diff options
Diffstat (limited to 'activesupport/lib/active_support/core_ext/string/strip.rb')
| -rw-r--r-- | activesupport/lib/active_support/core_ext/string/strip.rb | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/activesupport/lib/active_support/core_ext/string/strip.rb b/activesupport/lib/active_support/core_ext/string/strip.rb new file mode 100644 index 0000000000..086c610976 --- /dev/null +++ b/activesupport/lib/active_support/core_ext/string/strip.rb @@ -0,0 +1,26 @@ +require 'active_support/core_ext/object/try' + +class String + # Strips indentation in heredocs. + # + # For example in + # + # if options[:usage] + # puts <<-USAGE.strip_heredoc + # This command does such and such. + # + # Supported options are: + # -h This message + # ... + # USAGE + # end + # + # the user would see the usage message aligned against the left margin. + # + # Technically, it looks for the least indented line in the whole string, and removes + # that amount of leading whitespace. + def strip_heredoc + indent = scan(/^[ \t]*(?=\S)/).min.try(:size) || 0 + gsub(/^[ \t]{#{indent}}/, '') + end +end |