smug: init module (#6696)

This adds smug, a session manager and task runner for tmux, as module.

tests/modules/programs/smug/blogdemo.yml

@@ -0,0 +1,33 @@
+before_start:
+- docker-compose -f my-microservices/docker-compose.yml up -d
+env:
+  FOO: bar
+root: ~/Developer/blog
+session: blogdemo
+stop:
+- docker stop $(docker ps -q)
+windows:
+- commands:
+  - docker-compose start
+  layout: main-vertical
+  manual: true
+  name: code
+  panes:
+  - commands:
+    - docker-compose exec php /bin/sh
+    - clear
+    root: .
+    type: horizontal
+  root: blog
+- commands:
+  - docker-compose start
+  layout: tiled
+  name: infrastructure
+  panes:
+  - commands:
+    - docker-compose up -d
+    - docker-compose exec php /bin/sh
+    - clear
+    root: .
+    type: horizontal
+  root: ~/Developer/blog/my-microservices

tests/modules/programs/smug/default.nix

@@ -0,0 +1,4 @@
+{
+  smug-settings = ./settings.nix;
+  smug-empty-settings = ./empty-settings.nix;
+}

tests/modules/programs/smug/empty-settings.nix

@@ -0,0 +1,6 @@
+{
+  programs.smug.enable = true;
+  nmt.script = ''
+    assertPathNotExists home-files/.config/smug
+  '';
+}

tests/modules/programs/smug/settings.nix

@@ -0,0 +1,54 @@
+{
+  programs = {
+    smug = {
+      enable = true;
+
+      projects = {
+
+        blogdemo = {
+          root = "~/Developer/blog";
+          beforeStart = [
+            "docker-compose -f my-microservices/docker-compose.yml up -d" # my-microservices/docker-compose.yml is a relative to `root`-al
+          ];
+          env = { FOO = "bar"; };
+          stop = [ "docker stop $(docker ps -q)" ];
+          windows = [
+            {
+              name = "code";
+              root = "blog";
+              manual = true;
+              layout = "main-vertical";
+              commands = [ "docker-compose start" ];
+              panes = [{
+                type = "horizontal";
+                root = ".";
+                commands = [ "docker-compose exec php /bin/sh" "clear" ];
+              }];
+            }
+
+            {
+              name = "infrastructure";
+              root = "~/Developer/blog/my-microservices";
+              layout = "tiled";
+              commands = [ "docker-compose start" ];
+              panes = [{
+                type = "horizontal";
+                root = ".";
+                commands = [
+                  "docker-compose up -d"
+                  "docker-compose exec php /bin/sh"
+                  "clear"
+                ];
+              }];
+            }
+          ];
+        };
+
+      };
+    };
+  };
+
+  nmt.script = ''
+    assertFileContent home-files/.config/smug/blogdemo.yml ${./blogdemo.yml}
+  '';
+}