From 40804b0af1814c8d5ea1875283464673b7d3a28c Mon Sep 17 00:00:00 2001
From: Adrian Kummerlaender
Date: Fri, 17 Jan 2020 15:36:29 +0100
Subject: Implement Jupyter Lab type in Tasker module

Allows for convenient creation of shortcuts to Jupyter Lab sessions.
As a bonus they are wrapped in Chromium App View instances and
automatically terminated when required.
---
 custom.nix        | 16 +++++++++++++++-
 module/tasker.nix | 19 +++++++++++++++++++
 tasks/default.nix | 25 +++++++++++++++++++++++++
 3 files changed, 59 insertions(+), 1 deletion(-)

diff --git a/custom.nix b/custom.nix
index e489fea..272fc6a 100644
--- a/custom.nix
+++ b/custom.nix
@@ -21,7 +21,7 @@ in {
             default = "~/";
           };
           type = mkOption {
-            type = types.enum [ "launcher" "terminal" "local-shell" "local-editor" "environment" "python-console" ];
+            type = types.enum [ "launcher" "terminal" "local-shell" "local-editor" "environment" "python-console" "jupyter-lab" ];
             default = "launcher";
           };
           command = mkOption {
@@ -34,9 +34,23 @@ in {
       });
     };
 
+    notebooks = mkOption {
+      type = types.attrsOf (types.submodule {
+        options = {
+          description = mkOption {
+            type = types.uniq types.string;
+          };
+          environment = mkOption {
+            type = types.package;
+          };
+        };
+      });
+    };
+
     pkgs = mkOption {
       type = types.attrs;
     };
+
     nixpkgs-unstable = mkOption {
       type = types.attrs;
     };
diff --git a/module/tasker.nix b/module/tasker.nix
index 032027b..0987544 100644
--- a/module/tasker.nix
+++ b/module/tasker.nix
@@ -11,6 +11,23 @@ let
     #!/bin/sh
     exec ${pkgs.kitty}/bin/kitty -d ${dir} ${cmd}
   '';
+  launchJupyterInDirectory = dir: env: ''
+    #!/usr/bin/env nix-shell
+    #!nix-shell ${builtins.unsafeDiscardStringContext env.drvPath} -i fish
+
+    for port in (seq 9000 9100)
+      if not ss --listening --oneline --tcp --no-header | awk '{ split($4, port, ":"); print port[2]+0 }' | grep -q $port
+        set free_port $port
+        break
+      end
+    end
+
+    set token (head /dev/urandom | tr -dc A-Za-z0-9 | head -c 40)
+    jupyter lab --no-browser --port=$free_port --NotebookApp.token=$token &
+    sleep 2
+    ${pkgs.chromium}/bin/chromium --app="http://localhost:$free_port/?token=$token"
+    kill (jobs -lp)
+  '';
 
   taskivations = pkgs.lib.mapAttrsToList (name: conf: let
     command = pkgs.writeTextFile {
@@ -31,6 +48,8 @@ let
         python-console = launchCommandInDirectory "~/" ''
           nix-shell ${builtins.unsafeDiscardStringContext conf.environment.drvPath} --command jupyter-qtconsole
         '';
+
+        jupyter-lab = launchJupyterInDirectory conf.directory conf.environment;
       };
     };
 
diff --git a/tasks/default.nix b/tasks/default.nix
index 3521443..1ccda33 100644
--- a/tasks/default.nix
+++ b/tasks/default.nix
@@ -27,6 +27,15 @@ let
     '';
   };
 
+  jupyter = import (builtins.fetchGit {
+    url = https://github.com/tweag/jupyterWith;
+    rev = "";
+  }) {};
+
+  mkJupyterEnv = kernel: (jupyter.jupyterlabWith {
+    kernels = [ kernel ];
+  }).env;
+
 in {
   custom.tasks = {
     bsc_edit = {
@@ -101,5 +110,21 @@ in {
         sympy.init_session()
       '';
     };
+
+    pymath_jupyter = {
+      description = "Python @ Jupyter Lab";
+      directory = "~/";
+      type = "jupyter-lab";
+      environment = mkJupyterEnv (
+        jupyter.kernels.iPythonWith {
+          name = "python";
+          packages = p: with p; [
+            numpy
+            sympy
+            matplotlib
+          ];
+        }
+      );
+    };
   };
 }
-- 
cgit v1.2.3