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Copy pathtemplate_lib.py
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152 lines (127 loc) · 4.15 KB
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from __future__ import annotations
import html
import os
import re
import shlex
import subprocess
import sys
import markdown_code_blocks
import markupsafe
ID_RE = re.compile(r' #([a-z0-9-]+)$')
SPECIAL_CHARS_RE = re.compile('(&[a-z]+;|[^a-z0-9 _-])')
ROW = '=r='
COL = ' =c= '
INDENT = ' ' * 8
def _render_table(code: str) -> str:
"""Renders our custom "table" type
```table
=r=
=c= col1
=c= col2
=r=
=c= col3
=c= col4
```
renders to
<table class="table table-bordered">
<tbody>
<tr><td>col1</td><td>col2</td></tr>
<tr><td>col3</td><td>col4</td></tr>
</tbody>
</table>
"""
output = ['<table class="table table-bordered"><tbody>']
in_row = False
col_buffer = None
def _maybe_end_col() -> None:
nonlocal col_buffer
if col_buffer is not None:
output.append(f'<td>{md(col_buffer)}</td>')
col_buffer = None
def _maybe_end_row() -> None:
nonlocal in_row
if in_row:
output.append('</tr>')
in_row = False
for line in code.splitlines(True):
if line.startswith(ROW):
_maybe_end_col()
_maybe_end_row()
in_row = True
output.append('<tr>')
elif line.startswith(COL):
_maybe_end_col()
col_buffer = line.removeprefix(COL)
elif col_buffer is not None:
if line == '\n':
col_buffer += line
else:
assert line.startswith(INDENT), line
col_buffer += line.removeprefix(INDENT)
else:
raise AssertionError(line)
_maybe_end_col()
_maybe_end_row()
output.append('</tbody></table>')
return ''.join(output)
def _render_cmd(code: str) -> str:
cmdstr = code.strip()
path = f'{os.path.dirname(sys.executable)}{os.pathsep}{os.environ["PATH"]}'
env = {**os.environ, 'PATH': path}
output = subprocess.check_output(shlex.split(cmdstr), env=env).decode()
return str(md(f'```pre-commit\n$ {cmdstr}\n{output}```'))
class Renderer(markdown_code_blocks.CodeRenderer):
def link(self, text: str, url: str, title: str | None = None) -> str:
if url.startswith('_#'):
a_id = url.removeprefix('_#')
return f'<a id="{a_id}" href="#{a_id}">{text}</a>'
elif url.startswith('__#'):
return f'<a name="{url.removeprefix("__#")}"></a>'
else:
return super().link(text, url, title)
def heading(self, text: str, level: int) -> str:
match = ID_RE.search(text)
text = ID_RE.sub('', text)
if match:
h_id = match[1]
else:
h_id = SPECIAL_CHARS_RE.sub('', text.lower()).replace(' ', '-')
return (
f'<h{level} id="{h_id}">'
f' {text} <small><a href="#{h_id}" class="text-decoration-none">¶</a></small>' # noqa: E501
f'</h{level}> '
)
def codespan(self, text: str) -> str:
if text.startswith('<kbd>'):
# we trust this content
return text
else:
return super().codespan(text)
def image(self, text: str, url: str, title: str | None = None) -> str:
return (
f'<img '
f' src="{html.escape(url)}"'
f' alt="{html.escape(text)}"'
f' class="img-fluid img-thumbnail"'
f'>'
)
def block_code(self, code: str, info: str | None = None) -> str:
copyable = False
if info is not None:
copyable_s = '#copyable'
copyable = info.endswith(copyable_s)
info, _, _ = info.partition(copyable_s)
if info == 'table':
ret = _render_table(code)
elif info == 'cmd':
ret = _render_cmd(code)
else:
ret = super().block_code(code, info)
if copyable:
return f'<div class="copyable">{ret}</div>'
else:
return ret
def md(s: str) -> markupsafe.Markup:
html = markdown_code_blocks.highlight(s, Renderer=Renderer)
# manually bless the highlighted output.
return markupsafe.Markup(html)