Function create

constructor/briefcase.py:629–675

(info, verbose=False)

def create(info, verbose=False):
    if not IS_WINDOWS:
        raise OSError(f"Invalid platform '{sys.platform}'. MSI installers require Windows.")

    if not info.get("_conda_exe_supports_logging"):
        raise ValueError("MSI installers require conda-standalone with logging support.")

    # Check briefcase exists before doing any work
    briefcase = Path(sysconfig.get_path("scripts")) / "briefcase.exe"
    if not briefcase.exists():
        raise FileNotFoundError(
            f"Dependency 'briefcase' does not seem to be installed.\nTried: {briefcase}"
        )

    # MSI installers always use conda-standalone for uninstallation.
    # This ensures proper cleanup of conda init, environments, and shortcuts
    # via the `conda constructor uninstall` command.
    info["uninstall_with_conda_exe"] = True

    signing_tool = create_windows_signing_tool(info)

    payload = Payload(info)
    try:
        payload.prepare()

        logger.info("Building MSI installer")
        run(
            [briefcase, "package"] + (["-v"] if verbose else []),
            cwd=payload.root,
            check=True,
        )

        dist_dir = payload.root / "dist"
        msi_paths = list(dist_dir.glob("*.msi"))
        if len(msi_paths) != 1:
            raise RuntimeError(f"Found {len(msi_paths)} MSI files in {dist_dir}, expected 1.")

        if signing_tool:
            signing_tool.sign(msi_paths[0])
            signing_tool.verify_signature(msi_paths[0])

        outpath = Path(info["_outpath"])
        outpath.unlink(missing_ok=True)
        shutil.move(msi_paths[0], outpath)
    finally:
        if not info.get("_debug"):
            payload.remove()