#!/bin/sh
# snapshot: Snap shot testing command script for HDF4.
# This script should be run nightly from cron.  It checks out hdf4
# from the source repository and compares it against the previous
# snapshot.  If anything significant changed, it is build and tested.
# After the test passes and if snapshot release is desired, a new snapshot
# is created, the minor version number is incremented, and the change is
# checked back into the source repository.

# function definitions
TIMESTAMP()
{
    echo "=====" "$1": "`date`" "====="
}

EXIT_BANNER()
{
TIMESTAMP "Exit $PROGNAME with status=$?"
}

# Show current total disk usage.
DISKUSAGE()
{
    du -ks | \
    ( read x y; echo "Disk Usage=$x KB" )
}


# MAIN
# SGI /bin/sh replaces $0 as function name if used in a function.
# Set the name here to avoid that ambiguity and better style too.
PROGNAME=$0

echo "====================================="
echo "$PROGNAME $*"
echo "====================================="
TIMESTAMP MAIN
uname -a

# setup exit banner message
trap EXIT_BANNER 0

# Dump environment variables before option parsing
echo ===Dumping environment variables before option parsing ===
printenv | sort
echo ===Done Dumping environment variables before option parsing ===

# 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/hdf4/snapshots
# Default relative to $BASEDIR.
ARCHIVES_default=../release_dir
ARCHIVES=$ARCHIVES_default

# Where is the zlib library?
# At NCSA, half of the machines have it in /usr/lib, the other half at
# /usr/ncsa/lib.  Leave it unset.
ZLIB_default=
ZLIB=$ZLIB_default

# What compression methods to use?
METHODS="gzip bzip2 md5"

# Hard set to gmake.
# No parallel make (-j) because dependences are not set correctly for it.
# Must use gmake for --srcdir support.
MAKE=gmake
export MAKE

#
# 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=""
	    ;;
	deploy)
	    # deploy the built binary.
	    shift
	    if [ $# -lt 1 ]; then
		echo "deploy <dir> missing"
		errcode=1
		cmd="help"
		break
	    fi
	    cmddeploy="deploy"
	    DEPLOYDIRNAME="$1"
	    ;;
	deploydir)
	    # default directory for deployment.
	    shift
	    if [ $# -lt 1 ]; then
		echo "deploydir <dir> missing"
		errcode=1
		cmd="help"
		break
	    fi
	    deploydir="$1"
	    ;;
	test)
	    cmdtest="test"
	    cmd=""
	    ;;
        setenv)
            # set environment variable
            shift
            eval $1="$2"
            export $1
            shift
            ;;
        setenvN)
            # set environment variable with $1 values
            # e.g., setenvN 3 x a b c is same as setenv x="a b c".
            # a kludge now--the extra single quotes are needed
            # else eval complains.
            shift
            envN=$1
            shift
            envname=$1
            envalue=
            while test $envN -gt 0; do
                shift
                envalue="$envalue $1"
                envN=`expr $envN - 1`
            done
            eval $envname="'$envalue'"
            export $envname
            ;;
	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
	    ;;
	echo)
	    set -x
	    break
	    ;;
	zlib)
	    shift
	    if [ $# -lt 1 ]; then
		echo "ZLIB information missing"
		errcode=1
		cmd="help"
		break
	    fi
	    ZLIB="$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

# Dump environment variables after option parsing
echo ===Dumping environment variables after option parsing ===
printenv | sort
echo ===Done Dumping environment variables after option parsing ===

if [ "$cmd" = help ]; then
    set -
    cat <<EOF
Usage: $PROGNAME [all] [checkout] [diff] [test] [srcdir] [release] [help]
	[clean] [distclean] [echo] [deploy <dir>] [deploydir <dir>]
	[zlib <zlib_path>] [archive <arch_path>] [srcdirname <dir>]
	[op-configure <option>] [--<option>]
    all:      Run all commands (checkout, test & release)
              [Default is all]
    checkout: Run source checkout
    diff:     Run diff on current and previous versions.  Exit 0 if
              no significant differences are found.  Otherwise, non-zero.
    deploy:   deploy binary to directory <dir>
    deploydir: use <dir> as the default directory for deployment
    test:     Run test
    release:  Run release
    clean:    Run make clean
    distclean:Run make distclean
    setenv <name> <value>:
              Set environment variable <name> to <value>.
    setenvN <N> <name> <value> ...:
              Set environment variable with <N> values.
              E.g., setenvN 3 x a b c is same as setenv x="a b c".
    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
    echo:     Turn on shell echo
    zlib <zlib_path>:
              Use <zlib_path> as the ZLIB locations
              [Default is $ZLIB_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-zlib) to use zlib library
# provide ZLIB is non-empty.
ZLIB=${ZLIB:+"--with-zlib="$ZLIB}
CONFIGURE="./configure $ZLIB $OP_CONFIGURE"

# Execute the requests
snapshot=yes

H4VERSION=hdf4
BASEDIR=${HOME}/snapshots-${H4VERSION}
CURRENT=${BASEDIR}/current
PREVIOUS=${BASEDIR}/previous
ARCHIVES=${ARCHIVES:=${ARCHIVES_default}}
HOSTNAME=`hostname | cut -f1 -d.`	# no domain part
if [ $H4VERSION != hdf4 ]; then
    SVNVERSION="hdf4/branches/$H4VERSION"
else
    SVNVERSION=hdf4/trunk		# use the default (trunk) 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 source checkout
#=============================
if [ "$cmd" = "all" -o -n "$cmdcheckout" ]; then
    TIMESTAMP "checkout"
    # 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)

    SVNROOT=https://svn.hdfgroup.uiuc.edu
    # Check out the current version from source repository.
    (cd $BASEDIR; svn -q co ${SVNROOT}/${SVNVERSION} current ) || exit 1
fi # Do source checkout


#=============================
# Run Test the HDF4 library
#=============================
if [ "$cmd" = "all" -o -n "$cmdtest" -o -n "$cmddiff" ]; then
    TIMESTAMP "diff"
    # setup if srcdir is used.
    if [ -z "$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

    # Make sure all the tests work.
    # No uninstall target.  Use "rm -rf ..." for now.
    if [ "$snapshot" = "yes" ]; then
	if (cd ${TESTDIR} && \
	    TIMESTAMP "configure" && \
	    ${srcdir:+${CURRENT}/}${CONFIGURE} --prefix=$INSTALLDIR && \
	    TIMESTAMP "make" && \
	    ${MAKE} && \
	    TIMESTAMP "check" && \
	    ${MAKE} check && \
	    TIMESTAMP "install" && \
	    ${MAKE} install && \
	    TIMESTAMP "installcheck" && \
	    ${MAKE} installcheck && \
	    TIMESTAMP "uninstall" && \
	    rm -rf $INSTALLDIR ); then
	    :
	else
	    errcode=$?
	    snapshot=no
	    exit $errcode
	fi
    fi
fi # Test the HDF4 library


#=============================
# Run deployment if requested.
#=============================
if [ -n "$DEPLOYDIRNAME" ]; then
    if [ "$snapshot" = "yes" ]; then
	TIMESTAMP "deploy"
	if (cd ${TESTDIR} && \
            ${CURRENT}/bin/deploy ${deploydir}/${DEPLOYDIRNAME} && \
            TIMESTAMP "clean" && \
            ${MAKE} clean && \
            TIMESTAMP "installcheck prefix=${deploydir}/${DEPLOYDIRNAME}" && \
            ${MAKE} installcheck prefix=${deploydir}/${DEPLOYDIRNAME}); then
	    errcode=$?
	    exit $errcode
	fi
    fi
fi # Deploy


#=============================
# Run Release snapshot, update version, and commit to source repository
#=============================
if [ "$cmd" = "all" -o -n "$cmdrel" ]; then
    if [ "$snapshot" = "yes" ]; then
	TIMESTAMP "release"
	(cd ${CURRENT} && ${MAKE} distclean)
	(
	    # Turn on exit on error in the sub-shell so that it does not
	    # commit source if errors encounter here.
	    set -e
	    cd ${CURRENT}
	    RELEASE_VERSION="`perl bin/h4vers -v`"
	    bin/release -d $ARCHIVES $METHODS
	    perl bin/h4vers -i
	    svn -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. h4vers or svn 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 "$cmdclean" ]; then
    TIMESTAMP "clean"
    # setup if srcdir is used.
    if [ -z "$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