This adds support for providing conflicting group names in addition to
extra names to `Conflicts`.
This merely makes "room" for it in the types while keeping everything
working. We'll add proper support for it in the next commit.
Note that one interesting trick we do here is depend directly on
`hashbrown` so that we can make use of its `Equivalent` trait. This in
turn lets us use things like `ConflictItemRef` as a lookup key for a
hashset that contains `ConflictItem`. This mirrors using a `&str` as a
lookup key for a hashset that contains `String`, but works for arbitrary
types. `std` doesn't support this, but `hashbrown` does. This trick in
turn lets us simplify some of our data structures.
This also rejiggers some of the serde-interaction with the conflicting
types. We now use a wire type to represent our conflicting items for
more flexibility. i.e., Support `extra` XOR `group` fields.
Since this is intended to support _both_ groups and extras, it doesn't
make sense to just name it for groups. And since there isn't really a
word that encapsulates both "extra" and "group," we just fall back to
the super general "conflicts."
We'll rename the variables and other things in the next commit.
This PR adds support for conflicting extras. For example, consider
some optional dependencies like this:
```toml
[project.optional-dependencies]
project1 = ["numpy==1.26.3"]
project2 = ["numpy==1.26.4"]
```
These dependency specifications are not compatible with one another.
And if you ask uv to lock these, you'll get an unresolvable error.
With this PR, you can now add this to your `pyproject.toml` to get
around this:
```toml
[tool.uv]
conflicting-groups = [
[
{ package = "project", extra = "project1" },
{ package = "project", extra = "project2" },
],
]
```
This will make the universal resolver create additional forks
internally that keep the dependencies from the `project1` and
`project2` extras separate. And we make all of this work by reporting
an error at **install** time if one tries to install with two or more
extras that have been declared as conflicting. (If we didn't do this,
it would be possible to try and install two different versions of the
same package into the same environment.)
This PR does *not* add support for conflicting **groups**, but it is
intended to add support in a follow-up PR.
Closes#6981Fixes#8024
Ref #6729, Ref #6830
This should also hopefully unblock
https://github.com/dagster-io/dagster/pull/23814, but in my testing, I
did run into other problems (specifically, with `pywin`). But it does
resolve the problem with incompatible dependencies in two different
extras once you declare `test-airflow-1` and `test-airflow-2` as
conflicting for `dagster-airflow`.
NOTE: This PR doesn't make `conflicting-groups` public yet. And in a
follow-up PR, I plan to switch the name to `conflicts` instead of
`conflicting-groups`, since it will be able to accept conflicting extras
_and_ conflicting groups.
## Summary
This PR adds a first-class API for defining registry indexes, beyond our
existing `--index-url` and `--extra-index-url` setup.
Specifically, you now define indexes like so in a `uv.toml` or
`pyproject.toml` file:
```toml
[[tool.uv.index]]
name = "pytorch"
url = "https://download.pytorch.org/whl/cu121"
```
You can also provide indexes via `--index` and `UV_INDEX`, and override
the default index with `--default-index` and `UV_DEFAULT_INDEX`.
### Index priority
Indexes are prioritized in the order in which they're defined, such that
the first-defined index has highest priority.
Indexes are also inherited from parent configuration (e.g., the
user-level `uv.toml`), but are placed after any indexes in the current
project, matching our semantics for other array-based configuration
values.
You can mix `--index` and `--default-index` with the legacy
`--index-url` and `--extra-index-url` settings; the latter two are
merely treated as unnamed `[[tool.uv.index]]` entries.
### Index pinning
If an index includes a name (which is optional), it can then be
referenced via `tool.uv.sources`:
```toml
[[tool.uv.index]]
name = "pytorch"
url = "https://download.pytorch.org/whl/cu121"
[tool.uv.sources]
torch = { index = "pytorch" }
```
If an index is marked as `explicit = true`, it can _only_ be used via
such references, and will never be searched implicitly:
```toml
[[tool.uv.index]]
name = "pytorch"
url = "https://download.pytorch.org/whl/cu121"
explicit = true
[tool.uv.sources]
torch = { index = "pytorch" }
```
Indexes defined outside of the current project (e.g., in the user-level
`uv.toml`) can _not_ be explicitly selected.
(As of now, we only support using a single index for a given
`tool.uv.sources` definition.)
### Default index
By default, we include PyPI as the default index. This remains true even
if the user defines a `[[tool.uv.index]]` -- PyPI is still used as a
fallback. You can mark an index as `default = true` to (1) disable the
use of PyPI, and (2) bump it to the bottom of the prioritized list, such
that it's used only if a package does not exist on a prior index:
```toml
[[tool.uv.index]]
name = "pytorch"
url = "https://download.pytorch.org/whl/cu121"
default = true
```
### Name reuse
If a name is reused, the higher-priority index with that name is used,
while the lower-priority indexes are ignored entirely.
For example, given:
```toml
[[tool.uv.index]]
name = "pytorch"
url = "https://download.pytorch.org/whl/cu121"
[[tool.uv.index]]
name = "pytorch"
url = "https://test.pypi.org/simple"
```
The `https://test.pypi.org/simple` index would be ignored entirely,
since it's lower-priority than `https://download.pytorch.org/whl/cu121`
but shares the same name.
Closes#171.
## Future work
- Users should be able to provide authentication for named indexes via
environment variables.
- `uv add` should automatically write `--index` entries to the
`pyproject.toml` file.
- Users should be able to provide multiple indexes for a given package,
stratified by platform:
```toml
[tool.uv.sources]
torch = [
{ index = "cpu", markers = "sys_platform == 'darwin'" },
{ index = "gpu", markers = "sys_platform != 'darwin'" },
]
```
- Users should be able to specify a proxy URL for a given index, to
avoid writing user-specific URLs to a lockfile:
```toml
[[tool.uv.index]]
name = "test"
url = "https://private.org/simple"
proxy = "http://<omitted>/pypi/simple"
```
As per
https://matklad.github.io/2021/02/27/delete-cargo-integration-tests.html
Before that, there were 91 separate integration tests binary.
(As discussed on Discord — I've done the `uv` crate, there's still a few
more commits coming before this is mergeable, and I want to see how it
performs in CI and locally).
