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#! /usr/bin/python
"""See Docs.md"""
# %%
import re
from collections import defaultdict
from pathlib import Path
from subprocess import check_output
def rustfmt(code: str) -> str:
return check_output(["rustfmt", "--emit=stdout"], input=code, text=True)
# %%
# Read nodes
root = Path(
check_output(["git", "rev-parse", "--show-toplevel"], text=True).strip(),
)
nodes_file = (
root.joinpath("crates")
.joinpath("ruff_python_ast")
.joinpath("src")
.joinpath("node.rs")
.read_text()
)
node_lines = (
nodes_file.split("pub enum AnyNode {")[1].split("}")[0].strip().splitlines()
)
nodes = [
node_line.split("(")[1].split(")")[0].split("::")[-1].split("<")[0]
for node_line in node_lines
]
print(nodes)
# %%
# Generate newtypes with dummy FormatNodeRule implementations
out = (
root.joinpath("crates")
.joinpath("ruff_python_formatter")
.joinpath("src")
.joinpath("generated.rs")
)
src = root.joinpath("crates").joinpath("ruff_python_formatter").joinpath("src")
nodes_grouped = defaultdict(list)
# We rename because mod is a keyword in rust
groups = {
"mod": "module",
"expr": "expression",
"stmt": "statement",
"pattern": "pattern",
"type_param": "type_param",
"other": "other",
}
def group_for_node(node: str) -> str:
for group in groups:
if node.startswith(group.title().replace("_", "")):
return group
else:
return "other"
def to_camel_case(node: str) -> str:
"""Converts PascalCase to camel_case"""
return re.sub("([A-Z])", r"_\1", node).lower().lstrip("_")
for node in nodes:
nodes_grouped[group_for_node(node)].append(node)
for group, group_nodes in nodes_grouped.items():
# These conflict with the manually content of the mod.rs files
# src.joinpath(groups[group]).mkdir(exist_ok=True)
# mod_section = "\n".join(
# f"pub(crate) mod {to_camel_case(node)};" for node in group_nodes
# )
# src.joinpath(groups[group]).joinpath("mod.rs").write_text(rustfmt(mod_section))
for node in group_nodes:
node_path = src.joinpath(groups[group]).joinpath(f"{to_camel_case(node)}.rs")
# Don't override existing manual implementations
if node_path.exists():
continue
code = f"""
use ruff_formatter::write;
use ruff_python_ast::{node};
use crate::verbatim_text;
use crate::prelude::*;
#[derive(Default)]
pub struct Format{node};
impl FormatNodeRule<{node}> for Format{node} {{
fn fmt_fields(&self, item: &{node}, f: &mut PyFormatter) -> FormatResult<()> {{
write!(f, [verbatim_text(item)])
}}
}}
""".strip() # noqa: E501
node_path.write_text(rustfmt(code))
# %%
# Generate `FormatRule`, `AsFormat` and `IntoFormat`
generated = """//! This is a generated file. Don't modify it by hand! Run `crates/ruff_python_formatter/generate.py` to re-generate the file.
#![allow(unknown_lints, clippy::default_constructed_unit_structs)]
use crate::context::PyFormatContext;
use crate::{AsFormat, FormatNodeRule, IntoFormat, PyFormatter};
use ruff_formatter::{FormatOwnedWithRule, FormatRefWithRule, FormatResult, FormatRule};
use ruff_python_ast as ast;
""" # noqa: E501
for node in nodes:
text = f"""
impl FormatRule<ast::{node}, PyFormatContext<'_>>
for crate::{groups[group_for_node(node)]}::{to_camel_case(node)}::Format{node}
{{
#[inline]
fn fmt(
&self,
node: &ast::{node},
f: &mut PyFormatter,
) -> FormatResult<()> {{
FormatNodeRule::<ast::{node}>::fmt(self, node, f)
}}
}}
impl<'ast> AsFormat<PyFormatContext<'ast>> for ast::{node} {{
type Format<'a> = FormatRefWithRule<
'a,
ast::{node},
crate::{groups[group_for_node(node)]}::{to_camel_case(node)}::Format{node},
PyFormatContext<'ast>,
>;
fn format(&self) -> Self::Format<'_> {{
FormatRefWithRule::new(
self,
crate::{groups[group_for_node(node)]}::{to_camel_case(node)}::Format{node}::default(),
)
}}
}}
impl<'ast> IntoFormat<PyFormatContext<'ast>> for ast::{node} {{
type Format = FormatOwnedWithRule<
ast::{node},
crate::{groups[group_for_node(node)]}::{to_camel_case(node)}::Format{node},
PyFormatContext<'ast>,
>;
fn into_format(self) -> Self::Format {{
FormatOwnedWithRule::new(
self,
crate::{groups[group_for_node(node)]}::{to_camel_case(node)}::Format{node}::default(),
)
}}
}}
""" # noqa: E501
generated += text
out.write_text(rustfmt(generated))
|
