Show installed metaphlan db version with the metaphlan --version command

[sagun98]

Hi @Cengoni ,
Here I have open a PR for to show installed metaphlan db version with the metaphlan --version command if available. Please feel free to review/merge the code to master or let me know if anything needs to be changed here.

I will follow up with you in slack as well.

Regards,
Sagun

[sagun98]

Hi @Cengoni ,
As discussed per our conversation, I have update the pull request to support multiple metaphlan DB + non-default metaphlan DB folder with the metaphlan --version command. Please let me know if anything needs to be changed here. I will follow up in slack as well.

[Cengoni]

Hi @sagun98,
Thank you for adding this feature, I slightly modified the criteria for detection of the database for consistency with the latest commit I made on master. Instead of checking the presence of the fasta file - which is now removed after installation - it checks for presence of bowtie2 indexes, which are required together with the pickle file to be present in order to be able to run MetaPhlAn.

Best,
Claudia

[SimHolz]

Hi,

I think this PR breaks the compatibility with Humann 3.9.
At least I get the following error from Humann 3.9 with MetaPhlAn 4.1.2 in the same environment/container.
CRITICAL ERROR: Can not call software version for metaphlan

It runs with no problems using MetaPhlAn 4.1.1

Just wanted to note it somewhere in case someone runs into the same problem.

Best wishes
Simon