Fix conda builder + add tests

MANIFEST.in

@@ -1,3 +1,4 @@
 include *.md
 include LICENSE
-include setup.cfg
+include setup.cfg
+include repo2docker/files/*

repo2docker/detectors.py

@@ -152,6 +152,7 @@ class BuildPack(LoggingConfigurable):
             "curl",
             "wget",
             "less",
+            "ca-certificates",
             # Include everything from the popular buildpack-deps docker image
             "autoconf",
             "automake",
@@ -550,8 +551,8 @@ class CondaBuildPack(BuildPack):
     path = ['${CONDA_DIR}/bin']
 
     build_script_files = {
-        'conda/install-miniconda.bash': '/tmp/install-miniconda.bash',
-        'conda/environment.yml': '/tmp/environment.yml'
+        os.path.join(os.path.dirname(__file__), 'files', 'conda', 'install-miniconda.bash'): '/tmp/install-miniconda.bash',
+        os.path.join(os.path.dirname(__file__), 'files', 'conda', 'environment.yml'): '/tmp/environment.yml',
     }
 
     build_scripts = [

repo2docker/files/conda/environment.yml

@@ -0,0 +1,9 @@
+dependencies:
+  - python==3.6.1
+  - notebook==5.0.0
+  - ipython==6.0.0
+  - ipykernel==4.6.0
+  - ipywidgets==6.0.0
+  - jupyterlab==0.22.1
+  - pip:
+    - jupyterhub==0.7.2

repo2docker/files/conda/install-miniconda.bash

@@ -0,0 +1,39 @@
+#!/bin/bash
+# This downloads and installs a pinned version of miniconda
+set -ex
+
+cd $(dirname $0)
+CONDA_VERSION=4.3.14
+URL="https://repo.continuum.io/miniconda/Miniconda3-${CONDA_VERSION}-Linux-x86_64.sh"
+INSTALLER_PATH=/tmp/miniconda-installer.sh
+
+wget --quiet $URL -O ${INSTALLER_PATH}
+chmod +x ${INSTALLER_PATH}
+
+# Only MD5 checksums are available for miniconda
+# Can be obtained from https://repo.continuum.io/miniconda/
+MD5SUM="fc6fc37479e3e3fcf3f9ba52cae98991"
+
+if ! echo "${MD5SUM}  ${INSTALLER_PATH}" | md5sum  --quiet -c -; then
+    echo "md5sum mismatch for ${INSTALLER_PATH}, exiting!"
+    exit 1
+fi
+
+bash ${INSTALLER_PATH} -b -p ${CONDA_DIR}
+
+# Allow easy direct installs from conda forge
+${CONDA_DIR}/bin/conda config --system --add channels conda-forge
+
+# Do not attempt to auto update conda or dependencies
+${CONDA_DIR}/bin/conda config --system --set auto_update_conda false
+${CONDA_DIR}/bin/conda config --system --set update_dependencies false
+${CONDA_DIR}/bin/conda config --system --set show_channel_urls true
+
+${CONDA_DIR}/bin/conda env update -n root -f /tmp/environment.yml
+# Clean things out!
+${CONDA_DIR}/bin/conda clean -tipsy
+
+# Remove the big installer so we don't increase docker image size too much
+rm ${INSTALLER_PATH}
+
+chown -R $NB_USER:$NB_USER ${CONDA_DIR}

tests/conda/simple/environment.yml

@@ -0,0 +1,2 @@
+dependencies:
+  - numpy

tests/conda/simple/verify

@@ -0,0 +1,6 @@
+#!/usr/bin/env python
+import sys
+
+assert sys.version_info[:2] == (3, 6)
+
+import numpy