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selfhostblocks/modules/services/forgejo.nix

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2024-09-08 08:33:22 +02:00
{ config, options, pkgs, lib, ... }:
let
cfg = config.shb.forgejo;
contracts = pkgs.callPackage ../contracts {};
in
{
options.shb.forgejo = {
enable = lib.mkEnableOption "selfhostblocks.forgejo";
subdomain = lib.mkOption {
type = lib.types.str;
description = ''
Subdomain under which Forgejo will be served.
```
<subdomain>.<domain>[:<port>]
```
'';
example = "forgejo";
};
domain = lib.mkOption {
description = ''
Domain under which Forgejo is served.
```
<subdomain>.<domain>[:<port>]
```
'';
type = lib.types.str;
example = "domain.com";
};
ssl = lib.mkOption {
description = "Path to SSL files";
type = lib.types.nullOr contracts.ssl.certs;
default = null;
};
ldap = lib.mkOption {
description = ''
LDAP Integration.
'';
default = {};
type = lib.types.nullOr (lib.types.submodule {
options = {
enable = lib.mkEnableOption "LDAP integration.";
provider = lib.mkOption {
type = lib.types.enum [ "LLDAP" ];
description = "LDAP provider name, used for display.";
default = "LLDAP";
};
host = lib.mkOption {
type = lib.types.str;
description = ''
Host serving the LDAP server.
'';
default = "127.0.0.1";
};
port = lib.mkOption {
type = lib.types.port;
description = ''
Port of the service serving the LDAP server.
'';
default = 389;
};
dcdomain = lib.mkOption {
type = lib.types.str;
description = "dc domain for ldap.";
example = "dc=mydomain,dc=com";
};
adminName = lib.mkOption {
type = lib.types.str;
description = "Admin user of the LDAP server.";
default = "admin";
};
adminPasswordFile = lib.mkOption {
type = lib.types.path;
description = ''
File containing the admin password of the LDAP server.
Must be readable by the forgejo system user.
'';
default = "";
};
userGroup = lib.mkOption {
type = lib.types.str;
description = "Group users must belong to be able to login.";
default = "forgejo_user";
};
adminGroup = lib.mkOption {
type = lib.types.str;
description = "Group users must belong to be admins.";
default = "forgejo_admin";
};
};
});
};
sso = lib.mkOption {
description = ''
Setup SSO integration.
'';
default = {};
type = lib.types.submodule {
options = {
enable = lib.mkEnableOption "SSO integration.";
provider = lib.mkOption {
type = lib.types.enum [ "Authelia" ];
description = "OIDC provider name, used for display.";
default = "Authelia";
};
endpoint = lib.mkOption {
type = lib.types.str;
description = "OIDC endpoint for SSO.";
example = "https://authelia.example.com";
};
clientID = lib.mkOption {
type = lib.types.str;
description = "Client ID for the OIDC endpoint.";
default = "forgejo";
};
authorization_policy = lib.mkOption {
type = lib.types.enum [ "one_factor" "two_factor" ];
description = "Require one factor (password) or two factor (device) authentication.";
default = "one_factor";
};
secretFile = lib.mkOption {
type = lib.types.path;
description = ''
File containing the secret for the OIDC endpoint.
Must be readable by the forgejo system user.
'';
};
secretFileForAuthelia = lib.mkOption {
type = lib.types.path;
description = ''
File containing the secret for the OIDC endpoint, must be readable by the Authelia user.
Must be readable by the authelia system user.
'';
};
};
};
};
adminPasswordFile = lib.mkOption {
type = lib.types.path;
description = "File containing the Forgejo admin user password.";
example = "/run/secrets/forgejo/adminPassword";
};
databasePasswordFile = lib.mkOption {
type = lib.types.path;
description = "File containing the Forgejo database password.";
example = "/run/secrets/forgejo/databasePassword";
};
repositoryRoot = lib.mkOption {
type = lib.types.nullOr lib.types.str;
description = "Path where to store the repositories. If null, uses the default under the Forgejo StateDir.";
default = null;
example = "/srv/forgejo";
};
localActionRunner = lib.mkOption {
type = lib.types.bool;
default = true;
description = ''
Enable local action runner that runs for all labels.
'';
};
backup = lib.mkOption {
type = contracts.backup;
description = ''
Backup configuration. This is an output option.
Use it to initialize a block implementing the "backup" contract.
For example, with the restic block:
```
shb.restic.instances."forgejo" = {
enable = true;
# Options specific to Restic.
} // config.shb.forgejo.backup;
```
'';
readOnly = true;
default = {
user = options.services.forgejo.user.value;
sourceDirectories = [
options.services.forgejo.dump.backupDir.value
] ++ lib.optionals (cfg.repositoryRoot != null) [
cfg.repositoryRoot
];
};
};
mount = lib.mkOption {
type = contracts.mount;
description = ''
Mount configuration. This is an output option.
Use it to initialize a block implementing the "mount" contract.
For example, with a zfs dataset:
```
shb.zfs.datasets."forgejo" = {
poolName = "root";
} // config.shb.forgejo.mount;
```
'';
readOnly = true;
default = { path = config.services.forgejo.stateDir; };
};
smtp = lib.mkOption {
description = ''
Send notifications by smtp.
'';
default = null;
type = lib.types.nullOr (lib.types.submodule {
options = {
from_address = lib.mkOption {
type = lib.types.str;
description = "SMTP address from which the emails originate.";
example = "authelia@mydomain.com";
};
host = lib.mkOption {
type = lib.types.str;
description = "SMTP host to send the emails to.";
};
port = lib.mkOption {
type = lib.types.port;
description = "SMTP port to send the emails to.";
default = 25;
};
username = lib.mkOption {
type = lib.types.str;
description = "Username to connect to the SMTP host.";
};
passwordFile = lib.mkOption {
type = lib.types.str;
description = "File containing the password to connect to the SMTP host.";
};
};
});
};
debug = lib.mkOption {
description = "Enable debug logging.";
type = lib.types.bool;
default = false;
};
};
config = lib.mkMerge [
(lib.mkIf cfg.enable {
services.forgejo = {
enable = true;
repositoryRoot = lib.mkIf (cfg.repositoryRoot != null) cfg.repositoryRoot;
settings = {
server = {
DOMAIN = cfg.domain;
PROTOCOL = "http+unix";
ROOT_URL = "https://${cfg.subdomain}.${cfg.domain}/";
};
service.DISABLE_REGISTRATION = true;
log.LEVEL = if cfg.debug then "Debug" else "Info";
cron = {
ENABLE = true;
RUN_AT_START = true;
SCHEDULE = "@every 1h";
};
};
};
# 1 lower than default, to solve conflict between shb.postgresql and nixpkgs' forgejo module.
services.postgresql.enable = lib.mkOverride 999 true;
# https://github.com/NixOS/nixpkgs/issues/258371#issuecomment-2271967113
systemd.services.forgejo.serviceConfig.Type = lib.mkForce "exec";
shb.nginx.vhosts = [{
inherit (cfg) domain subdomain ssl;
upstream = "http://unix:${config.services.forgejo.settings.server.HTTP_ADDR}";
}];
})
(lib.mkIf cfg.enable {
services.forgejo.database = {
type = "postgres";
passwordFile = cfg.databasePasswordFile;
};
})
(lib.mkIf cfg.enable {
services.forgejo.dump = {
enable = true;
type = "tar.gz";
interval = "hourly";
};
})
# For Forgejo setup: https://github.com/lldap/lldap/blob/main/example_configs/gitea.md
# For cli info: https://docs.gitea.com/usage/command-line
# Security protocols in: https://codeberg.org/forgejo/forgejo/src/branch/forgejo/services/auth/source/ldap/security_protocol.go#L27-L31
(lib.mkIf (cfg.enable && cfg.ldap.enable != false) {
# The delimiter in the `cut` command is a TAB!
systemd.services.forgejo.preStart = let
provider = "SHB-${cfg.ldap.provider}";
in ''
auth="${lib.getExe config.services.forgejo.package} admin auth"
echo "Trying to find existing ldap configuration for ${provider}"...
set +e -o pipefail
id="$($auth list | grep "${provider}.*LDAP" | cut -d' ' -f1)"
found=$?
set -e +o pipefail
if [[ $found = 0 ]]; then
echo Found ldap configuration at id=$id, updating it if needed.
$auth update-ldap \
--id $id \
--name ${provider} \
--host ${cfg.ldap.host} \
--port ${toString cfg.ldap.port} \
--bind-dn uid=${cfg.ldap.adminName},ou=people,${cfg.ldap.dcdomain} \
--bind-password $(tr -d '\n' < ${cfg.ldap.adminPasswordFile}) \
--security-protocol Unencrypted \
--user-search-base ou=people,${cfg.ldap.dcdomain} \
--user-filter '(&(memberof=cn=${cfg.ldap.userGroup},ou=groups,${cfg.ldap.dcdomain})(|(uid=%[1]s)(mail=%[1]s)))' \
--admin-filter '(memberof=cn=${cfg.ldap.adminGroup},ou=groups,${cfg.ldap.dcdomain})' \
--username-attribute uid \
--firstname-attribute givenName \
--surname-attribute sn \
--email-attribute mail \
--avatar-attribute jpegPhoto \
--synchronize-users
echo "Done updating LDAP configuration."
else
echo Did not find any ldap configuration, creating one with name ${provider}.
$auth add-ldap \
--name ${provider} \
--host ${cfg.ldap.host} \
--port ${toString cfg.ldap.port} \
--bind-dn uid=${cfg.ldap.adminName},ou=people,${cfg.ldap.dcdomain} \
--bind-password $(tr -d '\n' < ${cfg.ldap.adminPasswordFile}) \
--security-protocol Unencrypted \
--user-search-base ou=people,${cfg.ldap.dcdomain} \
--user-filter '(&(memberof=cn=${cfg.ldap.userGroup},ou=groups,${cfg.ldap.dcdomain})(|(uid=%[1]s)(mail=%[1]s)))' \
--admin-filter '(memberof=cn=${cfg.ldap.adminGroup},ou=groups,${cfg.ldap.dcdomain})' \
--username-attribute uid \
--firstname-attribute givenName \
--surname-attribute sn \
--email-attribute mail \
--avatar-attribute jpegPhoto \
--synchronize-users
echo "Done adding LDAP configuration."
fi
'';
})
# For Authelia to Forgejo integration: https://www.authelia.com/integration/openid-connect/gitea/
# For Forgejo config: https://forgejo.org/docs/latest/admin/config-cheat-sheet
# For cli info: https://docs.gitea.com/usage/command-line
(lib.mkIf (cfg.enable && cfg.sso.enable != false) {
services.forgejo.settings = {
oauth2 = {
ENABLED = true;
};
openid = {
ENABLE_OPENID_SIGNIN = false;
ENABLE_OPENID_SIGNUP = true;
WHITELISTED_URIS = cfg.sso.endpoint;
};
service = {
# DISABLE_REGISTRATION = lib.mkForce false;
# ALLOW_ONLY_EXTERNAL_REGISTRATION = false;
SHOW_REGISTRATION_BUTTON = false;
};
};
# The delimiter in the `cut` command is a TAB!
systemd.services.forgejo.preStart = let
provider = "SHB-${cfg.sso.provider}";
in ''
auth="${lib.getExe config.services.forgejo.package} admin auth"
echo "Trying to find existing sso configuration for ${provider}"...
set +e -o pipefail
id="$($auth list | grep "${provider}.*OAuth2" | cut -d' ' -f1)"
found=$?
set -e +o pipefail
if [[ $found = 0 ]]; then
echo Found sso configuration at id=$id, updating it if needed.
$auth update-oauth \
--id $id \
--name ${provider} \
--provider openidConnect \
--key forgejo \
--secret $(tr -d '\n' < ${cfg.sso.secretFile}) \
--auto-discover-url ${cfg.sso.endpoint}/.well-known/openid-configuration
else
echo Did not find any sso configuration, creating one with name ${provider}.
$auth add-oauth \
--name ${provider} \
--provider openidConnect \
--key forgejo \
--secret $(tr -d '\n' < ${cfg.sso.secretFile}) \
--auto-discover-url ${cfg.sso.endpoint}/.well-known/openid-configuration
fi
'';
shb.authelia.oidcClients = lib.lists.optionals (!(isNull cfg.sso)) [
(let
provider = "SHB-${cfg.sso.provider}";
in {
client_id = cfg.sso.clientID;
client_name = "Forgejo";
client_secret.source = cfg.sso.secretFileForAuthelia;
public = false;
authorization_policy = cfg.sso.authorization_policy;
redirect_uris = [ "https://${cfg.subdomain}.${cfg.domain}/user/oauth2/${provider}/callback" ];
})
];
})
(lib.mkIf cfg.enable {
systemd.services.forgejo.preStart = ''
admin="${lib.getExe config.services.forgejo.package} admin user"
$admin create --admin --email "root@localhost" --username meadmin --password "$(tr -d '\n' < ${cfg.adminPasswordFile})" || true
$admin change-password --username meadmin --password "$(tr -d '\n' < ${cfg.adminPasswordFile})" || true
'';
})
(lib.mkIf (cfg.enable && cfg.smtp != null) {
services.forgejo.settings.mailer = {
ENABLED = true;
SMTP_ADDR = "${cfg.smtp.host}:${toString cfg.smtp.port}";
FROM = cfg.smtp.from_address;
USER = cfg.smtp.username;
};
services.forgejo.mailerPasswordFile = cfg.smtp.passwordFile;
})
# https://wiki.nixos.org/wiki/Forgejo#Runner
(lib.mkIf cfg.enable {
services.forgejo.settings.actions = {
ENABLED = true;
DEFAULT_ACTIONS_URL = "github";
};
services.gitea-actions-runner = lib.mkIf cfg.localActionRunner {
package = pkgs.forgejo-actions-runner;
instances.local = {
enable = true;
name = "local";
url = let
protocol = if cfg.ssl != null then "https" else "http";
in "${protocol}://${cfg.subdomain}.${cfg.domain}";
tokenFile = ""; # Empty variable to satisfy an assertion.
labels = [
# "ubuntu-latest:docker://node:16-bullseye"
# "ubuntu-22.04:docker://node:16-bullseye"
# "ubuntu-20.04:docker://node:16-bullseye"
# "ubuntu-18.04:docker://node:16-buster"
"native:host"
];
};
};
# This combined with the next statement takes care of
# automatically registering a forgejo runner.
systemd.services.forgejo.postStart = lib.mkIf cfg.localActionRunner (lib.mkBefore ''
${pkgs.bash}/bin/bash -c '(while ! ${pkgs.netcat-openbsd}/bin/nc -z -U ${config.services.forgejo.settings.server.HTTP_ADDR}; do echo "Waiting for unix ${config.services.forgejo.settings.server.HTTP_ADDR} to open..."; sleep 2; done); sleep 2'
actions="${lib.getExe config.services.forgejo.package} actions"
echo -n TOKEN= > /run/forgejo/forgejo-runner-token
$actions generate-runner-token >> /run/forgejo/forgejo-runner-token
'');
systemd.services.gitea-runner-local.serviceConfig = {
# LoadCredential = "TOKEN_FILE:/run/forgejo/forgejo-runner-token";
# EnvironmentFile = [ "$CREDENTIALS_DIRECTORY/TOKEN_FILE" ];
EnvironmentFile = [ "/run/forgejo/forgejo-runner-token" ];
};
systemd.services.gitea-runner-local.wants = [ "forgejo.service" ];
systemd.services.gitea-runner-local.after = [ "forgejo.service" ];
})
];
}