Windows file association with ruby

Question

i am trying to change windows file association via ruby. Assoc part works but ftype does not work why it does not work?

    pth = Dir.pwd
    pth << "/pfReader.exe"

    pth.gsub "/","\\"


    system("assoc .pf=pfReader")
    puts("assoc command is done \n")
    system("ftype pfReader = '#{pth}' '%1'")
    puts("ftype command is done \n")

Answer 1

A good hint to debug problems like these is to replace system with puts. If you do that, you will realize the problem is on this line:

pth.gsub "/","\\"

While you probably wanted this:

pth.gsub! "/","\\"

Also I'm not sure the Windows cmd.exe likes single quotes, so you probably need to fix your ftype call also to use the proper double quotes:

system("ftype pfReader=\"#{pth}\" \"%1\"")