mirror of
https://github.com/NixOS/nix.git
synced 2024-11-25 16:23:02 +00:00
eb7d7780b1
This is needed to avoid this https://github.com/mesonbuild/meson/issues/13774 when we go back to making our subproject directory `src`.
112 lines
4.1 KiB
Python
112 lines
4.1 KiB
Python
#!/usr/bin/env python3
|
|
|
|
from pathlib import Path
|
|
import json
|
|
import os, os.path
|
|
import sys
|
|
import typing as t
|
|
|
|
name = 'substitute.py'
|
|
|
|
def log(*args: t.Any, **kwargs: t.Any) -> None:
|
|
kwargs['file'] = sys.stderr
|
|
print(f'{name}:', *args, **kwargs)
|
|
|
|
def do_include(content: str, relative_md_path: Path, source_root: Path, search_path: Path) -> str:
|
|
assert not relative_md_path.is_absolute(), f'{relative_md_path=} from mdbook should be relative'
|
|
|
|
md_path_abs = source_root / relative_md_path
|
|
var_abs = md_path_abs.parent
|
|
assert var_abs.is_dir(), f'supposed directory {var_abs} is not a directory (cwd={os.getcwd()})'
|
|
|
|
lines = []
|
|
for l in content.splitlines(keepends=True):
|
|
if l.strip().startswith("{{#include "):
|
|
requested = l.strip()[11:][:-2]
|
|
if requested.startswith("@generated@/"):
|
|
included = search_path / Path(requested[12:])
|
|
requested = included.relative_to(search_path)
|
|
else:
|
|
included = source_root / relative_md_path.parent / requested
|
|
requested = included.resolve().relative_to(source_root)
|
|
assert included.exists(), f"{requested} not found at {included}"
|
|
lines.append(do_include(included.read_text(), requested, source_root, search_path) + "\n")
|
|
else:
|
|
lines.append(l)
|
|
return "".join(lines)
|
|
|
|
def recursive_replace(data: dict[str, t.Any], book_root: Path, search_path: Path) -> dict[str, t.Any]:
|
|
match data:
|
|
case {'sections': sections}:
|
|
return data | dict(
|
|
sections = [recursive_replace(section, book_root, search_path) for section in sections],
|
|
)
|
|
case {'Chapter': chapter}:
|
|
path_to_chapter = Path(chapter['path'])
|
|
chapter_content = chapter['content']
|
|
|
|
return data | dict(
|
|
Chapter = chapter | dict(
|
|
# first process includes. this must happen before docroot processing since
|
|
# mdbook does not see these included files, only the final agglomeration.
|
|
content = do_include(
|
|
chapter_content,
|
|
path_to_chapter,
|
|
book_root,
|
|
search_path
|
|
).replace(
|
|
'@docroot@',
|
|
("../" * len(path_to_chapter.parent.parts) or "./")[:-1]
|
|
),
|
|
sub_items = [
|
|
recursive_replace(sub_item, book_root, search_path)
|
|
for sub_item in chapter['sub_items']
|
|
],
|
|
),
|
|
)
|
|
|
|
case rest:
|
|
assert False, f'should have been called on a dict, not {type(rest)=}\n\t{rest=}'
|
|
|
|
def main() -> None:
|
|
|
|
|
|
if len(sys.argv) > 1 and sys.argv[1] == 'supports':
|
|
return 0
|
|
|
|
# includes pointing into @generated@ will look here
|
|
search_path = Path(os.environ['MDBOOK_SUBSTITUTE_SEARCH'])
|
|
|
|
if len(sys.argv) > 1 and sys.argv[1] == 'summary':
|
|
print(do_include(
|
|
sys.stdin.read(),
|
|
Path('source/SUMMARY.md'),
|
|
Path(sys.argv[2]).resolve(),
|
|
search_path))
|
|
return
|
|
|
|
# mdbook communicates with us over stdin and stdout.
|
|
# It splorks us a JSON array, the first element describing the context,
|
|
# the second element describing the book itself,
|
|
# and then expects us to send it the modified book JSON over stdout.
|
|
|
|
context, book = json.load(sys.stdin)
|
|
|
|
# book_root is the directory where book contents leave (ie, source/)
|
|
book_root = Path(context['root']) / context['config']['book']['src']
|
|
|
|
# Find @var@ in all parts of our recursive book structure.
|
|
replaced_content = recursive_replace(book, book_root, search_path)
|
|
|
|
replaced_content_str = json.dumps(replaced_content)
|
|
|
|
# Give mdbook our changes.
|
|
print(replaced_content_str)
|
|
|
|
try:
|
|
sys.exit(main())
|
|
except AssertionError as e:
|
|
print(f'{name}: INTERNAL ERROR in mdbook preprocessor: {e}', file=sys.stderr)
|
|
print(f'this is a bug in {name}', file=sys.stderr)
|
|
raise
|