboot images now"
echo "============================================================================="
# and creating the webpage while we're at it
PAGE=coreboot/coreboot.html
cat > $PAGE <<- EOF
<!DOCTYPE html>
<html lang="en-US">
  <head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width">
    <title>coreboot</title>
    <link rel='stylesheet' id='twentyfourteen-style-css'  href='landing_style.css?ver=4.0' type='text/css' media='all' />
  </head>
  <body>
    <div class="content">
      <div class="page-content">
        <p>&nbsp;</p>
        <p><center><img src="coreboot.png" width="300" class="alignnone size-medium wp-image-6" alt="coreboot" height="231" /></center></p>
        <blockquote>
          <p><strong>coreboot&trade;</strong>: fast, flexible <em>and reproducible</em> Open Source firmware?</p>
          <br />
        </blockquote>
EOF
write_page "       <h1>Reproducible Coreboot</h1>"
write_page "       <p><em>This is work in progress started on 2015-06-04.</em>"
write_page "       <em>Reproducible builds</em> enable anyone to reproduce bit by bit identical binary packages from a given source. 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>.<br />"
write_page "       <em>Reproducible Coreboot</em> is an effort to apply this to coreboot. Thus each coreboot.rom is build twice, with a few varitations added and then those two ROMs are compared using <a href=\"https://tracker.debian.org/debbindiff\">debbindiff</a>.<br />"
write_page "       Currently this is configured to be updated monthly, but as this is brand new, the udate frequency is much higher. Patches are very much welcome, the coreboot pages are solely generated by <a href=\"http://anonscm.debian.org/cgit/qa/jenkins.debian.net.git/tree/bin/reproducible_coreboot.sh\">reproducible_coreboot.sh</a>.<br />"
write_page "        Test were run on $DATE for version ${COREBOOT_VERSION}.<br /> <code>$COREBOOT</code>"
write_page "       </p>"
write_explaination_table coreboot
write_page "       <ul>"
ROMS=0
RROMS=0
create_results_dirs
cd b1
for i in * ; do
	let ROMS+=1
	call_debbindiff $i
	if [ -f $TMPDIR/$i.html ] ; then
		mv $TMPDIR/$i.html $BASE/coreboot/dbd/$i.html
		write_page "         <li><a href=\"dbd/$i.html\"><img src=\"/userContent/static/weather-showers-scattered.png\" alt=\"unreproducible icon\" />$i</a> is unreproducible.</li>"
	else
		write_page "         <li><img src=\"/userContent/static/weather-clear.png\" alt=\"reproducible icon\" />$i had no debbindiff output so its probably reproducible :)</li>"
		let RROMS+=1
	fi
done
PERCENT=$(echo "scale=1 ; ($RROMS*100/$ROMS)" | bc)
write_page "       </ul><p>$RROMS ($PERCENT%) out of $ROMS built coreboot images were reproducible.</p>"
cat >> $PAGE <<- EOF
      </div>
    </div>
EOF
write_page_footer
cd ..
publish_page

# the end
calculate_build_duration
print_out_duration
irc_message "$REPRODUCIBLE_URL/coreboot/ has been updated."

# remove coreboot tree, we don't need it anymore...
rm coreboot -r
cleanup_tmpdir
trap - INT TERM EXIT