"""SCons.Tool.pdflatex

Tool-specific initialization for pdflatex.

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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__revision__ = "src/engine/SCons/Tool/pdflatex.py 4043 2009/02/23 09:06:45 scons"

import SCons.Action
import SCons.Util
import SCons.Tool.pdf
import SCons.Tool.tex

PDFLaTeXAction = None

def PDFLaTeXAuxFunction(target = None, source= None, env=None):
    result = SCons.Tool.tex.InternalLaTeXAuxAction( PDFLaTeXAction, target, source, env )
    return result

PDFLaTeXAuxAction = None

def generate(env):
    """Add Builders and construction variables for pdflatex to an Environment."""
    global PDFLaTeXAction
    if PDFLaTeXAction is None:
        PDFLaTeXAction = SCons.Action.Action('$PDFLATEXCOM', '$PDFLATEXCOMSTR')

    global PDFLaTeXAuxAction
    if PDFLaTeXAuxAction is None:
        PDFLaTeXAuxAction = SCons.Action.Action(PDFLaTeXAuxFunction,
                              strfunction=SCons.Tool.tex.TeXLaTeXStrFunction)

    import pdf
    pdf.generate(env)

    bld = env['BUILDERS']['PDF']
    bld.add_action('.ltx', PDFLaTeXAuxAction)
    bld.add_action('.latex', PDFLaTeXAuxAction)
    bld.add_emitter('.ltx', SCons.Tool.tex.tex_pdf_emitter)
    bld.add_emitter('.latex', SCons.Tool.tex.tex_pdf_emitter)

    env['PDFLATEX']      = 'pdflatex'
    env['PDFLATEXFLAGS'] = SCons.Util.CLVar('-interaction=nonstopmode')
    env['PDFLATEXCOM']   = 'cd ${TARGET.dir} && $PDFLATEX $PDFLATEXFLAGS ${SOURCE.file}'
    env['LATEXRETRIES']  = 3

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

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