Hi,
I want to share my current configuration that I use for developping with php.
For context, I discovered NixOS in June 2022, just 10 months ago, and I had to re-wire my 57 year old brain to be able to understand functional programming 
I sometimes work with legacy code, so I need to be able to use old php versions that are not maintenaid anymore. Thanks to GitHub - fossar/nix-phps: Repository of Nix expressions for old PHP versions this is very easy to do (once you understand how to use it).
I also want to thank all the people who have helped me on this forum, and all the people who post videos, blog posts etc that relate to nixos.
I couldn’t have done it without you all
And finally my nix configuration, I hope this will help newbies like me.
{ pkgs, config, lib, ... }:
let
# using pkgs2 to avoid recursive loop with fetchFromGitHub
# see https://stackoverflow.com/questions/73097604/nixos-how-to-import-some-configuration-from-gitlab-infinite-recursion-encounte
pkgs2 = (import <nixpkgs> { });
nix-phps = pkgs2.fetchFromGitHub {
owner = "fossar";
repo = "nix-phps";
rev = "ac2bb3d416a10fc66d0148dddc63a19c6c5a907c";
hash = "sha256-74kQIFf3Cu1aeOsohCiLuA1aXNGYt2U9tTUP0yvm4EA=";
};
phps = import nix-phps;
# phpfpm pools with php version from nix-phps
mkPhpFpm = phpXX:
{
name = phpXX;
value = {
user = config.services.caddy.user;
group = config.services.caddy.group;
phpPackage = phps.packages.${builtins.currentSystem}.${phpXX}.buildEnv {
extensions = ({ enabled, all }: enabled ++ (with all; [
xdebug
]));
extraConfig = ''
'';
};
settings = {
"listen.owner" = config.services.caddy.user;
"pm" = "dynamic";
"pm.max_children" = 75;
"pm.start_servers" = 10;
"pm.min_spare_servers" = 5;
"pm.max_spare_servers" = 20;
"pm.max_requests" = 500;
};
phpOptions = ''
display_errors = on
error_reporting = E_ALL
'';
};
};
phpfpmPools = builtins.listToAttrs (builtins.map mkPhpFpm [ "php73" "php74" "php80" "php81" ]);
# caddy virtual hosts
mkDot = list: (builtins.concatStringsSep "." list);
mkVhost = { phpXX, root, sub }: rec {
name = (mkDot [ sub phpXX "localhost" ]);
value = {
extraConfig =
''
root * /var/www/${root}
file_server browse
php_fastcgi unix/${config.services.phpfpm.pools.${phpXX}.socket}
'';
};
};
caddyLocalRootCert = builtins.readFile ./../_local/caddy.root.cert.pem;
localDevConfig = builtins.fromJSON (builtins.readFile ./../_local/devconfig.json);
caddyVhosts = builtins.listToAttrs (builtins.map mkVhost localDevConfig.hosts);
# hosts.json example
# {
# "hosts":
# [
# { "sub": "project1", "phpXX": "php73", "root": "/project1/public" },
# { "sub": "project2", "phpXX": "php81", "root": "/project2/www" }
# ],
# "databases": [ "db1", "db2"]
# }
in
{
# mailhog
services.mailhog = {
enable = true;
};
# databases
services.mysql = {
enable = true;
package = pkgs.mariadb;
ensureDatabases = localDevConfig.databases;
initialScript = pkgs.writeText "mysql-init.sql" ''
CREATE USER 'devuser'@'localhost' IDENTIFIED BY 'devpwd';
GRANT ALL PRIVILEGES ON *.* TO 'devuser'@'localhost';
FLUSH PRIVILEGES;
'';
};
services.postgresql = {
enable = true;
};
# phpfpm
services.phpfpm.pools = phpfpmPools;
# caddy webserver
networking.firewall.allowedTCPPorts = [ 80 443 ];
services.caddy = {
enable = true;
virtualHosts = caddyVhosts;
};
# caddy localhost root certificate
security.pki.certificates = [ caddyLocalRootCert ];
}