Adding dotkit support to TAU.

- New spack.hooks package
  - contains modules with pre and post install hooks

- New dotkit hook module
  - generates/removes dotkits on install/uninstall

- New spack use, spack unuse commands
  - use same syntax as install/uninstall

- New setup-env.bash script
  - Sets up path, dotkit support

- new spack dotkit command
  - used by script to parse specs, generate
    specs of installed pckages for dotkit file names

share/spack/setup-env.bash

@@ -0,0 +1,132 @@
+##############################################################################
+# Copyright (c) 2013, Lawrence Livermore National Security, LLC.
+# Produced at the Lawrence Livermore National Laboratory.
+#
+# This file is part of Spack.
+# Written by Todd Gamblin, tgamblin@llnl.gov, All rights reserved.
+# LLNL-CODE-647188
+#
+# For details, see https://scalability-llnl.github.io/spack
+# Please also see the LICENSE file for our notice and the LGPL.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License (as published by
+# the Free Software Foundation) version 2.1 dated February 1999.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the IMPLIED WARRANTY OF
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the terms and
+# conditions of the GNU General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with this program; if not, write to the Free Software Foundation,
+# Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+##############################################################################
+
+#
+#
+# This file is part of Spack and sets up the spack environment for
+# bash shells.  This includes dotkit support as well as putting spack
+# in your path.  Source it like this:
+#
+#    . /path/to/spack/share/spack/setup-env.bash
+#
+#
+
+
+########################################################################
+# This is a wrapper around the spack command that forwards calls to
+# 'spack use' and 'spack unuse' to shell functions.  This in turn
+# allows them to be used to invoke dotkit functions.
+#
+# 'spack use' is smarter than just 'use' because it converts its
+# arguments into a unique spack spec that is then passed to dotkit
+# commands.  This allows the user to use packages without knowing all
+# their installation details.
+#
+# e.g., rather than requring a full spec for libelf, the user can type:
+#
+#     spack use libelf
+#
+# This will first find the available libelf dotkits and use a
+# matching one.  If there are two versions of libelf, the user would
+# need to be more specific, e.g.:
+#
+#     spack use libelf@0.8.13
+#
+# This is very similar to how regular spack commands work and it
+# avoids the need to come up with a user-friendly naming scheme for
+# spack dotfiles.
+########################################################################
+function spack {
+    _spack_subcommand=$1; shift
+    _spack_spec="$@"
+
+    # Filter out use and unuse.  For any other commands, just run the
+    # command.
+    case $_spack_subcommand in
+        "use") ;;
+        "unuse") ;;
+        *)
+            command spack $_spack_subcommand "$@"
+            return
+            ;;
+    esac
+
+    # If no args or -h, just run that command as well.
+    if [ -z "$1" -o "$1" = "-h" ]; then
+        command spack $_spack_subcommand -h
+        return
+    fi
+
+    # Shift any other args for use off before parsing spec.
+    _spack_use_args=""
+    if [[ "$1" =~ ^- ]]; then
+        _spack_use_args="$1"; shift
+        _spack_spec="$@"
+    fi
+
+    # Here the user has run use or unuse with a spec.  Find a matching
+    # spec with a dotkit using spack dotkit, then use or unuse the
+    # result.  If spack dotkit comes back with an error, do nothing.
+    if _spack_full_spec=$(command spack dotkit $_spack_spec); then
+        $_spack_subcommand $_spack_use_args $_spack_full_spec
+    fi
+}
+
+########################################################################
+# Prepends directories to path, if they exist.
+#      pathadd /path/to/dir            # add to PATH
+# or   pathadd OTHERPATH /path/to/dir  # add to OTHERPATH
+########################################################################
+function _spack_pathadd {
+    # If no variable name is supplied, just append to PATH
+    # otherwise append to that variable.
+    varname=PATH
+    path="$1"
+    if [ -n "$2" ]; then
+        varname="$1"
+        path="$2"
+    fi
+
+    # Do the actual prepending here.
+    eval "oldvalue=\"\$$varname\""
+    if [ -d "$path" ] && [[ ":$oldvalue:" != *":$path:"* ]]; then
+        if [ -n "$oldvalue" ]; then
+            eval "export $varname=\"$path:$oldvalue\""
+        else
+            export $varname="$path"
+        fi
+    fi
+}
+
+
+#
+# Set up dotkit and path in the user environment
+#
+_spack_share_dir="$(dirname ${BASH_SOURCE[0]})"
+_spack_prefix="$(dirname $(dirname $_spack_share_dir))"
+
+_spack_pathadd DK_NODE "$_spack_share_dir/dotkit"
+_spack_pathadd PATH    "$_spack_prefix/bin"
+