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#!/usr/bin/env nix-shell
#! nix-shell ../../../../../../../. -i python3 -p python3 -p nix
from os.path import (
dirname,
abspath,
join,
)
from typing import (
List,
Any,
)
import subprocess
import json
import sys
import os
def fmt_grammar(grammar: str) -> str:
return "tree-sitter-" + grammar
def eval_expr(nixpkgs: str, expr: str) -> Any:
p = subprocess.run(
[
"nix-instantiate",
"--json",
"--eval",
"--expr",
("with import %s {}; %s" % (nixpkgs, expr)),
],
check=True,
stdout=subprocess.PIPE,
)
return json.loads(p.stdout)
def check_grammar_exists(nixpkgs: str, grammar: str) -> bool:
return eval_expr(
nixpkgs, f'lib.hasAttr "{fmt_grammar(grammar)}" tree-sitter-grammars'
)
def build_attr(nixpkgs, attr: str) -> str:
return (
subprocess.run(
["nix-build", "--no-out-link", nixpkgs, "-A", attr],
check=True,
stdout=subprocess.PIPE,
)
.stdout.decode()
.strip()
)
if __name__ == "__main__":
cwd = dirname(abspath(__file__))
nixpkgs = abspath(join(cwd, "../../../../../.."))
src_dir = build_attr(nixpkgs, "emacs.pkgs.tree-sitter-langs.src")
existing: List[str] = []
grammars = os.listdir(join(src_dir, "repos"))
for g in grammars:
exists = check_grammar_exists(nixpkgs, g)
if exists:
existing.append(fmt_grammar(g))
else:
sys.stderr.write("Missing grammar: " + fmt_grammar(g) + "\n")
sys.stderr.flush()
with open(join(cwd, "default-grammars.json"), mode="w") as f:
json.dump(sorted(existing), f, indent=2)
f.write("\n")
|
