conflict between couchdb and ejabberd

[dtrodrigues]

Please note we will close your issue without comment if you delete, do not read or do not fill out the issue checklist below and provide ALL the requested information. If you repeatedly fail to use the issue template, we will block you from ever submitting issues to Homebrew again.

• ran brew update and can still reproduce the problem?
• ran brew doctor, fixed all issues and can still reproduce the problem?
• ran brew gist-logs <formula> (where <formula> is the name of the formula that failed) and included the output link?
• if brew gist-logs didn't work: ran brew config and brew doctor and included their output with your issue?

What you were trying to do (and why)

Update the version of wxmac in #54881 and the CI running brew test-bot --only-formulae revealed a conflict between couchdb and ejabberd -- https://github.com/Homebrew/homebrew-core/pull/54881/checks?check_run_id=683436843#step:6:44

What happened (include command output)

This can be replicated by trying to install couchdb and ejabberd manually:

Command output

$ brew install couchdb ejabberd
==> Downloading https://homebrew.bintray.com/bottles/couchdb-3.1.0.catalina.bottle.tar.gz
Already downloaded: /Users/username/Library/Caches/Homebrew/downloads/35f8944116423b657bc269481b0a14e544278cdf2320253e5448033c0fabeb20--couchdb-3.1.0.catalina.bottle.tar.gz
==> Pouring couchdb-3.1.0.catalina.bottle.tar.gz
==> Caveats
If your upgrade from version 1.7.2_1 then your old database path is "/usr/local/var/lib/couchdb".
The database path of this installation: /usr/local/var/couchdb/data".
If you want to migrate your data from 1.x to 2.x then follow this guide:

https://docs.couchdb.org/en/stable/install/upgrading.html
To have launchd start couchdb now and restart at login:

brew services start couchdb

Or, if you don't want/need a background service you can just run:

couchdb

==> Summary

🍺  /usr/local/Cellar/couchdb/3.1.0: 1,580 files, 46.7MB

==> Downloading https://homebrew.bintray.com/bottles/ejabberd-20.04.catalina.bottle.tar.gz

Already downloaded: /Users/username/Library/Caches/Homebrew/downloads/6890a8629a63900e04fea83279091a094b5daffb691d74d2735b3ea1e862181e--ejabberd-20.04.catalina.bottle.tar.gz

==> Pouring ejabberd-20.04.catalina.bottle.tar.gz

Error: The brew link step did not complete successfully

The formula built, but is not symlinked into /usr/local

Could not symlink lib/jiffy-1.0.4/ebin/jiffy.app

Target /usr/local/lib/jiffy-1.0.4/ebin/jiffy.app

is a symlink belonging to couchdb. You can unlink it:

brew unlink couchdb
To force the link and overwrite all conflicting files:

brew link --overwrite ejabberd
To list all files that would be deleted:

brew link --overwrite --dry-run ejabberd
Possible conflicting files are:

/usr/local/lib/jiffy-1.0.4/ebin/jiffy.app -> /usr/local/Cellar/couchdb/3.1.0/lib/jiffy-1.0.4/ebin/jiffy.app

/usr/local/lib/jiffy-1.0.4/ebin/jiffy.beam -> /usr/local/Cellar/couchdb/3.1.0/lib/jiffy-1.0.4/ebin/jiffy.beam

/usr/local/lib/jiffy-1.0.4/ebin/jiffy_utf8.beam -> /usr/local/Cellar/couchdb/3.1.0/lib/jiffy-1.0.4/ebin/jiffy_utf8.beam

/usr/local/lib/jiffy-1.0.4/priv/jiffy.so -> /usr/local/Cellar/couchdb/3.1.0/lib/jiffy-1.0.4/priv/jiffy.so

==> Caveats

If you face nodedown problems, concat your machine name to:

/private/etc/hosts

after 'localhost'.
To have launchd start ejabberd now and restart at login:

brew services start ejabberd

Or, if you don't want/need a background service you can just run:

/usr/local/sbin/ejabberdctl start

==> Summary

🍺  /usr/local/Cellar/ejabberd/20.04: 801 files, 14.6MB

==> Caveats

==> couchdb

If your upgrade from version 1.7.2_1 then your old database path is "/usr/local/var/lib/couchdb".
The database path of this installation: /usr/local/var/couchdb/data".
If you want to migrate your data from 1.x to 2.x then follow this guide:

https://docs.couchdb.org/en/stable/install/upgrading.html
To have launchd start couchdb now and restart at login:

brew services start couchdb

Or, if you don't want/need a background service you can just run:

couchdb

==> ejabberd

If you face nodedown problems, concat your machine name to:

/private/etc/hosts

after 'localhost'.
To have launchd start ejabberd now and restart at login:

brew services start ejabberd

Or, if you don't want/need a background service you can just run:

/usr/local/sbin/ejabberdctl start
  
  

What you expected to happen

I'm not sure what the appropriate solution is - it looks like the offending Erlang 'jiffy' library installed by both is version 1.0.4, so they probably can both use it successfully. However, since the brew link failure is considered an error, CI fails.

Step-by-step reproduction instructions (by running brew install commands)

brew install couchdb ejabberd

[SMillerDev]

Could you make a pull request to mark both as conflicting?

[bayandin]

This was fixed in #54665