132 lines
3.7 KiB
Python
132 lines
3.7 KiB
Python
import os
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import subprocess
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import jinja2
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# =============================================================================
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def generate_outfile(
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templatesdir,
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templatename,
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context,
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outfilename,
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log = None,
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):
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# Template rendering
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# -------------------------------------------------------------------------
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log.info("Generating SVG using '{}' template".format(templatename))
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jj2_env = jinja2.Environment(
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loader = jinja2.FileSystemLoader( templatesdir )
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)
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try:
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jj2_tpl = jj2_env.get_template(
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os.path.join(
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templatename,
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"template.svg.j2",
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)
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)
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except:
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log.error("Could not find template '{}'".format(templatename))
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return None
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extension = outfilename.split(".")[-1]
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# To SVG
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# -------------------------------------------------------------------------
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if extension == "svg":
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jj2_tpl.stream(context).dump( outfilename )
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return outfilename
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# To PNG with inkscape
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# -------------------------------------------------------------------------
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if extension == "png":
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try:
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log.info("Exporting to {} using inkscape".format(extension))
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import subprocess
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jj2_tpl.stream(context).dump( "tmp.svg" )
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inkscape_process = subprocess.Popen(
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[
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"inkscape",
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"tmp.svg",
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"--export-filename",
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outfilename,
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],
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stdout = subprocess.PIPE,
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stderr = subprocess.STDOUT,
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universal_newlines = True,
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)
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for line_out in iter(inkscape_process.stdout.readline, ""):
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log.debug(line_out)
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inkscape_process.stdout.close()
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rv = inkscape_process.wait()
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if rv != 0:
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raise Exception(
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"Bad inkscape return code '{}'" \
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.format(inkscape_process.returncode)
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)
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os.unlink("tmp.svg")
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return outfilename
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except Exception as e:
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log.warning("Failed to export with inkscape")
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try:
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os.unlink("tmp.svg")
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except:
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pass
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log.debug(e)
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# To png, pdf or ps with cairosvg
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# -------------------------------------------------------------------------
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if extension in [ "png", "pdf", "ps" ]:
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log.info("Exporting to {} using cairosvg".format(extension))
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try:
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import cairosvg
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except ImportError as e:
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log.error(
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"Failed to export to '{}' with cairosvg" \
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.format(
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outfilename,
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)
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)
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log.debug(e)
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svg_str = jj2_tpl.render(context)
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if extension == "png":
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conversion_fun = cairosvg.svg2png
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elif extension == "pdf":
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conversion_fun = cairosvg.svg2pdf
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elif extension == "ps":
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conversion_fun = cairosvg.svg2ps
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conversion_fun(
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bytestring = svg_str,
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write_to = outfilename,
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)
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return outfilename
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# To unsupported format
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# -------------------------------------------------------------------------
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log.error(
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"Can't export to '{}' : unsupported format '{}'" \
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.format(
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outfilename,
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extension,
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)
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)
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return None
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