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from __future__ import annotations
import ast
import json
import re
from pathlib import Path
from typing import Any
from . import scm
class ToolsError(Exception):
pass
class ValidationError(ToolsError):
pass
class InvalidVersionError(ToolsError):
pass
class MissingVariableError(ToolsError):
pass
class AbortExecutionError(Exception):
@staticmethod
def _strip(txt):
txt = txt or ""
txt = txt[1:] if txt.startswith("\n") else txt
txt = indent(txt, pre="")
return txt[:-1] if txt.endswith("\n") else txt
def __init__(
self, message: str, explain: str | None = None, hint: str | None = None
):
self.message = message.strip()
self._explain = explain
self._hint = hint
@property
def explain(self):
return self._strip(self._explain)
@property
def hint(self):
return self._strip(self._hint)
def __str__(self):
result = [self.message]
if self.explain:
result.append(indent("\n" + self.explain, pre=" " * 2)[2:])
if self.hint:
result.extend(["\nhint:", indent("\n" + self.hint, pre=" " * 2)[2:]])
return "".join(result)
def urmtree(path: Path):
"universal (win|*nix) rmtree"
from os import name
from shutil import rmtree
from stat import S_IWUSR
if name == "nt":
for p in path.rglob("*"):
p.chmod(S_IWUSR)
rmtree(path, ignore_errors=True)
if path.exists():
raise RuntimeError(f"cannot remove {path=}")
def indent(txt: str, pre: str = " " * 2) -> str:
"simple text indentation"
from textwrap import dedent
txt = dedent(txt)
if txt.endswith("\n"):
last_eol = "\n"
txt = txt[:-1]
else:
last_eol = ""
result = pre + txt.replace("\n", "\n" + pre) + last_eol
return result if result.strip() else result.strip()
def list_of_paths(paths: str | Path | list[str | Path]) -> list[Path]:
return [Path(s) for s in ([paths] if isinstance(paths, (str, Path)) else paths)]
def get_module_var(
path: Path | str, var: str = "__version__", abort=True
) -> str | None:
"""extract from a python module in path the module level <var> variable
Args:
path (str,Path): python module file to parse using ast (no code-execution)
var (str): module level variable name to extract
abort (bool): raise MissingVariable if var is not present
Returns:
None or str: the variable value if found or None
Raises:
MissingVariable: if the var is not found and abort is True
Notes:
this uses ast to parse path, so it doesn't load the module
"""
class V(ast.NodeVisitor):
def __init__(self, keys):
self.keys = keys
self.result = {}
def visit_Module(self, node): # noqa: N802
# we extract the module level variables
for subnode in ast.iter_child_nodes(node):
if not isinstance(subnode, ast.Assign):
continue
for target in subnode.targets:
if target.id not in self.keys:
continue
if not isinstance(subnode.value, (ast.Num, ast.Str, ast.Constant)):
raise ValidationError(
f"cannot extract non Constant variable "
f"{target.id} ({type(subnode.value)})"
)
if isinstance(subnode.value, ast.Str):
value = subnode.value.s
elif isinstance(subnode.value, ast.Num):
value = subnode.value.n
else:
value = subnode.value.value
self.result[target.id] = value
return self.generic_visit(node)
v = V({var})
path = Path(path)
if path.exists():
tree = ast.parse(Path(path).read_text())
v.visit(tree)
if var not in v.result and abort:
raise MissingVariableError(f"cannot find {var} in {path}", path, var)
return v.result.get(var, None)
def set_module_var(
path: str | Path, var: str, value: Any, create: bool = True
) -> tuple[Any, str]:
"""replace var in path with value
Args:
path (str,Path): python module file to parse
var (str): module level variable name to extract
value (None or Any): if not None replace var in initfile
create (bool): create path if not present
Returns:
(str, str) the (<previous-var-value|None>, <the new text>)
"""
# module level var
expr = re.compile(f"^{var}\\s*=\\s*['\\\"](?P<value>[^\\\"']*)['\\\"]")
fixed = None
lines = []
src = Path(path)
if not src.exists() and create:
src.parent.mkdir(parents=True, exist_ok=True)
src.touch()
input_lines = src.read_text().split("\n")
for line in reversed(input_lines):
if fixed:
lines.append(line)
continue
match = expr.search(line)
if match:
fixed = match.group("value")
if value is not None:
x, y = match.span(1)
line = line[:x] + value + line[y:]
lines.append(line)
txt = "\n".join(reversed(lines))
if not fixed and create:
if txt and txt[-1] != "\n":
txt += "\n"
txt += f'{var} = "{value}"'
with Path(path).open("w") as fp:
fp.write(txt)
return fixed, txt
def bump_version(version: str, mode: str) -> str:
"""given a version str will bump it according to mode
Arguments:
version: text in the N.M.O form
mode: major, minor or micro
Returns:
increased text
>>> bump_version("1.0.3", "micro")
"1.0.4"
>>> bump_version("1.0.3", "minor")
"1.1.0"
"""
newver = [int(n) for n in version.split(".")]
if mode == "major":
newver[-3] += 1
newver[-2] = 0
newver[-1] = 0
elif mode == "minor":
newver[-2] += 1
newver[-1] = 0
elif mode == "micro":
newver[-1] += 1
return ".".join(str(v) for v in newver)
def update_version(
initfile: str | Path, github_dump: str | None = None, abort: bool = True
) -> str | None:
"""extracts version information from github_dump and updates initfile in-place
Args:
initfile (str, Path): path to the __init__.py file with a __version__ variable
github_dump (str): the os.getenv("GITHUB_DUMP") value
Returns:
str: the new version for the package
"""
path = Path(initfile)
repo = scm.lookup(path)
if not (repo or github_dump):
if abort:
raise scm.InvalidGitRepoError(f"cannot find a valid git repo for {path}")
return get_module_var(path, "__version__")
if not github_dump and repo:
gdata = {
"ref": repo.head.name,
"sha": repo.head.target.hex[:7],
"run_number": 0,
}
dirty = bool(repo.status())
else:
gdata = json.loads(github_dump) if isinstance(github_dump, str) else github_dump
dirty = False
version = current = get_module_var(path, "__version__")
expr = re.compile(r"/(?P<what>beta|release)/(?P<version>\d+([.]\d+)*)$")
expr1 = re.compile(r"(?P<version>\d+([.]\d+)*)(?P<num>b\d+)?$")
if match := expr.search(gdata["ref"]):
# setuptools double calls the update_version,
# this fixes the issue
match1 = expr1.search(current or "")
if not match1:
raise InvalidVersionError(f"cannot parse current version '{current}'")
if match1.group("version") != match.group("version"):
raise InvalidVersionError(
f"building package for {current} from '{gdata['ref']}' "
f"branch ({match.groupdict()} mismatch {match1.groupdict()})"
)
if match.group("what") == "beta":
version = f"{match1.group('version')}b{gdata['run_number']}"
short = gdata["sha"] + ("*" if dirty else "")
set_module_var(path, "__version__", version)
set_module_var(path, "__hash__", short)
return version
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