# Extract version number into 4 parts, some of which may be empty:

#

# version: the numeric part of the most recent tag. Will always look like 1.3.

#

# type: if an rc build, "rc", otherwise empty

#

# distance: the distance from the nearest tag, or empty if built from a tag

#

# node: the node|short hg was built from, or empty if built from a tag

gethgversion() {

    make cleanbutpackages

    HG="$PWD/hg"

    "$HG" version > /dev/null || { echo 'abort: hg version failed!'; exit 1 ; }

    hgversion=`LANGUAGE=C "$HG" version | sed -ne 's/.*(version \(.*\))$/\1/p'`

    if echo $hgversion | grep + > /dev/null 2>&1 ; then

        tmp=`echo $hgversion | cut -d+ -f 2`

        hgversion=`echo $hgversion | cut -d+ -f 1`

        distance=`echo $tmp | cut -d- -f 1`

        node=`echo $tmp | cut -d- -f 2`

    else

        distance=''

        node=''

    fi

    if echo $hgversion | grep -- '-' > /dev/null 2>&1; then

        version=`echo $hgversion | cut -d- -f1`

        type=`echo $hgversion | cut -d- -f2`

    else

        version=$hgversion

        type=''

    fi

}