rofi: fix files to be opened with xdg-open

hosts/common/programs/rofi/config.rasi

@@ -16,6 +16,7 @@ configuration {
     directory: "/home";
     /* display-name: text to prepend in combi mode */
     display-name: "/";
+    /* `command` is the prefix to prepend (along with a space) *before* passing it off to `run-command` */
     command: "xdg-open";
   }
   drun {
@@ -28,8 +29,8 @@ configuration {
   /* combi-display-format: "{text}"; */
   combi-display-format: "{mode}{text}";
 
-  /* launch applications via xdg-desktop-portal */
-  run-command: "gdbus call --session --timeout 10 --dest org.freedesktop.portal.Desktop --object-path /org/freedesktop/portal/desktop --method org.freedesktop.portal.DynamicLauncher.Launch {app_id}.desktop {}";
+  /* launch applications via my own launcher, which directs them through to xdg-desktop-portal */
+  run-command: "rofi-run-command '{app_id}.desktop' {cmd}";
 
   drun-use-desktop-cache: true;
 }

hosts/common/programs/rofi/default.nix

@@ -50,8 +50,7 @@
     };
 
     suggestedPrograms = [
-      "xdg-utils"
-      "gdbus"
+      "rofi-run-command"
     ];
 
     sandbox.method = "bwrap";
@@ -78,4 +77,18 @@
       ".cache/rofi"
     ];
   };
+
+  sane.programs.rofi-run-command = {
+    packageUnwrapped = pkgs.static-nix-shell.mkBash {
+      pname = "rofi-run-command";
+      srcRoot = ./.;
+      pkgs = [ "glib" "xdg-utils" ];
+    };
+    sandbox.enable = false;  #< trivial script, and all our deps are sandboxed
+
+    suggestedPrograms = [
+      "gdbus"
+      "xdg-utils"
+    ];
+  };
 }

hosts/common/programs/rofi/rofi-run-command

@@ -0,0 +1,27 @@
+#!/usr/bin/env nix-shell
+#!nix-shell -i bash -p glib -p xdg-utils
+
+# use:
+# rofi-run-command <handler>.desktop [cmd [args ...]]
+# if a non-empty desktop file is provided, we'll just launch that.
+# else, if the cmd is `xdg-open`, then we'll treat `args` as a URI and forward that to xdg-open.
+# nothing else is as-yet supported.
+
+desktop="$1"
+shift
+binary="$1"
+shift
+binArgs=("$@")
+
+if [ "$desktop" != .desktop ]; then
+  exec gdbus call --session --timeout 10 \
+    --dest org.freedesktop.portal.Desktop \
+    --object-path /org/freedesktop/portal/desktop \
+    --method org.freedesktop.portal.DynamicLauncher.Launch \
+    "$desktop" {}
+elif [ "$binary" = "xdg-open" ]; then
+  exec xdg-open "$@"
+fi
+
+printf "no .desktop file, and unexpected binary; not invoking: %s %s" "$binary" "${binArgs[*]}" > /dev/null
+exit 1