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#!/bin/sh
set -x
date
#
# 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

# What compression methods to use?
METHODS="gzip bzip2"

# 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.  Compare only files listed in
# the MANIFEST plus the MANIFEST itself.
if [ -d ${COMPARE}/previous ]; then
    if (diff ${COMPARE}/{previous,current}/MANIFEST); then
	for src in `cat ${COMPARE}/current/MANIFEST`; do
	    if (diff -I H5_VERS_RELEASE -I " released on " \
		${COMPARE}/{previous,current}/$src); then
		snapshot=no
	    else
		snapshot=yes
		break
	    fi
	done
    else
	snapshot=yes
    fi
else
    snapshot=yes
fi

# Make sure all the serial tests work.
if [ "$snapshot" = "yes" ]; then
    if (cd ${COMPARE}/current; make _test); then
	:
    else
	snapshot=no
    fi
    (cd ${COMPARE}/current; make distclean)
fi

# Release snapshot, update version, and commit to cvs
if [ "$snapshot" = "yes" ]; then
    (
	cd ${COMPARE}/current
	./bin/release -d $ARCHIVES $METHODS
	./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 0