Try to upgrade Heroku buildpack for Plone 5

Procfile

@@ -0,0 +1 @@
+work: python configure_zopeconf.py; bin/instance run test.py

app.json

@@ -1,14 +1,10 @@
 {
   "name": "Plone Mosaic on Heroku",
-  "description": "A Plone Mosaic preview site hosted on Heroku. Login with admin:secret.",
+  "description": "A Plone Mosaic technology preview on Heroku. Login with admin:admin.",
   "repository": "https://github.com/plone/plone.app.mosaic",
   "logo": "http://www.coactivate.org/projects/plone-marketing/plone-logo-guidelines/plone-vertical-logo.png",
   "keywords": ["plone", "python", "cms"],
   "website": "http://plone.org",
-  "env": {
-    "BUILDPACK_URL": "https://github.com/niteoweb/heroku-buildpack-plone",
-    "BUILDOUT_CFG": "heroku.cfg"
-  },
   "addons": [
     "heroku-postgresql:hobby-dev",
     "mailgun"

bin/compile

@@ -0,0 +1,102 @@
+#!/usr/bin/env bash
+
+set -eo pipefail
+
+# Heroku has opinions on indentation, let's respect them
+indent() {
+  sed -u 's/^/       /'
+}
+
+BUILD_DIR=$1  # -> temp dir that contains whatever is in the git repo
+CACHE_DIR=$2  # -> use this dir for caching between compiles
+ENV_DIR=$3  # -> environment variables are stored as files inside here
+INSTALL_DIR="$BUILD_DIR/.heroku/vendor/buildout"  # -> after buildout is
+# finished, copy results to this dir so they get compressed into a Heroku slug
+UI_URL=https://launchpad.net/plone/5.0/5.0a2/+download/Plone-5.0a2-UnifiedInstaller.tgz
+UI_TARBALL=Plone-5.0a2-UnifiedInstaller.tgz
+UI_DIR=Plone-5.0a2-UnifiedInstaller.tgz
+
+
+# make sure dirs exist
+mkdir -p $CACHE_DIR
+mkdir -p $INSTALL_DIR
+
+echo "-----> Use build cache"
+if [ -d $CACHE_DIR/bin ]; then
+    echo "Get buildout results from the previous build" | indent
+    cp -r $CACHE_DIR/bin  $BUILD_DIR/
+    cp -r $CACHE_DIR/eggs  $BUILD_DIR/
+    cp -r $CACHE_DIR/parts  $BUILD_DIR/
+    cp -r $CACHE_DIR/var  $BUILD_DIR/
+else
+    echo "Cache empty, let's fix that" | indent
+    echo "Prime with Unified Installer cache" | indent
+    curl -OL $UI_URL
+    echo "Unpacking Installer" | indent
+    tar xfz $UI_TARBALL
+    cd $UI_DIR
+    echo "Unpacking Installer cache" | indent
+    tar xfj packages/buildout-cache.tar.bz2
+    echo "Moving cache eggs to build directory" | indent
+    cp -r buildout-cache/eggs $BUILD_DIR/
+    echo "Clean up Installer files" | indent
+    cd ..
+    rm -rf $UI_TARBALL $UI_DIR
+
+fi
+
+echo "-----> Read BUILDOUT_CFG from env vars, or use default"
+if [ -f $ENV_DIR/BUILDOUT_CFG ]; then
+    export "BUILDOUT_CFG=$(cat $ENV_DIR/BUILDOUT_CFG)"
+    echo "Found ${BUILDOUT_CFG}" | indent
+else
+    export "BUILDOUT_CFG=heroku.cfg"
+    echo "Using default: heroku.cfg" | indent
+fi
+
+echo "-----> Read BUILDOUT_VERBOSITY from env vars, or use default"
+if [ -f $ENV_DIR/BUILDOUT_VERBOSITY ]; then
+    export "BUILDOUT_VERBOSITY=$(cat $ENV_DIR/BUILDOUT_VERBOSITY)"
+    echo "Use verbosity: ${BUILDOUT_VERBOSITY}" | indent
+else
+    export "BUILDOUT_VERBOSITY="
+    echo "Use default buildout verbosity" | indent
+fi
+
+echo "-----> Read BOOTSTRAP_PY_URL from env vars, or use default"
+if [ -f $ENV_DIR/BOOTSTRAP_PY_URL ]; then
+    export "BOOTSTRAP_PY_URL=$(cat $ENV_DIR/BOOTSTRAP_PY_URL)"
+    echo "Use custom bootstrap.py: ${BOOTSTRAP_PY_URL}" | indent
+else
+    export "BOOTSTRAP_PY_URL=http://downloads.buildout.org/2/bootstrap.py"
+    echo "Use default bootstrap.py: ${BOOTSTRAP_PY_URL}" | indent
+fi
+
+cd $BUILD_DIR
+echo "-----> Bootstrap buildout"
+curl -o bootstrap.py -L "${BOOTSTRAP_PY_URL}"
+python bootstrap.py -c $BUILDOUT_CFG
+echo "-----> Run bin/buildout -c ${BUILDOUT_CFG} ${BUILDOUT_VERBOSITY}"
+bin/buildout -c $BUILDOUT_CFG $BUILDOUT_VERBOSITY
+
+echo "-----> Fix paths in zope.conf"
+sed "s|${BUILD_DIR}|/app|" parts/instance/etc/zope.conf > zope.conf.new
+mv zope.conf.new parts/instance/etc/zope.conf
+
+echo "-----> Copy results to cache"
+cp -r $BUILD_DIR/bin $CACHE_DIR
+cp -r $BUILD_DIR/eggs $CACHE_DIR
+cp -r $BUILD_DIR/parts $CACHE_DIR
+cp -r $BUILD_DIR/var $CACHE_DIR
+
+echo "-----> Copy results to slug"
+cp -r $BUILD_DIR/bin $INSTALL_DIR
+cp -r $BUILD_DIR/eggs $INSTALL_DIR
+cp -r $BUILD_DIR/parts $INSTALL_DIR
+cp -r $BUILD_DIR/var $INSTALL_DIR
+
+echo "-----> Copy configure_zopeconf.py script to slug"
+curl -OL "https://raw.githubusercontent.com/plone/heroku-buildpack-plone/master/configure_zopeconf.py"
+cp -r $BUILD_DIR/configure_zopeconf.py $INSTALL_DIR
+
+echo "Done" | indent

bin/detect

@@ -0,0 +1,7 @@
+#!/usr/bin/env bash
+# bin/detect <build-dir>
+
+BUILD_DIR=$1
+[ -f $BUILD_DIR/heroku.cfg ] || exit 1 # fail fast if no heroku.cfg
+
+echo Plone

bin/release

@@ -0,0 +1,10 @@
+#!/usr/bin/env bash
+# bin/release <build-dir>
+
+cat << EOF
+---
+addons:
+  - heroku-postgresql:dev
+default_process_types:
+  web: python configure_zopeconf.py; bin/instance console
+EOF