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#!/usr/bin/env python3
from textwrap import dedent
from os.path import (
abspath,
dirname,
join,
)
from typing import (
Dict,
Any,
)
import subprocess
import tempfile
import json
import sys
import re
import requests
def eval_drv(nixpkgs: str, expr: str) -> Any:
expr = "\n".join(
(
"with (import %s {});" % nixpkgs,
expr,
)
)
with tempfile.NamedTemporaryFile(mode="w") as f:
f.write(dedent(expr))
f.flush()
p = subprocess.run(
["nix-instantiate", "--json", f.name], stdout=subprocess.PIPE, check=True
)
return p.stdout.decode().strip()
def get_src(tag_name: str) -> Dict[str, str]:
p = subprocess.run(
[
"nix-prefetch-github",
"--rev",
tag_name,
"--json",
"emacs-tree-sitter",
"elisp-tree-sitter",
],
stdout=subprocess.PIPE,
check=True,
)
src = json.loads(p.stdout)
fields = ["owner", "repo", "rev", "hash"]
return {f: src[f] for f in fields}
def get_cargo_hash(drv_path: str):
# Note: No check=True since we expect this command to fail
p = subprocess.run(["nix-store", "-r", drv_path], stderr=subprocess.PIPE)
stderr = p.stderr.decode()
lines = iter(stderr.split("\n"))
for l in lines:
if l.startswith("error: hash mismatch in fixed-output derivation"):
break
else:
raise ValueError("Did not find expected hash mismatch message")
for l in lines:
m = re.match(r"\s+got:\s+(.+)$", l)
if m:
return m.group(1)
raise ValueError("Could not extract actual hash: ", stderr)
if __name__ == "__main__":
cwd = sys.argv[1]
# This should point to the root default.nix of Nixpkgs tree
nixpkgs = abspath(join(cwd, "../../../../../../.."))
tag_name = requests.get(
"https://api.github.com/repos/emacs-tree-sitter/elisp-tree-sitter/releases/latest"
).json()["tag_name"]
src = get_src(tag_name)
with tempfile.NamedTemporaryFile(mode="w") as f:
json.dump(src, f)
f.flush()
drv_path = eval_drv(
nixpkgs,
"""
rustPlatform.buildRustPackage {
pname = "tsc-dyn";
version = "%s";
nativeBuildInputs = [ clang ];
src = fetchFromGitHub (lib.importJSON %s);
sourceRoot = "source/core";
cargoHash = lib.fakeHash;
}
"""
% (tag_name, f.name),
)
cargo_hash = get_cargo_hash(drv_path)
with open(join(cwd, "src.json"), mode="w") as f:
json.dump(
{
"src": src,
"version": tag_name,
"cargoHash": cargo_hash,
},
f,
indent=2,
)
f.write("\n")
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