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#!/bin/sh
# Read README.txt first.
# jpokorny@redhat.com

#
# helpers
#

announce () {
	# use colours if available
	echo
	if test -t 1; then
		echo -en "\\033[32m"
		echo -n "$1"
		echo -e "\\033[0m"
	else
		echo "[[ $1 ]]"

	fi
}

do_del () {
	#echo "delete $1?"
	[ -d "$1" ] && rm -rfI -- "$1" || echo "$1 not present"
}

do_wget () {
	# usage: $1 = action, $2 = target dir, $2..n = actual arguments to wget
	if [ $# -le 2 ]; then
		echo "do_wget: not enough arguments"
		exit 2
	fi
	if [ "$(dirname $2)" == "." ]; then
		toplevel="$2"
	else
		toplevel="$(dirname $2)"
	fi
	announce "$1 $toplevel (wget)"
	
	if [ "$1" == "get" ]; then
		wget -nv -P "$2" "${@:3}" 2>&1
	else
		do_del "$toplevel"
	fi
	ret=$?
	[ $ret -ne 0 ] && announce "action failed with exit status $?"
	return $ret
}

git_init_submodule () {
	# usage: $1 = action, $2..n submodules
	ret=0
	for submodule in "${@:2}"; do
		announce "$1 $submodule (git submodule)"
		if [ "$1" == "get" ]; then
			git submodule update --init "$submodule" 2>&1
		else
			do_del "$submodule"
		fi
		ret=$?
		[ $ret -ne 0 ] && break
	done
	[ $ret -ne 0 ] && announce "action failed with exit status $?"
	return $ret
}

#
# categories of plugins + recipes to get them
#

common () {
	announce "--- common ---"
	# local_vimrc:
	#   directory-local settings applied to contained files
	LOCAL_VIMRC_DIR="local-vimrc"
	LOCAL_VIMRC_URL="http://lh-vim.googlecode.com/svn/misc/trunk/plugin/local_vimrc.vim"
	# "plugin" directory has to be added (downloading recursively
	# the whole original "plugin" path for one file is impractical)
	do_wget $1 "$LOCAL_VIMRC_DIR/plugin" -nc "$LOCAL_VIMRC_URL"
}

python () {
	announce "--- python ---"
	# Python-mode:
	#   integrates pylint, rope, pydoc, pyflakes
	#   + extra highlighting, whitespace removal ...
	git_init_submodule $1 "git-python-mode"
}

tg2 () {
	announce "--- tg2 ---"
	# genshi-contrib:
	#   from genshi svn, contrib/vim
	#   TODO: is there a less complicated way to get these files?
	GENSHI_CONTRIB_DIR="genshi-contrib"
	GENSHI_CONTRIB_URL="http://svn.edgewall.org/repos/genshi/contrib/vim/"
	do_wget $1 "$GENSHI_CONTRIB_DIR" -nc -e robots=off -r -l3 -np -nH --cut-dirs=4 -R index.html "$GENSHI_CONTRIB_URL"
}

web () {
	announce "--- web ---"
	# empty for now
}

optional () {
	announce "--- optional ---"
	# makegreen:
	#   test results integration
	# Tagbar (possible alternative TagList):
	#   "code navigator" incl. JS support if jsctags installed
	git_init_submodule $1 "git-makegreen" "git-tagbar"
}

#
# go
#

main () {
	action="get"
	if [ "$1" == "get" -o "$1" == "del" ]; then
		action="$1"
		shift
	fi
	while [ -n "$1" ]; do
		case "$1" in
			common|python|tg2|web|optional)
				$1 $action || exit $?
				shift;;
			all)
				main $action common python tg2 web optional
				break;;
			help|*)
				echo "usage: ./init.sh [del] (common|python|tg2|web|optional|all)+"
				break;;
		esac
	done
}

if [ $# -eq 0 ]; then
	main help
else
	main "$@"
fi