mapnik/scons/scons-local-4.8.1/SCons/Tool/dvi.py

# MIT License
#
# Copyright The SCons Foundation
#
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# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
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# permit persons to whom the Software is furnished to do so, subject to
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# The above copyright notice and this permission notice shall be included
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"""
Common DVI Builder definition for various other Tool modules that use it.
"""

import SCons.Builder
import SCons.Tool

DVIBuilder = None

def generate(env) -> None:
    try:
        env['BUILDERS']['DVI']
    except KeyError:
        global DVIBuilder

        if DVIBuilder is None:
            # The suffix is hard-coded to '.dvi', not configurable via a
            # construction variable like $DVISUFFIX, because the output
            # file name is hard-coded within TeX.
            DVIBuilder = SCons.Builder.Builder(action = {},
                                               source_scanner = SCons.Tool.LaTeXScanner,
                                               suffix = '.dvi',
                                               emitter = {},
                                               source_ext_match = None)

        env['BUILDERS']['DVI'] = DVIBuilder

def exists(env) -> bool:
    # This only puts a skeleton Builder in place, so if someone
    # references this Tool directly, it's always "available."
    return True

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