use xtrace on local setups

Author: diegomarquezp

hermetic_build/DEVELOPMENT.md

@@ -217,10 +217,19 @@ python hermetic_build/library_generation/cli/entry_point.py generate \
         --api-definitions-path=/workspace/apis
    ```
 
-# Debug the library generation container
+# Debugging tips
+## Debug the scripts
+Especially on local setups, consider adding the `xtrace` (`set -x`) flag to
+ - `hermetic_build/library_generation/generate_library.sh`
+ - `hermetic_build/library_generation/utils/utilities.sh`
+
+This will allow you to observe how the tools you prepared in `~/.library_generation` are being used.
+
+
+## Debug the library generation container
 If you are working on changing the way the containers are created, you may want
 to inspect the containers to check the setup.
-It would be convenient in such case to have a text editor/viewer available. 
+It would be convenient in such case to have a text editor/viewer available.
 You can achieve this by modifying the Dockerfile as follows:
 
 ```dockerfile

hermetic_build/library_generation/generate_library.sh

@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 
-set -exo pipefail
+set -eo pipefail
 
 # parse input parameters
 while [[ $# -gt 0 ]]; do

hermetic_build/library_generation/utils/utilities.sh

@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 
-set -exo pipefail
+set -eo pipefail
 utilities_script_dir=$(dirname "$(realpath "${BASH_SOURCE[0]}")")
 
 # Utility functions used in `generate_library.sh` and showcase generation.