Handle inappropriate null
output from arduino-cli core list
when no platforms are installed
#311
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A regression was introduced in the 1.0.0 release of Arduino CLI (arduino/arduino-cli#2690). When no platforms are installed,
arduino-cli core list --format json
now returnsnull
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 (#310):
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.Fixes #310