Upgrade ihaskell_labextension to JupyterLab 2

https://jupyterlab.readthedocs.io/en/stable/developer/extension_migration.html

docker/Dockerfile

@@ -10,7 +10,7 @@
 #     docker build --build-arg BASE_CONTAINER=ubuntu:16.04 -t ihaskell-dev .
 #
 
-ARG BASE_CONTAINER=ubuntu:bionic-20180526@sha256:c8c275751219dadad8fa56b3ac41ca6cb22219ff117ca98fe82b42f24e1ba64e
+ARG BASE_CONTAINER=ubuntu:bionic-20200219@sha256:0925d086715714114c1988f7c947db94064fd385e171a63c07730f1fa014e6f9
 FROM $BASE_CONTAINER
 
 RUN apt-get update && apt-get install -y --no-install-recommends \
@@ -40,20 +40,33 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
 #
 # Required for building ihaskell_labextension
     npm \
-    && \
+#
+# Required for upgrading nodejs
+    curl \
 #
 # Clean apt install
-    rm -rf /var/lib/apt/lists/* \
-    && \
+  && rm -rf /var/lib/apt/lists/* \
 #
 # Install latest npm, which is not in Ubuntu repo
 # Because ihaskell_labextension requires npm >= 4.0
-    npm install npm@latest -g \
-    && \
+  && npm install npm@latest -g \
 #
 # Clean npm install cache
-    npm cache clean --force \
-    && true
+  && npm cache clean --force
+
+# Setup nodejs repository
+# https://github.com/nodesource/distributions/blob/master/README.md#installation-instructions
+# Need nodejs later than 8.16.2 for jupyterlab 2.0.2 → rendermime → marked 0.8.0
+# Otherwise when we build ihaskell_labextension we get errors like this:
+#
+#     ihaskell_labextension $ npm install
+#     npm WARN notsup Unsupported engine for marked@0.8.2: wanted: {"node":">= 8.16.2"} (current: {"node":"8.10.0","npm":"6.14.4"})
+#
+RUN curl -sL https://deb.nodesource.com/setup_13.x | bash - \
+  && apt-get install -y nodejs \
+#
+# Clean apt install
+  && rm -rf /var/lib/apt/lists/*
 
 ENV LANG     C.UTF-8
 ENV LANGUAGE C.UTF-8

ihaskell_labextension/package.json

@@ -1,6 +1,6 @@
 {
   "name": "ihaskell_jupyterlab",
-  "version": "0.0.6",
+  "version": "0.0.7",
   "description": "adds ihaskell syntax highlighting to jupyterlab",
   "keywords": [
     "jupyter",
@@ -30,17 +30,16 @@
     "watch": "tsc -w"
   },
   "dependencies": {
-    "@jupyterlab/application": "0.17.1 - 2.0.0",
-    "@jupyterlab/apputils": "0.17.2 - 2.0.0",
-    "@jupyterlab/docregistry": "0.17.1 - 2.0.0",
-    "@jupyterlab/notebook": "0.17.1 - 2.0.0",
+    "@jupyterlab/application": ">=2.0.0",
+    "@jupyterlab/apputils": ">=2.0.0",
+    "@jupyterlab/docregistry": ">=2.0.0",
+    "@jupyterlab/notebook": ">=2.0.0",
     "@jupyterlab/services": ">=3.0.1",
-    "@phosphor/disposable": "^1.1.2"
+    "@lumino/disposable": "^1.1.2"
   },
   "devDependencies": {
-    "rimraf": "^2.6.1",
-    "typescript": "~2.6.0",
-    "webpack": "~4.12.0"
+    "rimraf": "^3.0.0",
+    "typescript": "~3.7.3"
   },
   "jupyterlab": {
     "extension": true

ihaskell_labextension/src/index.ts

@@ -1,5 +1,5 @@
 import {
-  JupyterLab, JupyterLabPlugin
+  JupyterFrontEnd, JupyterFrontEndPlugin
 } from '@jupyterlab/application';
 
 import './codemirror-ihaskell';
@@ -9,11 +9,11 @@ import '../style/index.css';
 /**
  * Initialization data for the extension1 extension.
  */
-const extension: JupyterLabPlugin<void> = {
+const extension: JupyterFrontEndPlugin<void> = {
   id: 'ihaskell',
   autoStart: true,
   requires: [],
-  activate: (app: JupyterLab) =>
+  activate: (app: JupyterFrontEnd) =>
   {
     app.serviceManager.ready
       .then(() => {defineIHaskell()});