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A Clojure library designed to make working with environment variables easier.
For security purposes, we have made masking of value display the default
behavior. If you want to see the value of a variable, simply add
:masked? false to everything that you don't want to mask.
Say you want to define a binding in a namespace that is filled in by the value specified in an environment variable. Here's the very simplest way to do it:
(require '[defenv.core :refer [defenv]]) (defenv path)
Then, if you run
@path you will see the value of the
PATH environment variable.
The project documentation contains much more example usage.
Also, you could try running
DEFENV_TESTING=bob lein usage
Questions I imagined you might ask
Why does `defenv` make delayed bindings?
Well, the project contains a bit of other magic. If you don't make a binding to a variable optional, an exception will be thrown when it is dereferenced if it isn't set. We don't want these exceptions to be thrown during compile time. Therefore, they must be delayed.
Why can't I load property files and declare multiple environments in my `project.clj` and stuff?
This library was designed for https://12factor.net/ apps
Copyright © 2021 Stephen Starkey
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/>.