optipng: Run OptiPNG on all PNG files under a directory
Description
Call the command optipng via system2() to optimize all PNG
files under a directory.
Usage
optipng(dir = ".", files = all_files("[.]png$", dir), ...)Arguments
- dir
- Path to a directory. 
- files
- Alternatively, you can choose the specific files to optimize. 
- ...
- Arguments to be passed to - system2().