treewide: Fix all Nix ASTs in all markdown files

This allows for correct highlighting and maybe future automatic
formatting. The AST was verified to work with nixfmt only.

3 files changed, 36 insertions, 12 deletions

diff --git a/nixos/modules/services/databases/foundationdb.md b/nixos/modules/services/databases/foundationdb.md
index af17c9f959994..9f7addc9c140c 100644
--- a/nixos/modules/services/databases/foundationdb.md
+++ b/nixos/modules/services/databases/foundationdb.md
@@ -16,8 +16,10 @@ key-value store.
 To enable FoundationDB, add the following to your
 {file}`configuration.nix`:
 ```nix
-services.foundationdb.enable = true;
-services.foundationdb.package = pkgs.foundationdb71; # FoundationDB 7.1.x
+{
+  services.foundationdb.enable = true;
+  services.foundationdb.package = pkgs.foundationdb71; # FoundationDB 7.1.x
+}
 ```
 
 The {option}`services.foundationdb.package` option is required, and
@@ -110,7 +112,9 @@ FoundationDB stores all data for all server processes under
 {file}`/var/lib/foundationdb`. You can override this using
 {option}`services.foundationdb.dataDir`, e.g.
 ```nix
-services.foundationdb.dataDir = "/data/fdb";
+{
+  services.foundationdb.dataDir = "/data/fdb";
+}
 ```
 
 Similarly, logs are stored under {file}`/var/log/foundationdb`
@@ -266,7 +270,9 @@ For example, to create backups in {command}`/opt/fdb-backups`, first
 set up the paths in the module options:
 
 ```nix
-services.foundationdb.extraReadWritePaths = [ "/opt/fdb-backups" ];
+{
+  services.foundationdb.extraReadWritePaths = [ "/opt/fdb-backups" ];
+}
 ```
 
 Restart the FoundationDB service, and it will now be able to write to this
diff --git a/nixos/modules/services/databases/postgresql.md b/nixos/modules/services/databases/postgresql.md
index ce1f2856b0197..6cce8f542a532 100644
--- a/nixos/modules/services/databases/postgresql.md
+++ b/nixos/modules/services/databases/postgresql.md
@@ -16,8 +16,10 @@ PostgreSQL is an advanced, free relational database.
 
 To enable PostgreSQL, add the following to your {file}`configuration.nix`:
 ```nix
-services.postgresql.enable = true;
-services.postgresql.package = pkgs.postgresql_15;
+{
+  services.postgresql.enable = true;
+  services.postgresql.package = pkgs.postgresql_15;
+}
 ```
 Note that you are required to specify the desired version of PostgreSQL (e.g. `pkgs.postgresql_15`). Since upgrading your PostgreSQL version requires a database dump and reload (see below), NixOS cannot provide a default value for [](#opt-services.postgresql.package) such as the most recent release of PostgreSQL.
 
@@ -36,7 +38,9 @@ alice=>
 
 By default, PostgreSQL stores its databases in {file}`/var/lib/postgresql/$psqlSchema`. You can override this using [](#opt-services.postgresql.dataDir), e.g.
 ```nix
-services.postgresql.dataDir = "/data/postgresql";
+{
+  services.postgresql.dataDir = "/data/postgresql";
+}
 ```
 
 ## Initializing {#module-services-postgres-initializing}
@@ -95,16 +99,19 @@ databases from `ensureDatabases` and `extraUser1` from `ensureUsers`
 are already created.
 
 ```nix
+  {
     systemd.services.postgresql.postStart = lib.mkAfter ''
       $PSQL service1 -c 'GRANT SELECT ON ALL TABLES IN SCHEMA public TO "extraUser1"'
       $PSQL service1 -c 'GRANT SELECT ON ALL SEQUENCES IN SCHEMA public TO "extraUser1"'
       # ....
     '';
+  }
 ```
 
 ##### in intermediate oneshot service {#module-services-postgres-initializing-extra-permissions-superuser-oneshot}
 
 ```nix
+  {
     systemd.services."migrate-service1-db1" = {
       serviceConfig.Type = "oneshot";
       requiredBy = "service1.service";
@@ -119,6 +126,7 @@ are already created.
         # ....
       '';
     };
+  }
 ```
 
 #### as service user {#module-services-postgres-initializing-extra-permissions-service-user}
@@ -130,6 +138,7 @@ are already created.
 ##### in service `preStart` {#module-services-postgres-initializing-extra-permissions-service-user-pre-start}
 
 ```nix
+  {
     environment.PSQL = "psql --port=${toString services.postgresql.port}";
     path = [ postgresql ];
     systemd.services."service1".preStart = ''
@@ -137,11 +146,13 @@ are already created.
       $PSQL -c 'GRANT SELECT ON ALL SEQUENCES IN SCHEMA public TO "extraUser1"'
       # ....
     '';
+  }
 ```
 
 ##### in intermediate oneshot service {#module-services-postgres-initializing-extra-permissions-service-user-oneshot}
 
 ```nix
+  {
     systemd.services."migrate-service1-db1" = {
       serviceConfig.Type = "oneshot";
       requiredBy = "service1.service";
@@ -156,6 +167,7 @@ are already created.
         # ....
       '';
     };
+  }
 ```
 
 ## Upgrading {#module-services-postgres-upgrading}
@@ -257,11 +269,13 @@ postgresql_15.pkgs.pg_partman        postgresql_15.pkgs.pgroonga
 
 To add plugins via NixOS configuration, set `services.postgresql.extraPlugins`:
 ```nix
-services.postgresql.package = pkgs.postgresql_12;
-services.postgresql.extraPlugins = ps: with ps; [
-  pg_repack
-  postgis
-];
+{
+  services.postgresql.package = pkgs.postgresql_12;
+  services.postgresql.extraPlugins = ps: with ps; [
+    pg_repack
+    postgis
+  ];
+}
 ```
 
 You can build custom PostgreSQL-with-plugins (to be used outside of NixOS) using function `.withPackages`. For example, creating a custom PostgreSQL package in an overlay can look like:
diff --git a/nixos/modules/services/databases/tigerbeetle.md b/nixos/modules/services/databases/tigerbeetle.md
index ed05c982350de..12d920e7bcc77 100644
--- a/nixos/modules/services/databases/tigerbeetle.md
+++ b/nixos/modules/services/databases/tigerbeetle.md
@@ -8,7 +8,9 @@ TigerBeetle is a distributed financial accounting database designed for mission
 
 To enable TigerBeetle, add the following to your {file}`configuration.nix`:
 ```nix
+{
   services.tigerbeetle.enable = true;
+}
 ```
 
 When first started, the TigerBeetle service will create its data file at {file}`/var/lib/tigerbeetle` unless the file already exists, in which case it will just use the existing file.
@@ -21,12 +23,14 @@ To configure it to listen on a different interface (and to configure it to conne
 Note that the TigerBeetle module won't open any firewall ports automatically, so if you configure it to listen on an external interface, you'll need to ensure that connections can reach it:
 
 ```nix
+{
   services.tigerbeetle = {
     enable = true;
     addresses = [ "0.0.0.0:3001" ];
   };
 
   networking.firewall.allowedTCPPorts = [ 3001 ];
+}
 ```
 
 A complete list of options for TigerBeetle can be found [here](#opt-services.tigerbeetle.enable).