51 lines
1.9 KiB
Markdown
51 lines
1.9 KiB
Markdown
## File resolution
|
|
|
|
`mach-nix` uses [nix-pypi-fetcher](https://github.com/DavHau/nix-pypi-fetcher) to translate package versions to URLs and hashes.
|
|
|
|
For example, the declaration "package pillow + version 9.1.0 + python 3.9 + linux" resolves to
|
|
|
|
```json
|
|
"Pillow-9.1.0-cp39-cp39-manylinux_2_17_x86_64.manylinux2014_x86_64.whl": [
|
|
"gig6+ZwcOluh2kTGcpbVqtGfEcU1tVGlrlUyijF84zE=",
|
|
"cp39"
|
|
],
|
|
```
|
|
|
|
The wheel URL is constructed in [pypi-crawlers/src/crawl_wheel_deps.py](pypi-crawlers/src/crawl_wheel_deps.py)
|
|
|
|
```py
|
|
def construct_url(name, pyver, filename: str):
|
|
base_url = "https://files.pythonhosted.org/packages/"
|
|
return f"{base_url}{pyver}/{name[0]}/{name}/{filename}"
|
|
```
|
|
|
|
So in this example, the full URL would be
|
|
|
|
```
|
|
https://files.pythonhosted.org/packages/cp39/p/pillow/Pillow-9.1.0-cp39-cp39-manylinux_2_17_x86_64.manylinux2014_x86_64.whl
|
|
```
|
|
|
|
Now `mach-nix` can call Nix's `fetchurl` like
|
|
|
|
```nix
|
|
builtins.fetchurl {
|
|
url = "https://files.pythonhosted.org/packages/cp39/p/pillow/Pillow-9.1.0-cp39-cp39-manylinux_2_17_x86_64.manylinux2014_x86_64.whl";
|
|
sha256 = "gig6+ZwcOluh2kTGcpbVqtGfEcU1tVGlrlUyijF84zE=";
|
|
}
|
|
```
|
|
|
|
... and Nix will download the wheel file to `/nix/store`
|
|
|
|
```console
|
|
$ unzip -l /nix/store/7gbbbrsqkw7f69axyh818abh9yw45fnb-Pillow-9.1.0-cp39-cp39-manylinux_2_17_x86_64.manylinux2014_x86_64.whl | head
|
|
Archive: /nix/store/7gbbbrsqkw7f69axyh818abh9yw45fnb-Pillow-9.1.0-cp39-cp39-manylinux_2_17_x86_64.manylinux2014_x86_64.whl
|
|
Length Date Time Name
|
|
--------- ---------- ----- ----
|
|
0 04-01-2022 10:08 PIL/
|
|
0 04-01-2022 10:08 Pillow.libs/
|
|
0 04-01-2022 10:08 Pillow-9.1.0.dist-info/
|
|
7311 04-01-2022 10:08 PIL/PdfImagePlugin.py
|
|
141328 04-01-2022 10:08 PIL/_imagingcms.cpython-39-x86_64-linux-gnu.so
|
|
46872 04-01-2022 10:08 PIL/_imagingtk.cpython-39-x86_64-linux-gnu.so
|
|
1513 04-01-2022 10:08 PIL/GribStubImagePlugin.py
|
|
```
|