#!/bin/sh

# Install vim plugins listed in $PLIST.
# Uninstall vim plugins not listed in $PLIST.
# Format of $PLIST: {start,opt} <clone-url>

trap clean EXIT

clean()
{
	rm -f "$TMP1" "$TMP2"
}

add()
{
	printf 'Installing %s in %s... ' "${2##*/}" "$1"
	git -C "${PPATH}/${1}" clone -q "$2" && printf 'done\n'
}

del()
{
	printf 'Deleting %s from %s... ' "${2##*/}" "$1"
	rm -rf "${PPATH:?}/${1}/${2##*/}" && printf 'done\n'
}

command -v "git" > /dev/null || { printf '%s: git: not found\n' "${0##*/}"; exit 1; }

TMP1=$(mktemp -t "${0##*/}".1.XXXXXXXXXX) || exit 1
TMP2=$(mktemp -t "${0##*/}".2.XXXXXXXXXX) || exit 1

PPATH="${HOME}/.vim/pack/plugins"
PLIST="${HOME}/.vim/pack/plugins/list"
mkdir -p "${PPATH}"/start \
	"${PPATH}"/opt

awk	'BEGIN { OFS = "\t" }
	!/^[[:blank:]]*(start|opt)/ { next }
	NF { print $1, $2 }' "$PLIST" | sort > "$TMP1"

find "$PPATH"/* -mindepth 1 -maxdepth 1 -type d | while IFS= read -r line; do
	printf '%s\t%s\n' \
		"$(dirname "${line#*plugins/}")" \
		"$(git -C "$line" remote get-url origin)"
done | sort > "$TMP2"

comm -13 "$TMP1" "$TMP2" | while read -r line; do
	del $line
done

comm -23 "$TMP1" "$TMP2" | while read -r line; do
	add $line
done

"$EDITOR" -c "helptags ALL" -c q