add double-quotes to comply with shellcheck

Author: CaseyFaist

bin/steps/pip-install

@@ -42,7 +42,7 @@ if [ ! "$SKIP_PIP_INSTALL" ]; then
         exit 1
     fi
 
-    $BUILD_DIR/.heroku/python/bin/pip install -r "$BUILD_DIR/requirements.txt" --exists-action=w --src=$BUILD_DIR/.heroku/src --disable-pip-version-check --no-cache-dir 2>&1 | tee "$WARNINGS_LOG" | cleanup | indent
+    "$BUILD_DIR/.heroku/python/bin/pip" install -r "$BUILD_DIR/requirements.txt" --exists-action=w --src="$BUILD_DIR/.heroku/src" --disable-pip-version-check --no-cache-dir 2>&1 | tee "$WARNINGS_LOG" | cleanup | indent
     PIP_STATUS="${PIPESTATUS[0]}"
     set -e
 

bin/steps/pipenv

@@ -58,12 +58,12 @@ if [ ! "$SKIP_PIPENV_INSTALL" ]; then
         # Due to weird old pip behavior and pipenv behavior, pipenv upgrades pip
         # to latest if only --upgrade is specified. Specify upgrade strategy to
         # avoid this eager behavior.
-        $BUILD_DIR/.heroku/python/bin/pip install pipenv==$PIPENV_VERSION --upgrade --upgrade-strategy only-if-needed &> /dev/null
+        "$BUILD_DIR/.heroku/python/bin/pip" install pipenv==$PIPENV_VERSION --upgrade --upgrade-strategy only-if-needed &> /dev/null
 
         # Install the test dependencies, for CI.
         if [ "$INSTALL_TEST" ]; then
             puts-step "Installing test dependencies…"
-            /app/.heroku/python/bin/pipenv install --dev --system --deploy 2>&1 | cleanup | indent
+            "$BUILD_DIR/.heroku/python/bin/pipenv" install --dev --system --deploy 2>&1 | cleanup | indent
 
         # Install the dependencies.
         elif [[ ! -f Pipfile.lock ]]; then

bin/steps/python

@@ -116,8 +116,8 @@ if [ "$FRESH_PYTHON" ] || [[ ! $(pip --version) == *$PIP_UPDATE* ]]; then
   rm -fr "$BUILD_DIR/.heroku/python/lib/python*/site-packages/pip-*"
   rm -fr "$BUILD_DIR/.heroku/python/lib/python*/site-packages/setuptools-*"
 
-  $BUILD_DIR/.heroku/python/bin/python "$ROOT_DIR/get-pip.py" pip=="$PIP_UPDATE" &> /dev/null
-  $BUILD_DIR/.heroku/python/bin/pip install "$ROOT_DIR/vendor/setuptools-39.0.1-py2.py3-none-any.whl" &> /dev/null
+  "$BUILD_DIR/.heroku/python/bin/python" "$ROOT_DIR/get-pip.py" pip=="$PIP_UPDATE" &> /dev/null
+  "$BUILD_DIR/.heroku/python/bin/pip" install "$ROOT_DIR/vendor/setuptools-39.0.1-py2.py3-none-any.whl" &> /dev/null
 fi
 
 set -e