Unable to resolve the spec `apache-airflow[all]`

[notatallshaw]

A good requirement to test any resolver against is apache-airflow[all], rip currently throws an error:

$ cargo r -- "apache-airflow[all]"
    Finished dev [unoptimized + debuginfo] target(s) in 0.07s
     Running `target/debug/rip 'apache-airflow[all]'`
thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value:   × Failed parsing requirement string "azure-datalake-store (>=0.0.45azure-mgmt-datalake-store>=0.5.0) ; extra == 'all'")
  ╰─▶ error at 1:56: expected one of "!", ")", "*", "+", ",", "-", ".", "_", letter or digit
', crates/rattler_installs_packages/src/resolve.rs:257:18
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

[baszalmstra]

Thanks! I'll take a look!

[baszalmstra]

We took a closer look at the issue and its because apache-airflow ==1.2.11 contains invalid metadata:

...
Requires-Dist: azure-datalake-store (>=0.0.45azure-mgmt-datalake-store>=0.5.0) ; extra == 'azure_data_lake'
...

We error on this case but pip seems to ignore invalid requirements when resolving:

https://github.com/pypa/pip/blob/2ba5acc8a4772ca1dc0d62a2dfe8967af28649d6/src/pip/_internal/resolution/resolvelib/factory.py#L392

#31 mimics this behavior. However, apache-airflow[all] is still unsolvable because we don't take sdists into account (this is the same output as pip):

|-- apache-airflow 1.10.3 | 1.10.4 | 1.10.5 | 1.10.6 | 1.10.7 | 1.10.8 | 1.10.9 | 1.10.10 | 1.10.12 | 1.10.14 | 1.10.15 | 2.0.0 | 2.0.1 | 2.0.2 | 2.1.0 | 2.1.1 | 2.1.2 | 2.1.3 | 2.1.4 | 2.2.0 |
  │ 2.2.1 | 2.2.2 | 2.2.3 | 2.2.4 | 2.2.5 | 2.3.0 | 2.3.1 | 2.3.2 | 2.3.3 | 2.3.4 | 2.4.0 | 2.4.1 | 2.4.2 | 2.4.3 | 2.5.0 | 2.5.1 | 2.5.2 | 2.5.3 | 2.6.0 | 2.6.1 | 2.6.2 | 2.6.3 | 2.7.0 | 2.7.1 would
  │ require
  │     |-- cron-descriptor >= 1.2.24, for which no candidates were found.

cron-descriptor does not provide any wheels for any matching version.

[wolfv]

Shouldn't we keep this open until we have some form of sdist support?

[baszalmstra]

I added

• Feat: support sdists #32