CODEWITHSUNDEEP
rubyshell
jakeonrails
jakeonrails

Reputation: 1895

Ruby shell command has different output than the shell

When I run this from the terminal:

$ grep -rnw 'PageObjects::CompanySettings::InfoPage' spec/**/*_spec.rb  | cut -d: -f1 | uniq

It returns a single result:

spec/features/admins/change_payment_method_spec.rb

When I run this command (notice InfoPage is now TeamPage:

$ grep -rnw 'PageObjects::CompanySettings::TeamPage' spec/**/*_spec.rb  | cut -d: -f1 | uniq

I get one result:

spec/features/team_page_spec.rb

Now, when I go into irb, and use the backticks to call a shell command, I get output for the second command (TeamPage), but no output for the first command (InfoPage).

2.1.6 :001 > `grep -rnw 'PageObjects::CompanySettings::InfoPage' spec/**/*_spec.rb  | cut -d: -f1 | uniq`
""
2.1.6 :002 > # No result ^^
2.1.6 :003 >   `grep -rnw 'PageObjects::CompanySettings::TeamPage' spec/**/*_spec.rb  | cut -d: -f1 | uniq`
"spec/features/team_page_spec.rb\n"
2.1.6 :004 > # One result, as expected!

Can anyone help me figure out why this is?

Upvotes: 0

Views: 54

Answers (1)

Jörg W Mittag
Jörg W Mittag

Reputation: 369458

I notice that in your first example, the file is nested several directories deep, and that you are using the non-standard ** wildcard.

My best guess is that your interactive shell supports that non-standard wildcard, but your batch shell does not.

One possible solution would be to use find instead of relying on shell wildcards. Another possibility would be to use Ruby, since you are already using Ruby anyway. (Note: grep is extremely optimized, so if you have a huge number of very large files, Ruby might be a bit slower.)

# Ruby's Dir class does support **
Dir['spec/**/*_spec.rb'].select {|filename|
  File.open(filename) {|file|
    file.each_line.any? {|line|
      line.inlcude?('PageObjects::CompanySettings::InfoPage')
    }
  }
}

[UNTESTED]

Upvotes: 1

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