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#!/usr/bin/env bash
# The Cloud Foundry Python Buildpack. This script accepts parameters for a build
# directory, a cache directory, and a directory for app environment variables.
#     $ bin/finalize <build-dir> <cache-dir> <deps_dir> <deps_index>
# Fail fast and fail hard.
set -euo pipefail
export BUILDPACK_PATH=$(dirname $(readlink -f ${BASH_SOURCE%/*}))
export BIN_DIR=$BUILDPACK_PATH/bin
export BUILD_DIR=$1
export CACHE_DIR=$2
export DEPS_DIR=$3
export DEPS_IDX=$4
env_vars=$($BUILDPACK_PATH/compile-extensions/bin/build_path_from_supply $DEPS_DIR)
for env_var in $env_vars; do
  export $env_var
$BUILDPACK_PATH/compile-extensions/bin/write_profiled_from_supply $DEPS_DIR $BUILD_DIR
# Syntax sugar.
source $BIN_DIR/utils
# Use miniconda if environment.yml exists and exit
if [ -f $BUILD_DIR/environment.yml ]; then
  $BIN_DIR/steps/conda-finalize
  # Experimental post_compile hook.
  pushd $BUILD_DIR >/dev/null
    source $BIN_DIR/steps/hooks/post_compile
  popd >/dev/null
  $BUILDPACK_PATH/compile-extensions/bin/write_profiled_from_supply $DEPS_DIR $BUILD_DIR
  $BUILDPACK_PATH/compile-extensions/bin/store_buildpack_metadata $BUILDPACK_PATH $CACHE_DIR
# Switch to the repo's context.
cd $BUILD_DIR
source $BIN_DIR/steps/mercurial
# Uninstall removed dependencies with Pip.
source $BIN_DIR/steps/pip-uninstall
# Install dependencies with Pip (where the magic happens).
source $BIN_DIR/steps/pip-install
# Make sure all Pip installed dependencies use #!/usr/bin/env python
$BIN_DIR/steps/rewrite-shebang
# Support for NLTK corpora.
$BIN_DIR/steps/nltk
# Django collectstatic support.
$BIN_DIR/steps/collectstatic
# Experimental post_compile hook.
source $BIN_DIR/steps/hooks/post_compile
# rewrite build dir in egg links to runtime $DEPS_DIR/app so things can be found
cat << EOF > $DEPS_DIR/$DEPS_IDX/profile.d/python.fix-eggs.sh
find \$DEPS_DIR/$DEPS_IDX/python/lib/python*/site-packages/  -name "*.pth" -print0 2> /dev/null | xargs -r -0 -n 1 sed -i -e "s#$DEPS_DIR/$DEPS_IDX#\$DEPS_DIR/$DEPS_IDX#" &> /dev/null
find \$DEPS_DIR/$DEPS_IDX/python/lib-python/*/site-packages/  -name "*.pth" -print0 2> /dev/null | xargs -r -0 -n 1 sed -i -e "s#$DEPS_DIR/$DEPS_IDX#\$DEPS_DIR/$DEPS_IDX#" &> /dev/null
# cache everything
cp -Rl $DEPS_DIR/$DEPS_IDX/python $CACHE_DIR/
if [[ -d $DEPS_DIR/$DEPS_IDX/src ]]; then
  cp -Rl $DEPS_DIR/$DEPS_IDX/src $CACHE_DIR/ &> /dev/null || true
$BUILDPACK_PATH/compile-extensions/bin/write_profiled_from_supply $DEPS_DIR $BUILD_DIR
$BUILDPACK_PATH/compile-extensions/bin/store_buildpack_metadata $BUILDPACK_PATH $CACHE_DIR

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