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feat(site): generate systemd services for preview sites

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This commit is contained in:
Lewis Wynne 2026-04-07 23:06:24 +01:00
parent 6fe4bced45
commit 1bfd0b9f42
1 changed files with 65 additions and 3 deletions
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68
modules/site.nix
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@ -234,7 +234,63 @@ in
};
};
}
) cfg) ++ [{
) cfg) ++ (mapAttrsToList (name: site:
let
h = siteHelpers name site;
previewDataDir = "/srv/${name}-preview";
previewUser = "${name}-preview";
in {
"${name}-preview-rebuild" = {
description = "Clone/pull and build preview of ${site.domain}";
after = [ "network-online.target" ] ++ site.afterServices;
path = [ pkgs.nodejs pkgs.bash ]
++ optional (site.packageManager == "pnpm") pkgs.pnpm;
environment = site.buildEnvironment;
wants = [ "network-online.target" ];
wantedBy = [ "multi-user.target" ];
serviceConfig = {
Type = "oneshot";
RemainAfterExit = false;
ExecStartPre = "+${pkgs.writeShellScript "prepare-${name}-preview" ''
mkdir -p ${previewDataDir}
chown -R ${previewUser}:${previewUser} ${previewDataDir}
''}";
ExecStart = pkgs.writeShellScript "rebuild-${name}-preview" ''
set -euo pipefail
if [ ! -d ${previewDataDir}/repo/.git ]; then
${pkgs.git}/bin/git clone ${site.repo} ${previewDataDir}/repo
fi
cd ${previewDataDir}/repo
${pkgs.git}/bin/git fetch origin
${pkgs.git}/bin/git reset --hard origin/${site.preview.branch}
${h.installCmd}
${h.pmBin} run build
'';
ExecStartPost = lib.mkIf (!site.static)
"+/run/current-system/sw/bin/systemctl restart ${previewUser}";
User = previewUser;
Group = previewUser;
};
};
} // lib.optionalAttrs (!site.static) {
${previewUser} = {
description = "Preview of ${site.domain}";
environment = {
HOST = "127.0.0.1";
PORT = toString site.preview.port;
} // site.environment;
serviceConfig = {
Type = "simple";
WorkingDirectory = "${previewDataDir}/repo";
ExecStart = "${pkgs.nodejs}/bin/node ${site.entryPoint}";
Restart = "on-failure";
User = previewUser;
Group = previewUser;
ReadWritePaths = site.readWritePaths;
};
};
}
) previewCfg) ++ [{
site-webhook = mkIf (cfg != {}) {
description = "Webhook listener for site rebuilds";
after = [ "network.target" ];
@ -242,13 +298,19 @@ in
serviceConfig = {
Type = "simple";
ExecStart = let
allHooks = mapAttrsToList (name: site: {
allHooks = (mapAttrsToList (name: site: {
id = "${name}-rebuild";
execute-command = "/run/current-system/sw/bin/touch";
pass-arguments-to-command = [
{ source = "string"; name = "/run/site-rebuild/${name}"; }
];
}) cfg;
}) cfg) ++ (mapAttrsToList (name: site: {
id = "${name}-preview-rebuild";
execute-command = "/run/current-system/sw/bin/touch";
pass-arguments-to-command = [
{ source = "string"; name = "/run/site-rebuild/${name}-preview"; }
];
}) previewCfg);
hooksFile = pkgs.writeText "site-hooks.json" (builtins.toJSON allHooks);
in "${pkgs.webhook}/bin/webhook -hooks ${hooksFile} -port ${toString webhookPort} -verbose";
Restart = "always";