How to detect filename conflicts with uninstalled ports?

[Mykola Dzham]

 Charlie Kester wrote:
> I'm working on a new port that installs a program with a name that seems
> like it would already be taken, but I don't have anything by that name
> on my system -- even though I have lots of ports installed.
> 
> I know that I can use "portsdb -r" to find all the ports that depend on
> a given port, whether they're installed or not.  Is there a similar way
> to determine if an uninstalled port installs a file with a given name?

You can use ports-mgmt/portsearch to search ports, contains some file.
For example 
portsearch -f 'bin/bash$'

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