alias bash profiles based on client names

README.md

Say you support multiple clients or multiple projects but don't want everything on your shell at once. This script in your .bashrc file will allow you to automatically create aliases for any directory that has it's own .bashrc file. It starts a new bash shell so no existing variables are overwritten and you can exit when needed.

For example, say you have project or client named superx and another named johndoe. You create a directory superx and johndoe. Within each you pust a custom .bashrc file and optional .superx-secrets and .johndoe-secrets file and then your shell (upon next login) will detect those files and alias them to the parent directory's name. So if I want superx stuff, I just run superx and vice versa for johndoe.

Some references:

http://docs.aws.amazon.com/cli/latest/userguide/cli-chap-getting-started.html#cli-environment http://www.linuxjournal.com/content/tech-tip-dereference-variable-names-inside-bash-functions http://stackoverflow.com/questions/3601515/how-to-check-if-a-variable-is-set-in-bash

client_alias.sh

UnsetThenSetVariable() {
    if [ ! -z ${1+x} ]; then
      eval unset ${1}
    fi
    eval export ${1}=${2}
}
InitShellAlias () {
	ALIAS="bash --init-file <(echo \". /etc/profile;. $HOME/.bash_profile;$(if [[ -f $1 ]]; then echo '. '$1';';fi)"
}
DynamicAlias () {
	[[ ! -z ${ALIAS} ]] && alias $(echo $1)="${ALIAS}$([[ ! -z $2 ]] && echo "cd $2;")\")"
}
# CLIENT ALIASES
ROOT_DIRS=$(find $HOME -maxdepth 1 ! -path . -type d ! -path $HOME'/.*' -print | tr '\n' ' ')
for path in $ROOT_DIRS; do
        ALIAS=
        FULL_PATH=$(cd ${path}; pwd)
        [[ -f ${FULL_PATH}/.bashrc ]] && InitShellAlias ${FULL_PATH}/.bashrc
        [[ -f ${FULL_PATH}/.$(basename ${path})-secrets ]] && ALIAS="${ALIAS}. ${FULL_PATH}/.$(basename ${path})-secrets;"
        DynamicAlias $(basename ${path})
done
# END CLIENT ALIASES


# PROJECT ALIASES
ProjectAlias () {
	ALIAS=
	InitShellAlias $2
	DynamicAlias $1 $3
}

# END PROJECT ALIASES

ProjectAlias myproject $HOME/some/python/virtualenv/bin/activate $HOME/path/to/myproject

superx_home_.bashrc

HOME_VAR=`basename $(dirname $( readlink -f ${BASH_SOURCE[0]}))`_HOME
eval export ${HOME_VAR}="$(dirname $( readlink -f ${BASH_SOURCE[0]}))"
parent_dir=`basename ${!HOME_VAR}`
command -v deactivate >/dev/null 2>&1 && deactivate
python_dir=${HOME}/python/${parent_dir}
if [ -d "${python_dir}" ]; then 
	. ${python_dir}/bin/activate
	PATH=$PATH:${python_dir}/bin
        if [ -f "${python_dir}/bin/aws_completer" ]; then
		complete -C "${python_dir}/bin/aws_completer" aws
	fi
fi
cd ${!HOME_VAR}

superx_home_.superx-secrets

UnsetThenSetVariable AWS_ACCESS_KEY_ID AKIAIOSFODNN7EXAMPLE
UnsetThenSetVariable AWS_SECRET_ACCESS_KEY 'wJalrXUtnFEMI/K7MDENG/bPxRfiCYEXAMPLEKEY'
UnsetThenSetVariable AWS_DEFAULT_REGION us-east-1