nixos/programs: invariant option docs MD conversions

nixos/modules/programs/atop.nix

···
         type = types.package;
         default = pkgs.atop;
         defaultText = literalExpression "pkgs.atop";
-        description = ''
+        description = lib.mdDoc ''
           Which package to use for Atop.
         '';
       };
···
         enable = mkOption {
           type = types.bool;
           default = false;
-          description = ''
+          description = lib.mdDoc ''
             Whether to install and enable the netatop kernel module.
             Note: this sets the kernel taint flag "O" for loading out-of-tree modules.
           '';
···
           type = types.package;
           default = config.boot.kernelPackages.netatop;
           defaultText = literalExpression "config.boot.kernelPackages.netatop";
-          description = ''
+          description = lib.mdDoc ''
             Which package to use for netatop.
           '';
         };
···
       atopgpu.enable = mkOption {
         type = types.bool;
         default = false;
-        description = ''
+        description = lib.mdDoc ''
           Whether to install and enable the atopgpud daemon to get information about
           NVIDIA gpus.
         '';
···
       setuidWrapper.enable = mkOption {
         type = types.bool;
         default = false;
-        description = ''
+        description = lib.mdDoc ''
           Whether to install a setuid wrapper for Atop. This is required to use some of
           the features as non-root user (e.g.: ipc information, netatop, atopgpu).
           Atop tries to drop the root privileges shortly after starting.
···
       atopService.enable = mkOption {
         type = types.bool;
         default = true;
-        description = ''
+        description = lib.mdDoc ''
           Whether to enable the atop service responsible for storing statistics for
           long-term analysis.
         '';
···
       atopRotateTimer.enable = mkOption {
         type = types.bool;
         default = true;
-        description = ''
+        description = lib.mdDoc ''
           Whether to enable the atop-rotate timer, which restarts the atop service
           daily to make sure the data files are rotate.
         '';
···
       atopacctService.enable = mkOption {
         type = types.bool;
         default = true;
-        description = ''
+        description = lib.mdDoc ''
           Whether to enable the atopacct service which manages process accounting.
           This allows Atop to gather data about processes that disappeared in between
           two refresh intervals.
···
           flags = "a1f";
           interval = 5;
         };
-        description = ''
-          Parameters to be written to <filename>/etc/atoprc</filename>.
+        description = lib.mdDoc ''
+          Parameters to be written to {file}`/etc/atoprc`.
         '';
       };
     };

nixos/modules/programs/bash/bash.nix

···
       /*
       enable = mkOption {
         default = true;
-        description = ''
+        description = lib.mdDoc ''
           Whenever to configure Bash as an interactive shell.
           Note that this tries to make Bash the default
-          <option>users.defaultUserShell</option>,
+          {option}`users.defaultUserShell`,
           which in turn means that you might need to explicitly
           set this variable if you have another shell configured
           with NixOS.
···
 
       shellAliases = mkOption {
         default = {};
-        description = ''
-          Set of aliases for bash shell, which overrides <option>environment.shellAliases</option>.
-          See <option>environment.shellAliases</option> for an option format description.
+        description = lib.mdDoc ''
+          Set of aliases for bash shell, which overrides {option}`environment.shellAliases`.
+          See {option}`environment.shellAliases` for an option format description.
         '';
         type = with types; attrsOf (nullOr (either str path));
       };
 
       shellInit = mkOption {
         default = "";
-        description = ''
+        description = lib.mdDoc ''
           Shell script code called during bash shell initialisation.
         '';
         type = types.lines;
···
 
       loginShellInit = mkOption {
         default = "";
-        description = ''
+        description = lib.mdDoc ''
           Shell script code called during login bash shell initialisation.
         '';
         type = types.lines;
···
 
       interactiveShellInit = mkOption {
         default = "";
-        description = ''
+        description = lib.mdDoc ''
           Shell script code called during interactive bash shell initialisation.
         '';
         type = types.lines;
···
             fi
           fi
         '';
-        description = ''
+        description = lib.mdDoc ''
           Shell script code used to initialise the bash prompt.
         '';
         type = types.lines;
···
 
       promptPluginInit = mkOption {
         default = "";
-        description = ''
+        description = lib.mdDoc ''
           Shell script code used to initialise bash prompt plugins.
         '';
         type = types.lines;

nixos/modules/programs/dconf.nix

···
       profiles = mkOption {
         type = types.attrsOf types.path;
         default = {};
-        description = "Set of dconf profile files, installed at <filename>/etc/dconf/profiles/<replaceable>name</replaceable></filename>.";
+        description = lib.mdDoc "Set of dconf profile files, installed at {file}`/etc/dconf/profiles/«name»`.";
         internal = true;
       };
 
       packages = mkOption {
         type = types.listOf types.package;
         default = [];
-        description = "A list of packages which provide dconf profiles and databases in <filename>/etc/dconf</filename>.";
+        description = lib.mdDoc "A list of packages which provide dconf profiles and databases in {file}`/etc/dconf`.";
       };
     };
   };

nixos/modules/programs/fish.nix

···
 
       enable = mkOption {
         default = false;
-        description = ''
+        description = lib.mdDoc ''
           Whether to configure fish as an interactive shell.
         '';
         type = types.bool;
···
       useBabelfish = mkOption {
         type = types.bool;
         default = false;
-        description = ''
-          If enabled, the configured environment will be translated to native fish using <link xlink:href="https://github.com/bouk/babelfish">babelfish</link>.
-          Otherwise, <link xlink:href="https://github.com/oh-my-fish/plugin-foreign-env">foreign-env</link> will be used.
+        description = lib.mdDoc ''
+          If enabled, the configured environment will be translated to native fish using [babelfish](https://github.com/bouk/babelfish).
+          Otherwise, [foreign-env](https://github.com/oh-my-fish/plugin-foreign-env) will be used.
         '';
       };
 
       vendor.config.enable = mkOption {
         type = types.bool;
         default = true;
-        description = ''
+        description = lib.mdDoc ''
           Whether fish should source configuration snippets provided by other packages.
         '';
       };
···
       vendor.completions.enable = mkOption {
         type = types.bool;
         default = true;
-        description = ''
+        description = lib.mdDoc ''
           Whether fish should use completion files provided by other packages.
         '';
       };
···
       vendor.functions.enable = mkOption {
         type = types.bool;
         default = true;
-        description = ''
+        description = lib.mdDoc ''
           Whether fish should autoload fish functions provided by other packages.
         '';
       };
···
           gco = "git checkout";
           npu = "nix-prefetch-url";
         };
-        description = ''
+        description = lib.mdDoc ''
           Set of fish abbreviations.
         '';
         type = with types; attrsOf str;
···
 
       shellAliases = mkOption {
         default = {};
-        description = ''
-          Set of aliases for fish shell, which overrides <option>environment.shellAliases</option>.
-          See <option>environment.shellAliases</option> for an option format description.
+        description = lib.mdDoc ''
+          Set of aliases for fish shell, which overrides {option}`environment.shellAliases`.
+          See {option}`environment.shellAliases` for an option format description.
         '';
         type = with types; attrsOf (nullOr (either str path));
       };
 
       shellInit = mkOption {
         default = "";
-        description = ''
+        description = lib.mdDoc ''
           Shell script code called during fish shell initialisation.
         '';
         type = types.lines;
···
 
       loginShellInit = mkOption {
         default = "";
-        description = ''
+        description = lib.mdDoc ''
           Shell script code called during fish login shell initialisation.
         '';
         type = types.lines;
···
 
       interactiveShellInit = mkOption {
         default = "";
-        description = ''
+        description = lib.mdDoc ''
           Shell script code called during interactive fish shell initialisation.
         '';
         type = types.lines;
···
 
       promptInit = mkOption {
         default = "";
-        description = ''
+        description = lib.mdDoc ''
           Shell script code used to initialise fish prompt.
         '';
         type = types.lines;

nixos/modules/programs/less.nix

···
         type = types.nullOr types.path;
         default = null;
         example = literalExpression ''"''${pkgs.my-configs}/lesskey"'';
-        description = ''
+        description = lib.mdDoc ''
           Path to lesskey configuration file.
 
-          <option>configFile</option> takes precedence over <option>commands</option>,
-          <option>clearDefaultCommands</option>, <option>lineEditingKeys</option>, and
-          <option>envVariables</option>.
+          {option}`configFile` takes precedence over {option}`commands`,
+          {option}`clearDefaultCommands`, {option}`lineEditingKeys`, and
+          {option}`envVariables`.
         '';
       };
 
···
           h = "noaction 5\\e(";
           l = "noaction 5\\e)";
         };
-        description = "Defines new command keys.";
+        description = lib.mdDoc "Defines new command keys.";
       };
 
       clearDefaultCommands = mkOption {
         type = types.bool;
         default = false;
-        description = ''
+        description = lib.mdDoc ''
           Clear all default commands.
           You should remember to set the quit key.
           Otherwise you will not be able to leave less without killing it.
···
         example = {
           e = "abort";
         };
-        description = "Defines new line-editing keys.";
+        description = lib.mdDoc "Defines new line-editing keys.";
       };
 
       envVariables = mkOption {
···
         example = {
           LESS = "--quit-if-one-screen";
         };
-        description = "Defines environment variables.";
+        description = lib.mdDoc "Defines environment variables.";
       };
 
       lessopen = mkOption {
         type = types.nullOr types.str;
         default = "|${pkgs.lesspipe}/bin/lesspipe.sh %s";
         defaultText = literalExpression ''"|''${pkgs.lesspipe}/bin/lesspipe.sh %s"'';
-        description = ''
+        description = lib.mdDoc ''
           Before less opens a file, it first gives your input preprocessor a chance to modify the way the contents of the file are displayed.
         '';
       };
···
       lessclose = mkOption {
         type = types.nullOr types.str;
         default = null;
-        description = ''
+        description = lib.mdDoc ''
           When less closes a file opened in such a way, it will call another program, called the input postprocessor, which may  perform  any  desired  clean-up  action (such  as deleting the replacement file created by LESSOPEN).
         '';
       };

nixos/modules/programs/nano.nix

···
       nanorc = lib.mkOption {
         type = lib.types.lines;
         default = "";
-        description = ''
+        description = lib.mdDoc ''
           The system-wide nano configuration.
-          See <citerefentry><refentrytitle>nanorc</refentrytitle><manvolnum>5</manvolnum></citerefentry>.
+          See {manpage}`nanorc(5)`.
         '';
         example = ''
           set nowrap
···
       syntaxHighlight = lib.mkOption {
         type = lib.types.bool;
         default = true;
-        description = "Whether to enable syntax highlight for various languages.";
+        description = lib.mdDoc "Whether to enable syntax highlight for various languages.";
       };
     };
   };

nixos/modules/programs/proxychains.nix

···
 
       type = mkOption {
         type = types.enum [ "http" "socks4" "socks5" ];
-        description = "Proxy type.";
+        description = lib.mdDoc "Proxy type.";
       };
 
       host = mkOption {
         type = types.str;
-        description = "Proxy host or IP address.";
+        description = lib.mdDoc "Proxy host or IP address.";
       };
 
       port = mkOption {
         type = types.port;
-        description = "Proxy port";
+        description = lib.mdDoc "Proxy port";
       };
     };
   };
···
         type = mkOption {
           type = types.enum [ "dynamic" "strict" "random" ];
           default = "strict";
-          description = ''
-            <literal>dynamic</literal> - Each connection will be done via chained proxies
+          description = lib.mdDoc ''
+            `dynamic` - Each connection will be done via chained proxies
             all proxies chained in the order as they appear in the list
             at least one proxy must be online to play in chain
             (dead proxies are skipped)
-            otherwise <literal>EINTR</literal> is returned to the app.
+            otherwise `EINTR` is returned to the app.
 
-            <literal>strict</literal> - Each connection will be done via chained proxies
+            `strict` - Each connection will be done via chained proxies
             all proxies chained in the order as they appear in the list
             all proxies must be online to play in chain
-            otherwise <literal>EINTR</literal> is returned to the app.
+            otherwise `EINTR` is returned to the app.
 
-            <literal>random</literal> - Each connection will be done via random proxy
-            (or proxy chain, see <option>programs.proxychains.chain.length</option>) from the list.
+            `random` - Each connection will be done via random proxy
+            (or proxy chain, see {option}`programs.proxychains.chain.length`) from the list.
           '';
         };
         length = mkOption {
           type = types.nullOr types.int;
           default = null;
-          description = ''
+          description = lib.mdDoc ''
             Chain length for random chain.
           '';
         };
···
       proxyDNS = mkOption {
         type = types.bool;
         default = true;
-        description = "Proxy DNS requests - no leak for DNS data.";
+        description = lib.mdDoc "Proxy DNS requests - no leak for DNS data.";
       };
 
       quietMode = mkEnableOption "Quiet mode (no output from the library).";
···
       remoteDNSSubnet = mkOption {
         type = types.enum [ 10 127 224 ];
         default = 224;
-        description = ''
+        description = lib.mdDoc ''
           Set the class A subnet number to use for the internal remote DNS mapping, uses the reserved 224.x.x.x range by default.
         '';
       };
···
       tcpReadTimeOut = mkOption {
         type = types.int;
         default = 15000;
-        description = "Connection read time-out in milliseconds.";
+        description = lib.mdDoc "Connection read time-out in milliseconds.";
       };
 
       tcpConnectTimeOut = mkOption {
         type = types.int;
         default = 8000;
-        description = "Connection time-out in milliseconds.";
+        description = lib.mdDoc "Connection time-out in milliseconds.";
       };
 
       localnet = mkOption {
         type = types.str;
         default = "127.0.0.0/255.0.0.0";
-        description = "By default enable localnet for loopback address ranges.";
+        description = lib.mdDoc "By default enable localnet for loopback address ranges.";
       };
 
       proxies = mkOption {
         type = types.attrsOf (types.submodule proxyOptions);
-        description = ''
+        description = lib.mdDoc ''
           Proxies to be used by proxychains.
         '';
 

nixos/modules/programs/spacefm.nix

···
       enable = mkOption {
         type = types.bool;
         default = false;
-        description = ''
-          Whether to install SpaceFM and create <filename>/etc/spacefm/spacefm.conf</filename>.
+        description = lib.mdDoc ''
+          Whether to install SpaceFM and create {file}`/etc/spacefm/spacefm.conf`.
         '';
       };
 
···
             terminal_su = "''${pkgs.sudo}/bin/sudo";
           }
         '';
-        description = ''
+        description = lib.mdDoc ''
           The system-wide spacefm configuration.
-          Parameters to be written to <filename>/etc/spacefm/spacefm.conf</filename>.
-          Refer to the <link xlink:href="https://ignorantguru.github.io/spacefm/spacefm-manual-en.html#programfiles-etc">relevant entry</link> in the SpaceFM manual.
+          Parameters to be written to {file}`/etc/spacefm/spacefm.conf`.
+          Refer to the [relevant entry](https://ignorantguru.github.io/spacefm/spacefm-manual-en.html#programfiles-etc) in the SpaceFM manual.
         '';
       };
 

nixos/modules/programs/starship.nix

···
     settings = mkOption {
       inherit (settingsFormat) type;
       default = { };
-      description = ''
-        Configuration included in <literal>starship.toml</literal>.
+      description = lib.mdDoc ''
+        Configuration included in `starship.toml`.
 
         See https://starship.rs/config/#prompt for documentation.
       '';