source $BIN_DIR/utils

PYTHON_VERSION=''

if [ -f runtime.txt ]; then

PYTHON_VERSION=$(cat runtime.txt)

fi

PYTHON_VERSION=$($BUILDPACK_PATH/bin/steps/libs/version.rb $BUILDPACK_PATH/manifest.yml $PYTHON_VERSION)

PYTHON_DIR=$DEPS_DIR/$DEPS_IDX/python

# Install Python.

if [ -f $CACHE_DIR/python-stack ]; then

if [ ! $(cat $CACHE_DIR/python-stack) = $CF_STACK ]; then

rm -fr $PYTHON_DIR $CACHE_DIR/python-version $CACHE_DIR/python-stack $CACHE_DIR/vendor

unset SKIP_INSTALL

fi

fi

if [ -f $CACHE_DIR/python-version ]; then

if [ ! $(cat $CACHE_DIR/python-version) = $PYTHON_VERSION ]; then

puts-step "Found $(cat $CACHE_DIR/python-version), removing"

rm -fr $PYTHON_DIR $CACHE_DIR/python-version $CACHE_DIR/python-stack $CACHE_DIR/vendor

else

SKIP_INSTALL=1

fi

fi

if [ -z "${SKIP_INSTALL:-}" ]; then

puts-step "Installing $PYTHON_VERSION"

# Prepare destination directory.

mkdir $PYTHON_DIR

exit_code=0

SHORT_PYTHON_VERSION=$(echo $PYTHON_VERSION | sed "s|python-||")

filtered_url=$($BUILDPACK_PATH/compile-extensions/bin/download_dependency_by_name python $SHORT_PYTHON_VERSION /tmp/python.tar.gz) || exit_code=$?

if [ $exit_code -ne 0 ]; then

$BUILDPACK_PATH/compile-extensions/bin/recommend_dependency_by_name python $SHORT_PYTHON_VERSION

exit 1

fi

$BUILDPACK_PATH/compile-extensions/bin/warn_if_newer_patch_by_name python $SHORT_PYTHON_VERSION

tar zxvf /tmp/python.tar.gz -C $PYTHON_DIR &> /dev/null

echo "Downloaded [$filtered_url]"

FRESH_PYTHON=true

fi

# Link

pushd $DEPS_DIR/$DEPS_IDX/bin >/dev/null

ln -s ../python/bin/* .

popd >/dev/null

pushd $DEPS_DIR/$DEPS_IDX/lib >/dev/null

ln -s ../python/lib/* .

popd >/dev/null

# Record for future reference.

echo $PYTHON_VERSION > "$CACHE_DIR/python-version"

echo $CF_STACK > "$CACHE_DIR/python-stack"

hash -r

PIP_VERSION=$($BUILDPACK_PATH/compile-extensions/bin/default_version_for $BUILDPACK_PATH/manifest.yml pip)

SETUPTOOLS_VERSION=$($BUILDPACK_PATH/compile-extensions/bin/default_version_for $BUILDPACK_PATH/manifest.yml setuptools)

# If Pip isn't up to date:

if [ -n "${FRESH_PYTHON:-}" ] || [[ ! $(pip --version) == *$PIP_VERSION* ]]; then

TMPTARDIR=$(mktemp -d)

# Prepare it for the real world

puts-step "Installing Setuptools ($SETUPTOOLS_VERSION)"

filtered_url=$($BUILDPACK_PATH/compile-extensions/bin/download_dependency_by_name setuptools $SETUPTOOLS_VERSION /tmp/setuptools.tgz)

echo "Downloaded [$filtered_url]"

tar zxf /tmp/setuptools.tgz -C $TMPTARDIR

pushd $TMPTARDIR/setuptools-$SETUPTOOLS_VERSION/ >/dev/null

python setup.py install --prefix=$DEPS_DIR/$DEPS_IDX/python &> /dev/null

popd >/dev/null

puts-step "Installing Pip ($PIP_VERSION)"

filtered_url=$($BUILDPACK_PATH/compile-extensions/bin/download_dependency_by_name pip $PIP_VERSION /tmp/pip.tgz)

echo "Downloaded [$filtered_url]"

tar zxf /tmp/pip.tgz -C $TMPTARDIR

pushd $TMPTARDIR/pip-$PIP_VERSION/ >/dev/null

python setup.py install --prefix=$DEPS_DIR/$DEPS_IDX/python &> /dev/null

popd >/dev/null

pushd $DEPS_DIR/$DEPS_IDX/bin >/dev/null

ln -sf ../python/bin/* .

popd >/dev/null

pushd $DEPS_DIR/$DEPS_IDX/lib >/dev/null

ln -sf ../python/lib/* .

popd >/dev/null

fi

pushd $DEPS_DIR/$DEPS_IDX/include >/dev/null

ln -sf ../python/include/* .

popd >/dev/null

pushd $DEPS_DIR/$DEPS_IDX/pkgconfig >/dev/null

ln -sf ../python/lib/pkgconfig/* .

popd >/dev/null

hash -r