Current `rack` dependency version causes conflict with modern `rackup` versions

[64kramsystem]

The rack dependency version, ~>2.2, causes conflicts with modern rackup versions (e.g. 2.1.0); it should be verified and upgraded to a modern version (e.g. ~>3.1).

[sj26]

How does it cause conflicts?

[64kramsystem]

Try installing rack version ~>2.2, then the latest rackup version; you'll get a conflict on the rackup binary.

[sj26]

Ah yes, I can reproduce:

$ gem install mailcatcher
...
Successfully installed rack-2.2.9
...

$ gem install rackup
Fetching rack-3.1.7.gem
Fetching rackup-2.1.0.gem
Successfully installed rack-3.1.7
rackup's executable "rackup" conflicts with rack
Overwrite the executable? [yN]
ERROR:  Error installing rackup:
	"rackup" from rackup conflicts with installed executable from rack

Sounds like a bump is in order. It might be possible now, given the dependencies on thin and websocket-driver have been unwound a little.

[aried3r]

Do you think this would potentially solve #560?

[sj26]

No. #560 is an error in how homebrew has packaged mailcatcher.

Workaround for that is don’t install mailcatcher with homebrew. Just:

gem install mailcatcher

[dsandstrom]

No. #560 is an error in how homebrew has packaged mailcatcher.

Workaround for that is don’t install mailcatcher with homebrew. Just:

gem install mailcatcher

Results in

rack's executable "rackup" conflicts with rackup
Overwrite the executable? [yN]
ERROR:  Error installing mailcatcher:
	"rackup" from rack conflicts with installed executable from rackup

I don't want to overwrite the executable so can't install

[sj26]

Just press “n” for now

[dsandstrom]

Just press “n” for now

Right, that results in not installing the gem

[64kramsystem]

No. #560 is an error in how homebrew has packaged mailcatcher.
Workaround for that is don’t install mailcatcher with homebrew. Just:

gem install mailcatcher

Results in

rack's executable "rackup" conflicts with rackup
Overwrite the executable? [yN]
ERROR:  Error installing mailcatcher:
	"rackup" from rack conflicts with installed executable from rackup

I don't want to overwrite the executable so can't install

If you can, uninstall all the versions of rackup, and install version 1.0; it won't conflict.

[sj26]

Just press “n” for now

Right, that results in not installing the gem

No, it should install the gem, it just won’t link that particular executable (which isn’t required, at least for mailcatcher)

[dsandstrom]

If you can, uninstall all the versions of rackup, and install version 1.0; it won't conflict.

Trying to get mailcatcher to work with rack 3, rackup 2.1

[dsandstrom]

Just press “n” for now

Right, that results in not installing the gem

No, it should install the gem, it just won’t link that particular executable (which isn’t required, at least for mailcatcher)

I must be missing something

[dsandstrom]

I started to look into what it would take to update this gem so it works with rack 3. Unfortunately, I couldn't even get gems to install.

The limiting factor starts with sprockets-sass. Sprockets v4 supports rack 3, but sprockets-sass hasn't been updated to support that version.

https://github.com/petebrowne/sprockets-sass/blob/master/sprockets-sass.gemspec#L39

[jameshibbard]

I ran into the same issue. The install failed because mailcatcher tried to install its own rackup executable, which conflicted with the existing one on my system. Selecting "n" aborted the install.

gem install mailcatcher
...
rack's executable "rackup" conflicts with rackup
Overwrite the executable? [yN]  n
ERROR:  Error installing mailcatcher:
	"rackup" from rack conflicts with installed executable from rackup

Rackup is pulled in by Rails itself, so uninstalling it would likely break something:

gem uninstall rackup        

You have requested to uninstall the gem:
	rackup-2.2.1

railties-8.1.0 depends on rackup (>= 1.0.0)

Instead of fighting the conflict, I switched to Mailpit, which ships as a standalone binary. You just drop the executable into your PATH and run it. It caught mails immediately and worked exactly as expected.

I'm happy to provide any debugging info if it'll help.

[spaquet]

@jameshibbard if you are interested I just suggested a massive PR with a bunch of upgrade to operate more recent Rack, Sinatra and Thin
#573

My fork is here if interested to pull from it while waiting for the maintainer to upgrade https://github.com/spaquet/mailcatcher
I also have docker (small footprint) that could be interesting for you: https://github.com/spaquet/docker-alpine-mailcatcher based on my fork.