Penlight Documentation

## testclone.lua

    --cloning a directory tree.
    local lfs = require 'lfs'
    local path = require 'pl.path'
    local dir = require 'pl.dir'

    local p1 = [[examples]]
    local p2 = [[copy/of/examples]]

    if not path.isfile 'examples/testclone.lua' then
    	return print 'please run this in the penlight folder (below examples)'
    end

    -- make a copy of the examples folder
    dir.clonetree(p1,p2,dir.copyfile)

    assert(path.isdir 'copy')

    print '---'
    local t = os.time()
    print(lfs.touch('examples/testclone.lua',t,t+10))

    -- this should only update this file
    dir.clonetree(p1,p2,
    function(f1,f2)
      local t1 = path.getmtime(f1)
      local t2 = path.getmtime(f2)
      --print(f1,t1,f2,t2)
      if t1 > t2 then
    	dir.copyfile(f1,f2)
    	print(f1,f2,t1,t2)
      end
      return true
    end)

    -- and get rid of the whole copy directory, with subdirs
    dir.rmtree 'copy'

    assert(not path.exists 'copy')

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