docker-cli: add module (#7411)

(cherry picked from commit 729c5e5465)
Signed-off-by: Austin Horstman <khaneliman12@gmail.com>

modules/programs/docker-cli.nix

@@ -0,0 +1,65 @@
+{
+  lib,
+  pkgs,
+  config,
+  ...
+}:
+let
+  inherit (lib)
+    mkIf
+    mkEnableOption
+    mkOption
+    ;
+
+  cfg = config.programs.docker-cli;
+
+  jsonFormat = pkgs.formats.json { };
+in
+{
+  meta.maintainers = [ lib.maintainers.friedrichaltheide ];
+
+  options.programs.docker-cli = {
+    enable = mkEnableOption "management of docker client config";
+
+    configPath = mkOption {
+      type = lib.types.str;
+      default = ".docker/config.json";
+      description = ''
+        Relative path to the user's home directory where the Docker CLI settings should be stored.
+      '';
+    };
+
+    settings = mkOption {
+      type = jsonFormat.type;
+      default = { };
+      example = ''
+        {
+          "proxies" = {
+            "default" = {
+              "httpProxy" = "http://proxy.example.org:3128";
+              "httpsProxy" = "http://proxy.example.org:3128";
+              "noProxy" = "localhost";
+            };
+          };
+      '';
+      description = ''
+        Available configuration options for the Docker CLI see:
+        <https://docs.docker.com/reference/cli/docker/#docker-cli-configuration-file-configjson-properties
+      '';
+    };
+  };
+
+  config = mkIf cfg.enable {
+    home = {
+      sessionVariables = {
+        DOCKER_CONFIG = "${config.home.homeDirectory}/${cfg.configPath}";
+      };
+
+      file = {
+        "${cfg.configPath}" = {
+          source = jsonFormat.generate "config.json" cfg.settings;
+        };
+      };
+    };
+  };
+}