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|
#!/bin/sh
#
# BLIS
# An object-based framework for developing high-performance BLAS-like
# libraries.
#
# Copyright (C) 2014, The University of Texas at Austin
#
# 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(s) of the copyright holder(s) 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.
#
#
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 " Recursively descends through the directory given in argument 1 while"
echo " creating a symmetric directory structure in the new directory specified"
echo " by argument 2, ignoring regular files along the way."
echo " "
echo " Usage:"
echo " ${script_name} [-v] existing_dir new_mirror_dir"
echo " "
echo " The following options are accepted:"
echo " "
echo " -v verbose"
echo " Echo progress as directories are recursively created."
echo " "
# Exit with non-zero exit status
exit 1
}
main()
{
# Process our command line options. We only respond to the -v flag,
# in which case we'll echo what we're doing as we go along.
while getopts ":v" opt; do
case $opt in
v ) verbose_flag=1 ;;
\? ) print_usage
exit 1
esac
done
shift $(($OPTIND - 1))
# Check the number of arguments after command line option processing.
if [ $# != "2" ]; then
print_usage
fi
# Extract arguments.
e_dir=$1
n_dir=$2
# If the root new directory does not exist, then create it.
if [ ! -d $n_dir ]; then
# Be verbose, if -v was one of the command line options.
if [ -n "$verbose_flag" ]; then
echo "Creating $n_dir"
fi
# Make the root new directory. Create the parent directories if
# they do not exist with the -p option.
mkdir -p $n_dir
fi
# Initialize the recursive variables. We keep a separate variable
# for the existing and new directories because they have different
# roots, but they will always change in parallel.
cur_e_dir=$e_dir
cur_n_dir=$n_dir
# Begin recursion, starting with the contents of the existing
# directory.
mirror_tree "$(ls $e_dir)"
# Exit peacefully.
return 0
}
mirror_tree()
{
# Extract arguments.
dir_contents="$1"
# Process each item in our argument list (ie: each item in cur_e_dir).
for thing in ${dir_contents}; do
# Adjust the current existing and new directory paths to
# include the current instance of thing.
cur_e_dir="$cur_e_dir/$thing"
cur_n_dir="$cur_n_dir/$thing"
# If the current existing directory exists, then create a
# corresponding subdirectory in new directory.
if [ -d ${cur_e_dir} ]; then
# Be verbose, if -v was one of the command line options.
if [ -n "$verbose_flag" ]; then
echo "Creating $cur_n_dir"
fi
# Make the new subdirectory, but only if it doesn't
# already exist.
if [ ! -d $cur_n_dir ]; then
mkdir $cur_n_dir
fi
# Continue recursively on the contents of cur_e_dir.
mirror_tree "$(ls $cur_e_dir)"
fi
# Delete the end of the path, up to the first / character to
# prepare for the next "thing" in $@.
cur_e_dir=${cur_e_dir%/*}
cur_n_dir=${cur_n_dir%/*}
done
}
# The script's main entry point, passing all parameters given.
main "$@"
|
