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#!/bin/sh
# Various common code used in the OBS (opensuse build service) related osmo-ci shell scripts

osmo_cmd_require \
	dch \
	dh \
	dpkg-buildpackage \
	gbp \
	git \
	meson \
	mktemp \
	osc \
	patch \
	sed \
	wget

# Create the source for a dummy package, that conflicts with another dummy package in the current directory. Example
# of the structure that will be generated:
# osmocom-nightly
# └── debian
#     ├── changelog
#     ├── compat
#     ├── control
#     ├── copyright
#     ├── rules
#     └── source
#         └── format
# $1: name of dummy package (e.g. "osmocom-nightly")
# $2: name of conflicting package (e.g. "osmocom-latest")
osmo_obs_prepare_conflict() {
	local pkgname="$1"
	local pkgname_conflict="$2"
	local pkgver="0.0.0"
	local oldpwd="$PWD"

	mkdir -p "$pkgname/debian/source"
	cd "$pkgname/debian"

	# Fill control, changelog, rules
	cat << EOF > control
Source: ${pkgname}
Section: unknown
Priority: optional
Maintainer: Oliver Smith <osmith@sysmocom.de>
Build-Depends: debhelper (>= 9)
Standards-Version: 3.9.8

Package: ${pkgname}
Depends: \${misc:Depends}
Architecture: any
Conflicts: ${pkgname_conflict}
Description: Dummy package, which conflicts with ${pkgname_conflict}
EOF
	cat << EOF > changelog
${pkgname} (${pkgver}) unstable; urgency=medium

  * Dummy package, which conflicts with ${pkgname_conflict}.

 -- Oliver Smith <osmith@sysmocom.de>  Thu, 13 Jun 2019 12:50:19 +0200
EOF
	cat << EOF > rules
#!/usr/bin/make -f
%:
	dh \$@
EOF

	# Finish up debian dir
	chmod +x rules
	echo "9" > compat
	echo "3.0 (native)" > source/format
	touch copyright

	# Put in git repository
	cd ..
	git init .
	git add -A
	git commit -m "auto-commit: $pkgname dummy package" || true
	git tag -f "$pkgver"

	cd "$oldpwd"
}

# Add dependency to all (sub)packages in debian/control and commit the change.
# $1: path to debian/control file
# $2: name of the package to depend on
osmo_obs_add_debian_dependency() {
	# Note: adding the comma at the end should be fine. If there is a Depends: line, it is most likely not empty. It
	# should at least have ${misc:Depends} according to lintian.
	sed "s/^Depends: /Depends: $2, /g" -i "$1"

	git -C "$(dirname "$1")" commit -m "auto-commit: debian: depend on $2" .
}

# Copy a project's rpm spec.in file to the osc package dir, set the version/source and 'osc add' it
# $1: oscdir (path to checked out OSC package)
# $2: repodir (path to git repository)
# $3: name (e.g. libosmocore)
osmo_obs_add_rpm_spec() {
	local oscdir="$1"
	local repodir="$2"
	local name="$3"
	local spec="$(find "$repodir" -name "$name.spec.in")"
	local tarball
	local version

	if [ -z "$spec" ]; then
		echo "WARNING: RPM spec missing: $name.spec.in"
		return
	fi

	cp "$spec" "$oscdir/$name.spec"

	# Set version
	version="$(grep "^Version: " "$oscdir"/*.dsc | cut -d: -f2 | xargs)"
	sed -i "s/^Version:.*/Version:  $version/g" "$oscdir/$name.spec"

	# Set source file
	tarball="$(ls -1 "${name}_"*".tar."*)"
	sed -i "s/^Source:.*/Source:  $tarball/g" "$oscdir/$name.spec"

	osc add "$name.spec"
}

# Get the path to a distribution specific patch, either from osmo-ci.git or from the project repository.
# $PWD must be the project repository dir.
# $1: distribution name (e.g. "debian8")
# $2: project repository (e.g. "osmo-trx", "limesuite")
osmo_obs_distro_specific_patch() {
	local distro="$1"
	local repo="$2"
	local ret

	ret="$OSMO_CI_DIR/obs-patches/$repo/build-for-$distro.patch"
	if [ -f "$ret" ]; then
		echo "$ret"
		return
	fi

	ret="debian/patches/build-for-$distro.patch"
	if [ -f "$ret" ]; then
		echo "$ret"
		return
	fi
}

# Copy an already checked out repository dir and apply a distribution specific patch.
# $PWD must be where all repositories are checked out in subdirs.
# $1: distribution name (e.g. "debian8")
# $2: project repository (e.g. "osmo-trx", "limesuite")
osmo_obs_checkout_copy() {
	local distro="$1"
	local repo="$2"
	local patch

	echo
	echo "====> Checking out $repo-$distro"

	# Verify distro name for consistency
	local distros="
		debian8
		debian10
	"
	local found=0
	local distro_i
	for distro_i in $distros; do
		if [ "$distro_i" = "$distro" ]; then
			found=1
			break
		fi
	done
	if [ "$found" -eq 0 ]; then
		echo "ERROR: invalid distro name: $distro, should be one of: $distros"
		exit 1
	fi

	# Copy
	if [ -d "$repo-$distro" ]; then
		rm -rf "$repo-$distro"
	fi
	cp -a "$repo" "$repo-$distro"
	cd "$repo-$distro"

	# Commit patch
	patch="$(osmo_obs_distro_specific_patch "$distro" "$repo")"
	if [ -z "$patch" ]; then
		echo "ERROR: no patch found for distro=$distro, repo=$repo"
		exit 1
	fi
	patch -p1 < "$patch"
	git commit --amend --no-edit debian/
	cd ..
}