nixos-config/pkgs/deploy/deploy.py
2023-07-07 14:58:58 -04:00

183 lines
4.3 KiB
Python
Executable file

#!/usr/bin/env python3
from json import loads
from os import readlink
from string import ascii_letters, digits
from subprocess import run, PIPE, STDOUT
from sys import argv
def get_deployment():
return loads(
run(
[
"nix",
"eval",
"--json",
"--apply",
"builtins.mapAttrs (n: v: v.config.deploy)",
".#nixosConfigurations",
],
stdout=PIPE,
check=True,
).stdout
)
def expand(ln):
hosts = set()
for item in ln.split(","):
if item == "all":
hosts.update(depl)
elif item in tags:
hosts.update(name for name in depl if item in depl[name]["tags"])
else:
hosts.add(item)
for host in hosts:
for c in host:
if not c in (ascii_letters + digits + "-"):
raise RuntimeError(f"Invalid hostname: {host}")
return sorted(hosts)
def build_system(name):
return loads(
run(
[
"nix",
"build",
"--no-link",
"--json",
f".#nixosConfigurations.{name}.config.system.build.toplevel",
],
stdout=PIPE,
check=True,
).stdout
)[0]["outputs"]["out"]
def build_all(hosts):
return dict([x, build_system(x)] for x in hosts)
def apply(goal, hosts):
for host in hosts:
print(f"\n\n{goal} on {host}...\n")
run(
[
"nixos-rebuild",
goal,
"--use-substitutes",
"--use-remote-sudo",
"--target-host",
host,
"--flake",
".#" + host,
],
check=True,
)
def check(hosts):
hostwidth = max(map(len, hosts))
new_sys = build_all(hosts)
print("#" * 64)
for host in hosts:
current_sys, cur_kernel, boot_kernel = (
run(
[
"ssh",
host,
"readlink",
"/run/current-system",
"/run/current-system/kernel",
"/run/booted-system/kernel",
],
stdout=PIPE,
check=True,
)
.stdout.decode("ascii")
.strip()
.split("\n")
)
reboot_needed = cur_kernel != boot_kernel
update_needed = current_sys != new_sys[host]
print(host.rjust(hostwidth + 1), end=" ")
if not (reboot_needed or update_needed):
print(icon_good, "[OK]")
continue
print(icon_bad, end=" ")
if update_needed:
print("[UPDATE REQUIRED]", end=" ")
if readlink(new_sys[host] + "/kernel") != boot_kernel:
print("[UPDATE REQUIRES REBOOT]", end=" ")
if reboot_needed:
print("[REBOOT REQUIRED]", end=" ")
print()
print("#" * 64)
def push(hosts):
new_sys = build_all(hosts)
for host in hosts:
print(f"Pushing to {host}...")
run(
[
"nix",
"copy",
new_sys[host],
"--to",
"ssh://" + host,
],
check=True,
)
def rexec(hosts, cmd):
hostwidth = max(map(len, hosts))
for host in hosts:
r = run(["ssh", host, "--"] + cmd, stdout=PIPE, stderr=STDOUT)
lines = r.stdout.decode("utf8").strip("\n").splitlines()
print(host.rjust(hostwidth), end=" ")
print(icon_bad if r.returncode else icon_good, end=" ")
if len(lines) == 1:
print(lines[0])
else:
print()
for ln in lines:
print(" " * hostwidth, ln)
def main():
op = argv[1]
hosts = expand(argv[2])
args = argv[3:]
if op in ["boot", "switch", "test"]:
apply(op, hosts)
elif op == "check":
check(hosts)
elif op == "push":
push(hosts)
elif op == "exec":
rexec(hosts, args)
else:
print("Invalid op:", op)
icon_bad = "\u274c"
icon_good = "\u2705"
depl = get_deployment()
tags = set(sum([depl[name]["tags"] for name in depl], []))
if __name__ == "__main__":
main()