Rat audits software distributions, with a special interest in headers. If this isn't quite what you're looking for then take a look at the other products developed by Apache Creadur™, including Apache Whisker™ which audits and generates legal (for example LICENSE) documents for complex software distributions.
Run from the command line with:
java -jar apache-rat-0.11.jar --help
This will output a help message detailing the command line options available to you.
Rat can be used to automatically add licence headers to files that do not currently have them. Only files that are not excluded by the Rat configurations will be affected.
To add licence headers use a command such as:
java -jar apache-rat-0.11.jar --addLicence --copyright "Copyright 2008 Foo" --force /path/to/project
This command will add the licence header directly to the source files. If you prefer to see which files will be changed and how then remove the "--force" option.
It is common to use the Rat with the Maven or Ant plugins and specify a series of files to exclude (such as a README or version control files). If you are using the Rat application instead of a plugin you can specify a series of regex excludes in a file and specify that with the -E option.
java -jar apache-rat-0.11.jar -E /path/to/project/.rat-excludes -d /path/to/project
usage: java rat.report [options] [DIR|TARBALL] Options -A,--addLicense Add the default licence header to any file with an unknown licence that is not in the exclusion list. By default new files will be created with the licence header, to force the modification of existing files use the --force option. -a,--addLicence Add the default licence header to any file with an unknown licence that is not in the exclusion list. By default new files will be created with the licence header, to force the modification of existing files use the --force option. -c,--copyright <arg> The copyright message to use in the licence headers, usually in the form of "Copyright 2008 Foo" -d,--dir Used to indicate source when using --exclude -E,--exclude-file <fileName> Excludes files matching regular expression in <file> Note that --dir is required when using this parameter. -e,--exclude <expression> Excludes files matching wildcard <expression>. Note that --dir is required when using this parameter. Allows multiple arguments. -f,--force Forces any changes in files to be written directly to the source files (i.e. new files are not created) -h,--help Print help for the Rat command line interface and exit -s,--stylesheet <arg> XSLT stylesheet to use when creating the report. Not compatible with -x -x,--xml Output the report in raw XML format. Not compatible with -s