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"""
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Contains writer for writing nbconvert output to PDF.
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"""
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#-----------------------------------------------------------------------------
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#Copyright (c) 2013, the IPython Development Team.
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#
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#Distributed under the terms of the Modified BSD License.
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#
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#The full license is in the file COPYING.txt, distributed with this software.
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#-----------------------------------------------------------------------------
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#-----------------------------------------------------------------------------
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# Imports
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#-----------------------------------------------------------------------------
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import subprocess
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import os
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from IPython.utils.traitlets import Integer, List, Bool
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from .base import PostProcessorBase
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#-----------------------------------------------------------------------------
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# Classes
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#-----------------------------------------------------------------------------
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class PDFPostProcessor(PostProcessorBase):
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"""Writer designed to write to PDF files"""
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iteration_count = Integer(3, config=True, help="""
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How many times pdflatex will be called.
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""")
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command = List(["pdflatex", "{filename}"], config=True, help="""
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Shell command used to compile PDF.""")
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verbose = Bool(False, config=True, help="""
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Whether or not to display the output of the compile call.
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""")
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def call(self, input):
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"""
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Consume and write Jinja output a PDF.
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See files.py for more...
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"""
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command = [c.format(filename=input) for c in self.command]
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self.log.info("Building PDF: %s", command)
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with open(os.devnull, 'rb') as null:
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stdout = subprocess.PIPE if not self.verbose else None
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for index in range(self.iteration_count):
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p = subprocess.Popen(command, stdout=stdout, stdin=null)
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out, err = p.communicate()
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if p.returncode:
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if self.verbose:
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# verbose means I didn't capture stdout with PIPE,
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# so it's already been displayed and `out` is None.
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out = u''
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else:
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out = out.decode('utf-8', 'replace')
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self.log.critical(u"PDF conversion failed: %s\n%s", command, out)
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return
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