module FileMutate::ReplaceContent::ClassMethods
Public Instance Methods
replace_content_from(file_name, options = {}) { || ... }
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replaces content found at replacement_expr with content resulting from yielding block File.replace_content_from ‘myfile.txt’, where => /HelloWorld/, with => ‘GoodBye’
# File lib/file_mutate/replace_content.rb, line 10 def replace_content_from file_name, options = {}, &block replacement_expr = options[:where] || options[:content] new_content = options[:with] begin replacement_expr = replacement_expr.to_regexp rescue raise ArgumentError, "Content to be replaced must be specified as either a String or Regexp in a :where or :content option" end file = get_file file_name # get existing file content content = file.read # return nil if no mathing replacement found return nil if !(content =~ replacement_expr) new_content ||= yield if block raise ArgumentError, "Content to be replaced with must be specified as a :with option or as a block" if !new_content # remove content that matches expr, by replacing with empty mutated_content = content.gsub replacement_expr, new_content # write mutated content as new file file.overwrite mutated_content true # signal success! end
Also aliased as: replace_content_in