# 
# Copyright (c) 2006 The Trustees of Indiana University and Indiana
#                    University Research and Technology
#                    Corporation.  All rights reserved.
# $COPYRIGHT$
# 
# Additional copyrights may follow
# 
# $HEADER$

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#
# Helpful defines
#
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# This is an OSCAR-specific RPM specfile.  It is only for installing a
# LAM-installation-agnostic modulefile that will automatically pick
# which of multiple LAM installations to use if a specific one is not
# asked for by the user.

# Values specified here are what are used if the user does not pass in
# any defaults.

%{!?oscar_prefix: %define oscar_prefix /opt/%{name}}

%define _prefix %{oscar_prefix}-%{version}
%define _pkgdatadir %{oscar_prefix}-%{version}/share/lam

# Defining these to nothing overrides the stupid automatic RH9
# functionality of making "debuginfo" RPMs.

%define debug_package %{nil}
%define __check_files %{nil}


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#
# Preamble Section
#
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Summary: OSCAR-specific modulefile for run-time picking of a LAM/MPI installation to use
Name: lam-switcher-modulefile
Version: LAMVERSION
Release: 1
Vendor: LAM/MPI Team
License: BSD
Group: Development/Libraries
Source: lam-switcher-modulefile.tcl
URL: http://www.lam-mpi.org/
BuildRoot: %{_tmppath}/%{name}-%{version}-root
Requires: %__rm %__mkdir %__sed %__mv %__chmod %__chown
Requires: modules-oscar
Requires: env-switcher

%description 
This RPM is used to install a LAM/MPI-installation-agnostic modulefile
that is used to automatically select which LAM/MPI installation to use
on a per-shell basis.  That is, if there are multiple LAM
installations on a single node (due to limitations in both OSCAR 3.0
and LAM/MPI 7.0.x design), it will attempt to pick the "right" one and
load the appropriate modulefile for that installation.  

Current possibilities include:
- plain vanilla LAM/MPI
- LAM/MPI with gm
- LAM/MPI with blcr
- LAM/MPI with blcr and gm

This RPM will be unnecessary when LAM/MPI 7.1 is released, and LAM's
support for external systems will not be hard-coded in libmpi and
liblam; they will be dynamically loaded at run-time via loadable
modules.

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#
# Prep Section
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%prep

# Nothing to do...


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#
# Build Section
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%build

cd "$RPM_BUILD_DIR"
%__mkdir -p %{name}-%{version}
%__chmod -R a+rX,g-w,o-w %{name}-%{version}
cd %{name}-%{version}

%__cp "$RPM_SOURCE_DIR/lam-switcher-modulefile.tcl" \
	"$RPM_BUILD_DIR/%{name}-%{version}/lam-%{version}"
%__chmod 644 "$RPM_BUILD_DIR/%{name}-%{version}/lam-%{version}"


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#
# Install Section
#
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%install
rm -rf "$RPM_BUILD_ROOT"

# Copy the shell script to pkgdatadir

pkgdatadir="$RPM_BUILD_ROOT/%{_pkgdatadir}"
%__mkdir -p "$pkgdatadir"
%__cp "$RPM_BUILD_DIR/%{name}-%{version}/lam-%{version}" \
	"$pkgdatadir/lam-%{version}"
%__chmod 644 "$pkgdatadir/lam-%{version}"


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#
# Clean Section
#
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%clean
%__rm -rf "$RPM_BUILD_ROOT"


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#
# Post (module) section
#
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%post

# Add ourselves into the switcher repository.  Run the modules and
# switcher setup scripts because this RPM install may be part of a
# massive "rpm -ivh ..." that includes the modules and switcher RPMs
# themselves -- in which case, the environment for those packages will
# not yet have been setup.

# In an ungrade situation, there will already be a lam-%{version}
# modulefile resigtered, so we have to unregister it first, and then
# do the registration.

if test "$1" \> 1; then
    switcher mpi --rm-name lam-%{version} --force --silent
fi

. /etc/profile.d/00-modules.sh
switcher mpi --add-name lam-%{version} %{_pkgdatadir} --force --silent


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#
# Preun (module) Section
#
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%preun

# Remove ourselves from the switcher repository.  Run the modules and
# switcher setup scripts because this RPM install may be part of the
# same shell that "rpm -ivh ..." the switcher/modules RPM's, in which
# case, the environment for those packages will not yet have been
# setup.  This is important to do *before* we are uninstalled because
# of the case where "rpm -Uvh lam-module..." is used; the current RPM
# will be uninstalled and then the new one will be installed.  If we
# are %postun here, then the new RPM will be installed, and then this
# will run, which will remove the [new] tag from switcher, which is
# obviously not what we want.

# Grrr...  It seems that "rpm -ivh a.rpm b.rpm c.rpm" is smart enough
# to re-order the order of installation to ensure that dependencies
# are met.  However, "rpm -e a b c" does *not* order the
# uninstallations to ensure that dependencies are still met.  So if
# someone does "rpm -e switcher modules lam-module", it is quite
# possible that rpm will uninstall switcher and/or modules *before*
# this RPM is uninstalled.  As such, the following lines will fail,
# which will cause all kinds of Badness.  Arrggh!!  So we have to test
# to ensure that these files are still here before we try to use them.

# If this is an upgrade, then we only want to do this when the last
# RPM is removed (i.e., when this is *not* an upgrade).

if test "$1" == 0; then
    a=/etc/profile.d/00-modules.sh
    which switcher > /dev/null 2> /dev/null
    b=$?
    if test -f $a -a "$b" = "0"; then
	. $a
	default="`switcher mpi --show --system | grep default | cut -d= -f2`"

	# If this RPM was the system default switcher module, then
	# both print a warning and remove the system default.

	if test "$default" = "lam-%{version}"; then
		echo "WARNING: This RPM was the default MPI implementation!"
		echo "WARNING: There is no NO DEFAULT MPI implementation!"
		switcher mpi = none --system --force --silent
	fi

	# Remove this module's name from the switcher repository

	switcher mpi --rm-name lam-%{version} --force --silent
    fi
fi


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#
# Files Section
#
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%files
%defattr(-,root,root)
%{_pkgdatadir}/lam-%{version}


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#
# Changelog
#
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%changelog
* Wed Dec 31 2003 Jeff Squyres <jsquyres@lam-mpi.rg>
- First version.  Hopefully, this RPM won't need to live very long
  because LAM/MPI 7.1 will obviate the need for it.