Metadata and template based website compiler
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"""Define a Jinja2 Processor which applies programmable templating to the input stream."""
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from typing import Dict, Iterable, Optional, cast
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from jinja2 import Environment, FileSystemLoader
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from .passthrough import PassThrough
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class Jinja2(PassThrough):
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"""Pass the input stream through Jinja2 for scritable templating."""
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def process(self, input_file: Iterable, ctx: Optional[Dict] = None) -> Iterable:
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"""Return an iterable object of the post-processed file.
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Arguments:
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input_file (iterable): An input stream
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ctx (dict, optional): A context object generated from the processor configuration
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Returns:
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iterable: The post-processed output stream
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"""
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ctx = cast(Dict, ctx)
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template_env = Environment(loader=FileSystemLoader(ctx["templates"]), extensions=["jinja2.ext.do"])
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template_env.globals.update(ctx["globals"])
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template_env.filters.update(ctx["filters"])
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tmpl = template_env.from_string("".join([x for x in input_file]))
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return tmpl.render(metadata=ctx)
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processor = Jinja2
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