#!/bin/sh

. "$LIXROOT/lib/versionformat.sh"

versionpasses() { # <package> <version> <constraints expression>

    index() { echo "$1" | tr -s '[:space:]' ' ' | cut -d' ' -f$2; }

    format="$(versionformat "$1")"
    version="$2"
    constraints="$3"
    value="yes"

    while [ "$constraints" != "" ]; do

        # handle 'or' operator
        if [ "$(index "$constraints" 1)" = "||" ]; then
            constraints="$(index "$constraints" 2-)"

            [ "$value" = "yes" ] \
            && break \
            || { value="yes" && continue; }
        fi

        # handle implicit 'and' operator
        if [ "$value" = "yes" ]; then
            value="$(vercmp -f "$format" "$version $(index "$constraints" -2)")"
        fi

        constraints="$(index "$constraints" 3-)"
    done

    echo "$value"
}