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Add UV_PYTHON_DOWNLOADS_JSON_URL to set custom managed python sources (#10939)

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## Summary

Add an option to overwrite the list of available Python downloads from a
local JSON file by using the environment variable
`UV_PYTHON_DOWNLOADS_JSON_URL`

as an experimental support for providing custom sources for Python
distribution binaries #8015

related #10203

I probably should make the JSON to be fetched from a remote URL instead
of a local file.
please let me know what you think and I will modify the code
accordingly.

## Test Plan

### normal run
```
root@75c66494ba8b:/# /code/target/release/uv python list
cpython-3.14.0a4+freethreaded-linux-x86_64-gnu    <download available>
cpython-3.14.0a4-linux-x86_64-gnu                 <download available>
cpython-3.13.1+freethreaded-linux-x86_64-gnu      <download available>
cpython-3.13.1-linux-x86_64-gnu                   <download available>
cpython-3.12.8-linux-x86_64-gnu                   <download available>
cpython-3.11.11-linux-x86_64-gnu                  <download available>
cpython-3.10.16-linux-x86_64-gnu                  <download available>
cpython-3.9.21-linux-x86_64-gnu                   <download available>
cpython-3.8.20-linux-x86_64-gnu                   <download available>
cpython-3.7.9-linux-x86_64-gnu                    <download available>
pypy-3.10.14-linux-x86_64-gnu                     <download available>
pypy-3.9.19-linux-x86_64-gnu                      <download available>
pypy-3.8.16-linux-x86_64-gnu                      <download available>
pypy-3.7.13-linux-x86_64-gnu                      <download available>
```

### empty JSON file
```sh
root@75c66494ba8b:/# export UV_PYTHON_DOWNLOADS_JSON_URL=/code/crates/uv-python/my-download-metadata.json 
root@75c66494ba8b:/# cat $UV_PYTHON_DOWNLOADS_JSON_URL 
{}
root@75c66494ba8b:/# /code/target/release/uv python list
root@75c66494ba8b:/# 
```

### JSON file with valid version
```sh
root@75c66494ba8b:/# export UV_PYTHON_DOWNLOADS_JSON_URL=/code/crates/uv-python/my-download-metadata.json 
root@75c66494ba8b:/# cat $UV_PYTHON_DOWNLOADS_JSON_URL 
{
  "cpython-3.11.9-linux-x86_64-gnu": {
    "name": "cpython",
    "arch": {
      "family": "x86_64",
      "variant": null
    },
    "os": "linux",
    "libc": "gnu",
    "major": 3,
    "minor": 11,
    "patch": 9,
    "prerelease": "",
    "url": "20240814/cpython-3.11.9%2B20240814-x86_64-unknown-linux-gnu-install_only_stripped.tar.gz",
    "sha256": "daa487c7e73005c4426ac393273117cf0e2dc4ab9b2eeda366e04cd00eea00c9",
    "variant": null
  }
}
root@75c66494ba8b:/# /code/target/release/uv python list
cpython-3.11.9-linux-x86_64-gnu    <download available>
root@75c66494ba8b:/# 
```

### Remote Path

```sh
root@75c66494ba8b:/# export UV_PYTHON_DOWNLOADS_JSON_URL=http://a.com/file.json 
root@75c66494ba8b:/# /code/target/release/uv python list
error: Remote python downloads JSON is not yet supported, please use a local path (without `file://` prefix)
```

---------

Co-authored-by: Aria Desires <aria.desires@gmail.com>
This commit is contained in:
Meitar Reihan 2025-04-07 20:55:00 +03:00 • committed by GitHub
parent c0ed5693a7
commit 2b62f73064
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15 changed files with 248 additions and 19303 deletions
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4
crates/uv-python/src/installation.rs
View file

@ -294,7 +294,7 @@ impl PythonInstallationKey {
}
}
fn new_from_version(
pub fn new_from_version(
implementation: LenientImplementationName,
version: &PythonVersion,
os: Os,
@ -482,6 +482,6 @@ impl Ord for PythonInstallationKey {
.then_with(|| self.os.to_string().cmp(&other.os.to_string()))
.then_with(|| self.arch.to_string().cmp(&other.arch.to_string()))
.then_with(|| self.libc.to_string().cmp(&other.libc.to_string()))
.then_with(|| self.variant.cmp(&other.variant))
.then_with(|| self.variant.cmp(&other.variant).reverse()) // we want Default to come first
}
}