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Contents
module SugarHigh
module FileMutate
module ReplaceContent
def replace_content options = {}, &block
File.replace_content_from self.path, options, &block
end
module ClassMethods
# replaces content found at replacement_expr with content resulting from yielding block
# File.replace_content_from 'myfile.txt', where => /HelloWorld/, with => 'GoodBye'
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
alias_method :replace_content_in, :replace_content_from
end
end
end
end
Version data entries
23 entries across 23 versions & 1 rubygems