What's wrong with installing Rails?

Question

Ruby on Rails

What went wrong and how to fix it?

$ gem i rails
Temporarily enhancing PATH for MSYS/MINGW...
Building native extensions. This could take a while...
ERROR:  Error installing rails:
        ERROR: Failed to build gem native extension.

    current directory: D:/Ruby26-x64/lib/ruby/gems/2.6.0/gems/websocket-driver-0.7.1/ext/websocket-driver
D:/Ruby26-x64/bin/ruby.exe -I D:/Ruby26-x64/lib/ruby/2.6.0 -r ./siteconf20190912-8476-1pme8ot.rb extconf.rb
creating Makefile

current directory: D:/Ruby26-x64/lib/ruby/gems/2.6.0/gems/websocket-driver-0.7.1/ext/websocket-driver
make "DESTDIR=" clean

current directory: D:/Ruby26-x64/lib/ruby/gems/2.6.0/gems/websocket-driver-0.7.1/ext/websocket-driver
make "DESTDIR="
generating websocket_mask-x64-mingw32.def
make: *** No rule to make target '/D/Ruby26-x64/include/ruby-2.6.0/ruby.h', needed by 'websocket_mask.o'.  Stop.

make failed, exit code 2

Gem files will remain installed in D:/Ruby26-x64/lib/ruby/gems/2.6.0/gems/websocket-driver-0.7.1 for inspection.
Results logged to D:/Ruby26-x64/lib/ruby/gems/2.6.0/extensions/x64-mingw32/2.6.0/websocket-driver-0.7.1/gem_make.out

Answer 1

Well it's written right there,
Maybe the MSYS2 Devkit is missing? Or the paths in the environment variables are incorrectly configured.
Without this extension, which requires compilation of C source codes into a gem, it will not be possible to install.
In addition, it is not certain that these sources are written with the Windows platform in mind. Usually they write for POSIX systems and don't bother. If not, then you should ask the author of websocket-driver to add Windows support.

Or ...

Как вариант, стоит попробовать JRuby (работает на JVM) или работать в Linux посредством Windows WSL (Windows 10)