xdeptree

#!/bin/bash

get_deps() {
	local parents="$1" pkg="$2"
	local -i lvl="$3"
	local -a deps

	parents="${parents:+$parents/}$pkg"

	if (( MAXLVL > 0 && lvl >= MAXLVL )); then
		echo "${parents}"
		return
	fi

	if [ "${cache[$pkg]+_}" ]; then
		read -r -a deps <<< "${cache[$pkg]}"
	else
		mapfile -t deps < <( xbps-query ${REPO:+$ADDREPO} -x "$pkg" | xargs -rn1 xbps-uhelper getpkgdepname )
		cache[$pkg]="${deps[*]}"
	fi

	if [ "${#deps[@]}" -eq 0 ]; then
		echo "${parents}"
	fi

	lvl=$(( lvl + 1 ))
	for dep in "${deps[@]}"; do
		get_deps "$parents" "$dep" "$lvl"
	done
}

usage() {
	echo "Usage: xdeptree [-L level] [-R] <pkgname>" >&2
}


BRANCH=$(git symbolic-ref -q --short HEAD 2>/dev/null)
if [ -n "$XBPS_HOSTDIR" ]; then
	XBPS_BINPKGS="$XBPS_HOSTDIR/binpkgs"
else
	XBPS_DISTDIR="$(xdistdir 2>/dev/null)" || XBPS_DISTDIR=.
	XBPS_BINPKGS="$XBPS_DISTDIR/hostdir/binpkgs"
fi
ADDREPO="
	--repository=$XBPS_BINPKGS/$BRANCH
	--repository=$XBPS_BINPKGS/$BRANCH/nonfree
	--repository=$XBPS_BINPKGS/$BRANCH/multilib
	--repository=$XBPS_BINPKGS/$BRANCH/multilib/nonfree
	--repository=$XBPS_BINPKGS/$BRANCH/debug
	--repository=$XBPS_BINPKGS
	--repository=$XBPS_BINPKGS/nonfree
	--repository=$XBPS_BINPKGS/multilib
	--repository=$XBPS_BINPKGS/multilib/nonfree
	--repository=$XBPS_BINPKGS/debug
"

declare -i MAXLVL=0
REPO=''

while getopts L:Rh flag; do
	case "$flag" in
		L)
			if ! [[ "$OPTARG" =~ ^[0-9]+$ ]]; then
				usage; exit 1
			fi
			MAXLVL="$OPTARG"
			;;
		R) REPO=1 ;;
		h) usage; exit 0 ;;
		?) usage; exit 1 ;;
	esac
done

shift $(( OPTIND - 1 ))

PKG="$1"

if [ -z "$PKG" ]; then
	usage
	exit 1
fi

if ! command -v tree >/dev/null 2>&1; then
	echo "missing tree(1) command"
	exit 1
fi

declare -A cache=()

get_deps '' "$PKG" 0 | sort -u | tree -n --noreport --fromfile .