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# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
# vim: set filetype=python:
# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.

option("--disable-nodejs", help="Require Node.js to build")
option(env="NODEJS", nargs=1, help="Path to nodejs")


@depends("--enable-nodejs", "NODEJS", bootstrap_search_path("node"))
@checking(
    "for nodejs", callback=lambda x: "%s (%s)" % (x.path, x.str_version) if x else "no"
)
@imports(_from="mozbuild.nodeutil", _import="find_node_executable")
@imports(_from="mozbuild.nodeutil", _import="NODE_MIN_VERSION")
def nodejs(require, env_node, search_path):
    # We don't use the dependency directly, but having it ensures the
    # auto-upgrade code in bootstrap_search_path is triggered, while
    # find_node_executable will use more or less the same search path.
    # We do however need to use the variable for the configure lint
    # not to fail.
    search_path

    node_exe = env_node[0] if env_node else None

    nodejs, version = find_node_executable(node_exe)

    MAYBE_FILE_A_BUG = """

    Executing `mach bootstrap --no-system-changes` should
    install a compatible version in ~/.mozbuild on most platforms.
    If you believe this is a bug, <https://mzl.la/2vLbXAv> is a good way
    to file.  More details: <https://bit.ly/2BbyD1E>
    """

    if not nodejs:
        msg = (
            "could not find Node.js executable later than %s; ensure "
            "`node` or `nodejs` is in PATH or set NODEJS in environment "
            "to point to an executable.%s" % (NODE_MIN_VERSION, MAYBE_FILE_A_BUG)
        )

        if require:
            raise FatalCheckError(msg)
        else:
            log.warning(msg)
            log.warning("(This will become an error in the near future.)")
            return

    if not version:
        msg = "NODEJS must point to node %s or newer; found node location: %s. %s" % (
            NODE_MIN_VERSION,
            nodejs,
            MAYBE_FILE_A_BUG,
        )

        if require:
            raise FatalCheckError(msg)
        else:
            log.warning(msg)
            return

    return namespace(
        path=nodejs,
        version=version,
        str_version=".".join(str(v) for v in version),
    )


set_config("NODEJS", depends_if(nodejs)(lambda p: p.path))