Update gem `thin` to version >`1.8.0` to resolve installation issues

[jai-x]

Gem thin is required by mailcatcher and is specified within a minor version of v1.5.0: https://github.com/sj26/mailcatcher/blob/30b10049b806a64d1c12419574334f6bd1634223/mailcatcher.gemspec#L42

The installation of gem thin requires a workaround that is documented in the readme:

If you encounter issues installing thin, try: gem install thin -v 1.5.1 -- --with-cflags="-Wno-error=implicit-function-declaration"

These issues have since been resolved in https://github.com/macournoyer/thin/pull/364 and the fix is available since version v1.8.0.

Is it possible to upgrade the thin dependency or are there any blocking requirements to keep the version as is?

[sj26]

Yes there were/are a few issues preventing the upgrade. They are being worked through. Please use the documented workaround in the meantime.

[jai-x]

Thanks for the response. Of the remaining work required to upgrade, is any of it documented anywhere such that people can contribute towards helping?

[sj26]

No, it is not.

If you'd like to help, please try the latest pre-release version which has swapped out the websocket library which was preventing upgrade:

gem install --pre mailcatcher

If you find any issues please report them.

[alistairholt]

gem install --pre mailcatcher => mailcatcher-0.9.0.beta1

@sj26 this appers to have the same problem?

[sj26]

@alistairholt could you please be more specific?

The beta doesn't upgrade thin, it changes the websocket integration. I'd like to see that stable before committing to upgrading thin.

[alistairholt]

@sj26 sure. When I tried the beta I still got the same error from thin on install:

s.add_dependency "thin", "~> 1.5.0" in mailcatcher.gemspec

[mlensment]

I was struggling with installing thin for an entire night, finally I figured out I had to add "-fdeclspec" flag. I'm still running Mac OS Catalina with xcode 12.2, ruby 3.1.0 installed via rbenv.

Maybe someone finds it useful. gem install thin -v 1.5.1 -- --with-cflags="-Wno-error=implicit-function-declaration -fdeclspec" gem install mailcatcher -N

Inspiration: https://github.com/nginx/unit/issues/653

[ivopavlov87]

Had this issue. Did not need the -fdeclspec flag.

Just had to do: gem install thin -v '1.5.1' -- --with-cflags="-Wno-error=implicit-function-declaration" then was able to do: gem install mailcatcher

Qiita Source. This is a Japanese site; I used Google Translate to read. I did not need to use sudo. Translated Qiita Source.

StackOverflow Source.

System details: MacBook Pro 16-inch 2021 Apple M1 Max 32 GB Memory macOS Ventura 13.2

[sj26]

I have pushed another pre-release, v0.9.0.beta2, which relaxes the thin requirement and should support ruby 3.2. Please try it:

gem install mailcatcher --pre