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authorOgulcan Celik <ogulcancelik@gmail.com>2026-05-31 23:17:39 +0300
committerOgulcan Celik <ogulcancelik@gmail.com>2026-05-31 23:17:39 +0300
commit8a667f99d5a025106690c10858b5b71af15a47fc (patch)
treef07e1d233b247a7e4b40e79b1a761f7018a585fa /scripts/nix_cargo_hash.py
parent018cbfb84ad9516be3121d2264c61d9a4a3aebc1 (diff)
fix: use cargo lock for nix packaging
Diffstat (limited to 'scripts/nix_cargo_hash.py')
-rw-r--r--scripts/nix_cargo_hash.py172
1 files changed, 0 insertions, 172 deletions
diff --git a/scripts/nix_cargo_hash.py b/scripts/nix_cargo_hash.py
deleted file mode 100644
index 1e9a28f6..00000000
--- a/scripts/nix_cargo_hash.py
+++ /dev/null
@@ -1,172 +0,0 @@
-#!/usr/bin/env python3
-from __future__ import annotations
-
-import argparse
-import re
-import shutil
-import subprocess
-import sys
-from pathlib import Path
-
-
-class NixCargoHashError(ValueError):
- pass
-
-
-CARGO_HASH_RE = re.compile(
- r"(?m)^(\s*cargoHash\s*=\s*)(\"sha256-[^\"]+\"|lib\.fakeHash)(;\s*)$"
-)
-GOT_HASH_RE = re.compile(r"\bgot:\s*(sha256-[A-Za-z0-9+/=]+)")
-
-
-def find_cargo_hash_assignment(package_text: str) -> str:
- matches = list(CARGO_HASH_RE.finditer(package_text))
- if len(matches) != 1:
- raise NixCargoHashError(
- f"expected exactly one cargoHash assignment, found {len(matches)}"
- )
- return matches[0].group(2)
-
-
-def replace_cargo_hash_assignment(package_text: str, replacement: str) -> str:
- matches = list(CARGO_HASH_RE.finditer(package_text))
- if len(matches) != 1:
- raise NixCargoHashError(
- f"expected exactly one cargoHash assignment, found {len(matches)}"
- )
- return CARGO_HASH_RE.sub(
- lambda match: f"{match.group(1)}{replacement}{match.group(3)}",
- package_text,
- )
-
-
-def parse_got_hash(output: str) -> str:
- hashes = GOT_HASH_RE.findall(output)
- if len(hashes) != 1:
- raise NixCargoHashError(
- f"expected exactly one got: sha256-... hash, found {len(hashes)}"
- )
- return hashes[0]
-
-
-def run_capture(command: list[str]) -> subprocess.CompletedProcess[str]:
- return subprocess.run(
- command,
- stdout=subprocess.PIPE,
- stderr=subprocess.STDOUT,
- text=True,
- check=False,
- )
-
-
-def run_checked(command: list[str]) -> None:
- subprocess.run(command, check=True)
-
-
-def discover_cargo_hash(package_path: Path) -> tuple[str, str]:
- if shutil.which("nix") is None:
- raise NixCargoHashError("nix is required to refresh nix/package.nix cargoHash")
- if not package_path.exists():
- raise NixCargoHashError(f"{package_path} does not exist")
-
- original_text = package_path.read_text(encoding="utf-8")
- original_assignment = find_cargo_hash_assignment(original_text)
- discovered_hash: str | None = None
-
- try:
- package_path.write_text(
- replace_cargo_hash_assignment(original_text, "lib.fakeHash"),
- encoding="utf-8",
- )
-
- system = run_capture(
- ["nix", "eval", "--impure", "--raw", "--expr", "builtins.currentSystem"]
- )
- if system.returncode != 0:
- raise NixCargoHashError(
- system.stdout.strip() or "failed to read Nix currentSystem"
- )
-
- build_attr = f".#packages.{system.stdout.strip()}.herdr"
- print(f"building {build_attr} with lib.fakeHash to discover cargoHash")
- result = run_capture(["nix", "build", build_attr, "--no-link", "--print-build-logs"])
- if result.returncode == 0:
- raise NixCargoHashError(
- "nix build succeeded with lib.fakeHash; could not discover cargoHash"
- )
-
- discovered_hash = parse_got_hash(result.stdout)
- finally:
- package_path.write_text(original_text, encoding="utf-8")
-
- return discovered_hash, original_assignment
-
-
-def refresh_cargo_hash(package_path: Path) -> None:
- discovered_hash, original_assignment = discover_cargo_hash(package_path)
-
- new_assignment = f'"{discovered_hash}"'
- if new_assignment == original_assignment:
- print(f"nix/package.nix cargoHash is unchanged: {discovered_hash}")
- else:
- print(f"updating nix/package.nix cargoHash to {discovered_hash}")
- package_path.write_text(
- replace_cargo_hash_assignment(package_path.read_text(encoding="utf-8"), new_assignment),
- encoding="utf-8",
- )
-
- print("verifying Nix flake checks")
- run_checked(["nix", "flake", "check", "--print-build-logs"])
- run_checked(["nix", "flake", "check", "--all-systems", "--no-build", "--print-build-logs"])
- print("nix/package.nix cargoHash is ready")
-
-
-def check_cargo_hash(package_path: Path) -> None:
- discovered_hash, current_assignment = discover_cargo_hash(package_path)
- expected_assignment = f'"{discovered_hash}"'
- if current_assignment != expected_assignment:
- raise NixCargoHashError(
- "nix/package.nix cargoHash is stale: "
- f"expected {expected_assignment}, found {current_assignment}"
- )
- print(f"nix/package.nix cargoHash matches discovered hash: {discovered_hash}")
-
-
-def cmd_refresh(args: argparse.Namespace) -> int:
- refresh_cargo_hash(Path(args.package))
- return 0
-
-
-def cmd_check(args: argparse.Namespace) -> int:
- check_cargo_hash(Path(args.package))
- return 0
-
-
-def build_parser() -> argparse.ArgumentParser:
- parser = argparse.ArgumentParser(description="Refresh nix/package.nix cargoHash")
- subparsers = parser.add_subparsers(dest="command", required=True)
-
- check = subparsers.add_parser("check", help="Check cargoHash without patching")
- check.add_argument("--package", default="nix/package.nix")
- check.set_defaults(func=cmd_check)
-
- refresh = subparsers.add_parser("refresh", help="Refresh cargoHash using Nix")
- refresh.add_argument("--package", default="nix/package.nix")
- refresh.set_defaults(func=cmd_refresh)
-
- return parser
-
-
-def main() -> int:
- parser = build_parser()
- args = parser.parse_args()
-
- try:
- return args.func(args)
- except (NixCargoHashError, subprocess.CalledProcessError) as exc:
- print(f"error: {exc}", file=sys.stderr)
- return 1
-
-
-if __name__ == "__main__":
- raise SystemExit(main())