Fix install script's check for previous installation #1603
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The installation script checks for an existing installation in the PATH in order to provide appropriate advice to the user about adding the installation to their their PATH environment variable. This check is done using `command -v`. It turns out that the exit status is shell dependent in the event the command is not found, so that it might be either 1 or 127 depending on the user's system. The script previously assumed that the exit status would be 1 when the command was not found in PATH, which resulted in spurious advice under these conditions: ``` An existing arduino-cli was found at . Please prepend "/home/foo/arduino-cli/bin" to your $PATH or remove the existing one. ``` It seems safest to fix this by inverting the logic so that the advice about an existing installation in PATH is only printed when one was found.
per1234
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topic: infrastructure
umbynos
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Dec 20, 2021
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UPGRADING.mdhas been updated with a migration guide (for breaking changes)Infrastructure fix.
The installation script checks for an existing installation in the PATH in order to provide appropriate advice to the
user about adding the installation to their their PATH environment variable.
This check is done using
command -v. It turns out that the exit status is shell dependent in the event the command isnot found, so that it might be either 1 or 127 depending on the user's system. The script previously assumed that the
exit status would be 1 when the command was not found in PATH, which resulted in spurious advice under these conditions:
example
Previous installation check's logic is inverted so that the advice about an existing installation in PATH is only printed when one was found, making it only dependent on exit status 0.
titled accordingly?
No breaking change.
See upstream commits for more atomic breakdown of changes: arduino/tooling-project-assets#189
Checks for proper behavior of this aspect have been added for the parent: https://github.com/arduino/tooling-project-assets/actions/runs/1601562939
Originally reported at https://forum.arduino.cc/t/failing-to-instlal-arduino-cli-on-raspberry/936871