Re: [PATCH] Buffer-local process environments

[Stephen Leake]

Augusto Stoffel <arstoffel@gmail.com> writes:

> Many languages and build tools rely on environment variables, so those
> variables are not global, but rather local to a project.  In Python, for
> instance, the standard way to choose a particular version of the
> interpreter and of various packages is by setting the PATH and perhaps
> PYTHONPATH variables.  It's a dumb and simple system, which has its
> advantages.

Ada has a similar situation; GPR_PROJECT_PATH specifies the path to
search for dependent libraries, and is per-project.

> If you are working on two projects with different requirements, you need
> to either launch an Emacs instance for each project, which is the
> pedestrian option, or have buffer-local environment variables.

The GNU ELPA package wisi takes an intermediate approach; it maintains a
list of project-specific environment variables in the project object,
and let-binds them in process-environment whenever it runs a process for
the project.

-- 
-- Stephe