a binder that can launch different versions of jupyterlab dev builds

.binder/environment.yml

@@ -0,0 +1,41 @@
+# this defines the base environment to BUILD a11y testing binders
+# across different development versions.
+name: a11y
+
+channels:
+  - conda-forge
+  - nodefaults
+
+dependencies:
+  # baseline runtimes
+  - nodejs >=12,<15,!=13.*
+  - python >=3.7,<3.10
+  - yarn <2
+  # jupyterlab itself (though it will be likely removed)
+  - jupyter_server
+  - jupyterlab >=3.0.9
+  - jupyterlab_server >=2.3,<2.4
+  - nbclassic
+  # jupyterlab build
+  - jupyter-packaging
+  - pip
+  - twine
+  - wheel
+  # jupyterlab demo
+  - matplotlib-base
+  - numpy
+  - vega_datasets
+  - xeus-python
+  # jupyterlab docs
+  - recommonmark
+  - sphinx
+  - sphinx_rtd_theme
+  - sphinx-copybutton
+  - sphinx-sitemap
+  # this repo's tools
+  - black
+  - doit
+  - flake8
+  - git
+  - pyyaml
+  - toml

.binder/postBuild

@@ -0,0 +1,20 @@
+#!/usr/bin/env bash
+set -eux
+
+doit list --all --status
+
+mkdir -p logs
+
+time doit clone |& tee logs/00.clone.log
+
+doit list --all --status
+
+time doit setup |& tee logs/01.setup.log
+
+time doit link  |& tee logs/02.link.log
+
+time doit docs  |& tee logs/03.docs.log
+
+time doit app   |& tee logs/99.app.log
+
+doit list --all --status

.gitignore

@@ -102,3 +102,16 @@ venv.bak/
 
 # mypy
 .mypy_cache/
+
+# doit
+.doit*
+
+# yarn
+.yarn-links/
+node_modules/
+
+# repos
+repos/
+
+# logs
+logs/