Re: pip installing scripts into another virtualenv

Isn't virtualenv's default behavior to install pip automatically when
a virtualenv is created?
https://virtualenv.pypa.io/en/stable/userguide/#usage
(That is, I don't think you need to "force" pip to be installed, but
rather simply rely on default behavior.)

--Chris


On Fri, Sep 14, 2018 at 12:50 AM, Alex Becker <[email protected]> wrote:
> The main downside to invoking pip in the virtualenv is that it means I have
> to have pip installed within the virtualenv, which is something I haven't
> wanted to commit to in the interest of creating slim virtualenvs for
> bundling with apps. But you are probably right and I need to accept that.
>
> On Fri, Sep 14, 2018 at 12:43 AM Chris Jerdonek <[email protected]>
> wrote:
>>
>> Yes, why not simply invoke the pip installed in the virtualenv into
>> which you want to install the packages? It doesn't seem like you'd
>> need to "re-architect" anything insomuch as simply change "pip" in
>> your argument list to the path to the pip inside the virtualenv you're
>> targeting.
>>
>> --Chris
>>
>> On Fri, Sep 14, 2018 at 12:15 AM, Alex Becker <[email protected]>
>> wrote:
>> > As part of a package management tool, I'm trying to use pip to install
>> > python packages into a virtualenv, from python code (via subprocess),
>> > into a
>> > different virtualenv than the virtualenv my python process is running in
>> > (if
>> > any). I have this *mostly* working with:
>> >
>> > pip install --prefix [virtualenv-path] --ignore-installed
>> > --no-build-isolation
>> >
>> > However, installed scripts break because the scrips automatically get
>> > prepended with a shebang pointing to the python interpreter pip was run
>> > under.
>> >
>> > Is there a way around this behavior? Am I crazy to even try to install
>> > into
>> > a different virtualenv? Or do I have to re-architect my code to call pip
>> > in
>> > the target virtualenv (which may require me forcing pip to be installed,
>> > depending on what versions of python I choose to support)?
>> >
>> > Sincerely,
>> >
>> > Alex Becker
>> >
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>> >
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