mirror of
https://github.com/python/cpython
synced 2024-09-05 08:17:45 +00:00
207 lines
7.4 KiB
Python
207 lines
7.4 KiB
Python
import contextlib
|
|
import os
|
|
import pathlib
|
|
import shutil
|
|
import stat
|
|
import sys
|
|
import zipfile
|
|
|
|
__all__ = ['ZipAppError', 'create_archive', 'get_interpreter']
|
|
|
|
|
|
# The __main__.py used if the users specifies "-m module:fn".
|
|
# Note that this will always be written as UTF-8 (module and
|
|
# function names can be non-ASCII in Python 3).
|
|
# We add a coding cookie even though UTF-8 is the default in Python 3
|
|
# because the resulting archive may be intended to be run under Python 2.
|
|
MAIN_TEMPLATE = """\
|
|
# -*- coding: utf-8 -*-
|
|
import {module}
|
|
{module}.{fn}()
|
|
"""
|
|
|
|
|
|
# The Windows launcher defaults to UTF-8 when parsing shebang lines if the
|
|
# file has no BOM. So use UTF-8 on Windows.
|
|
# On Unix, use the filesystem encoding.
|
|
if sys.platform.startswith('win'):
|
|
shebang_encoding = 'utf-8'
|
|
else:
|
|
shebang_encoding = sys.getfilesystemencoding()
|
|
|
|
|
|
class ZipAppError(ValueError):
|
|
pass
|
|
|
|
|
|
@contextlib.contextmanager
|
|
def _maybe_open(archive, mode):
|
|
if isinstance(archive, (str, os.PathLike)):
|
|
with open(archive, mode) as f:
|
|
yield f
|
|
else:
|
|
yield archive
|
|
|
|
|
|
def _write_file_prefix(f, interpreter):
|
|
"""Write a shebang line."""
|
|
if interpreter:
|
|
shebang = b'#!' + interpreter.encode(shebang_encoding) + b'\n'
|
|
f.write(shebang)
|
|
|
|
|
|
def _copy_archive(archive, new_archive, interpreter=None):
|
|
"""Copy an application archive, modifying the shebang line."""
|
|
with _maybe_open(archive, 'rb') as src:
|
|
# Skip the shebang line from the source.
|
|
# Read 2 bytes of the source and check if they are #!.
|
|
first_2 = src.read(2)
|
|
if first_2 == b'#!':
|
|
# Discard the initial 2 bytes and the rest of the shebang line.
|
|
first_2 = b''
|
|
src.readline()
|
|
|
|
with _maybe_open(new_archive, 'wb') as dst:
|
|
_write_file_prefix(dst, interpreter)
|
|
# If there was no shebang, "first_2" contains the first 2 bytes
|
|
# of the source file, so write them before copying the rest
|
|
# of the file.
|
|
dst.write(first_2)
|
|
shutil.copyfileobj(src, dst)
|
|
|
|
if interpreter and isinstance(new_archive, str):
|
|
os.chmod(new_archive, os.stat(new_archive).st_mode | stat.S_IEXEC)
|
|
|
|
|
|
def create_archive(source, target=None, interpreter=None, main=None,
|
|
filter=None, compressed=False):
|
|
"""Create an application archive from SOURCE.
|
|
|
|
The SOURCE can be the name of a directory, or a filename or a file-like
|
|
object referring to an existing archive.
|
|
|
|
The content of SOURCE is packed into an application archive in TARGET,
|
|
which can be a filename or a file-like object. If SOURCE is a directory,
|
|
TARGET can be omitted and will default to the name of SOURCE with .pyz
|
|
appended.
|
|
|
|
The created application archive will have a shebang line specifying
|
|
that it should run with INTERPRETER (there will be no shebang line if
|
|
INTERPRETER is None), and a __main__.py which runs MAIN (if MAIN is
|
|
not specified, an existing __main__.py will be used). It is an error
|
|
to specify MAIN for anything other than a directory source with no
|
|
__main__.py, and it is an error to omit MAIN if the directory has no
|
|
__main__.py.
|
|
"""
|
|
# Are we copying an existing archive?
|
|
source_is_file = False
|
|
if hasattr(source, 'read') and hasattr(source, 'readline'):
|
|
source_is_file = True
|
|
else:
|
|
source = pathlib.Path(source)
|
|
if source.is_file():
|
|
source_is_file = True
|
|
|
|
if source_is_file:
|
|
_copy_archive(source, target, interpreter)
|
|
return
|
|
|
|
# We are creating a new archive from a directory.
|
|
if not source.exists():
|
|
raise ZipAppError("Source does not exist")
|
|
has_main = (source / '__main__.py').is_file()
|
|
if main and has_main:
|
|
raise ZipAppError(
|
|
"Cannot specify entry point if the source has __main__.py")
|
|
if not (main or has_main):
|
|
raise ZipAppError("Archive has no entry point")
|
|
|
|
main_py = None
|
|
if main:
|
|
# Check that main has the right format.
|
|
mod, sep, fn = main.partition(':')
|
|
mod_ok = all(part.isidentifier() for part in mod.split('.'))
|
|
fn_ok = all(part.isidentifier() for part in fn.split('.'))
|
|
if not (sep == ':' and mod_ok and fn_ok):
|
|
raise ZipAppError("Invalid entry point: " + main)
|
|
main_py = MAIN_TEMPLATE.format(module=mod, fn=fn)
|
|
|
|
if target is None:
|
|
target = source.with_suffix('.pyz')
|
|
elif not hasattr(target, 'write'):
|
|
target = pathlib.Path(target)
|
|
|
|
with _maybe_open(target, 'wb') as fd:
|
|
_write_file_prefix(fd, interpreter)
|
|
compression = (zipfile.ZIP_DEFLATED if compressed else
|
|
zipfile.ZIP_STORED)
|
|
with zipfile.ZipFile(fd, 'w', compression=compression) as z:
|
|
for child in sorted(source.rglob('*')):
|
|
arcname = child.relative_to(source)
|
|
if filter is None or filter(arcname):
|
|
z.write(child, arcname.as_posix())
|
|
if main_py:
|
|
z.writestr('__main__.py', main_py.encode('utf-8'))
|
|
|
|
if interpreter and not hasattr(target, 'write'):
|
|
target.chmod(target.stat().st_mode | stat.S_IEXEC)
|
|
|
|
|
|
def get_interpreter(archive):
|
|
with _maybe_open(archive, 'rb') as f:
|
|
if f.read(2) == b'#!':
|
|
return f.readline().strip().decode(shebang_encoding)
|
|
|
|
|
|
def main(args=None):
|
|
"""Run the zipapp command line interface.
|
|
|
|
The ARGS parameter lets you specify the argument list directly.
|
|
Omitting ARGS (or setting it to None) works as for argparse, using
|
|
sys.argv[1:] as the argument list.
|
|
"""
|
|
import argparse
|
|
|
|
parser = argparse.ArgumentParser()
|
|
parser.add_argument('--output', '-o', default=None,
|
|
help="The name of the output archive. "
|
|
"Required if SOURCE is an archive.")
|
|
parser.add_argument('--python', '-p', default=None,
|
|
help="The name of the Python interpreter to use "
|
|
"(default: no shebang line).")
|
|
parser.add_argument('--main', '-m', default=None,
|
|
help="The main function of the application "
|
|
"(default: use an existing __main__.py).")
|
|
parser.add_argument('--compress', '-c', action='store_true',
|
|
help="Compress files with the deflate method. "
|
|
"Files are stored uncompressed by default.")
|
|
parser.add_argument('--info', default=False, action='store_true',
|
|
help="Display the interpreter from the archive.")
|
|
parser.add_argument('source',
|
|
help="Source directory (or existing archive).")
|
|
|
|
args = parser.parse_args(args)
|
|
|
|
# Handle `python -m zipapp archive.pyz --info`.
|
|
if args.info:
|
|
if not os.path.isfile(args.source):
|
|
raise SystemExit("Can only get info for an archive file")
|
|
interpreter = get_interpreter(args.source)
|
|
print("Interpreter: {}".format(interpreter or "<none>"))
|
|
sys.exit(0)
|
|
|
|
if os.path.isfile(args.source):
|
|
if args.output is None or (os.path.exists(args.output) and
|
|
os.path.samefile(args.source, args.output)):
|
|
raise SystemExit("In-place editing of archives is not supported")
|
|
if args.main:
|
|
raise SystemExit("Cannot change the main function when copying")
|
|
|
|
create_archive(args.source, args.output,
|
|
interpreter=args.python, main=args.main,
|
|
compressed=args.compress)
|
|
|
|
|
|
if __name__ == '__main__':
|
|
main()
|