Quick and (very) dirty bash script for generating a graphviz dot file showing pkg-config dependencies.

pkgdot.sh

#!/bin/bash

# Quick and (very) dirty bash script for generating a graphviz dot
# file showing pkg-config dependencies.

LIBDIR="lib64"

if [ $# -ne 1 ]; then
    echo "Usage: $0 pkg-config-name"
    return 1
fi

declare -A DONE

parse_pkg_config() {
    if [ "x${DONE[$1]}" != "xTRUE" ]; then
	TODO=""
	DONE[$1]="TRUE"

	OIFS="${IFS}"
	while IFS=':' read -ra PKG_PATHS; do
	    for PKG_PATH in "${PKG_PATHS[@]}"; do
		if [ -e "${PKG_PATH}/${1}.pc" ]; then
		    for PKG in `grep -Pi "^Requires: " "${PKG_PATH}/${1}.pc" | cut -b11- | sed -r 's/ >= [0-9\.]+//g'`; do
			echo "  \"$1\" -> \"$PKG\";"
			TODO="$TODO $PKG"
			# parse_pkg_config "$PKG"
		    done

		    break;
		fi
	    done
	done <<< "${PKG_CONFIG_PATH}:/usr/${LIBDIR}/pkgconfig:/usr/share/pkgconfig:/usr/local/${LIBDIR}/pkgconfig:/usr/local/share/pkgconfig"
	IFS="${OIFS}"

	for DEP in $TODO; do
	    parse_pkg_config "$DEP"
	done
    fi
}

echo "digraph {"

parse_pkg_config "$1"

echo "}"