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"""Generate inline stubs for generic functions on func
"""
# mypy: ignore-errors
from __future__ import annotations
import inspect
import re
from tempfile import NamedTemporaryFile
import textwrap
from sqlalchemy.sql.functions import _registry
from sqlalchemy.types import TypeEngine
from sqlalchemy.util.tool_support import code_writer_cmd
def _fns_in_deterministic_order():
reg = _registry["_default"]
for key in sorted(reg):
yield key, reg[key]
def process_functions(filename: str, cmd: code_writer_cmd) -> str:
with NamedTemporaryFile(
mode="w",
delete=False,
suffix=".py",
) as buf, open(filename) as orig_py:
indent = ""
in_block = False
for line in orig_py:
m = re.match(
r"^( *)# START GENERATED FUNCTION ACCESSORS",
line,
)
if m:
in_block = True
buf.write(line)
indent = m.group(1)
buf.write(
textwrap.indent(
"""
# code within this block is **programmatically,
# statically generated** by tools/generate_sql_functions.py
""",
indent,
)
)
builtins = set(dir(__builtins__))
for key, fn_class in _fns_in_deterministic_order():
is_reserved_word = key in builtins
guess_its_generic = bool(fn_class.__parameters__)
buf.write(
textwrap.indent(
f"""
@property
def {key}(self) -> Type[{fn_class.__name__}{
'[Any]' if guess_its_generic else ''
}]:{
' # noqa: A001' if is_reserved_word else ''
}
...
""",
indent,
)
)
m = re.match(
r"^( *)# START GENERATED FUNCTION TYPING TESTS",
line,
)
if m:
in_block = True
buf.write(line)
indent = m.group(1)
buf.write(
textwrap.indent(
"""
# code within this block is **programmatically,
# statically generated** by tools/generate_sql_functions.py
""",
indent,
)
)
count = 0
for key, fn_class in _fns_in_deterministic_order():
if hasattr(fn_class, "type") and isinstance(
fn_class.type, TypeEngine
):
python_type = fn_class.type.python_type
python_expr = rf"Tuple\[.*{python_type.__name__}\]"
argspec = inspect.getfullargspec(fn_class)
args = ", ".join(
'column("x")' for elem in argspec.args[1:]
)
count += 1
buf.write(
textwrap.indent(
rf"""
stmt{count} = select(func.{key}({args}))
# EXPECTED_RE_TYPE: .*Select\[{python_expr}\]
reveal_type(stmt{count})
""",
indent,
)
)
if in_block and line.startswith(
f"{indent}# END GENERATED FUNCTION"
):
in_block = False
if not in_block:
buf.write(line)
return buf.name
def main(cmd: code_writer_cmd) -> None:
for path in [functions_py, test_functions_py]:
destination_path = path
tempfile = process_functions(destination_path, cmd)
cmd.run_zimports(tempfile)
cmd.run_black(tempfile)
cmd.write_output_file_from_tempfile(tempfile, destination_path)
functions_py = "lib/sqlalchemy/sql/functions.py"
test_functions_py = "test/ext/mypy/plain_files/functions.py"
if __name__ == "__main__":
cmd = code_writer_cmd(__file__)
with cmd.run_program():
main(cmd)
|
