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#!/usr/bin/env python3

"""Check proposed changes for common issues."""

import sys

import os.path

import subprocess

import sysconfig

def get_python_source_dir():

src_dir = sysconfig.get_config_var('abs_srcdir')

if not src_dir:

src_dir = sysconfig.get_config_var('srcdir')

return os.path.abspath(src_dir)

SRCDIR = get_python_source_dir()

def n_files_str(count):

"""Return 'N file(s)' with the proper plurality on 'file'."""

s = "s" if count != 1 else ""

return f"{count} file{s}"

def status(message, modal=False, info=None):

"""Decorator to output status info to stdout."""

def decorated_fxn(fxn):

def call_fxn(*args, **kwargs):

sys.stdout.write(message + ' ... ')

sys.stdout.flush()

result = fxn(*args, **kwargs)

if not modal and not info:

print("done")

elif info:

print(info(result))

else:

print("yes" if result else "NO")

return result

return call_fxn

return decorated_fxn

def get_git_branch():

"""Get the symbolic name for the current git branch"""

cmd = "git rev-parse --abbrev-ref HEAD".split()

try:

return subprocess.check_output(cmd,

stderr=subprocess.DEVNULL,

cwd=SRCDIR,

encoding='UTF-8')

except subprocess.CalledProcessError:

return None

def get_git_upstream_remote():

"""Get the remote name to use for upstream branches

Uses "upstream" if it exists, "origin" otherwise

"""

cmd = "git remote get-url upstream".split()

try:

subprocess.check_output(cmd,

stderr=subprocess.DEVNULL,

cwd=SRCDIR,

encoding='UTF-8')

except subprocess.CalledProcessError:

return "origin"

return "upstream"

def get_git_remote_default_branch(remote_name):

"""Get the name of the default branch for the given remote

It is typically called 'main', but may differ

"""

cmd = f"git remote show {remote_name}".split()

env = os.environ.copy()

env['LANG'] = 'C'

try:

remote_info = subprocess.check_output(cmd,

stderr=subprocess.DEVNULL,

cwd=SRCDIR,

encoding='UTF-8',

env=env)

except subprocess.CalledProcessError:

return None

for line in remote_info.splitlines():

if "HEAD branch:" in line:

base_branch = line.split(":")[1].strip()

return base_branch

return None

@status("Getting base branch for PR",

info=lambda x: x if x is not None else "not a PR branch")

def get_base_branch():

if not os.path.exists(os.path.join(SRCDIR, '.git')):

# Not a git checkout, so there's no base branch

return None

upstream_remote = get_git_upstream_remote()

version = sys.version_info

if version.releaselevel == 'alpha':

base_branch = get_git_remote_default_branch(upstream_remote)

else:

base_branch = "{0.major}.{0.minor}".format(version)

this_branch = get_git_branch()

if this_branch is None or this_branch == base_branch:

# Not on a git PR branch, so there's no base branch

return None

return upstream_remote + "/" + base_branch

@status("Getting the list of files that have been added/changed",

info=lambda x: n_files_str(len(x)))

def changed_files(base_branch=None):

"""Get the list of changed or added files from git."""

if os.path.exists(os.path.join(SRCDIR, '.git')):

# We just use an existence check here as:

# directory = normal git checkout/clone

# file = git worktree directory

if base_branch:

cmd = 'git diff --name-status ' + base_branch

else:

cmd = 'git status --porcelain'

filenames = []

with subprocess.Popen(cmd.split(),

stdout=subprocess.PIPE,

cwd=SRCDIR) as st:

git_file_status, _ = st.communicate()

if st.returncode != 0:

sys.exit(f'error running {cmd}')

for line in git_file_status.splitlines():

line = line.decode().rstrip()

status_text, filename = line.split(maxsplit=1)

status = set(status_text)

# modified, added or unmerged files

if not status.intersection('MAU'):

continue

if ' -> ' in filename:

# file is renamed

filename = filename.split(' -> ', 2)[1].strip()

filenames.append(filename)

else:

sys.exit('need a git checkout to get modified files')

return list(map(os.path.normpath, filenames))

@status("Docs modified", modal=True)

def docs_modified(file_paths):

"""Report if any file in the Doc directory has been changed."""

return bool(file_paths)

@status("Misc/ACKS updated", modal=True)

def credit_given(file_paths):

"""Check if Misc/ACKS has been changed."""

return os.path.join('Misc', 'ACKS') in file_paths

@status("Misc/NEWS.d updated with `blurb`", modal=True)

def reported_news(file_paths):

"""Check if Misc/NEWS.d has been changed."""

return any(p.startswith(os.path.join('Misc', 'NEWS.d', 'next'))

for p in file_paths)

@status("configure regenerated", modal=True, info=str)

def regenerated_configure(file_paths):

"""Check if configure has been regenerated."""

if 'configure.ac' in file_paths:

return "yes" if 'configure' in file_paths else "no"

else:

return "not needed"

@status("pyconfig.h.in regenerated", modal=True, info=str)

def regenerated_pyconfig_h_in(file_paths):

"""Check if pyconfig.h.in has been regenerated."""

if 'configure.ac' in file_paths:

return "yes" if 'pyconfig.h.in' in file_paths else "no"

else:

return "not needed"

def main():

base_branch = get_base_branch()

file_paths = changed_files(base_branch)

has_doc_files = any(fn for fn in file_paths if fn.startswith('Doc') and

fn.endswith(('.rst', '.inc')))

misc_files = {p for p in file_paths if p.startswith('Misc')}

# Docs updated.

docs_modified(has_doc_files)

# Misc/ACKS changed.

credit_given(misc_files)

# Misc/NEWS changed.

reported_news(misc_files)

# Regenerated configure, if necessary.

regenerated_configure(file_paths)

# Regenerated pyconfig.h.in, if necessary.

regenerated_pyconfig_h_in(file_paths)

# Test suite run and passed.

has_c_files = any(fn for fn in file_paths if fn.endswith(('.c', '.h')))

has_python_files = any(fn for fn in file_paths if fn.endswith('.py'))

print()

if has_c_files:

print("Did you run the test suite and check for refleaks?")

elif has_python_files:

print("Did you run the test suite?")

if __name__ == '__main__':

main()

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