Bash Magic Env

Environment loader/unload er for bash, that automagically updates the environment as you change directories.

Why?

Bash and emacs are my IDE (and "desktop"), and the amount of junk I have loaded at any one time has grown to unmanageable levels. Ideally, this should limit many things to only the specific project that needed them.

Instructions

Just source the file into your bash environment, and set variables in a .magic_env located in the directory hey should be active. The variables will be loaded when you cd to the directory, and unloaded when you leave.

If yo make a file called .magic_env.unload in the same directory, it will be sourced into the shell at the beginning of the unload process.

Unfortunately, it's still a prototype

The above description is of only limited use at th emoment, as I haven't written one of the more important features yet: recursive detection of the .magic_env files up directory tree, towards root.

It needs to load the environmen whenever you are in the specific directory, or any of it's subdirectories, recursively. This behavior would be very similar to how git finds the .git directory for a project.

Furthermore, this would let you describe envrironments in a heirarchy, loading more than one .magic_env at a time when the trees overlap.

"But...overriding 'cd' is dangrous!"

Yes, it is. It's also convenient at the moment. What has to happen is that the _magic_env_update function must be called at least once every directory change (more is ok).

I plan on using something like this, eventually, instead of cd(){...} as currently used:

    PROMPT_COMMAND="_magic_env_update ; ${PROMPT_COMMAND}"

Settings

See the comments at the top of the script.

Copyright

Copyright 2012 Brent Sanders

GPL-3, See COPYING for details.

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, either version 3 of the License, or (at your option) any later version.

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 GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see http://www.gnu.org/licenses/.