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#!/bin/sh
echo "====================================="
echo "$0 $*"
echo "====================================="
set -x
date
uname -a
#
# 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.
#

# The path isn't properly initialized on hawkwind -- /usr/local/bin is
# either missing or is after /usr/bin when it should be before.
PATH="/usr/local/bin:$PATH"

# Where are the snapshots stored?
ARCHIVES_default=/afs/ncsa/ftp/HDF/pub/outgoing/hdf5/snapshots
ARCHIVES=$ARCHIVES_default

# Where are the HDF4 library?
# At NCSA, the standard place to find HDF4 software is in /usr/ncsa/.
HDF4LIB_default="/usr/ncsa/include,/usr/ncsa/lib"
HDF4LIB=$HDF4LIB_default

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

# Use User's MAKE if set.  Else use generic make.
MAKE=${MAKE:-make}

# Make sure cvs would work
if [ -z "$CVSROOT" ]; then
    echo "Where is the CVS repository?" 1>&2
    exit 1
fi

#
# Command options
cmd="all"
test_opt=""
errcode=0
while [ $# -gt 0 ] ; do
    case "$1" in
	all)	
	    cmd="all"
	    ;;
	checkout)
	    cmdcheckout="checkout"
	    cmd=""
	    ;;
	diff)
	    cmddiff="diff"
	    cmd=""
	    ;;
	test)
	    cmdtest="test"
	    cmd=""
	    ;;
	srcdir)
	    #use srcdir option for test
	    srcdir="yes"
	    ;;
	srcdirname)
	    shift
	    if [ $# -lt 1 ]; then
		echo "srcdirname <dir> missing"
		errcode=1
		cmd="help"
		break
	    fi
	    SRCDIRNAME="$1"
	    ;;
	release)
	    cmdrel="release"
	    cmd=""
	    ;;
	clean | distclean)
	    cmdclean="$1"
	    cmd=""
	    ;;
	help)
	    cmd="help"
	    break
	    ;;
	hdf4)
	    shift
	    if [ $# -lt 1 ]; then
		echo "HDF4LIB information missing"
		errcode=1
		cmd="help"
		break
	    fi
	    HDF4LIB="$1"
	    ;;
	archive)
	    shift
	    if [ $# -lt 1 ]; then
		echo "Archive pathname missing"
		errcode=1
		cmd="help"
		break
	    fi
	    ARCHIVES="$1"
	    ;;
	--*)
	    OP_CONFIGURE="$OP_CONFIGURE $1"
	    ;;
	op-configure)
	    shift
	    if [ $# -lt 1 ]; then
		echo "op-configure option missing"
		errcode=1
		cmd="help"
		break
	    fi
	    OP_CONFIGURE="$OP_CONFIGURE $1"
	    ;;
	*)
	    echo "Unkown option $1"
	    errcode=1
	    cmd="help"
	    break
	    ;;
    esac
    shift
done

if [ "$cmd" = help ]; then
    set -
    cat <<EOF
Usage: $0 [all] [checkout] [test] [srcdir] [release] [help]
          [hdf4 <hdf4lib_path>] [archive <arch_path>] [dir <dir>]
	  [op-configure <option>] [--<option>]
    all:      Run all commands (checkout, test & release)
              [Default is all]
    checkout: Run cvs checkout
    diff:     Run diff on current and previous versions.  Exit 0 if
              no significant differences are found.  Otherwise, non-zero.
    test:     Run test
    release:  Run release
    clean:    Run make clean
    distclean:Run make distclean
    srcdir:   Use srcdir option (does not imply other commands)
              "snapshot srcdir" is equivalent to "snapshot srcdir all"
              "snapshot srcdir checkout" is equivalent to "snapshot checkout"
    srcdirname <dir>:
              Use <dir> as the srcdir testing directory if srcdir is choosen.
              If <dir> starts with '-', it is append to the default name
              E.g., "snapshot srcdir srcdirname -xx" uses hostname-xx
              [Default is hostname]
    help:     Print this message
    hdf4 <hdf4lib_path>:
              Use <hdf4lib_path> as the HDF4LIB locations
              [Default is $HDF4LIB_default]
    archive <arch_path>:
              Use <arch_path> as the release ARCHIVE area
              [Default is $ARCHIVES_default]
    op-configure <option>:
              Pass <option> to the configure command
              E.g., "snapshot op-configure --enable-parallel"
                  configures for parallel mode
    --<option>:
              Pass --<option> to the configure command
              E.g., "snapshot --enable-parallel"
                  configures for parallel mode
EOF
    exit $errcode
fi

# Setup the proper configure option (--with-hdf4) to use hdf4 library
# provide HDF4LIB is non-empty.
HDF4LIB=${HDF4LIB:+"--with-hdf4="$HDF4LIB}
CONFIGURE="./configure $HDF4LIB $OP_CONFIGURE"

# Execute the requests
snapshot=yes

if [ -f bin/snapshot_version ]; then
    . bin/snapshot_version
else
    H5VERSION=hdf5
fi

BASEDIR=${HOME}/snapshots-${H5VERSION}
CURRENT=${BASEDIR}/current
PREVIOUS=${BASEDIR}/previous
HOSTNAME=`hostname | cut -f1 -d.`	# no domain part
if [ $H5VERSION != hdf5 ]; then
    CVSVERSION="-r $H5VERSION"
else
    CVSVERSION=				# use the default (main) version
fi

# Try finding a version of diff that supports the -I option too.
DIFF=diff
for d in `echo $PATH | sed -e 's/:/ /g'` ; do
    test -x $d/diff && $d/diff -I XYZ /dev/null /dev/null > /dev/null 2>&1 &&
	DIFF=$d/diff && break
done

#=============================
# Run CVS checkout
#=============================
if [ "$cmd" = "all" -o -n "$cmdcheckout" ]; then
    # 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.
    test -d ${BASEDIR} || mkdir -p ${BASEDIR} || exit 1

    # If there is a Makefile in ${CURRENT}, the last test done in it
    # has not been distclean'ed.  They would interfere with other
    # --srcdir build since make considers the files in ${CURRENT} 
    # take precedence over files in its own build-directory.  Run
    # a "make distclean" to clean them all out.  This is not really
    # part of the "checkout" functions but this is the most convenient
    # spot to do the distclean.  We will also continue the checkout process
    # regardless of the return code of distclean.
    ( cd ${CURRENT}; test -f Makefile && ${MAKE} distclean)

    # Check out the current version from CVS
    cvs -Q co -d ${CURRENT} ${CVSVERSION} hdf5 || exit 1
fi # Do CVS checkout


#=============================
# Run Test the HDF5 library
#=============================
if [ "$cmd" = "all" -o -n "$cmdtest" -o -n "$cmddiff" ]; then
    # setup if srcdir is used.
    if [ -z "$srcdir" ]; then
	TESTDIR=${CURRENT}
    else
	#create TESTDIR if not exist yet
	case "$SRCDIRNAME" in
	"")
	    SRCDIRNAME=$HOSTNAME
	    ;;
	-*)
	    SRCDIRNAME="$HOSTNAME$SRCDIRNAME"
	    ;;
	esac
	TESTDIR=${BASEDIR}/TestDir/${SRCDIRNAME}
	test -d ${TESTDIR} || mkdir ${TESTDIR}
    fi
    INSTALLDIR=${TESTDIR}/installdir
    test -d $INSTALLDIR || mkdir $INSTALLDIR
    # Make sure current version exists and is clean
    if [ -d ${TESTDIR} ]; then
	(cd ${TESTDIR} && ${MAKE} distclean)
    else
	errcode=$?
        snapshot=no
        exit $errcode
    fi

    # Compare it with the previous version.  Compare only files listed in
    # the MANIFEST plus the MANIFEST itself.
    if [ -d ${PREVIOUS} ]; then
	if (${DIFF} -c ${PREVIOUS}/MANIFEST ${CURRENT}/MANIFEST); then
	    snapshot=no
	    for src in `grep '^\.' ${CURRENT}/MANIFEST|expand|cut -f1 -d' '`; do
		if ${DIFF} -I H5_VERS_RELEASE -I " released on " \
		    -I " currently under development" \
		    ${PREVIOUS}/$src ${CURRENT}/$src
		then
		    :	#continue
		else
		    snapshot=yes
		    break
		fi
	    done
	fi
    fi

    # if diff is choosen, exit 0 if no significant differences are found.
    # otherwise, exit 1.  This includes cases of other failures.
    if [ -n "$cmddiff" ]; then
	if [ $snapshot = no ]; then
	    exit 0
	else
	    exit 1
	fi
    fi

    # Build, run tests and install procedures
    if [ "$snapshot" = "yes" ]; then
	if (cd ${TESTDIR} && \
	    ${srcdir:+${CURRENT}/}${CONFIGURE} --prefix=$INSTALLDIR && \
	    ${MAKE} && \
	    ${MAKE} check && \
	    ${MAKE} install install-doc && \
	    ${MAKE} check-install && \
	    ${MAKE} uninstall uninstall-doc); then
	    :
	else
	    errcode=$?
	    snapshot=no
	    exit $errcode
	fi
    fi
fi # Test the HDF5 library


#=============================
# Run Release snapshot, update version, and commit to cvs and tag
#=============================
if [ "$cmd" = "all" -o -n "$cmdrel" ]; then
    if [ "$snapshot" = "yes" ]; then
	(cd ${CURRENT} && ${MAKE} distclean)
	(
	    # Turn on exit on error in the sub-shell so that it does not
	    # cvs commit if errors encounter here.
	    set -e
	    cd ${CURRENT}
	    bin/release -d $ARCHIVES $METHODS
	    RELEASE_VERSION="`perl bin/h5vers -v`"
	    perl bin/h5vers -i
	    cvs -Q commit -m "Snapshot $RELEASE_VERSION"
	)
	errcode=$?
    fi

    # Replace the previous version with the current version.
    # Should check if the errcode of the release process but there
    # are other failures after release was done (e.g. h5vers or cvs failures)
    # that should allow the replacement to occure.
    rm -rf ${PREVIOUS}
    mv ${CURRENT} ${PREVIOUS}
fi #Release snapshot


#=============================
# Clean the test area.  Default is no clean.
#=============================
if [ -n "$cmdclean" ]; then
    # setup if srcdir is used.
    if [ -z "$srcdir" ]; then
	TESTDIR=${CURRENT}
    else
	case "$SRCDIRNAME" in
	"")
	    SRCDIRNAME=$HOSTNAME
	    ;;
	-*)
	    SRCDIRNAME="$HOSTNAME$SRCDIRNAME"
	    ;;
	esac
	TESTDIR=${BASEDIR}/TestDir/${SRCDIRNAME}
    fi
    # Make sure current version exists and is clean
    if [ -d ${TESTDIR} ]; then
	(cd ${TESTDIR} && ${MAKE} $cmdclean )
    else
	errcode=$?
        snapshot=no
        exit $errcode
    fi
fi # Clean the Test directory

exit $errcode