#!/bin/bash
# build-deb -- Build a pacakge on a remote system with sbuild, then copy it back.
#
# Inspired by https://www.cs.unb.ca/~bremner/blog/posts/remote_sbuild/ which
# was itself adapted from cowpoke(1) from the "devscripts" package.

BUILDD_USERNAME=zulip
BUILDD_HOST=build0.zulip.net
BUILDD_BASE_PATH=/home/zulip/ubuntu/build/

dist=$1
file=$2

if [ -z "$dist" ] || [ -z "$file" ]; then
    echo "$(echo "$0" | rev | cut -d "/" -f  1-1 | rev) -- build Debian packages on a Zulip buildslave"
    echo
    echo "USAGE: $0 dist path/to/package.dsc"
    exit 1
fi

set -xe

ret=0
path=$(ssh -q -l "$BUILDD_USERNAME" "$BUILDD_HOST" -- "mktemp -d '$BUILDD_BASE_PATH/$USER.`date -u +%F.%R`.XXXXXXX'")/

dcmd rsync -vz --copy-links "$file" "$BUILDD_USERNAME@$BUILDD_HOST:$path/"
file=$(basename "$file")

# -A specifies to build arch-all packages (non-arch dependent) in addition to
# binary packages
#
# -s specifies the resultant .changes should also include a rebuilt source package
#
# --force-orig-source means the .changes will have a .orig.tar.* with it, which
# otherwise we might omit. We need the orig source when including in our
# repository even though dpkg-buildpackage might think otherwise, because the
# original version of the package was usually not included in our repository.
#
# We always build for amd64. There is no 32-bit.

ssh -t -l "$BUILDD_USERNAME" "$BUILDD_HOST" -- "cd '$path' && sbuild -A -s --force-orig-source '--dist=$dist' --arch=amd64 '$file'"

rsync -Lvz --copy-links "$BUILDD_USERNAME@$BUILDD_HOST:$path/*" .
ssh -l  "$BUILDD_USERNAME" "$BUILDD_HOST" rm -r "$path"

exit "$ret"