sphinx_svg_to_pdf.py

import subprocess

from sphinx.errors import ExtensionError
from sphinx.util import logging
from sphinx.transforms.post_transforms.images import ImageConverter
from sphinx.util.osutil import ENOENT, EPIPE, EINVAL

logger = logging.getLogger(__name__)

class InkscapeConverter(ImageConverter):
    conversion_rules = [('image/svg+xml', 'application/pdf')]

    def is_available(self):
        return True

    def convert(self, from_file, to_file):
        try:
            args = ["inkscape", "-D", "-A", to_file, from_file]
            logger.info("Invoking %r ...", args)
            p = subprocess.Popen(args, stdin=subprocess.PIPE, stdout=subprocess.PIPE)
        except OSError as err:
            if err.errno != ENOENT:
                raise
            logger.warning("inkscape not found, make sure it's installed and on your PATH.")
            return False
            
        try:
            stdout, stderr = p.communicate()
        except (OSError, IOError) as err:
            if err.errno not in (EPIPE, EINVAL):
                raise
            stdout, stderr = p.stdout.read(), p.stderr.read()
            p.wait()

        if p.returncode != 0:
            raise ExtensionError("inkscape exited with error:\n%s\n", stderr)

        return True

class RSVGConverter(ImageConverter):
    conversion_rules = [('image/svg+xml', 'application/pdf')]

    def is_available(self):
        return True

    def convert(self, from_file, to_file):
        try:
            args = ["rsvg-convert", "-f", "pdf", from_file, "-o", to_file]
            logger.info("Invoking %r ...", args)
            p = subprocess.Popen(args, stdin=subprocess.PIPE, stdout=subprocess.PIPE)
        except OSError as err:
            if err.errno != ENOENT:
                raise
            logger.warning("rsvg-convert not found, make sure it's installed and on your PATH.")
            return False
            
        try:
            stdout, stderr = p.communicate()
        except (OSError, IOError) as err:
            if err.errno not in (EPIPE, EINVAL):
                raise
            stdout, stderr = p.stdout.read(), p.stderr.read()
            p.wait()

        if p.returncode != 0:
            raise ExtensionError("rsvg-convert exited with error:\n%s\n", stderr)

        return True
    
def setup(app):
    #app.add_post_transform(RSVGConverter)
    app.add_post_transform(InkscapeConverter)