Support PIP_INDEX_URL for setting pip index urls

[humanzz]

This is a request to support using alternative index urls - not just via the --index-url option - but also via the related pip environment variables

• PIP_INDEX_URL
• PIP_TRUSTED_HOST (to support none https schemes)

The use case I'm having is that I use a local pip server/proxy running on http://127.0.0.1:<port>/.... (This is to adhere to existing work policies/standards when using pip).

[marcelbischoff]

Also seeing 405s for a private PIP repo, probably worse a separate issue once I figure out more.

[zanieb]

We support PIP_INDEX_URL via UV_INDEX_URL — we won't support pip environment variables.

See #1339 for discussion around trusted host support.

[humanzz]

Thanks for the prompt response @zanieb.
Though not-ideal, I believe things can work with the UV_INDEX_URL.
I'll drop a comment on #1339 about PIP_TRUSTED_HOST to maybe have it supported via UV_TRUSTED_HOST.

[baggiponte]

+1! This is kinda smart. UV_* env cars should take precedence, but being able to understand PIP_* vars could drive adoption.

For example: a client I work with has to inject PIP_INDEX_URL as a Docker build arg. If I wanted to use UV in my images, I'd have to open a PR with the devops team just for that. Tough luck.

[teruokun]

Also +1 in general if the idea is to be a drop-in replacement for pip. I know pip supports an unwieldy number of command-line and configuration variables, so it's fine if the feature-set only matches what is reasonable forward-looking pip usage rather than the kitchen sink of legacy options, but if the goal is that I can take most reasonable pip commands and simply replace it with uv pip and have it usually work, that would be the best possible user experience OOTB.

[zanieb]

I've considered it some more and basically I don't see a problem supporting these where it's not too invasive. Ideally we'd support UV_INDEX_URL and PIP_INDEX_URL. I think some pip flags, like PIP_PREFER_BINARY, do not belong in our top level UV_* namespace so we'd either only support the pip variable or also have UV_PIP_..? I'm not sure — there are some open questions around this. There's also the discussion in #1657 which may complicate the naming of these variables.

I'd like to get consensus from other maintainers before work begins on this though. cc @charliermarsh

[david-waterworth]

Is UV_INDEX_URL already implemented? It doesn't appear to be working for me - I'm using AWS Code Artifact and set UV_INDEX_URL=PIP_INDEX_URL then tried to install uv pip install torch --verbose, the messages imply it's still uisng pypi.org

uv_installer::downloader::download total=2
   uv_installer::downloader::get_wheel name=torch==2.2.1, size=Some(755527312), url="https://files.pythonhosted.org/packages/a7/ad/fbe7d4cffb76da4e478438853b51305361c719cff929ab70a808e7fb75e7/torch-2.2.1-cp310-cp310-manylinux1_x86_64.whl"
     uv_distribution::distribution_database::get_or_build_wheel dist=Built(Registry(RegistryBuiltDist { filename: WheelFilename { name: PackageName("torch"), version: "2.2.1", python_tag: ["cp310"], abi_tag: ["cp310"], platform_tag: ["manylinux1_x86_64"] }, file: File { dist_info_metadata: Some(Hashes(Hashes { md5: None, sha256: Some("e562543ed257f1ebd1ec5abf008dee10394cc142113816cd9536d1d0d61ce46c") })), filename: "torch-2.2.1-cp310-cp310-manylinux1_x86_64.whl", hashes: Hashes { md5: None, sha256: Some("8d3bad336dd2c93c6bcb3268e8e9876185bda50ebde325ef211fb565c7d15273") }, requires_python: Some(VersionSpecifiers([VersionSpecifier { operator: GreaterThanEqual, version: "3.8.0" }])), size: Some(755527312), upload_time_utc_ms: Some(1708629418225), url: AbsoluteUrl("https://files.pythonhosted.org/packages/a7/ad/fbe7d4cffb76da4e478438853b51305361c719cff929ab70a808e7fb75e7/torch-2.2.1-cp310-cp310-manylinux1_x86_64.whl"), yanked: Some(Bool(false)) }, index: Pypi(VerbatimUrl { url: Url { scheme: "https", cannot_be_a_base: false, username: "", password: None, host: Some(Domain("pypi.org")), port: None, path: "/simple", query: None, fragment: None }, given: None }) }))
       uv_client::cached_client::get_serde 
         uv_client::cached_client::get_cacheable 
           uv_client::cached_client::read_and_parse_cache file=/home/dave/.cache/uv/wheels-v0/pypi/torch/torch-2.2.1-cp310-cp310-manylinux1_x86_64.http

[charliermarsh]

Yup -- I ran UV_INDEX_URL=https://test.pypi.org/simple cargo run pip install requests --refresh --reinstall --verbose and see:

 uv_resolver::resolver::process_request request=Prefetch requests *
 uv_client::cached_client::from_path_sync path="/Users/crmarsh/Library/Caches/uv/simple-v3/e8208120cae3ba69/requests.rkyv"
          0.144222s   0ms DEBUG uv_client::cached_client Found stale response for: https://test.pypi.org/simple/requests/
          0.144244s   0ms DEBUG uv_client::cached_client Sending revalidation request for: https://test.pypi.org/simple/requests/
       uv_client::cached_client::revalidation_request url="https://test.pypi.org/simple/requests/"
          0.250039s 106ms DEBUG uv_client::cached_client Found not-modified response for: https://test.pypi.org/simple/requests/
       uv_client::cached_client::refresh_cache file=/Users/crmarsh/Library/Caches/uv/simple-v3/e8208120cae3ba69/requests.rkyv
...
 uv_installer::downloader::download total=1
   uv_installer::downloader::get_wheel name=requests==2.5.4.1, size=Some(468942), url="https://test-files.pythonhosted.org/packages/6d/00/8ed1b6ea43b10bfe28d08e6af29fd6aa5d8dab5e45ead9394a6268a2d2ec/requests-2.5.4.1-py2.py3-none-any.whl"
     uv_distribution::distribution_database::get_or_build_wheel dist=Built(Registry(RegistryBuiltDist { filename: WheelFilename { name: PackageName("requests"), version: "2.5.4.1", python_tag: ["py2", "py3"], abi_tag: ["none"], platform_tag: ["any"] }, file: File { dist_info_metadata: Some(Hashes(Hashes { md5: None, sha256: Some("9f5d3a2d16cc59a5bb12d972cd8a46bd7f2ee620f2501c8fd561fa104658fc51") })), filename: "requests-2.5.4.1-py2.py3-none-any.whl", hashes: Hashes { md5: None, sha256: Some("0a2c98e46121e7507afb0edc89d342641a1fb9e8d56f7d592d4975ee6b685f9a") }, requires_python: None, size: Some(468942), upload_time_utc_ms: Some(1426282195769), url: AbsoluteUrl("https://test-files.pythonhosted.org/packages/6d/00/8ed1b6ea43b10bfe28d08e6af29fd6aa5d8dab5e45ead9394a6268a2d2ec/requests-2.5.4.1-py2.py3-none-any.whl"), yanked: Some(Bool(false)) }, index: Url(VerbatimUrl { url: Url { scheme: "https", cannot_be_a_base: false, username: "", password: None, host: Some(Domain("test.pypi.org")), port: None, path: "/simple", query: None, fragment: None }, given: Some("https://test.pypi.org/simple") }) }))

[zanieb]

Yes UV_INDEX_URL is implemented. Have you tried using export? Can you echo $UV_INDEX_URL to confirm it's set?

[david-waterworth]

Yes it's exported and I tried echo,

echo $UV_INDEX_URL
https://[email protected]/pypi/XXX/simple/

(uv version is 0.1.14)

[david-waterworth]

Ahh no sorry it wasn't exported, it works now thanks!

[morotti]

Hello, any update on this issue?

It would be really helpful for uv adoption if uv could understand PIP_INDEX_URL out of the box. :)

[copdips]

for people who are using PIP_INDEX_URL, in bash, we can achieve this by declare -n UV_INDEX_URL=PIP_INDEX_URL.
This will make sure UV_INDEX_URL always takes the current value of PIP_INDEX_URL

[zanieb]

Thanks @copdips

I don't think we'll support reading pip variables — we support UV_INDEX_URL and UV_EXTRA_INDEX_URL.