deprecate pip install --no-install / pip install --no-download

[qwcode]

@dstufft, if we want to move away from static build dirs to mkdtemp dirs, then best to formally deprecate pip install --no-install / pip install --no-download in v1.5, so we can do so (and moreover do all of #906) in v1.6 or later.

[dstufft]

Let's do it. Static build dirs have caused a lot of problems.

[qwcode]

well, I guess normally a deprecation includes an FYI on what the alternative is, but we don't have those yet

E.g. for pip install --no-install, the alternative will be pip unpack as mentioned in #906 (and the replacement for pip install --no-download will be pip install somepath\* , which is not documented atm, and may have bugs) .

Given that, should we wait?

[dstufft]

We can wait if you think it's appropriate, however I'm not sure if there should be an alternative but I'll move that discussion over to the other ticket.

[qwcode]

If we wait, then it's 2 cycles before we can move to mkdtemp build dirs, because --no-install / --no-download is what's blocking that. I'll go ahead and mark them as deprecated. I doubt many will notice or care that no alternative is mentioned atm.

[qwcode]

committed to 1.5.X 48f8c0a

[abloch]

what's the correct way to check what's about to be installed without installing it then?

[GreatBahram]

How do I get the list of package dependencies without installing it? it's a little bit weird to go for each package check it's a json. is there any better solution for this?

[lock]

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