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#!/bin/sh
set -x
#
# This script should be run nightly from cron.  It checks out hdf5
# from the CVS source tree and compares it against the previous
# snapshot.  If anything significant changed then a new snapshot is
# created, the minor version number is incremented, and the change is
# checked back into the CVS repository.
#

# Where are the snapshots stored?
ARCHIVES=/hdf3/ftp/pub/outgoing/hdf5/snapshots
if [ "$1" ]; then
    ARCHIVES="$1"
    shift
fi

# Create a working directory.  Hopefully one is left over from last
# time that still has the contents of the previous release.  But if
# not, just create one and assume that a snapshot is necessary.
COMPARE=${HOME}/hdf5-snapshots
test -d ${COMPARE} || mkdir -p ${COMPARE} || exit 1

# Check out the current version from CVS
if [ -z "$CVSROOT" ]; then
    echo "Where is the CVS repository?" 1>&2
    exit 1
fi
cvs -Q co -d ${COMPARE}/current hdf5 || exit 1

# Compare it with the previous version.
if [ -d ${COMPARE}/previous ]; then
    if (diff -r -I H5_VERS_RELEASE -I " release on " \
	    ${COMPARE}/previous ${COMPARE}/current >/dev/null); then
	update=yes
    else
        update=no
    fi
else
    update=yes
fi

# Release snapshot, update version, and commit to cvs
if [ "$update" = "yes" ]; then
   (cd ${COMPARE}/current; \
	./bin/release -d $ARCHIVES tar compress gzip bzip2; \
	./bin/h5vers -i; \
	cvs -Q commit -m Snapshot )
fi

# Replace the previous version with the current version.
rm -rf ${COMPARE}/previous
mv ${COMPARE}/current ${COMPARE}/previous
exit 1