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virtualenv and make DESTDIR=

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From: h.goe...@goebel-consult.de (Hartmut Goebel)
Newsgroups: comp.lang.python
Subject: virtualenv and make DESTDIR=
Date: Fri, 4 Mar 2022 14:03:50 +0100
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by: Hartmut Goebel - Fri, 4 Mar 2022 13:03 UTC

Hi,

How can I make installing a virtual environment honor DESTDIR? How can I
install a virtual environment in $(DESTDIR)$(PREFIX), which behaves as
being set-up in $(PREFIX)? (Of course, this virtual environment can not
be used. My aim is to ship it as part of a rpm package)

In Makefiles is good practice to honor DESTDIR in the "install" target,
like this

install:
install -t $(DESTDIR)$(PREFIX)/bin build/bin/my-tool

Now when running

python3 -m venv $(DESTDIR)$(PREFIX)

all paths in this virtual environment refer to $(DESTDIR)$(PREFIX)
instead of just $$(PREFIX)

Any ideas?

Background:

More about DESTDIR:
https://www.gnu.org/prep/standards/html_node/DESTDIR.html

Following Redhat's commendations, I want to install my (somewhat
complex) software into /opt/my-software. To make it easier for users to
use the software, my idea was to setup a virtual environment in
/opt/my-software. Thus users can easily use /opt/my-software/bin/python
and have the library provided by my-software available. My Software also
includes some scripts, which will also reside in /opt/my-software/bin
and refer to /opt/my-software/bin/python. This will avoid to require
users to set up PYTHONPATH when thy want to use MY Software.

--
Schönen Gruß
Hartmut Goebel
Dipl.-Informatiker (univ), CISSP, CSSLP, ISO 27001 Lead Implementer
Information Security Management, Security Governance, Secure Software
Development

Goebel Consult, Landshut
http://www.goebel-consult.de

Blog: https://www.goe-con.de/blog/why-a-pki-is-barely-trustworthy
Kolumne:
https://www.goe-con.de/hartmut-goebel/cissp-gefluester/2011-11-in-troja-nichts-neues

Subject	Author
virtualenv and make DESTDIR=	Hartmut Goebel