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622023de8b
The previous method of removing `--change-mode` from the argument list used a
string (`NEW_ARGS`) and `eval set -- $NEW_ARGS` to reconstruct the positional
parameters. This was both unsafe and incorrect.
Because `NEW_ARGS` was built using quoted literal `$arg` strings instead of the
actual values, it resulted in all filtered arguments being set to the same last
value of `$arg`. This caused `getopts` to receive incorrect input and silently
fail to parse options like `-p` and `-f`, leading to broken behavior and unset
variables (e.g., `ESPTOOL_CMD` never got a port).
This patch rewrites the logic to use an array (`NEW_ARGS+=("$arg")`), and
resets positional parameters via `set -- "${NEW_ARGS[@]}"`. This preserves
argument integrity and avoids the unsafe use of `eval`.
Example of the broken behavior before this fix:
./device-update.sh -p /dev/ttyACM0 -f firmware.bin
Resulted in:
set -- firmware.bin firmware.bin firmware.bin firmware.bin
Now:
set -- -p /dev/ttyACM0 -f firmware.bin
as expected.
Signed-off-by: Neil Hanlon <neil@shrug.pw>
