#!/bin/sh
# --- SDE-COPYRIGHT-NOTE-BEGIN ---
# This copyright note is auto-generated by ./scripts/Create-CopyPatch.
#
# Filename: bin/sde-update-tree
# Copyright (C) 2007 - 2020 The OpenSDE Project
#
# More information can be found in the files COPYING and README.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; version 2 of the License. A copy of the
# GNU General Public License can be found in the file COPYING.
# --- SDE-COPYRIGHT-NOTE-END ---

#Description: Updates the entire working tree

[ -n "$SDEROOT" ] ||
	export SDEROOT="$(cd "${0%/*}/.."; pwd -P)"

. $SDEROOT/lib/libsde.in

update_usage() {
	local progname="$(echo "${0##*/}" | sed -e 's,-, ,g')"
	cat <<-EOT
	Usage:	$progname
	EOT
}

shortopts=
longopts='help'
options="$(getopt -o "$shortopts" -l "$longopts" -- "$@")"
if [ $? -ne 0 ]; then
	update_usage
	exit -1
fi

# load new arguments list
eval set -- "$options"

while [ $# -gt 0 ]; do
	case "$1" in
		--help)
			update_usage
			exit 0 ;;

		--)	shift; break ;;
		*)	echo_abort 1 "Unknown argument '$1', aborting."
	esac
	shift
done

# jump to the working tree's root
#
cd "$SDEROOT"

tree="${SDEROOT##*/}"

update_git()
{
	local prefix="$1"
	local branch="$(git symbolic-ref -q HEAD | sed -e 's|^refs/heads/||')"
	local remote="$(git config branch.$branch.remote)"
	local remote_list="$(git remote)"
	local remote_branch= remote_branch_list=
	local changes=false

	if [ -z "$remote_list" ]; then
		echo_warning "$prefix: no remotes set"
		return 0
	elif [ -n "$remote" -a -z "$( echo "$remote_list" | grep "^$remote\$" )" ]; then
		echo_abort 1 "$prefix: what?! '$remote' is gone!"
	elif [ -z "$remote" ]; then
		# uhm, get a good remote
		if [ "$( echo "$remote_list" | grep "^origin$" )" ]; then
			remote=origin
		else
			remote="$(echo "$remote_list" | head -n 1)"
		fi

		# and it's list of branches
		remote_branch_list="$(git branch -r | sed -n -e "s|^  $remote/||p" | grep -v '^HEAD$')"

		if [ -z "$remote_branch_list" ]; then
			echo_abort 1 "$prefix: no remote set, and couldn't guess one".
		elif [ "$( echo "$remote_branch_list" | grep "^$branch$" )" ]; then
			remote_branch="$branch"
		elif [ "$( echo "$remote_branch_list" | grep "^master$" )" ]; then
			remote_branch=master
		else
			remote_branch="$(echo "$remote_branch_list" | head -n 1)"
		fi
			
		echo_warning "$prefix: no remote set, assuming $remote/$remote_branch."
		git config branch.$branch.remote "$remote"
		git config branch.$branch.merge "refs/heads/$remote_branch"
	else
		echo_info "$prefix:"
	fi	

	if git reset -q; then
		git remote prune "$remote"
		if [ -n "$(git ls-files -md)" ]; then
			changes=true
			git stash > /dev/null
		fi
		git pull --rebase
		if $changes; then
			git stash pop > /dev/null
			git status --porcelain
		fi
	fi

	if [ -x "./update.sh" ]; then
		./update.sh "$prefix"
	fi
}

update_svn_nested()
{
	trap ':' INT
	# find svn:externals, and filter out sub-externals
	svn st | grep '^X' | cut -c8- | tee /tmp/$$.nested |
	while read f; do
		sed -i -e "s|^$f/.*||;" -e '/^$/d;' /tmp/$$.nested
	done
	cat /tmp/$$.nested
	rm -f /tmp/$$.nested
	trap '-' INT
}

update_svn()
{
	local prefix="$1" x=

	echo_info "$prefix:"
	svn up --ignore-externals
	if [ -x "./update.sh" ]; then
		./update.sh "$prefix"
	fi

	# nested svn
	for x in $( update_svn_nested ); do
		( cd "$x"; update_svn "$prefix/$x" )
	done
}

# hunt for the roots of the sub-working trees
#
baseurl="$( git config remote.origin.url | sed -e 's|/[^/]*$||' )"
[ -n "$baseurl" ] || baseurl="https://git.opensde.net/opensde"

set -- . \
	package:git+$baseurl/package-nopast.git \
	$( ls -1d package/* target/* 2> /dev/null )

for x; do

	if [ "$x" != "${x%%:*}" ]; then
		url="${x#*:}"
		x="${x%%:*}"
	else
		url=
	fi

	if [ -e "$x" -a ! -d "$x/" ]; then
		continue
	elif [ "$x" = "." ]; then
		prefix="$tree"
	else
		prefix="$tree/$x"
	fi

	if [ ! -d "$x" ]; then
		case "$url" in
		"")
			echo_warning "$prefix: missing"
			;;
		git+*)
			echo_info "$prefix"
			git clone "${url#git+}" "$x"
			;;
		*)
			echo_warning "$prefix: invalid url ($url)"
			;;
		esac
	elif [ -d "$x/.git" ]; then
		( cd "$x" && update_git "$prefix" )
	elif [ -d "$x/.svn" ]; then
		( cd "$x" && update_svn "$prefix" )
	fi
done