Nixify project task launcher

Task scripts and desktop shortcuts are now autogenerated using a
friendly list of tasks in `gui/tasker.nix`.

i.e. a separate rofi launcher is unnecessary as the generated desktop
files are automatically picked up by stock rofi.

This is nice.

5 files changed, 52 insertions, 24 deletions

diff --git a/gui/conf/xmonad.hs b/gui/conf/xmonad.hs
index f1222a7..668d818 100644
--- a/gui/conf/xmonad.hs
+++ b/gui/conf/xmonad.hs
@@ -145,7 +145,6 @@ commonKeybindings host =
   , ("C-M1-l"           , spawn "i3lock -c 000000")
 -- application launchers
   , ("M-<Space>"     , spawn "rofi -show combi")
-  , ("C-<Space>"     , spawn "tasker")
   , ("M-<Return>"    , spawn "kitty")
   , ("M-S-<Return>"  , spawn "nvim-qt --no-ext-tabline")
   , ("<Print>"       , spawn "flameshot gui")
diff --git a/gui/default.nix b/gui/default.nix
index 2cc011e..6948139 100644
--- a/gui/default.nix
+++ b/gui/default.nix
@@ -9,6 +9,8 @@ in {
     ./kitty.nix
     ./vim.nix
     ./zathura.nix
+  # desktop shortcuts for project specific tasks
+    ./tasker.nix
   # applications grouped by purpose
     ./apps/file.nix
     ./apps/web.nix
diff --git a/gui/pkgs/tasker.nix b/gui/pkgs/tasker.nix
index a198cb8..2382be2 100644
--- a/gui/pkgs/tasker.nix
+++ b/gui/pkgs/tasker.nix
@@ -1,19 +1,30 @@
-{ stdenv, pkgs, ... }:
+{ pkgs, tasks, ... }:
 
-pkgs.writeTextFile {
-  name        = "tasker";
-  executable  = true;
-  destination = "/bin/tasker";
-
-  text = with pkgs; ''
-    #!${fish}/bin/fish
-
-    pushd ~/.local/share/tasks
-    set task (find . -executable -type f | cut -c3- | rofi -dmenu -p "task")
-
-    if test $status -eq 0
-        eval $task
-    end
-    popd
-  '';
-}
+pkgs.lib.mapAttrsToList (name: value: let
+  command = pkgs.writeTextFile {
+    name        = "tasker_cmd_" + name;
+    executable  = true;
+    destination = "/bin/tasker_cmd_" + name;
+    text = ''
+      #!/bin/sh
+      pushd ${toString value.directory}
+        exec ${toString value.command}
+      popd
+    '';
+  };
+  shortcut = pkgs.writeTextFile {
+    name        = "tasker_shortcut_" + name;
+    executable  = false;
+    destination = "/share/applications/tasker_shortcut_" + name + ".desktop";
+    text = ''
+      [Desktop Entry]
+      Type=Application
+      Name=${toString value.description}
+      Exec=${command}/bin/tasker_cmd_${toString name}
+      Terminal=false
+    '';
+  };
+in pkgs.symlinkJoin {
+  name = "tasker_task_" + name;
+  paths = [ shortcut ];
+}) tasks
diff --git a/gui/tasker.nix b/gui/tasker.nix
new file mode 100644
index 0000000..bb006fa
--- /dev/null
+++ b/gui/tasker.nix
@@ -0,0 +1,20 @@
+{ pkgs, ... }:
+
+let
+  tasks = {
+    "bsc_edit" = {
+      description = "Grid refinement BSc thesis editor";
+      directory = "~/university/documents/bachelor/arbeit";
+      command = "nix-shell --run 'nvim-qt --no-ext-tabline'";
+    };
+    "bsc_view" = {
+      description = "Grid refinement BSc thesis PDF";
+      directory = "~/university/documents/bachelor/arbeit";
+      command = "evince build/main.pdf";
+    };
+  };
+in {
+  home.packages = let
+    task_derivations = pkgs.callPackage ./pkgs/tasker.nix { inherit pkgs; inherit tasks; };
+  in task_derivations;
+}
diff --git a/gui/xmonad.nix b/gui/xmonad.nix
index f265278..52de48d 100644
--- a/gui/xmonad.nix
+++ b/gui/xmonad.nix
@@ -26,13 +26,9 @@ in {
     };
   };
 
-  home.packages = let
-    tasker = pkgs.lib.callPackageWith pkgs ./pkgs/tasker.nix { };
-  in with pkgs; [
+  home.packages = with pkgs; [
   # lockscreen
     i3lock
-  # task launcher
-    tasker
   ];
 
   services.screen-locker = {