65 lines
2 KiB
Python
65 lines
2 KiB
Python
from docutils import nodes
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from docutils.parsers.rst import Directive, directives
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from sphinx.util.docutils import SphinxDirective
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from shutil import which
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from pathlib import Path
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import shlex
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import subprocess
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import tempfile
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import uuid
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class D2langDirective(SphinxDirective):
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required_arguments = 0
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has_content = True
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optional_arguments = 3
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option_spec = {
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'layout': directives.unchanged_required,
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'filename': directives.unchanged_required,
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}
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def run(self):
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d2_bin = which('d2')
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srcdir = self.state.document.settings.env.srcdir
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diag_source = self.content
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out_dir = self.state.document.current_source.rsplit("/",1)[0]
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if 'filename' in self.options:
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output_fname = out_dir + "/" + self.options.get('filename')
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else:
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output_fname = out_dir + "/" + "d2lang_svg/" + str(uuid.uuid4()) + ".svg"
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if 'layout' in self.options:
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layout = self.options.get('layout')
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else:
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layout = 'dagre'
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if self.arguments:
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path = Path(srcdir + '/' + self.arguments[0])
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if path.is_file():
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build_svg(
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srcdir + '/' + self.arguments[0],
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srcdir,
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output_fname,
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layout
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)
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else:
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raise
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else:
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with tempfile.NamedTemporaryFile(dir="./") as fp:
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for line in self.content.data:
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fp.write(bytes(line,'utf-8'))
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fp.write(bytes('\n','utf-8'))
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fp.seek(0)
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build_svg(fp.name, srcdir, output_fname, layout)
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image_node = nodes.image(uri=output_fname)
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return [image_node]
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def build_svg(diag_src, out_dir, filename, layout):
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d2_bin = which('d2')
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cmd_line = '{bin} -l {layout} {src} {out}'.format(
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bin=d2_bin,
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layout=layout,
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src=diag_src,
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out=out_dir + "/" + filename
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)
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args = shlex.split(cmd_line)
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subprocess.run(args)
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return True
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