RFR: 8294549: configure script should detect unsupported path [v2]

[Magnus Ihse Bursie]

On Mon, 7 Nov 2022 00:28:13 GMT, Mike Duigou <mduigou at openjdk.org> wrote:

>> The OpenJDK build system does not support building when the source code resides on a path that contains a space. This requirement is documented in the build instructions but not enforced by the configure script.
>> 
>> This change adds an explicit checks to the wrapper `configure` script that fail the build if the source code to be built is located in a directory who's path contains a space character or the build path cannot be determined.
>> 
>> Includes some idiom modernization and shell scripting best practices changes.
>
> Mike Duigou has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains one commit:
> 
>   8294549: configure script should detect unsupported path
>   
>   The OpenJDK build system does not support building when the source code
>   resides on a path that contains a space. This requirement is documented in the
>   build instructions but not enforced by the configure script.
>   
>   This change adds an explicit checks to the wrapper `configure` script that fail
>   the build if the source code to be built is located in a directory who's path
>   contains a space character or the build path cannot be determined.

Stayin' alive, bot!

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PR: https://git.openjdk.org/jdk/pull/10477