Ruby Scripts To Make Life Easier

Introduction to subprocesses and how to use them for everyday use.

Transcript

1. Ruby Scripts to Make Life Easier #MakeRubyGreatAgain
2. @PauloAncheta
3. We make alias-es all the time. We should make something more useful.
4. # talk.rb system “echo hello world” $ ruby talk.rb hello world
5. # talk* #! bin/env ruby `echo hello world` $ mv talk.rb talk $ chmod u+x talk $ ./talk hello world
6. # talk* #! bin/env ruby string = “hello world” `echo #{string}` $ ./talk hello world
7. # talk* #! bin/env ruby string = “hello world” `echo #{string.gsub(/world/, “VanRuby”) } | grep file.txt` $ ./talk | more file.txt hello VanRuby
8. $ irb irb(main):001:0> files = `ls` => “Applications\nDesktop\nDocuments\nDow nloads\nLibrary\nMovies\nMusic\nPictur es\nPublic\ntalk\n” irb(main):002:0> files.class => String
9. irb(main):003:0> system `ls` => true
10. All of that is great. How can I be productive doe?
11. # clean-pg* #! bin/env ruby pg = `ps aux | grep postgres | grep waiting` pg = pg.split(/\n/) pg.each do |waiting| # ... some process to get the pid `kill #{pid}` end
12. # split-branch* #! bin/env ruby # commits => 1z2y3 TICKET-number msg specific_commits = `git log - -pretty - -oneline | grep #{ARGV}` `git checkout master && git pull origin master && git checkout -b test-branch` specific_commits.each do |commit| sha = commit[0..6] # => [123asdf, qwer456, … ] `git cherry-pick #{sha}` end
13. #MakeRubyGreatAgain