Ant check existence for a set of files

Question

In ant, how can i check if a set of files (comma-separated list of paths) exist or not?

For example I need to check if all paths listed in myprop exist

Answer 1

You can use a combination of a filelist, restrict and condition task for this.

In the below example a filelist is created from the property with the comma-separated list of files. Using restrict a list of the files that don't exist is found. This is placed in a property which will be empty if all the files are found.

You could use something like this to generate a failure message listing the missing files: