MPM Destination Directory cannot contains "+"

[Sandruz]

Error in fail: MATLAB installation failed: Error: Invalid destination. Destination folder contains invalid characters.

Hi everyone, we are using MPM as part of a Bazel project and have migrated our project to use Bazel Modules.

Because of how Bazel handle the external directories in Module we would need to pass a destination path that looks like the following:

"/home/user/.cache/bazel/_bazel_user/0736c034b3610fe6a1fc9d44c0a6eb94/external/+mpm_ext+mpm"

But MPM seems to not like the "+" character.
Could you please allow the usage of the "+" character for all devs that want to use Bazel and Bazelize Matlab as we are doing? The usage of the "+" is part of the Bazel Module standard at the moment.

[Sandruz]

@mw-wtripp can you provide info about this please?
Is the src code available?

[josmartin]

@Sandruz Folders that start with a "+" symbol have a special meaning in MATLAB as this is how it defines a namespace in the class system . This is why it is precluded in the installation folder name.

That said, we have been experimenting with having the folder that contains MATLAB (i.e. the MATLABROOT) having a folder starting with a "+" symbol and early smoke tests seems to indicate this does not seem to interfere with the working of the class system. We would need to undertake more extensive testing to ensure that this does not break other aspects of MATLAB and MathWorks products.