Function write_js_metadata

dash/development/_r_components_generation.py:488–539

Write an internal (not exported) R function to return all JS dependencies as required by dash. Parameters ---------- project_shortname = hyphenated string, e.g. dash-html-components Returns -------

(pkg_data, project_shortname, has_wildcards)

def write_js_metadata(pkg_data, project_shortname, has_wildcards):
    """Write an internal (not exported) R function to return all JS
    dependencies as required by dash.

    Parameters
    ----------
    project_shortname = hyphenated string, e.g. dash-html-components

    Returns
    -------
    """
    function_string = generate_js_metadata(
        pkg_data=pkg_data, project_shortname=project_shortname
    )
    file_name = "internal.R"

    # the R source directory for the package won't exist on first call
    # create the R directory if it is missing
    if not os.path.exists("R"):
        os.makedirs("R")

    file_path = os.path.join("R", file_name)
    with open(file_path, "w", encoding="utf-8") as f:
        f.write(function_string)
        if has_wildcards:
            f.write(wildcard_helper)

    # now copy over all JS dependencies from the (Python) components dir
    # the inst/lib directory for the package won't exist on first call
    # create this directory if it is missing
    if os.path.exists("inst/deps"):
        shutil.rmtree("inst/deps")

    os.makedirs("inst/deps")

    for rel_dirname, _, filenames in os.walk(project_shortname):
        for filename in filenames:
            extension = os.path.splitext(filename)[1]

            if extension in [".py", ".pyc", ".json"]:
                continue

            target_dirname = os.path.join(
                os.path.join(
                    "inst/deps/", os.path.relpath(rel_dirname, project_shortname)
                )
            )

            if not os.path.exists(target_dirname):
                os.makedirs(target_dirname)

            shutil.copy(os.path.join(rel_dirname, filename), target_dirname)


# pylint: disable=R0914, R0913, R0912, R0915