Commits on Aug 13, 2024

1. Handle inappropriate null output from arduino-cli core list when … …

   …no platforms are installed
   
   A regression was introduced in the 1.0.0 release of Arduino CLI. When no platforms are installed, `arduino-cli core list
   --format json` now returns `null` instead of the appropriate value of an empty array.
   
   Previously the code for parsing the output was written under the assumption of the logical behavior of the command
   always outputting an array, even if an empty array. This code could not correctly handle the output produced by Arduino
   CLI >=1.0.0, resulting in a spurious failure of the action:
   
   ```
   Traceback (most recent call last):
     File "/home/runner/work/_actions/arduino/compile-sketches/main/compilesketches/compilesketches.py", line 1709, in <module>
       main()  # pragma: no cover
       ^^^^^^
     File "/home/runner/work/_actions/arduino/compile-sketches/main/compilesketches/compilesketches.py", line 63, in main
       compile_sketches.compile_sketches()
     File "/home/runner/work/_actions/arduino/compile-sketches/main/compilesketches/compilesketches.py", line 219, in compile_sketches
       self.install_platforms()
     File "/home/runner/work/_actions/arduino/compile-sketches/main/compilesketches/compilesketches.py", line 337, in install_platforms
       self.install_platforms_from_repository(platform_list=platform_list.repository)
     File "/home/runner/work/_actions/arduino/compile-sketches/main/compilesketches/compilesketches.py", line 629, in install_platforms_from_repository
       destination_path = self.get_platform_installation_path(platform=platform)
                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
     File "/home/runner/work/_actions/arduino/compile-sketches/main/compilesketches/compilesketches.py", line 562, in get_platform_installation_path
       for installed_platform in installed_platform_list:
   TypeError: 'NoneType' object is not iterable
   ```
   
   In order to work around the Arduino CLI bug, code is added to handle the case where the value is `null` (`None` when
   converted to a Python data type) instead of an array.

   

   per1234 committed Aug 13, 2024
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