f22c8ab811
Add a lint rule to detect if a name is definitely or possibly undefined
at a given usage.
If I create the file `undef/main.py` with contents:
```python
x = int
def foo():
z
return x
if flag:
y = x
y
```
And then run `cargo run --bin red_knot -- --current-directory
../ruff-examples/undef`, I get the output:
```
Name 'z' used when not defined.
Name 'flag' used when not defined.
Name 'y' used when possibly not defined.
```
If I modify the file to add `y = 0` at the top, red-knot re-checks it
and I get the new output:
```
Name 'z' used when not defined.
Name 'flag' used when not defined.
```
Note that `int` is not flagged, since it's a builtin, and `return x` in
the function scope is not flagged, since it refers to the global `x`.
34 lines
827 B
TOML
34 lines
827 B
TOML
[package]
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name = "red_knot_python_semantic"
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version = "0.0.0"
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publish = false
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authors = { workspace = true }
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edition = { workspace = true }
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rust-version = { workspace = true }
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homepage = { workspace = true }
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documentation = { workspace = true }
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repository = { workspace = true }
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license = { workspace = true }
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[dependencies]
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red_knot_module_resolver = { workspace = true }
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ruff_db = { workspace = true }
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ruff_index = { workspace = true }
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ruff_python_ast = { workspace = true }
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ruff_text_size = { workspace = true }
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bitflags = { workspace = true }
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ordermap = { workspace = true }
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salsa = { workspace = true }
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tracing = { workspace = true }
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rustc-hash = { workspace = true }
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hashbrown = { workspace = true }
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[dev-dependencies]
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anyhow = { workspace = true }
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ruff_python_parser = { workspace = true }
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[lints]
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workspace = true
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