Added auto-detection of version string (via git).

Details:
- Added build/update-version-file.sh script for auto-detecting "version"
  string and updating 'version' file accordingly. (If .git directory is
  not present, then it is assumed this copy of BLIS is a downloaded
  release, in which case 'version' file is left unchanged.)
- Added invocation of update-version-file.sh to configure script.

build/gen-make-frags/gen-make-frag.sh

@@ -470,7 +470,7 @@ main()
 	fi
 
 	# If an output script name was given, overwrite script_name with it.
-	if [ -n ${output_name} ]; then
+	if [ -n "${output_name}" ]; then
 		script_name="${output_name}"
 	fi
 

build/update-version-file.sh

@@ -0,0 +1,175 @@
+#!/bin/bash
+#
+#  BLIS    
+#  An object-based framework for developing high-performance BLAS-like
+#  libraries.
+#
+#  Copyright (C) 2012, The University of Texas
+#
+#  Redistribution and use in source and binary forms, with or without
+#  modification, are permitted provided that the following conditions are
+#  met:
+#   - Redistributions of source code must retain the above copyright
+#     notice, this list of conditions and the following disclaimer.
+#   - Redistributions in binary form must reproduce the above copyright
+#     notice, this list of conditions and the following disclaimer in the
+#     documentation and/or other materials provided with the distribution.
+#   - Neither the name of The University of Texas nor the names of its
+#     contributors may be used to endorse or promote products derived
+#     from this software without specific prior written permission.
+#
+#  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+#  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+#  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+#  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+#  HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+#  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+#  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+#  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+#  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+#  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+#  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#
+#
+
+#
+# update-version-file.sh
+#
+# Field G. Van Zee
+#
+
+
+print_usage()
+{
+	#local script_name
+
+	# Get the script name
+	#script_name=${0##*/}
+
+	# Echo usage info
+	echo " "
+	echo " "$script_name
+	echo " "
+	echo " Field G. Van Zee"
+	echo " "
+	echo " Checks whether the current BLIS distribution is a git clone: if so,"
+	echo " it queries git to update the 'version' file with the latest version"
+	echo " string; otherwise, leaves the contents of 'version' unchanged."
+	echo " "
+	echo " Usage:"
+	echo "   ${script_name} [options] versfile"
+	echo " "
+	echo " Arguments:"
+	echo " "
+	echo "   versfile    The file where the version string is stored. If versfile is"
+	echo "               is not specified, then it defaults to 'version'."
+	echo " "
+	echo " Options:"
+	echo " "
+	echo "   -o SCRIPT   output script name"
+	echo "                 Use SCRIPT when outputting messages instead of the script's"
+	echo "                 actual name."
+	echo " "
+
+	# Exit with non-zero exit status
+	exit 1
+}
+
+
+main()
+{
+	# -- BEGIN GLOBAL VARIABLE DECLARATIONS --
+
+	# The name of the script, stripped of any preceeding path.
+	script_name=${0##*/}
+
+	# The name of the default version file.
+	version_file_def='version'
+
+	# The name of the specified version file.
+	version_file=''
+
+	# Strings used during version query.
+	git_describe_str=''
+	new_version_str=''
+
+	# The script name to use instead of the $0 when outputting messages.
+	output_name=''
+
+	# The git directory.
+	gitdir='.git'
+
+	# -- END GLOBAL VARIABLE DECLARATIONS --
+
+
+	# Process our command line options.
+	while getopts ":ho:" opt; do
+		case $opt in
+			o  ) output_name=$OPTARG ;;
+			h  ) print_usage ;;
+			\? ) print_usage
+		esac
+	done
+	shift $(($OPTIND - 1))
+
+
+	# If an output script name was given, overwrite script_name with it.
+	if [ -n "${output_name}" ]; then
+
+		script_name="${output_name}"
+	fi
+
+
+	echo "${script_name}: checking whether we need to update the version file."
+
+
+
+	# Check the number of arguments after command line option processing.
+	if [ $# = "0" ]; then
+
+		version_file=${version_file_def}
+		echo "${script_name}: not sure which version file to update; defaulting to '${version_file}'."
+
+	elif [ $# = "1" ]; then
+
+		version_file=$1
+		echo "${script_name}: checking version file '${version_file}'."
+
+	else
+		print_usage
+	fi
+
+
+	# Check if the .git dir exists; if it does not, we do nothing.
+	if [ -d "${gitdir}" ]; then
+
+		echo "${script_name}: found ${gitdir} directory; assuming git clone."
+
+		echo "${script_name}: executing git describe --tags."
+
+		# Query git for the version string, which is simply the current tag,
+		# followed by a number signifying how many commits have transpired
+		# since the tag, followed by a 'g' and a shortened hash tab.
+		git_describe_str=$(git describe --tags)
+
+		echo "${script_name}: got back ${git_describe_str}."
+
+		# Strip off the commit hash label.
+		new_version_str=$(echo ${git_describe_str} | cut -d- -f-2)
+
+		echo "${script_name}: truncating to ${new_version_str}."
+		echo "${script_name}: updating version file '${version_file}'."
+
+		# Write the new version string to the version file.
+		echo "${new_version_str}" > ${version_file}
+
+	fi
+
+
+	# Exit peacefully.
+	return 0
+}
+
+
+# The script's main entry point, passing all parameters given.
+main "$@"

configure

@@ -98,6 +98,9 @@ main()
 	# Path to 'mirror-tree.sh' script.
 	mirror_tree_sh="./${build_dir}/mirror-tree.sh"
 
+	# Path to 'update-version-file.sh' script.
+	update_version_file_sh="./${build_dir}/update-version-file.sh"
+
 	# The root directory of the BLIS framework.
 	frame_dir='frame'
 	frame_path="./${frame_dir}"
@@ -123,6 +126,10 @@ main()
 	prefix_flag=''
 
 
+	# Check whether we need to update the version file.
+	${update_version_file_sh} -o "${script_name}" "./${version_file}"
+
+
 	# Query which version of BLIS this is.
 	version=$(cat "${version_file}")
 
@@ -167,10 +174,10 @@ main()
 	# Set the install prefix if it was not already set when parsing the install
 	# prefix flag.
 	if [ -n "${prefix_flag}" ]; then
-		echo "${script_name}: detected -p option; using install prefix ${install_prefix}."
+		echo "${script_name}: detected -p option; using install prefix '${install_prefix}'."
 	else
 		install_prefix="${install_prefix_def}"
-		echo "${script_name}: no install prefix given; defaulting to ${install_prefix}."
+		echo "${script_name}: no install prefix given; defaulting to '${install_prefix}'."
 	fi
 
 	# Insert escape characters into path.

version

@@ -1 +1 @@
-0.1-alpha-0
+0.0.0-1