profiles/vmapp-demo: init MVE

...moving bits and pieces from .dotfiles

pkgs/desktopAdapters.nix

@@ -0,0 +1,65 @@
+{
+  lib,
+  newScope,
+  makeDesktopItem,
+  writeShellScriptBin,
+}:
+
+lib.makeScope newScope (self: {
+  # Scope-level configuration for adapters
+  useSessionUnits = true; # use --user units, instead of system units
+  vmUnitPrefix = "uvm@";
+  vmSshPrefix = if self.useSessionUnits then "uuvm/" else "uvm/";
+  vmUser = "user";
+  waylandProxyUnit = "wayland-proxy.service"; # could be sommelier
+  oomScoreAdjust = -200;
+
+  # Helper scripts
+  mkRunInVM = vmName: lib.getExe (self.mkRunInVMPkg vmName);
+  mkRunInVMPkg =
+    vmName:
+    writeShellScriptBin "run-in-${vmName}" ''
+      localArgs=(
+      ${lib.optionalString self.useSessionUnits "--user"}
+      --property=Requires=${self.vmUnitPrefix}${vmName}.service
+      --property=After=${self.vmUnitPrefix}${vmName}.service
+      --property=SyslogIdentifier="$1 (${vmName})"
+      )
+      remoteArgs=(
+      systemd-run
+      --user
+      --property=StandardError="journal+console"
+      --property=StandardOutput="journal+console"
+      --property=OOMScoreAdjust=${toString self.oomScoreAdjust}
+      ${lib.optionalString (self.waylandProxyUnit != null) ''
+        --property=Requires=${self.waylandProxyUnit}
+        --property=After=${self.waylandProxyUnit}
+      ''}
+      )
+      systemd-run \
+        "''${localArgs[@]}" \
+        ssh ${self.vmUser}@${self.vmSshPrefix}${vmName} \
+            "''${remoteArgs[@]}" $@
+    '';
+
+  # Actual .desktop item adapters
+  toVM =
+    vmName: attrs:
+    attrs
+    // {
+      exec = "${self.mkRunInVM vmName} ${attrs.exec}";
+    };
+  toBrowser =
+    attrs:
+    attrs
+    // {
+      categories = attrs.categories or [ ] ++ [
+        "WebBrowser"
+        "Network"
+      ];
+      mimeTypes = attrs.mimeTypes or [ ] ++ [
+        "x-scheme-handler/http"
+        "x-scheme-handler/https"
+      ];
+    };
+})