mas: add module for Mac App Store management

Signed-off-by: Angel J <78835633+Iamanaws@users.noreply.github.com>

tests/programs-mas.nix

@@ -0,0 +1,71 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+
+let
+  mas =
+    pkgs.runCommand "mas-0.0.0" { } ''
+          mkdir -p $out/bin
+          cat > $out/bin/mas <<'EOF'
+      #!/usr/bin/env bash
+      exit 0
+      EOF
+          chmod +x $out/bin/mas
+    ''
+    // {
+      meta.mainProgram = "mas";
+    };
+in
+{
+  system.primaryUser = "primary-mas-user";
+
+  programs.mas = {
+    enable = true;
+    user = "test-mas-user";
+    package = mas;
+    update = true;
+    cleanup = true;
+    packages = {
+      "1Password for Safari" = 1569813296;
+      Xcode = 497799835;
+    };
+  };
+
+  homebrew.masApps = {
+    "KeepFromHomebrew" = 424242;
+  };
+
+  test = ''
+    echo "checking mas present in systemPackages" >&2
+    test -x ${config.out}/sw/bin/mas
+
+    echo "checking mas activation script uses requested user" >&2
+    grep -- '--user=test-mas-user' ${config.out}/activate
+
+    echo "checking mas desired ids are present" >&2
+    grep 'desiredIds=(' ${config.out}/activate
+    grep '1569813296' ${config.out}/activate
+    grep '497799835' ${config.out}/activate
+
+    echo "checking mas install loop exists" >&2
+    grep 'mas install \"$appId\"' ${config.out}/activate
+
+    echo "checking mas update is triggered" >&2
+    grep 'mas update' ${config.out}/activate
+
+    echo "checking mas parses installedApps from mas list" >&2
+    grep 'declare -A installedApps' ${config.out}/activate
+    grep 'installedApps\[' ${config.out}/activate
+
+    echo "checking mas cleanup log and uninstall" >&2
+    grep 'removing .* from App Store' ${config.out}/activate
+    grep 'runAsUser .*/mas uninstall' ${config.out}/activate
+
+    echo "checking homebrew.masApps ids are kept during cleanup" >&2
+    grep 'homebrewIds=(' ${config.out}/activate
+    grep '424242' ${config.out}/activate
+  '';
+}