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I'm super close to this website switchover to Jekyll, am on track to migrating from WordPress setup for Unix Tutorial by May 1st 2020.
Putting some final touches in, I was investigating how RSS (Atom, actually) feeds work in Jekyll, and wanted to have a look at one of the jekyll plugins: jekyll-feed.
Since all the plugins in Jekyll are actually Ruby gems installed and managed by the bundler package, it was relatively easy to know where to look.
I couldn't find any jekyll-feed files in my Jekyll directory for the website, and so I had to learn a bit more about working with gems.
Show RubyGems Environment
There's a really cool command called "gem environment" that shows 99% of all the Ruby gems related information on your system:
greys@mcfly:~ $ gem environment RubyGems Environment: RUBYGEMS VERSION: 3.0.6 RUBY VERSION: 2.6.5 (2019-10-01 patchlevel 114) [x86_64-darwin18] INSTALLATION DIRECTORY: /usr/local/lib/ruby/gems/2.6.0 USER INSTALLATION DIRECTORY: /Users/greys/.gem/ruby/2.6.0 RUBY EXECUTABLE: /usr/local/opt/ruby/bin/ruby GIT EXECUTABLE: /usr/local/bin/git EXECUTABLE DIRECTORY: /usr/local/lib/ruby/gems/2.6.0/bin SPEC CACHE DIRECTORY: /Users/greys/.gem/specs SYSTEM CONFIGURATION DIRECTORY: /usr/local/Cellar/ruby/2.6.5/etc RUBYGEMS PLATFORMS: ruby x86_64-darwin-18 GEM PATHS: /usr/local/lib/ruby/gems/2.6.0 /Users/greys/.gem/ruby/2.6.0 /usr/local/Cellar/ruby/2.6.5/lib/ruby/gems/2.6.0 GEM CONFIGURATION: :update_sources => true :verbose => true :backtrace => false :bulk_threshold => 1000 REMOTE SOURCES: https://rubygems.org/ SHELL PATH: /usr/local/opt/mysql@5.7/bin /Library/Frameworks/Python.framework/Versions/3.6/bin /Users/greys/bin /usr/local/opt/ruby/bin /usr/local/bin /usr/bin /bin /usr/sbin /sbin
Turns out, the jekyll-feed plugin files were under one of the GEM PATHS locations /usr/local/lib/ruby/gems/2.6.0 in my case.
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