Do not issue warning if thirdparty dir is missing

Signed-off-by: Philippe Ombredanne <pombredanne@nexb.com>

Author: pombredanne

configure

@@ -51,7 +51,10 @@ CFG_ROOT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
 CFG_BIN_DIR=$CFG_ROOT_DIR/$VIRTUALENV_DIR/bin
 
 # Find packages from the local thirdparty directory or from thirdparty.aboutcode.org
-PIP_EXTRA_ARGS="--find-links $CFG_ROOT_DIR/thirdparty --find-links https://thirdparty.aboutcode.org/pypi"
+if [ -f "$CFG_ROOT_DIR/thirdparty" ]; then
+    PIP_EXTRA_ARGS="--find-links $CFG_ROOT_DIR/thirdparty "
+fi
+PIP_EXTRA_ARGS="$PIP_EXTRA_ARGS --find-links https://thirdparty.aboutcode.org/pypi"
 
 
 ################################

configure.bat

@@ -49,7 +49,11 @@ set "CFG_BIN_DIR=%CFG_ROOT_DIR%\%VIRTUALENV_DIR%\Scripts"
 
 @rem ################################
 @rem # Thirdparty package locations and index handling
-set "PIP_EXTRA_ARGS=--find-links %CFG_ROOT_DIR%\thirdparty --find-links https://thirdparty.aboutcode.org/pypi" & %INDEX_ARG%
+if exist ""%CFG_ROOT_DIR%\thirdparty"" (
+    set "PIP_EXTRA_ARGS=--find-links %CFG_ROOT_DIR%\thirdparty "
+)
+
+set "PIP_EXTRA_ARGS=%PIP_EXTRA_ARGS% --find-links https://thirdparty.aboutcode.org/pypi" & %INDEX_ARG%
 @rem ################################