#!/bin/sh

set -e
set -x

if [ "${1}" = "-u" ] && [ -n "${2}" ] ; then
	ORIG_URL="${2}"
	shift
	shift
fi

if [ -z "${1}" ] ; then
	echo "This tool creates a template Debian package out of a PyPi package name."
	echo "Once this script has run, make sure it did what you expected, then use"
	echo "the newly created source package as a template. Make sure you correct"
	echo "the debian/copyright file before publishing any package."
	echo "Usage: ${0} package-name"
	exit 1
fi

PKG_NAME=${1}
# Calculate the package name based on the command line argument
LOWER_PKG_NAME=`echo ${PKG_NAME} | awk '{print tolower($0)}'`
LOWER_PKG_NAME=`echo ${LOWER_PKG_NAME} | sed 's/_/-/g'`
if echo ${LOWER_PKG_NAME} | grep -q '^python-' ; then
	DEB_PKG_NAME=${LOWER_PKG_NAME}
else
	DEB_PKG_NAME=python-${LOWER_PKG_NAME}
fi
echo "===> Package name will be ${DEB_PKG_NAME}"

if ! [ -e ${PKG_NAME}.json ] ; then
	wget https://pypi.org/pypi/${PKG_NAME}/json -O ${PKG_NAME}.json
fi
PY3_PKG_NAME=python3-$(echo ${DEB_PKG_NAME} | sed 's/python-//g')

# Get the info from .json using jq
VERSION_STRING=$(cat ${PKG_NAME}.json | jq --raw-output '. | .info.version')
    SHORT_DESC=$(cat ${PKG_NAME}.json | jq --raw-output '. | .info.summary')
 UP_MAINT_NAME=$(cat ${PKG_NAME}.json | jq --raw-output '. | .info.author')
  AUTHOR_EMAIL=$(cat ${PKG_NAME}.json | jq --raw-output '. | .info.author_email')
      HOMEPAGE=$(cat ${PKG_NAME}.json | jq --raw-output '. | .info.home_page')
  FIRST_LETTER=$(echo ${PKG_NAME} | awk '{print substr($0,1,1)}')

if [ -e ${DEB_PKG_NAME}_${VERSION_STRING}.orig.tar.xz ] ; then
	ORIG=${DEB_PKG_NAME}_${VERSION_STRING}.orig.tar.xz
else
	ORIG=${DEB_PKG_NAME}_${VERSION_STRING}.orig.tar.gz
fi

echo "===> Package info:
Upstream version: ${VERSION_STRING}
Author: ${UP_MAINT_NAME}
Homepage: ${HOMEPAGE}"

if [ ! -e ${ORIG} ] ; then
	echo "===> Downloading ${ORIG} file"
	if [ -z "${ORIG_URL}" ] ; then
		if [ $(cat ${PKG_NAME}.json | jq --raw-output '. | .urls[0].packagetype') = "sdist" ] ; then
			ORIG_URL=$(cat ${PKG_NAME}.json | jq  --raw-output '. | .urls[0].url')
		else
			if [ $(cat ${PKG_NAME}.json | jq --raw-output '. | .urls[1].packagetype') = "sdist" ] ; then
				ORIG_URL=$(cat ${PKG_NAME}.json | jq  --raw-output '. | .urls[1].url')
			else
				echo "First and 2nd URL aren't sdist, please manually download..."
				exit 1
			fi
		fi
	fi
	wget -nv "${ORIG_URL}" -O ${ORIG}
fi

echo "===> Extracting ${ORIG}"
tar -xf ${ORIG}
if ! [ ${PKG_NAME}-${VERSION_STRING} = ${DEB_PKG_NAME}-${VERSION_STRING} ] ; then
	# The sed is in case there's a package called package_name with underscore, in which
	# case we want to replace that by dash
	mv $(echo ${PKG_NAME} | sed 's#_#*#g' | sed 's#-#*#g')-${VERSION_STRING} ${DEB_PKG_NAME}-${VERSION_STRING}
fi

echo "===> Creating debian folder for ${DEB_PKG_NAME}"
if [ ! -d ${DEB_PKG_NAME}-${VERSION_STRING}/debian/source ] ; then
	mkdir -p ${DEB_PKG_NAME}-${VERSION_STRING}/debian/source
fi
cd ${DEB_PKG_NAME}-${VERSION_STRING}

echo "===> Searching for sphinx doc folder"
if [ -e doc ] ; then
	DOC_FOLDER=doc
elif [ -e docs ] ; then
	DOC_FOLDER=docs
fi
if [ -n "${DOC_FOLDER}" ] ; then
	CONFPY_FILE=`find ${DOC_FOLDER} -name 'conf.py'`
	if [ -r "${CONFPY_FILE}" ] ; then
		DOC_FOLDER=`dirname ${CONFPY_FILE}`
		SPHINX_BUILD_DEP=", python3-sphinx"
		RULES_WITH=",sphinxdoc"
		SUGGEST_DOC="
Suggests: ${DEB_PKG_NAME}-doc"
	else
		DOC_FOLDER=
		SPHINX_BUILD_DEP=""
		RULES_WITH=""
		SUGGEST_DOC=""
	fi
fi

echo "===> Checking for PBR and fixing accordingly"
# If the package uses PBR, then we need openstack-pkg-tools
if grep -q "setup_requires=\['pbr'\]" ${DEB_PKG_NAME}-${VERSION_STRING}/setup.py ; then
	OSTACK_PKG_T_CTRL=", openstack-pkg-tools"
	# We need a mandatory include...
	# ... and the export OSLO_PACKAGE_VERSION=$(VERSION)
	OSTACK_PKG_T_RULES="include /usr/share/openstack-pkg-tools/pkgos.make
export OSLO_PACKAGE_VERSION=\$(VERSION)"
else
	# Otherwise, we just include it non-mandatorily, so that
	# we can use ./debian/rules gen-orig-xz
	OSTACK_PKG_T_CTRL=""
	OSTACK_PKG_T_RULES="-include /usr/share/openstack-pkg-tools/pkgos.make"
fi

echo "Source: ${DEB_PKG_NAME}
Section: python
Priority: optional
Maintainer: Debian OpenStack <team+openstack@tracker.debian.org>
Uploaders: Thomas Goirand <zigo@debian.org>
Build-Depends:
 debhelper (>= 10),
 dh-python,
 openstack-pkg-tools (>= 93~),
 python3-setuptools,
 python3-all${SPHINX_BUILD_DEP}${OSTACK_PKG_T_CTRL}
Standards-Version: 4.3.0
Vcs-Browser: https://salsa.debian.org/openstack-team/python/${DEB_PKG_NAME}
Vcs-Git: https://salsa.debian.org/openstack-team/python/${DEB_PKG_NAME}.git
Homepage: ${HOMEPAGE}

Package: ${PY3_PKG_NAME}
Architecture: all
Depends: \${python3:Depends}, \${misc:Depends}${SUGGEST_DOC}
Description: ${SHORT_DESC} - Python 3.x
 - REPLACE ME -
 .
 This package contains the Python 3.x module.
" >debian/control

if [ -n "${DOC_FOLDER}" ] ; then
	echo "Package: python-"$(echo ${LOWER_PKG_NAME} | sed s/python-//)"-doc
Section: doc
Architecture: all
Depends: \${misc:Depends}, \${sphinxdoc:Depends}
Description: ${SHORT_DESC} - doc
 - REPLACE ME -
 .
 This package contains the documentation.
" >>debian/control

	echo "Document: ${DEB_PKG_NAME}-doc
Title: ${PKG_NAME} Documentation
Author: N/A
Abstract: Sphinx documentation for ${PKG_NAME}
Section: Programming/Python

Format: HTML
Index: /usr/share/doc/python-${LOWER_PKG_NAME}-doc/html/index.html
Files: /usr/share/doc/python-${LOWER_PKG_NAME}-doc/html/*" >debian/python-${LOWER_PKG_NAME}-doc.doc-base
fi

EDITOR=touch dch --create --package ${DEB_PKG_NAME} --distribution unstable --urgency medium -v ${VERSION_STRING}-1
rm +1

echo "10" >debian/compat

if [ -n "${AUTHOR_EMAIL}" ] ; then
	UP_MAINT_AND_EMAIL="${UP_MAINT_NAME} <${AUTHOR_EMAIL}>"
else
	UP_MAINT_AND_EMAIL=${UP_MAINT_NAME}
fi
echo "Format: http://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: ${PKG_NAME}
Source: ${HOMEPAGE}

Files: *
Copyright: (c) 2019, ${UP_MAINT_AND_EMAIL}
License: Apache-2

Files: debian/*
Copyright: (c) 2019, Thomas Goirand <zigo@debian.org>
License: Apache-2

License: Apache-2
 Licensed under the Apache License, Version 2.0 (the \"License\");
 you may not use this file except in compliance with the License.
 You may obtain a copy of the License at
 .
    http://www.apache.org/licenses/LICENSE-2.0
 .
 Unless required by applicable law or agreed to in writing, software
 distributed under the License is distributed on an \"AS IS\" BASIS,
 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
 limitations under the License.
 .
 On Debian-based systems the full text of the Apache version 2.0 license
 can be found in /usr/share/common-licenses/Apache-2.0.
" >debian/copyright

if [ -n "${DOC_FOLDER}" ] ; then
	SPHINX_BUILD_RULES="override_dh_sphinxdoc:
ifeq (,\$(findstring nodoc, \$(DEB_BUILD_OPTIONS)))
	PYTHONPATH=. python3 -m sphinx -b html ${DOC_FOLDER} debian/python-"$(echo ${LOWER_PKG_NAME} | sed s/python-//)"-doc/usr/share/doc/python-"$(echo ${LOWER_PKG_NAME} | sed s/python-//)"-doc/html
	dh_sphinxdoc
endif
"
else
	SPHINX_BUILD_RULES=""
fi

if [ -e .testr.conf ] || [ -e .stestr.conf ] ; then
	UNIT_TEST_RULES="override_dh_auto_test:
ifeq (,\$(findstring nocheck, \$(DEB_BUILD_OPTIONS)))
	pkgos-dh_auto_test --no-py2
endif
"
else
	UNIT_TEST_RULES="
ifeq (,\$(findstring nocheck, \$(DEB_BUILD_OPTIONS)))
	set -e ; for pyvers in \$(PYTHON3S); do \\
		python\$\$pyvers setup.py test ; \\
	done
endif
"
fi

echo "#!/usr/bin/make -f

UPSTREAM_GIT := https://github.com/<please-user>/${PKG_NAME}.git
${OSTACK_PKG_T_RULES}

%:
	dh \$@ --buildsystem=python_distutils --with python3${RULES_WITH}

override_dh_auto_clean:
	rm -rf build .stestr
	find . -iname '*.pyc' -delete
	for i in \$\$(find . -type d -iname __pycache__) ; do rm -rf \$\$i ; done

override_dh_auto_build:
	echo \"Do nothing...\"

override_dh_auto_install:
	pkgos-dh_auto_install --no-py2 --in-tmp

${UNIT_TEST_RULES}

override_dh_auto_test:
	echo \"Do nothing...\"

${SPHINX_BUILD_RULES}
" >debian/rules
chmod +x debian/rules

echo "/usr" >debian/python3-${LOWER_PKG_NAME}.install

echo "version=3
opts=uversionmangle=s/(rc|a|b|c)/~\$1/ \\
https://pypi.debian.net/${PKG_NAME}/${PKG_NAME}-(.+)\.(?:zip|tgz|tbz|txz|(?:tar\.(?:gz|bz2|xz)))
" >debian/watch

echo "3.0 (quilt)" >debian/source/format
echo 'extend-diff-ignore = "^[^/]*[.]egg-info/"' >debian/source/options