"""SCons.Tool.latex

Tool-specific initialization for LaTeX.

There normally shouldn't be any need to import this module directly.
It will usually be imported through the generic SCons.Tool.Tool()
selection method.

"""

#
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# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
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# The above copyright notice and this permission notice shall be included
# in all copies or substantial portions of the Software.
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__revision__ = "src/engine/SCons/Tool/latex.py 2928 2008/04/29 22:44:09 knight"

import SCons.Action
import SCons.Defaults
import SCons.Scanner.LaTeX
import SCons.Util
import SCons.Tool
import SCons.Tool.tex

LaTeXAction = None

def LaTeXAuxFunction(target = None, source= None, env=None):
    SCons.Tool.tex.InternalLaTeXAuxAction( LaTeXAction, target, source, env )

LaTeXAuxAction = SCons.Action.Action(LaTeXAuxFunction, strfunction=None)

def generate(env):
    """Add Builders and construction variables for LaTeX to an Environment."""
    global LaTeXAction
    if LaTeXAction is None:
        LaTeXAction = SCons.Action.Action('$LATEXCOM', '$LATEXCOMSTR')

    import dvi
    dvi.generate(env)

    bld = env['BUILDERS']['DVI']
    bld.add_action('.ltx', LaTeXAuxAction)
    bld.add_action('.latex', LaTeXAuxAction)
    bld.add_emitter('.ltx', SCons.Tool.tex.tex_emitter)
    bld.add_emitter('.latex', SCons.Tool.tex.tex_emitter)

    env['LATEX']        = 'latex'
    env['LATEXFLAGS']   = SCons.Util.CLVar('')
    env['LATEXCOM']     = 'cd ${TARGET.dir} && $LATEX $LATEXFLAGS ${SOURCE.file}'
    env['LATEXRETRIES'] = 3

def exists(env):
    return env.Detect('latex')
