Merge folders in decompression

[tommady]

try to
close #466
close #727

I am very open-minded to accepting any suggestions.
The image below is just an example of fulfilling the purpose of those issues.

[marcospb19]

Thanks for this PR! I never before considered this could be an option in the prompt instead of the default, it seems like a good idea so I'm thinking about letting that be.

Can you add a test that unpacks two archives with the following structures:

a/b/c/1

and

a/b/c/2

And show that when decompressed and provided m via stdin, they will merge into:

a/
 b/
  c/
   1
   2

You can start from a copy of multiple_files_with_conflict_and_choice_to_rename that uses the 'allow_piped_choice' feature flag (which we should someday turn into a flag), with that you can pass the stdin choice you want.

[marcospb19]

We have a flag for always overwriting and a flag for always renaming, can you add a flag --merge to always merge? (without asking the prompt).

[tommady]

Could you guide me on which flag represents the always renaming?
because, from my understanding

flag --yes = always override

And yes, I can add a new flag in the decompress command to always merge.

[marcospb19]

Huh I thought the rename PR added a flag for that... maybe it didn't

[tommady]

hmmm, sorry, I read the question.rs deeply found out to add a new flag --merge we need to refactor the function pub fn user_wants_to_overwrite which might be beyond the PR's scope.

So maybe we should create another PR to add

1. --merge
2. --overwrite

WDYT

[marcospb19]

This is also on a good path for merging :) so don't forget a changelog entry, I think the PR title reflects this change well.

[tommady]

Thanks for this PR! I never before considered this could be an option in the prompt instead of the default, it seems like a good idea so I'm thinking about letting that be.

Can you add a test that unpacks two archives with the following structures:

a/b/c/1

and

a/b/c/2

And show that when decompressed and provided m via stdin, they will merge into:

a/
 b/
  c/
   1
   2

You can start from a copy of multiple_files_with_conflict_and_choice_to_rename that uses the 'allow_piped_choice' feature flag (which we should someday turn into a flag), with that you can pass the stdin choice you want.

I am stuck on how to write the test. Thanks for your guidance. very appriceiate!