loadaliases

# vim:ft=sh

#-------------------------------------------------------------------------
# Copyright 2009 Rufus Cable
# 
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
# 
#     http://www.apache.org/licenses/LICENSE-2.0
# 
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#-------------------------------------------------------------------------

function usage() {
    script_name=$(basename $0)
    aliases_dir=$(dirname "${script_name}")/aliases
    cat <<END_OF_USAGE
$script_name

This script sets up bash aliases from the directory
$aliases_dir.

Each alias name is taken from the filename and the
alias content is taken from the file content.

The script must be sourced rather than executed:

 . $script_name
END_OF_USAGE
}

# Find this script's name
script_name=${BASH_ARGV[0]}

# Exit if we're not being sourced
if [ "$_" == "$script_name" ]; then
    usage && exit 1
fi

# Find aliases directory alongside this script
aliases_dir=$(dirname "${script_name}")/aliases

# Load aliases from directory if present
if [ -d "$aliases_dir" ]; then
    # Look at all non-empty alias files
    for alias_file in $aliases_dir/*; do
        if [ -s $alias_file ]; then

            # The alias is named after the file
            alias_name=$(basename $alias_file)

            # and the alias content is the file content
            alias_command=$(cat $alias_file)

            # set the alias (is there a nicer way to do this?)
            eval "alias $alias_name='$alias_command'"
        fi
    done
fi