tools/echo and cleanup fix in export scripts

Signed-off-by: Marek Fiala <marek.fiala@espressif.com>

Closes https://github.com/espressif/esp-idf/pull/5816

export.sh

@@ -1,6 +1,6 @@
 # This script should be sourced, not executed.
 
-realpath_int() {
+__realpath() {
     wdir="$PWD"; [ "$PWD" = "/" ] && wdir=""
     arg=$1
     case "$arg" in
@@ -12,7 +12,12 @@ realpath_int() {
 }
 
 
-idf_export_main() {
+__verbose() {
+    [[ -n ${IDF_QUIET} ]] && return
+    echo "$@"
+}
+
+__main() {
     # The file doesn't have executable permissions, so this shouldn't really happen.
     # Doing this in case someone tries to chmod +x it and execute...
 
@@ -82,15 +87,15 @@ idf_export_main() {
     echo "Detecting the Python interpreter"
     . "${IDF_PATH}/tools/detect_python.sh"
 
-    echo "Adding ESP-IDF tools to PATH..."
+    __verbose "Adding ESP-IDF tools to PATH..."
     # Call idf_tools.py to export tool paths
     export IDF_TOOLS_EXPORT_CMD=${IDF_PATH}/export.sh
     export IDF_TOOLS_INSTALL_CMD=${IDF_PATH}/install.sh
     idf_exports=$("$ESP_PYTHON" "${IDF_PATH}/tools/idf_tools.py" export) || return 1
     eval "${idf_exports}"
 
-    echo "Using Python interpreter in $(which python)"
-    echo "Checking if Python packages are up to date..."
+    __verbose "Using Python interpreter in $(which python)"
+    __verbose "Checking if Python packages are up to date..."
     python "${IDF_PATH}/tools/check_python_dependencies.py" || return 1
 
 
@@ -108,17 +113,17 @@ idf_export_main() {
         # shellcheck disable=SC2169,SC2039  # unreachable with 'dash'
         paths="${path_prefix//:/ }"
         if [ -n "${paths}" ]; then
-            echo "Added the following directories to PATH:"
+            __verbose "Added the following directories to PATH:"
         else
-            echo "All paths are already set."
+            __verbose "All paths are already set."
         fi
         for path_entry in ${paths}
         do
-            echo "  ${path_entry}"
+            __verbose "  ${path_entry}"
         done
     else
-        echo "Updated PATH variable:"
-        echo "  ${PATH}"
+        __verbose "Updated PATH variable:"
+        __verbose "  ${PATH}"
     fi
 
     # Clean up
@@ -133,11 +138,11 @@ idf_export_main() {
     # Not unsetting IDF_PYTHON_ENV_PATH, it can be used by IDF build system
     # to check whether we are using a private Python environment
 
-    echo "Done! You can now compile ESP-IDF projects."
-    echo "Go to the project directory and run:"
-    echo ""
-    echo "  idf.py build"
-    echo ""
+    __verbose "Done! You can now compile ESP-IDF projects."
+    __verbose "Go to the project directory and run:"
+    __verbose ""
+    __verbose "  idf.py build"
+    __verbose ""
 }
 
 enable_autocomplete() {
@@ -164,9 +169,10 @@ enable_autocomplete() {
 
 }
 
-idf_export_main
+__main
 enable_autocomplete
 
-unset realpath_int
-unset idf_export_main
+unset __realpath
+unset __main
+unset __verbose
 unset enable_autocomplete