Add python2 builder as well

- Uses virtualenv instead of venv
- Is ok for Dockerfiles to diverge, we keep assemble scripts the
  same
- Change name to account for venv + python version present
- Add a ugly hack to get some packages (tiffiles and others) to
  work properly when using sdists + py2

singleuser-builder/Dockerfile.py2

@@ -0,0 +1,34 @@
+FROM ubuntu:16.10
+
+MAINTAINER Yuvi Panda <yuvipanda@gmail.com>
+
+LABEL io.openshift.s2i.scripts-url=image:///usr/libexec/s2i
+
+ENV APP_DIR /srv/app
+ENV PATH ${APP_DIR}/venv/bin:$PATH
+
+RUN apt-get update && \
+    apt-get install --yes --no-install-recommends \
+            python \
+            python-dev \
+            build-essential \
+            virtualenv \
+            tar \
+            git && \
+    apt-get purge && apt-get clean
+
+RUN adduser --disabled-password --gecos "Default Jupyter user" jovyan
+
+RUN mkdir -p ${APP_DIR} && chown -R jovyan:jovyan ${APP_DIR}
+
+WORKDIR /home/jovyan
+
+USER jovyan
+RUN virtualenv ${APP_DIR}/venv
+
+RUN ${APP_DIR}/venv/bin/pip install --no-cache-dir notebook==5.0.0 git+https://github.com/yuvipanda/jupyterhub-legacy-singleuser@master ipywidgets==5.2.3 && \
+    ${APP_DIR}/venv/bin/jupyter nbextension enable --py widgetsnbextension
+
+COPY ./s2i/bin/ /usr/libexec/s2i
+
+EXPOSE 8888

singleuser-builder/Makefile

@@ -1,12 +1,7 @@
-
-IMAGE_NAME = jupyterhub/singleuser-builder
+IMAGE_PREFIX = jupyterhub/singleuser-builder-venv-
 VERSION = $(shell cat version)
 
 .PHONY: build
 build:
-	docker build -t $(IMAGE_NAME):$(VERSION) .
-
-.PHONY: test
-test:
-	docker build -t $(IMAGE_NAME)-candidate:$(VERSION) .
-	IMAGE_NAME=$(IMAGE_NAME)-candidate:$(VERSION) test/run
+	docker build -t $(IMAGE_PREFIX)3.5:$(VERSION) . -f Dockerfile
+	docker build -t $(IMAGE_PREFIX)2.7:$(VERSION) . -f Dockerfile.py2

singleuser-builder/s2i/bin/assemble

@@ -23,5 +23,11 @@ cp -Rf /tmp/src/. .
 
 echo "---> Building application from source..."
 if [ -f ${APP_DIR}/src/requirements.txt ]; then
+    # HACK: If numpy is present in requirements.txt, install it first!
+    # This is because some packages (tiffiles *cough*) need numpy to be fully installed
+    # for their setup.py to work, and this... causes all sorts of problems.
+    if grep --quiet numpy ${APP_DIR}/src/requirements.txt; then
+        ${APP_DIR}/venv/bin/pip install $(grep numpy ${APP_DIR}/src/requirements.txt)
+    fi
     ${APP_DIR}/venv/bin/pip install --no-cache-dir -r ${APP_DIR}/src/requirements.txt
 fi

singleuser-builder/version

@@ -1 +1 @@
-v0.1.1
+v0.1.2