local: -n: invalid option on MacOS bash about confluent-cli HOT 8 CLOSED

Thanks @hjespers.

Currently the CLI requires bash version >= 4.3. This should be added to a Requirements section. Also it could be re-evaluated whether it makes sense for the supported version to be lowered without significant re-implementation effort.

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I will try "brew install bash" and see if it all works with a more up to date version of bash. MacOS is way behind apparently because Apple can't distribute bash 4.x due to GPL license restrictions.

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Any way this can be caught by the cli itself and reported to the user?
Even if it's added to the Requirements doc, no way 99% of users are going to read that, they'll just hit the error and chuck the cli in the trash ...

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"brew install bash" on MacOS Sierra 10.12.6 get me a bash version that works!

[~] $ confluent status
connect is [UP]
kafka-rest is [UP]
schema-registry is [UP]
kafka is [UP]
zookeeper is [UP]

[~] $ bash --version
GNU bash, version 4.4.12(1)-release (x86_64-apple-darwin16.3.0)
Copyright (C) 2016 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later http://gnu.org/licenses/gpl.html

This is free software; you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

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Good to hear @hjespers!
However, since the dependencies on the more recent bash versions were just a couple, I issued PR: #17 to extend support to bash >= 3.2.

@rmoff the above PR contains also a requirements validation.

Feel free to review the changes if you wish.

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Still an issue for MacOS which is stuck at bash version 3.x. We should document that Mac users will have to "brew install bash" to get a version that meets our minimum requirements

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@hjespers My Mac comes with bash 3.2.57, which should be covered by bash >= 3.2. What version are you seeing that's still a problem after #17? If there's a common enough platform that isn't supported it'd potentially be a blocker for 3.3

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My comment was made when the cli required bash >= 4.3. It's not an issue now that @kkonstantine made it work with bash >=3.2

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