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|
{ lib, config, nixpkgs, ... }:
let
pkgs = config.nodes.client.nixpkgs.pkgs;
# Generate a fake root CA and a fake api.github.com / github.com / channels.nixos.org certificate.
cert = pkgs.runCommand "cert" { nativeBuildInputs = [ pkgs.openssl ]; }
''
mkdir -p $out
openssl genrsa -out ca.key 2048
openssl req -new -x509 -days 36500 -key ca.key \
-subj "/C=NL/ST=Denial/L=Springfield/O=Dis/CN=Root CA" -out $out/ca.crt
openssl req -newkey rsa:2048 -nodes -keyout $out/server.key \
-subj "/C=CN/ST=Denial/L=Springfield/O=Dis/CN=github.com" -out server.csr
openssl x509 -req -extfile <(printf "subjectAltName=DNS:api.github.com,DNS:github.com,DNS:channels.nixos.org") \
-days 36500 -in server.csr -CA $out/ca.crt -CAkey ca.key -CAcreateserial -out $out/server.crt
'';
registry = pkgs.writeTextFile {
name = "registry";
text = ''
{
"flakes": [
{
"from": {
"type": "indirect",
"id": "nixpkgs"
},
"to": {
"type": "github",
"owner": "NixOS",
"repo": "nixpkgs"
}
},
{
"from": {
"type": "indirect",
"id": "private-flake"
},
"to": {
"type": "github",
"owner": "fancy-enterprise",
"repo": "private-flake"
}
}
],
"version": 2
}
'';
destination = "/flake-registry.json";
};
private-flake-rev = "9f1dd0df5b54a7dc75b618034482ed42ce34383d";
private-flake-api = pkgs.runCommand "private-flake" {}
''
mkdir -p $out/{commits,tarball}
# Setup https://docs.github.com/en/rest/commits/commits#get-a-commit
echo '{"sha": "${private-flake-rev}"}' > $out/commits/HEAD
# Setup tarball download via API
dir=private-flake
mkdir $dir
echo '{ outputs = {...}: {}; }' > $dir/flake.nix
tar cfz $out/tarball/${private-flake-rev} $dir --hard-dereference
'';
nixpkgs-api = pkgs.runCommand "nixpkgs-flake" {}
''
mkdir -p $out/commits
# Setup https://docs.github.com/en/rest/commits/commits#get-a-commit
echo '{"sha": "${nixpkgs.rev}"}' > $out/commits/HEAD
'';
archive = pkgs.runCommand "nixpkgs-flake" {}
''
mkdir -p $out/archive
dir=NixOS-nixpkgs-${nixpkgs.shortRev}
cp -prd ${nixpkgs} $dir
# Set the correct timestamp in the tarball.
find $dir -print0 | xargs -0 touch -h -t ${builtins.substring 0 12 nixpkgs.lastModifiedDate}.${builtins.substring 12 2 nixpkgs.lastModifiedDate} --
tar cfz $out/archive/${nixpkgs.rev}.tar.gz $dir --hard-dereference
'';
in
{
name = "github-flakes";
nodes =
{
github =
{ config, pkgs, ... }:
{ networking.firewall.allowedTCPPorts = [ 80 443 ];
services.httpd.enable = true;
services.httpd.adminAddr = "foo@example.org";
services.httpd.extraConfig = ''
ErrorLog syslog:local6
'';
services.httpd.virtualHosts."channels.nixos.org" =
{ forceSSL = true;
sslServerKey = "${cert}/server.key";
sslServerCert = "${cert}/server.crt";
servedDirs =
[ { urlPath = "/";
dir = registry;
}
];
};
services.httpd.virtualHosts."api.github.com" =
{ forceSSL = true;
sslServerKey = "${cert}/server.key";
sslServerCert = "${cert}/server.crt";
servedDirs =
[ { urlPath = "/repos/NixOS/nixpkgs";
dir = nixpkgs-api;
}
{ urlPath = "/repos/fancy-enterprise/private-flake";
dir = private-flake-api;
}
];
};
services.httpd.virtualHosts."github.com" =
{ forceSSL = true;
sslServerKey = "${cert}/server.key";
sslServerCert = "${cert}/server.crt";
servedDirs =
[ { urlPath = "/NixOS/nixpkgs";
dir = archive;
}
];
};
};
client =
{ config, lib, pkgs, nodes, ... }:
{ virtualisation.writableStore = true;
virtualisation.diskSize = 2048;
virtualisation.additionalPaths = [ pkgs.hello pkgs.fuse ];
virtualisation.memorySize = 4096;
nix.settings.substituters = lib.mkForce [ ];
nix.extraOptions = "experimental-features = nix-command flakes";
networking.hosts.${(builtins.head nodes.github.networking.interfaces.eth1.ipv4.addresses).address} =
[ "channels.nixos.org" "api.github.com" "github.com" ];
security.pki.certificateFiles = [ "${cert}/ca.crt" ];
};
};
testScript = { nodes }: ''
# fmt: off
import json
import time
start_all()
def cat_log():
github.succeed("cat /var/log/httpd/*.log >&2")
github.wait_for_unit("httpd.service")
client.succeed("curl -v https://github.com/ >&2")
out = client.succeed("nix registry list")
print(out)
assert "github:NixOS/nixpkgs" in out, "nixpkgs flake not found"
assert "github:fancy-enterprise/private-flake" in out, "private flake not found"
cat_log()
# If no github access token is provided, nix should use the public archive url...
out = client.succeed("nix flake metadata nixpkgs --json")
print(out)
info = json.loads(out)
assert info["revision"] == "${nixpkgs.rev}", f"revision mismatch: {info['revision']} != ${nixpkgs.rev}"
cat_log()
# ... otherwise it should use the API
out = client.succeed("nix flake metadata private-flake --json --access-tokens github.com=ghp_000000000000000000000000000000000000 --tarball-ttl 0")
print(out)
info = json.loads(out)
assert info["revision"] == "${private-flake-rev}", f"revision mismatch: {info['revision']} != ${private-flake-rev}"
cat_log()
client.succeed("nix registry pin nixpkgs")
client.succeed("nix flake metadata nixpkgs --tarball-ttl 0 >&2")
# Shut down the web server. The flake should be cached on the client.
github.succeed("systemctl stop httpd.service")
info = json.loads(client.succeed("nix flake metadata nixpkgs --json"))
date = time.strftime("%Y%m%d%H%M%S", time.gmtime(info['lastModified']))
assert date == "${nixpkgs.lastModifiedDate}", "time mismatch"
client.succeed("nix build nixpkgs#hello")
# The build shouldn't fail even with --tarball-ttl 0 (the server
# being down should not be a fatal error).
client.succeed("nix build nixpkgs#fuse --tarball-ttl 0")
'';
}
|
