docker-machine's bash autocompletion errors

[jakirkham]

When trying to source the docker-machine autocompletion script in bash on macOS 10.11, it encounters an error. Given that macOS uses a very old version of bash, it is quite possible there is syntax being used here that is simply unsupported instead of just being a bug. Am running Docker for Mac 17.06.0-ce-mac18 (18433) on macOS 10.11. More details below.

$ bash -version
GNU bash, version 3.2.57(1)-release (x86_64-apple-darwin15)
Copyright (C) 2007 Free Software Foundation, Inc.
$ source /Applications/Docker.app/Contents/Resources/etc/docker-machine.bash-completion
-bash: /Applications/Docker.app/Contents/Resources/etc/docker-machine.bash-completion: line 86: syntax error in conditional expression: unexpected token `('
-bash: /Applications/Docker.app/Contents/Resources/etc/docker-machine.bash-completion: line 86: syntax error near `@($'
-bash: /Applications/Docker.app/Contents/Resources/etc/docker-machine.bash-completion: line 86: `    [[ ${words[$glob_pos]} == @($glob) ]] && echo "$key"'

[jakirkham]

Seems this is the same as issue ( docker-archive-public/docker.machine#4126 ). Appears PR ( docker-archive-public/docker.machine#4141 ) should fix this.

[romanrev]

experiencing the same issue here, had to comment the

[[ ${words[$glob_pos]} == @($glob) ]] && echo "$key"

out.
On a personal note I would advise against using bashisms in shell scripts wherever possible. Or test for their applicability before using them at least.
Mac OS 10.12.5, Docker Version 17.06.0-ce-mac19 (18663) and

$ bash --version
GNU bash, version 3.2.57(1)-release (x86_64-apple-darwin16)
Copyright (C) 2007 Free Software Foundation, Inc.

[jakirkham]

This appears to be solved now.

[jakirkham]

Reopening as am seeing this in the Docker Edge ( 18.03.0-ce-rc1-mac54 (23022) ). Line number is now 73, but is otherwise the exact same problem.

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