Merge branch 'bugfix/idf_app_assert_print' into 'master'

tiny-test-fw: Print more useful info when download.config doesn't exist

See merge request idf/esp-idf!3112

tools/tiny-test-fw/IDF/IDFApp.py

@@ -32,7 +32,12 @@ def __init__(self, app_path):
  self.idf_path = self.get_sdk_path()
  self.binary_path = self.get_binary_path(app_path)
  assert os.path.exists(self.binary_path)
- assert self.IDF_DOWNLOAD_CONFIG_FILE in os.listdir(self.binary_path)
+ try:
+ assert self.IDF_DOWNLOAD_CONFIG_FILE in os.listdir(self.binary_path)
+ except AssertionError as e:
+ e.args += ("{} doesn't exist. Try to run 'make print_flash_cmd | tail -n 1 > {}/{}' for resolving the issue"
+ "".format(self.IDF_DOWNLOAD_CONFIG_FILE, self.binary_path, self.IDF_DOWNLOAD_CONFIG_FILE),)
+ raise
  self.esptool, self.partition_tool = self.get_tools()
 
  @classmethod