# Script to add reproducible-builds.org's patches to Ubuntu's dpkg
# See https://wiki.debian.org/ReproducibleBuilds
set -ex

mkdir -p dir.tmp
cd dir.tmp

# Get Ubuntu's current dpkg sources, and back them up
apt source dpkg
cp -a dpkg-1.18.4ubuntu1 dpkg-1.18.4ubuntu1.tmp

# Get the reproducible-builds feature branch
git clone git://anonscm.debian.org/reproducible/dpkg.git || true
cd dpkg
git checkout pu/reproducible_builds
git reset --hard 1.18.4
# Kludge: arrange for patches to apply by adding back missing files
dotfiles=`find . -type f -name '.*' `
tar -cf - $dotfiles debian/changelog | tar -C ../dpkg-1.18.4ubuntu1.tmp -xf -
cd ..

# Create a single patch that prepares for applying the patch series
diff -Naur dpkg-1.18.4ubuntu1 dpkg-1.18.4ubuntu1.tmp > 0000-changelog.patch || true

# Finally, create the patch series representing the reproducible-builds feature
cd dpkg
git reset --hard pu/1.18.5.0_reproducible1
git format-patch 1.18.4
cd ..

# Apply the patches
rm -rf dpkg-1.18.4ubuntu1.tmp
cd dpkg-1.18.4ubuntu1
cp debian/changelog debian/changelog.old
for a in ../0000-changelog.patch ../dpkg/0*.patch
do
    patch -p1 < $a
done
cat - debian/changelog.old > debian/changelog <<_EOF_
dpkg (1.18.5.0~reproducible1~ppa1) UNRELEASED; urgency=low

  * Apply reproducible-build.org patches atop Ubuntu's 1.18.4

 -- Daniel Richard Kegel (Temporary PPA signing key) <dank@kegel.com>  Mon, 09 May 2016 19:20:49 -0700

_EOF_
cd ..

mv dpkg-1.18.4ubuntu1 dpkg-1.18.5.0ubuntu1ppa1
cd dpkg-1.18.5.0ubuntu1ppa1
debuild -S -sd