relativizeFilename -- relativize a file name

Synopsis

• Usage:

  relativizeFilename(dir,fn)

• Inputs:

  • dir, a path to a directory
  • fn, a path to a file
• Outputs:

  • a relativized path, equivalent to fn when starting from dir

Description

i1 : relativizeFilename("a/b/","a/b/c/d")

o1 = c/d

i2 : relativizeFilename("a/b/c/d","a/b/")

o2 = ../../

i3 : relativizeFilename("a/b/c/d","a/b/e/f")

o3 = ../../e/f