###
# = github.sh(3)
# Luka Vandervelden <lukc@upyum.com>
#
# == NAME
# github.sh - for Frugalware
#
# == SYNOPSIS
# Common schema for packages hosted at Github, using git or tarballs
# depending on $USE_DEVEL.
#
# == EXAMPLE
# --------------------------------------------------
# pkgname=luafilesystem
# pkgver=1.5.0
# pkgrel=1
# pkgdesc="A library which extends the file-system capabilities of LUA."
# url="http://www.keplerproject.org/luafilesystem/"
# depends=('lua')
# groups=('lib-extra')
# archs=('x86_64')
# sha1sums=('1ee2ca3b5dbc3cf7c21c7168a0873b2983b7e241')
# _F_github_author=keplerproject
# Finclude github
# --------------------------------------------------
#
# == OPTIONS
# * _F_github_name: name of the project on Github.
# * _F_github_ver: name of the tag of the wanted version on Github.
# * _F_github_ext: file extension used for this Github archive.
# * _F_github_author: owner of the repository and of the project on which
#   to get the software.
# * _F_github_tag: default is empty, use if source has in $url/tags.
# * _F_github_sep: defaults to Fpkgversep
# * _F_github_full_archive_name: no default. used for mad tarball names eg:
# * _F_github_full_archive_name="THis_Is-some-MAD1_1_3-nam_e"
# * _F_github_grepv: no default , use like _F_archive_grepv
# * _F_github_prerelease: defaults to false. Don't filter out prereleases
#
# == APPENDED VARIABLES
# * source()
# == OVERWRITTEN VARIABLES
# * up2date
###

if [ -z "$_F_github_name" ]; then
	_F_github_name="$pkgname"
fi

if [ -z "$_F_github_dirname" ]; then
	_F_github_dirname="$_F_github_name"
fi


if [ -z "$_F_github_ver" ]; then
	_F_github_ver="$pkgver"
fi

if [ -z "$_F_github_author" ]; then
	_F_github_author="$_F_github_name"
fi

if [ -z "$_F_github_ext" ] ; then
	_F_github_ext=".tar.gz"
fi

if [ -z "$_F_github_sep" ]; then
	_F_github_sep="$Fpkgversep"
fi

if [ -z "$url" ]; then
	url=https://github.com/$_F_github_author/$_F_github_name
fi

if [[ -n "$_F_github_tag_v" ]]; then
	_F_github_tag_prefix="v"
fi

makedepends+=('jq' 'curl')

## set source to archive .. seems to be fine.
## releases , tags and tags_v are all under archive

## same for up2date

## bleh
## ok allow to set this as custom name too
if [[ -z "$_F_github_full_archive_name" ]]; then
	if [[ -n "$_F_github_tag_v" ]] || [[ -n "$_F_github_tag" ]]; then
		## tag_v should be v1.2.3.tar.gz
		_F_github_full_archive_name="${_F_github_tag_prefix}${_F_github_ver}"
	else
		## normal stuff should be $pkgname-$pkgver.tar.gz ( but what is normal on github!)
		## everything else _F_github_full_archive_name="someThIng_Like3-1_foo"
		_F_github_full_archive_name="${_F_github_name}${_F_github_sep}${_F_github_ver}"
	fi
fi

## __F* internal
__F_github_full_archive_name="${_F_github_full_archive_name}${_F_github_ext}"
_F_github_source="https://github.com/$_F_github_author/$_F_github_dirname/archive/${__F_github_full_archive_name}"

## heh ok
if [ -n "$_F_archive_grepv" ]; then
	_F_github_grepv="$_F_archive_grepv"
fi

if [ -n "$_F_github_grepv" ]; then
	off='| grep -v -- $_F_github_grepv'
fi

if [ -n "$_F_github_grep" ]; then
	on='| grep -- $_F_github_grep'
fi

if [ -n "$_F_github_tag_prefix" ]; then
	prefix="| sed 's/${_F_github_tag_prefix}//'"
	only_prefix="| grep -E '^${_F_github_tag_prefix}'"
fi

## fixme ?
if [ -n "$_F_github_devel" ]; then
	# Not checked, but may work.
	_F_scm_type=git
	_F_scm_url=https://github.com/$_F_github_author/${_F_github_name}.git
	Finclude scm
	unset _F_github_source _F_github_tag _F_github_tag_v source
else
	if [[ -n "$_F_github_tag_v" ]] || [[ -n "$_F_github_tag" ]]; then
		up2date="curl -s https://api.github.com/repos/${_F_github_author}/${_F_github_dirname}/git/matching-refs/tags | jq -r '.[].ref' | sed 's:refs/tags/::g' $only_prefix | tac $off $on $prefix | head -n1"
		_F_github_source="https://github.com/$_F_github_author/$_F_github_dirname/archive/refs/tags/${__F_github_full_archive_name}"

	else
		if [[ -n "$_F_github_prerelease" ]]; then
			up2date="curl -s https://api.github.com/repos/${_F_github_author}/${_F_github_dirname}/releases?per_page=100 |  jq -r '.[].tag_name' $off $on $prefix | head -n1 "
		else
			up2date="curl -s https://api.github.com/repos/${_F_github_author}/${_F_github_dirname}/releases?per_page=100 |  jq -r '.[] | select(.prerelease == false) | .tag_name' $off $on $prefix | head -n1 "
		fi
	fi

	# On one line for Mr Portability, Hermier Portability.
	source+=("${_F_github_source}")
fi