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from __future__ import annotations
import os.path
import re
from wheel.cli import WheelError
from wheel.wheelfile import WheelFile
DIST_INFO_RE = re.compile(r"^(?P<namever>(?P<name>.+?)-(?P<ver>\d.*?))\.dist-info$")
BUILD_NUM_RE = re.compile(rb"Build: (\d\w*)$")
def pack(directory: str, dest_dir: str, build_number: str | None):
"""Repack a previously unpacked wheel directory into a new wheel file.
The .dist-info/WHEEL file must contain one or more tags so that the target
wheel file name can be determined.
:param directory: The unpacked wheel directory
:param dest_dir: Destination directory (defaults to the current directory)
"""
# Find the .dist-info directory
dist_info_dirs = [
fn
for fn in os.listdir(directory)
if os.path.isdir(os.path.join(directory, fn)) and DIST_INFO_RE.match(fn)
]
if len(dist_info_dirs) > 1:
raise WheelError(f"Multiple .dist-info directories found in {directory}")
elif not dist_info_dirs:
raise WheelError(f"No .dist-info directories found in {directory}")
# Determine the target wheel filename
dist_info_dir = dist_info_dirs[0]
name_version = DIST_INFO_RE.match(dist_info_dir).group("namever")
# Read the tags and the existing build number from .dist-info/WHEEL
existing_build_number = None
wheel_file_path = os.path.join(directory, dist_info_dir, "WHEEL")
with open(wheel_file_path, "rb") as f:
tags, existing_build_number = read_tags(f.read())
if not tags:
raise WheelError(
"No tags present in {}/WHEEL; cannot determine target wheel "
"filename".format(dist_info_dir)
)
# Set the wheel file name and add/replace/remove the Build tag in .dist-info/WHEEL
build_number = build_number if build_number is not None else existing_build_number
if build_number is not None:
if build_number:
name_version += "-" + build_number
if build_number != existing_build_number:
with open(wheel_file_path, "rb+") as f:
wheel_file_content = f.read()
wheel_file_content = set_build_number(wheel_file_content, build_number)
f.seek(0)
f.truncate()
f.write(wheel_file_content)
# Reassemble the tags for the wheel file
tagline = compute_tagline(tags)
# Repack the wheel
wheel_path = os.path.join(dest_dir, f"{name_version}-{tagline}.whl")
with WheelFile(wheel_path, "w") as wf:
print(f"Repacking wheel as {wheel_path}...", end="", flush=True)
wf.write_files(directory)
print("OK")
def read_tags(input_str: bytes) -> tuple[list[str], str | None]:
"""Read tags from a string.
:param input_str: A string containing one or more tags, separated by spaces
:return: A list of tags and a list of build tags
"""
tags = []
existing_build_number = None
for line in input_str.splitlines():
if line.startswith(b"Tag: "):
tags.append(line.split(b" ")[1].rstrip().decode("ascii"))
elif line.startswith(b"Build: "):
existing_build_number = line.split(b" ")[1].rstrip().decode("ascii")
return tags, existing_build_number
def set_build_number(wheel_file_content: bytes, build_number: str | None) -> bytes:
"""Compute a build tag and add/replace/remove as necessary.
:param wheel_file_content: The contents of .dist-info/WHEEL
:param build_number: The build tags present in .dist-info/WHEEL
:return: The (modified) contents of .dist-info/WHEEL
"""
replacement = (
("Build: %s\r\n" % build_number).encode("ascii") if build_number else b""
)
wheel_file_content, num_replaced = BUILD_NUM_RE.subn(
replacement, wheel_file_content
)
if not num_replaced:
wheel_file_content += replacement
return wheel_file_content
def compute_tagline(tags: list[str]) -> str:
"""Compute a tagline from a list of tags.
:param tags: A list of tags
:return: A tagline
"""
impls = sorted({tag.split("-")[0] for tag in tags})
abivers = sorted({tag.split("-")[1] for tag in tags})
platforms = sorted({tag.split("-")[2] for tag in tags})
return "-".join([".".join(impls), ".".join(abivers), ".".join(platforms)])
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