#!/bin/sh -e
#
# Find missing dependencies by parsing 'ldd'.

db_dir=$KISS_ROOT/var/db/kiss/installed

# Check if package is installed and exit if it is not.
[ -d "$db_dir/${1-null}" ] || {
    printf '%s\n' "error: '$1' not installed." >&2
    exit 1
}

printf '%s\n' "=> Detected dependencies:"

while read -r file; do
    # Skip directories.
    [ -d "$KISS_ROOT/$file" ] && continue

    ldd "$KISS_ROOT/$file" 2>/dev/null | while read -r dep; do
        # Skip lines containing 'ldd'.
        [ "${dep##*ldd*}" ] || continue

        # Extract the file path from 'ldd' output.
        dep=${dep#* => }
        dep=${dep% *}

        # Traverse symlinks to get the true path to the file.
        pkg=$(readlink -f "$KISS_ROOT/${dep##$KISS_ROOT}")

        # Figure out which package owns the file.
        pkg=$(grep -lFx "${pkg##$KISS_ROOT}" "$db_dir/"*/manifest)
        pkg=${pkg%/*}
        pkg=${pkg##*/}

        case $pkg in
            # Skip listing these packages as dependencies.
            musl|gcc|$1) ;;
            *) printf '%s\n' "$pkg" ;;
        esac
    done &
done < "$db_dir/$1/manifest" | sort | uniq

printf '\n%s\n' "=> Package dependencies:"

[ -f "$db_dir/$1/depends" ] &&
    cat "$db_dir/$1/depends"