mirror: Create mirror of a directory (copy)
In rBatt/rbLib: Library of RB's helper functions

Description Usage Arguments Details Note See Also Examples

mirror copies files from from to to, deleting any files in to that are not present in from.

1	mirror(from, to, exclude = "")

`from`	path of source directory
`to`	path of destination directory
`exclude`	character vector of files or folders to exclude; paths are relative

Uses rsync. Essentially creates a copy of from at to.

When syncing the contents of a directory, remember that it is important to include a forward slash (/) at the end of both paths a and b; omitting in the second will create an extra copy in the first. If slash omitted from both, the top level name will exist 3 times and include two replicates. This is just basic rsync syntax, but it is easy to forget.

See sync for bidirectional copying w/o deletions (syncing). See rbLib-package for package overview.

## Not run: 
# I have a project in a folder called 'CyanoIso'
# I want two copies of this folder and its contents on my computer
from <- "Documents/School&Work/WiscResearch/CyanoIso/"
to <- "Dropbox/Cyanotopes/CyanoIso/" # omitting last slash creates extra copy
exclude <- c(".git", "Data")
(mirror(from, to, exclude))

## End(Not run)