contrib/packaging/hgpackaging/inno.py

manifestcache: clear the cache before testing the debug command

Right now the cache is empty before this section of the test. However, we are
about to improve the persistence of the cache (putting it under `wllock`,
intead of `lock`). So we install the cleanup before.

# inno.py - Inno Setup functionality.
#
# Copyright 2019 Gregory Szorc <[e-mail]>
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.

# no-check-code because Python 3 native.

import os
import pathlib
import shutil
import subprocess

from .py2exe import (
    build_py2exe,
)
from .util import (
    find_vc_runtime_files,
)


EXTRA_PACKAGES = {
    'dulwich',
    'keyring',
    'pygments',
    'win32ctypes',
}


def build(source_dir: pathlib.Path, build_dir: pathlib.Path,
          python_exe: pathlib.Path, iscc_exe: pathlib.Path,
          version=None):
    """Build the Inno installer.

    Build files will be placed in ``build_dir``.

    py2exe's setup.py doesn't use setuptools. It doesn't have modern logic
    for finding the Python 2.7 toolchain. So, we require the environment
    to already be configured with an active toolchain.
    """
    if not iscc_exe.exists():
        raise Exception('%s does not exist' % iscc_exe)

    vc_x64 = r'\x64' in os.environ.get('LIB', '')

    requirements_txt = (source_dir / 'contrib' / 'packaging' /
                        'inno' / 'requirements.txt')

    build_py2exe(source_dir, build_dir, python_exe, 'inno',
                 requirements_txt, extra_packages=EXTRA_PACKAGES)

    # hg.exe depends on VC9 runtime DLLs. Copy those into place.
    for f in find_vc_runtime_files(vc_x64):
        if f.name.endswith('.manifest'):
            basename = 'Microsoft.VC90.CRT.manifest'
        else:
            basename = f.name

        dest_path = source_dir / 'dist' / basename

        print('copying %s to %s' % (f, dest_path))
        shutil.copyfile(f, dest_path)

    print('creating installer')

    args = [str(iscc_exe)]

    if vc_x64:
        args.append('/dARCH=x64')

    if version:
        args.append('/dVERSION=%s' % version)

    args.append('/Odist')
    args.append('contrib/packaging/inno/mercurial.iss')

    subprocess.run(args, cwd=str(source_dir), check=True)