/i_rewriter

Primary LanguageRuby

#i_rewriter

##Usage

  $ i_rewriter RUBY_EXPRESSION file

i_rewriter iterates through each line of file, evaluating RUBY_EXPRESSION in a block whose arguments are

  • index : current line index starting at 0
  • line : the current line

Each argument will be replaced in-place, with whatever your RUBY_EXPRESSION evaluates to.

#Example:

  $ i_rewriter ‘index == 0 ? “prepended text\n” + line : line’ myfile

will prepend a line with “prepended text” to myfile.

##Warranties: None. Use at your own peril. GPL2 applies. i_rewriter may corrupt your file.