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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')
@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')
@imports(_from='mozbuild.util', _import='system_encoding')
def nodejs(require, env_node):
    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.decode(system_encoding),
        version=version,
        str_version='.'.join(str(v) for v in version),
    )


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