Show a cross references for all classes in a set of jars.

Synopsis:

   xref [options]  <<jar path>> <[...]>

Options:

• [ -c --classes ] Show classes instead of packages
• [ -d --destination <string>* ] Match destination types
• [ -f --from ] Show references from other classes/packages (<)
• [ -j --java ] Include java.* packages
• [ -m --match <string>* ] Filter for class names, a globbing expression
• [ -n --nested ] Analyze nested JARs referenced via Bundle-ClassPath
• [ -r --referrredTo <string> ] Output list of package/class names that have been referred to
• [ -s --source <string>* ] Match source types
• [ -t --to ] Show references to other classes/packages (>)

Examples

   biz.aQute.bnd (master)$ bnd xref generated/*.jar
                              aQute.bnd.annotation > 
                    aQute.bnd.annotation.component > 
                      aQute.bnd.annotation.headers > 
                     aQute.bnd.annotation.licenses > 
                     aQute.bnd.annotation.metatype > 
                                     aQute.bnd.ant > aQute.service.reporter
                                                     org.apache.tools.ant
                                                     aQute.libg.reporter
                                                     org.apache.tools.ant.taskdefs
                                                     aQute.bnd.osgi
                                                     aQute.bnd.build
                                                     aQute.libg.qtokens
                                                     org.apache.tools.ant.types
                                                     aQute.bnd.osgi.eclipse
                                                     aQute.bnd.service.progress
                                                     aQute.bnd.service
                                                     aQute.bnd.version
                                                     aQute.bnd.build.model
                                                     aQute.bnd.build.model.clauses
                                   aQute.bnd.build > aQute.service.reporter
                                                     aQute.bnd.osgi
                                                     aQute.bnd.service
                                                     aQute.libg.command
                                                     aQute.libg.sed
                                                     aQute.bnd.version
                                                     aQute.bnd.service.action
                                                     aQute.bnd.header
                                                     aQute.lib.io
                                                     aQute.libg.reporter
                                                     aQute.bnd.osgi.eclipse
                                                     aQute.bnd.help
                                                     aQute.lib.strings
                                                     aQute.libg.generics
                                                     aQute.bnd.maven.support
                                                     aQute.libg.glob
                                                     aQute.lib.converter
                                                     aQute.lib.collections
                                                     aQute.bnd.differ
                                                     aQute.bnd.service.diff
                                                     aQute.bnd.service.repository
                                                     aQute.lib.deployer
                                                     javax.naming
                                                     aQute.lib.hex
                                                     aQute.bnd.resource.repository
                                                     aQute.bnd.url
                                                     aQute.lib.settings
                                                     aQute.bnd.service.url
                                                     aQute.bnd.service.extension
                             aQute.bnd.build.model > aQute.bnd.build.model.conversions
                                                     aQute.libg.tuple
                                                     aQute.bnd.build.model.clauses
                                                     aQute.bnd.header
                                                     aQute.bnd.properties
                                                     aQute.bnd.build
                                                     aQute.bnd.version
                                                     aQute.lib.io
                                                     org.osgi.resource
                                                     aQute.bnd.osgi
                     aQute.bnd.build.model.clauses > aQute.bnd.header
                 aQute.bnd.build.model.conversions > aQute.bnd.header
                                                     aQute.libg.tuple
                                                     aQute.bnd.osgi
                                                     aQute.bnd.build.model
                                                     aQute.bnd.build.model.clauses
                                                     org.osgi.resource
                                                     aQute.bnd.osgi.resource
                                                     aQute.libg.qtokens
                           aQute.bnd.compatibility > aQute.bnd.osgi
                               aQute.bnd.component > aQute.bnd.osgi
                                                     aQute.service.reporter
                                                     aQute.lib.collections
                                                     org.osgi.service.component.annotations
                                                     aQute.bnd.version
                                                     aQute.bnd.component.error
                                                     aQute.lib.tag
                                                     aQute.bnd.header
                                                     aQute.bnd.service
                         aQute.bnd.component.error > 
                                  aQute.bnd.differ > aQute.bnd.header
                                                     aQute.bnd.service.diff
                                                     aQute.bnd.osgi
                                                     aQute.bnd.version
                                                     aQute.service.reporter
                                                     aQute.libg.generics
                                                     aQute.libg.cryptography
                                                     aQute.lib.hex
                                                     aQute.lib.io
                                                     aQute.lib.collections
                                                     aQute.bnd.annotation
                                                     aQute.bnd.service
                        aQute.bnd.enroute.commands > aQute.lib.getopt
                                                     aQute.bnd.osgi
                                                     aQute.service.reporter
                                                     aQute.bnd.main
                                                     aQute.bnd.build
                                                     aQute.lib.io
                                aQute.bnd.filerepo > aQute.bnd.version
                                  aQute.bnd.header > aQute.bnd.version
                                                     aQute.bnd.osgi
                                                     aQute.service.reporter
                                                     aQute.libg.generics
                                                     aQute.libg.qtokens
                                                     aQute.lib.collections
                                    aQute.bnd.help > aQute.bnd.osgi

Nested JARs

By default, xref only analyzes classes directly contained in the provided JAR files. Many OSGi bundles contain nested JARs that are referenced via the Bundle-ClassPath manifest header. To analyze these nested JARs as well, use the --nested option:

   bnd xref --nested mybundle.jar

This will:

1. Parse the Bundle-ClassPath manifest header
2. Extract and analyze any embedded JAR files
3. Analyze directories referenced in the Bundle-ClassPath
4. Include cross-references from all sources in the output

For example, given a bundle with the following structure:

mybundle.jar
├── META-INF/MANIFEST.MF (Bundle-ClassPath: .,lib/internal.jar)
├── com/example/Main.class
└── lib/internal.jar
    └── com/example/internal/Helper.class

Without --nested, only com.example.Main would be analyzed. With --nested, both com.example.Main and com.example.internal.Helper classes are included in the cross-reference analysis.