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#!/usr/bin/env python
# reStructuredText (RST) to GitHub-flavored Markdown converter
import re, sys
from docutils import core, nodes, writers
def is_github_ref(node):
return re.match('https://github.com/.*/(issues|pull)/.*', node['refuri'])
class Translator(nodes.NodeVisitor):
def __init__(self, document):
nodes.NodeVisitor.__init__(self, document)
self.output = ''
self.indent = 0
self.preserve_newlines = False
def write(self, text):
self.output += text.replace('\n', '\n' + ' ' * self.indent)
def visit_document(self, node):
pass
def depart_document(self, node):
pass
def visit_section(self, node):
pass
def depart_section(self, node):
# Skip all sections except the first one.
raise nodes.StopTraversal
def visit_title(self, node):
self.version = re.match(r'(\d+\.\d+\.\d+).*', node.children[0]).group(1)
raise nodes.SkipChildren
def visit_title_reference(self, node):
raise Exception(node)
def depart_title(self, node):
pass
def visit_Text(self, node):
if not self.preserve_newlines:
node = node.replace('\n', ' ')
self.write(node)
def depart_Text(self, node):
pass
def visit_bullet_list(self, node):
pass
def depart_bullet_list(self, node):
pass
def visit_list_item(self, node):
self.write('* ')
self.indent += 2
def depart_list_item(self, node):
self.indent -= 2
self.write('\n\n')
def visit_paragraph(self, node):
pass
def depart_paragraph(self, node):
pass
def visit_reference(self, node):
if not is_github_ref(node):
self.write('[')
def depart_reference(self, node):
if not is_github_ref(node):
self.write('](' + node['refuri'] + ')')
def visit_target(self, node):
pass
def depart_target(self, node):
pass
def visit_literal(self, node):
self.write('`')
def depart_literal(self, node):
self.write('`')
def visit_literal_block(self, node):
self.write('\n\n```')
if 'c++' in node['classes']:
self.write('c++')
self.write('\n')
self.preserve_newlines = True
def depart_literal_block(self, node):
self.write('\n```\n')
self.preserve_newlines = False
def visit_inline(self, node):
pass
def depart_inline(self, node):
pass
def visit_image(self, node):
self.write('')
def depart_image(self, node):
pass
def write_row(self, row, widths):
for i, entry in enumerate(row):
text = entry[0][0] if len(entry) > 0 else ''
if i != 0:
self.write('|')
self.write('{:{}}'.format(text, widths[i]))
self.write('\n')
def visit_table(self, node):
table = node.children[0]
colspecs = table[:-2]
thead = table[-2]
tbody = table[-1]
widths = [int(cs['colwidth']) for cs in colspecs]
sep = '|'.join(['-' * w for w in widths]) + '\n'
self.write('\n\n')
self.write_row(thead[0], widths)
self.write(sep)
for row in tbody:
self.write_row(row, widths)
raise nodes.SkipChildren
def depart_table(self, node):
pass
class MDWriter(writers.Writer):
"""GitHub-flavored markdown writer"""
supported = ('md',)
"""Formats this writer supports."""
def translate(self):
translator = Translator(self.document)
self.document.walkabout(translator)
self.output = (translator.output, translator.version)
def convert(rst_path):
"""Converts RST file to Markdown."""
return core.publish_file(source_path=rst_path, writer=MDWriter())
if __name__ == '__main__':
convert(sys.argv[1])
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