            --------------------------
              Release notes for XMvn
            --------------------------
                 Mikolaj Izdebski
            --------------------------
                    2017-06-20


Release notes for XMvn

* What's new in XMvn 3.0.0

  XMvn 3.0.0 was released on 2017-06-20.  Most important changes
  include:

  * API changes

    * New <<<Configurator>>> API

      XMvn 3.0.0 adds Configurator API service, which exposes XMvn
      configuration as Java beans.

    * New <<<MetadataResolver>>> API

      XMvn 3.0.0 adds new API service - <<<MetadataResolver>>>, which
      allows resolution of metadata for artifacts installed in the
      system.

    * Service locator API

      Instances of services provided by XMvn API can now be obtained
      using service locator, without using dependency injection.  This
      change obsoleted XMvn Launcher module, which was removed in XMvn
      3.0.0.

    * New default compiler source setting

      Since XMvn 3.0.0 <<<compilerSource>>> setting has a new default
      value equal to <<<1.6>>>.

  * Changes in binary distribution

    * Launcher scripts removed from binary tarball

      Launcher scripts for tools, such as <<<xmvn-resolve>>>,
      <<<xmvn-install>>> etc., as well as <<<xmvn>>> launcher, were
      removed.  From now on, tools can be ran using <<<java -jar>>>
      syntax and XMvn itself can be ran using standard <<<mvn>>>
      launcher.  This is upstream change only - downstream
      distributions may continue to provide distro-specific launchers.

    * Ivy connector removed from binary tarball

      Since XMvn 3.0.0, connector for Apache Ivy is no longer included
      in binary tarball.

  * New features

    * Ignoring duplicate metadata made configurable

      XMvn versions prior to 3.0.0 would previously always ignore
      installed artifacts, which have multiple metadata, for example
      when more than one package provides the same artifact.  XMvn
      3.0.0 added new option <<<ignoreDuplicateMetadata>>>, which can
      be used to control this behavior.
      <<<ignoreDuplicateMetadata>>> is <<<true>>> by default, but when
      set to <<<false>>> XMvn will resolve metadata for the first
      artifact found, ignoring others.

    * POM files for Tycho projects are not installed

      Projects built with Eclipse Tycho install JAR files in private
      locations specific to Eclipse, so POM files and metadata for
      them are not installed.

    * PoC implementation of Javadoc MOJO

      XMvn 3.0.0 added new MOJO, which can be used to generate API
      documentation (javadocs) as alternative to Maven Javadoc Plugin.
      Goal <<<xmvn-mojo:javadoc>>> works in similar way to
      <<<javadoc:aggregate>>>, but it has some advantages over it.
      XMvn javadoc makes javadocs more consistent between packages -
      it unifies javadoc options, doclet used, CSS styles, and so on.
      It opens possibilities for better integration with distributions
      in the future, like for example distro-specific themes, links or
      dependencies between javadoc packages.  It also has much fewer
      dependencies, which means smaller builroots and faster builds.

    * More accurate builddep MOJO

      Builddep MOJO, which can be used for auto-generating
      build-requires, was rewritten almost from scratch.  Now its
      output should be much more accurate.

    * Partial compatibility with Maven 3.0

      XMvn 3.0.0 restores partial compatibility with Maven 3.0.

  * Bug fixes

    * Ignoring runtime exceptions during bytecode analysis

      Previously XMvn Installer would terminate abnormally on bytecode
      it couldn't parse, such as newer bytecode than recognized by ASM
      library which XMvn uses.  This has been fixed in XMvn 3.0.0.

    * Coping with whitespaces in file names

      When installing files with whitespace in their names, XMvn
      Installer would previously generate incorrect file descriptor.
      XMvn 3.0.0 fixes this bug.

  * Other changes

    * Release on Maven Central Repository

      Since 3.0.0 XMvn will be available in Maven Central Repository.

    * Migrated from fedorahosted.org to GitHub

      Since fedorahosted.org, the service that XMvn used to be hosted
      on, was decommissioned, XMvn source repository was moved to new
      home, which is now at GitHub:
      https://github.com/fedora-java/xmvn/

* What's new in XMvn 2.5.0

  XMvn 2.5.0 was released on 2015-10-28.  Most important changes
  include:

  * Major features

    * XMvn Gradle plugin

      XMvn Gradle plugin was implemented in version 2.5.0.  When
      applied on a project, this plugin automatically configures
      repositories in local mode, so that project dependencies can be
      resolved from system repository.  It also provides
      <<<xmvnInstall>>> task, which can be used to install artifacts
      produced by the build with XMvn Installer.

    * Custom buildroot option for XMvn Subst

      XMvn Subst now accepts a new option, <<<--root>>>, which
      specifies buildroot from which XMvn should resolve artifacts, in
      addition to standard locations.  This option can be used for
      symlinking JARs produced during build.  (Bug: 1226251)

  * Major bugfixes

    * Builddep MOJO fixes

      Builddep MOJO was rewritten from scratch.  The new code is more
      generic and supports many corner case in which the previous
      version produced incorrect results (bugs: 1217422, 1217425,
      1217462, 1217473).

  * Minor features

    * Warning when builddep MOJO is ran with pure Maven

      XMvn builddep MOJO 2.5.0 will print a warning when it's ran
      outsides of XMvn.

    * Allowing manifacs injection for invalid JAR files

      OpenJDK has a sanity check that prevents adding duplicate
      entries to ZIP streams.  When trying to inject manifests to JAR
      files with duplicate entries XMvn would previously fail with
      "ZipException: duplicate entry".  XMvn 2.5.0 added a workaround
      that allows manifest injection to such invalid JAR files.

  * Minor bugfixes

    * GradleResolver crash when resolving tools.jar

      XMvn 2.5.0 fixes a bug that caused Gradle resolver crash when
      trying to resolve tools.jar artifact.

    * Crash when effective POM generation failed

      XMvn 2.5.0 fixes a bug that caused crash with
      NullPointerException uppon failure to generate effective POM.

    * Slashes in effective POM names are replaced with dots

      XMvn versions prior to 2.5.0 would try to create effective POM
      files with artifactID as name, even if it contain slash
      character.  XMvn 2.5.0 fixes this bug.

  * Other changes

      XMvn 2.5.0 drops support for rarely-used compatibility
      configuration suffixes.

* What's new in XMvn 2.4.0

  XMvn 2.4.0 was released on 2015-05-06.  Most important changes
  include:

  * Major features

    * Support for Mock pm_request plugin

      XMvn 2.4.0 supports on-demand artifact installation via Mock
      pm_request plugin.  When this plugin is enabled then XMvn will
      try to install any missing artifacts instead of failing.

  * Major bugfixes

    * Java requires

      Generation of Java requires (rhbz#1086335) was fixed in this
      XMvn release.

  * Minor features

    * Effective POM caching

      XMvn 2.4.0 fixes tries to avoid creating polluting system with
      temporary files.  In particular effective POMs are cached in XDG
      cache directory.

* What's new in XMvn 2.3.2

  XMvn 2.3.2 was released on 2015-03-12.  Most important changes
  include:

  * Minor bugfixes

    * NullPointerException during model validation

      XMvn 2.3.2 fixes a NullPointerException regression in
      XMvnModelValidator, which occured during validation of models
      without build instructions.

* What's new in XMvn 2.3.1

  XMvn 2.3.1 was released on 2015-02-13.  Most important changes
  include:

  * Major bugfixes

    * Installation of multiple artifacts in one directory

      Version 2.3.1 fixes a bug that caused XMvn Install to fail when
      trying to install multiple artifacts to the same directory.

  * Minor features

    * Optional dependencies in effective POM

      Since version 2.3.1 effective POMs generated by XMvn include
      information whether given project dependency is optional or not.

* What's new in XMvn 2.3.0

  XMvn 2.3.0 was released on 2015-02-11.  Most important changes
  include:

  * Major features

    * Ownership of generated directories

      XMvn Install 2.3.0 generates RPM directory ownership (%dir) for
      subdirectories it creates.

    * Minimal compiler source/target 1.6

      XMvn now enforces source and target values of at least 1.6 in
      Maven Compiler Plugin.

    * Deployer optional dependencies

      Metadata format used in 2.3.0 contains new field, which can be
      used to flag any artifact dependency as optional.  XMvn deployer
      and installer were modified to set this flag for generated
      metadata.

  * Minor bugfixes

    * Skip generating %attr for symbolic links

      XMvn 2.3.0 doesn't generate RPM file attributes (%attr) for
      symbolic links it creates, which prevents RPM warnings.

  * Other changes

    * Depmap support dropped

      XMvn 2.3.0 removes support for depmaps, which was deprecated for
      some time.

    * Dependecy on Java 8

      XMvn now requires Java 8 to run.

* What's new in XMvn 2.2.1

  XMvn 2.2.1 was released on 2015-02-04.  Most important changes
  include:

  * Major bugfixes

    * Ivy connector regression bugfix

      XMvn 2.1.1 introduced regression in Ivy connector, which
      prevented parent POMs from being resolved correctly.  Version
      2.2.1 fixes this regression.

* What's new in XMvn 2.2.0

  XMvn 2.2.0 was released on 2015-01-23.  Most important changes
  include:

  * Major features

    * Gradle connector

      XMvn 2.2.0 includes connector for Gradle, which provides
      integration of Gradle with XMvn.  It provides an adapter which
      allows XMvn resolver to be used as Gradle resolver.

* What's new in XMvn 2.1.1

  XMvn 2.1.1 was released on 2015-01-05.  Most important changes
  include:

  * Minor bugfixes

    * Software collection support

      Several bugs related to support for software collections were
      fixed.

    * OSGi artifact installation

      XMvn MOJO now correctly passes fully qualified OSGi artifact
      verions to Eclipse P2 installer.

   * Resolution of Ivy artifacts with classifiers

      XMvn 2.1.1 fixes a bug which could cause some Ivy artifacts with
      classifiers not to be resolved correctly in some cases.

* What's new in XMvn 2.1.0

  XMvn 2.1.0 was released on 2014-09-04.  Most important changes
  include:

  * Minor features

    * Metadata format improvement

      <<<requestedVersion>>> field in artifact metadata was made
      optional with default value of "SYSTEM".

    * Temp file cleanup

      Upon JVM termination XMvn will now remove more temporary files
      to conserve disk space.

    * Eclipse plugin detection

      XMvn 2.1.0 will refuse to install Eclipse plugins if XMvn P2
      plugin is not installed.  (This plugin is shipped as a part of
      fedoraproject-p2.)

    * Javadoc report location capture

      Now XMvn will properly detect exact location where Maven Javadoc
      Plugin saves generated API documentation to allow other tools to
      refer to this location.

    * Compiler options capture

      During build XMvn now captures compiler source and target used
      to build each module.  These values can be later used by other
      tools to generate dependencies on particular Java version.

  * Minor bugfixes

    * Merge dependencies when merging metapackages

      This release of XMvn fixes a bug which prevented artifact
      dependencies to be merged in package metadata, which could
      result in incomplete package requires.

    * Fix crashes during artifact installation

      XMvn 2.1.0 fixes some crashes during artifact installation.

* What's new in XMvn 2.0.1

  XMvn 2.0.1 was released on 2014-06-06.  Most important changes
  include:

  * Minor features

    * Property to disable effective POMs

      XMvn 2.0.1 allows to globally disable generation and resolution
      of effective POMs by setting system property
      <<<xmvn.resolver.disableEffectivePom>>>

  * Minor bugfixes

    * Fixed JAR post-processing during installation

      In some cases XMvn 2.0.0 may have failed to inject Javapackages
      manifest entries to JARs it installs.  It also failed to detect
      native code inside JARs.  This was fixed in XMvn 2.0.1.

    * Fixed return code of <<<xmvn-install>>>

      XMvn Installer CLI used to return zero exit code even if
      installation failed.  This was corrected in XMvn 2.0.1.

    * Implemented lazy loading of metadata

      XMvn spawns background threads to initialize some "eager"
      singletons in order to minimize delay on their first use and
      improve overall performance.  Since Java allows isolated class
      realms to have multiple singleton instances, hundreds of
      initializer threads may have be spawned in applications heavily
      using isolated realms, such as in unit testing.

      XMvn 2.0.1 implemented lazy initialization instead of eager
      initialization, which results in lower performance, but better
      worst-case behavior.

    * Fixed artifact resolution from local workspace repository

      XMvn 2.0.1 fixes a regression introduced in version 2.0.0 -
      artifacts were no longer resolved from local workspace
      repository (<<<$PWD/.m2>>>).

* What's new in XMvn 2.0.0

  XMvn 2.0.0 was released on 2014-05-29.  Most important changes
  include:

  * Major features

    * New metadata format

      XMvn 2.0.0 now reads and writes the new Javapackages metadata
      format instead of dependency maps.  Read-only depmap support
      remains, but was deprecated.

    * Ivy integration

      Starting with version 2.0.0 XMvn provides a connector for Apache
      Ivy which enables Ivy or its clients to have access to XMvn
      resolver and deployer.

      This feature enables Ant build scripts using Ivy tasks or other
      build systems that use Ivy to use local system artifact
      repository to resolve dependencies and more, making Ivy a
      first-class citizen among other build systems.

    * Artifact deployment

      Starting with version 2.0.0 XMvn provides an API to deploy
      artifacts to system repositories.

    * API separation

      XMvn 2.0.0 ships with a separate API module, which makes it more
      clear which parts of XMvn are part of public interface and which
      are considered as implementation details.

    * Class loader isolation

      XMvn 2.0.0 Core implementation is now using an isolated class
      loader to prevent unwanted classes from polluting Maven Core or
      user classpath.

  * Minor features

    * Improved logging

      XMvn logging was ported from Plexus to SLF4J.  This makes it
      possible to easily set different logging levels for different
      subsystems as well as use a custom backend.

      Besides that some logging messages were improved and new ones
      were added.

    * Dependency version report

      At the end of a build XMvn can now print a dependency version
      report, which contains information about requested and resolved
      dependency artifact versions.

    * Improved Tycho integration

      XMvn 2.0.0 works better with Eclipse Tycho.  In particular
      system-scoped OSGi dependencies injected by Tycho are now
      ignored and don't cause installation failures any longer.

    * Repository filtering

      XMvn 2.0.0 improves artifact filtering for installation
      repositories.

  * Other changes

    * Migration to JSR-330

      Internal dependency injection mechanisms were migrated from Sisu
      Plexus to Sisu Inject, which provides JSR-330-compatible IoC
      mechanisms.

    * XMvn Connector rename

      <<<xmvn-connector>>> module was renamed to
      <<<xmvn-connector-aether>>> to reflect addition of the new
      <<<xmvn-connector-ivy>>> module.

    * Removal of deprecated API

      Parts of XMvn API which were marked as deprecated were removed.

    * Namespace cleanup

      Java package names were renamed from
      <<<org.fedoraproject.maven>>> to <<<org.fedoraproject.xmvn>>>.

    * XMvn Installer rewrite

      XMvn Installer was rewritten from scratch in 2.0.0 and a new
      pluggable API was added.

    * Effective POM installation

      Effective POM's are no longer installed during package build.
      XMvn resolver is able to generate them on demand during package
      build from the new Javapackages metadata.

* What's new in XMvn 1.4.0

  XMvn 1.4.0 was released on 2013-12-09.  Most important changes
  include:

  * Minor features

    * Limited support for absolute JPP artifact files

      Artifact files specified as absolute paths pointing to arbitrary
      locations are now allowed.  They are implemented as symbolic
      links which are pointing to the primary artifact file, which
      must be explicitly specified as non-absolute file.

      Appropriate suffixes are added depending on artifact version,
      classifier and extension.  As absolute symlinks can be placed at
      any location, configured repositories are not taken into account
      and flat repository layout is always assumed.

      Absolute symlinks are only created for artifact files and
      attached artifacts, but not for POM files.  Absolute files for
      artifacts with no files (i.e. POM artifacts) are silently
      ignored.

  * Minor bugfixes

    * Fix NullPointerException bug in installer code

    * Allow file installation in root directory

      XMvn was unable to install files in root directory because of
      false assumption that every directory has a parent.  This was
      fixed in version 1.4.0.

* What's new in XMvn 1.3.0

  XMvn 1.3.0 was released on 2013-11-05.  Most important changes
  include:

  * Major features

    * Installation of Ivy modules

      Since version 1.3.0 XMvn can install Ivy modules.  Ivy
      descriptor files are transparently converted to Maven POMs and
      installed as such.  This feature is still experimental.

  * Major bugfixes

    * Fix manifest injection

      XMvn no longer injects manifests to JAR files that have no
      manifests.  This also fixes a bug that caused POM files to be
      replaced with empty JAR files in some cases.

    * Delay simplification of effective POMs

      Effective POMs are now simplified during package installation,
      not build.  This way installer has enough information needed to
      generate auto-requires on Java version.

    * Make resolver ignore artifact types

      Configured artifact types by repositories no longer affect
      behaviour of XMvn resolver, but are still understood by
      installer.

  * Minor bugfixes

    * Fix potential resource leaks

      XMvn 1.3.0 fixes a few bugs in which certain resources (mostly
      files) were not released (closed) even when they were no longer
      needed.

* What's new in XMvn 1.2.0

  XMvn 1.2.0 was released on 2013-10-18.  Most important changes
  include:

  * Minor features

    * Artifact information in manifests

      Since version 1.2.0 XMvn injects artifact coordinates to
      manifests of artifact files it installs.  XMvn Subst can read
      this information and use it to locate artifacts in the system.
      This way artifacts that do not contain pom.properties can still
      be correctly replaced with symbolic links by XMvn Subst.

    * Artifacts using native code

      Previous versions only tried to detect artifacts containing
      native code.  In addition to that XMvn version 1.2.0 also
      attempts to detect JAR files using native code.  This means that
      such JARs can be installed to a different location than JARs not
      containing and not using native code.

  * Major bugfixes

    * Stereotype support in auto-requires

      XMvn Installer did not take into account artifact stereotypes.
      This caused generated auto-requires to be incorrect in some
      cases.  This bug was partially fixed by embedding default Maven
      artifact type mappings.  This means that any non-standard
      stereotypes may still be handled incorrectly and produce
      unsatisfiable dependencies.

    * Generated self-requires

      Auto-requires generator was corrected to generate correct
      auto-requires in complex cases involving compatibility versions,
      namespaces and dependencies on artifacts provided by the same
      package.

* What's new in XMvn 1.1.0

  XMvn 1.1.0 was released on 2013-09-30.  Most important changes
  include:

  * Major bugfixes

    * Dangling symlinks

      Version 1.1.0 fixes a bug that caused relative symbolic links
      creted by XMvn to be incorrect in many cases.

  * Minor features

    * Improved debugging messages

      XMvn 1.1.0 tries to better describe reasons of build failure.
      Some new logging messages were introduced.  New useful data was
      added to some other messages.  Effective packaging rules are
      printed even for skipped artifacts.

    * Strict mode of XMvn Subst

      XMvn Subst 1.1.0 introduced a new option -- strict mode.  In
      this mode XMvn Subst will fail if there are any artifacts that
      were unable to replace with symbolic links.

    * Dry run mode of XMvn Subst

      XMvn Subst 1.1.0 supports dru run.  In this mode it will fail
      not replace any artifacts, but report what would be normally
      done.

    * Skipped artifacts

      Metadata generated by XMvn 1.1.0 and later versions includes
      information about artifacts which were part of Maven reactor,
      but were not installed.  This information will be used by Java
      Packages Tools for performing better sanity checks on built
      packages.

    * Compressed metadata files

      XMvn 1.1.0 can read metadata files compressed with GNU zip.  For
      bigger files this will allow them to be stored entirely in
      i-nodes and therefore improve performance and decrease disk
      usage.

* What's new in XMvn 1.0.2

  XMvn 1.0.2 was released on 2013-09-20.  Most important changes
  include:

  * Major bugfixes

    * Missing requires on parent POM artifacts

      Version 1.0.0 introduced a regression -- automatic dependencies
      on parent POM packages were no longer generated.  Version 1.0.2
      fixes this regression.

  * Minor bugfixes

    * Missing sanity checks for missing models

      In version 1.0.2 more strict sanity checks were added for cases
      when artifacts were installed with missing model (POM) files.

* What's new in XMvn 1.0.0

  XMvn 1.0.0 was released on 2013-09-09.  Most important changes
  include:

  * Major features

    * Flexible repositories

      Since version 1.0.0 XMvn has a new way of configuring
      repositories from which artifacts are resolved and to which they
      are installed.  Several aspects of artifact resolution which
      were hardcoded in previous versions of XMvn are configurable
      since version 1.0.0.

    * Classifiers and extensions

      Previous versions of XMvn lacked support for artifact
      classifiers and for artifact extensions other than <<<jar>>> and
      <<<pom>>>.  Since version 1.0.0 XMvn supports resolution and
      installation of artifacts with any classifier and extension.

    * Compatibility versions

      Although previous versions were able to resolve versioned
      artifacts (also knows as compatibility versions), there was no
      support for installing versioned artifacts.  Since version 1.0.0
      XMvn fully supports compatibility versions -- it is able to both
      resolve and install versioned artifacts.

    * Installing artifacts not produced in reactor

      Sometimes there is a need to install artifacts not produced in
      Maven reactor, but generated by other means, like custom script
      or other build system.  Since version 1.0.0 XMvn allows
      installation of such artifacts along with artifacts produced by
      Maven build.

    * Artifact namespaces

      XMvn 1.0.0 allows artifacts to have namespaces, which limits
      possible name clashes and allows several versions of the same
      artifact to be installed more easily without the need to use
      compatibility versions.  This feature can be used to implement
      support for software collections.

  * Minor features

    * Improved performance of resolver

      Reading depmap fragments is the dominant operation when running
      short-living tools like XMvn Resolve or XMvn Subst.  Since
      version 1.0.0 depmaps are being read in parallel, which improves
      performance on multi-processor systems.

    * Improved build-requires generator

      Dependency did not include all possible cases when generating
      build-requires.  This has been improved in XMvn 1.0.0.

    * Improved support for compatibility versions

      Versioned artifacts are now resolved in simpler and more obvious
      way.

    * Improved handling of Java versions

      Besides standard versions like 1.4 or 1.7 XMvn now recognizes
      other visioning schemes like 7.0 or 7, as well as <<<jsr14>>>
      and <<<cldc1.1>>>.

    * Improved error handling in command-line tools

      Command like tools now print better error messages and are less
      likely to print stack traces for user errors.

  * Minor bugfixes

    * Possible concurrency bug when creating symbolic links

      Possible concurrency bug when creating symbolic links was
      avoided by using file system atomic operations, if supported by
      file system.

* What's new in XMvn 0.5.0

  XMvn 0.5.0 was released on 2013-05-24.  Most important changes
  include:

  * Major features

    * XMvn Subst

      Version 0.5.0 brings a new tool - XMvn Subst.  This tool is able
      to replace individual artifact files with symbolic links to
      corresponding files in system artifact repository.  It is also
      able to recursively process whole directories.

    * XMvn Bisect

      Since version 0.5.0 a new tool - XMvn Bisect - is available.
      This tool helps automating debugging build failures using
      bisection method.  It first builds project using dependencies
      coming from system repository only, next only from remote
      repositories, then halves dependency set recursively until it
      finds differences which are causing build failure.

  * Minor features

    * Basic support for dependency version ranges

      In previous versions XMvn did not support dependency version
      ranges.  If range was used in POM then Maven would try to
      resolve all available versions from remote repository and pick
      the best match.

      Starting from XMvn 0.5.0 any dependency version ranges without
      recommended version specified are replaced with version
      <<<SYSTEM>>>, which means default artifact version in the
      system.  This prevents Maven from trying to use remote
      repositories.

    * Improved configuration loading

      Starting from version 0.5.0 configuration is read only once at
      the beginning of the build.  In previous versions configuration
      was read every time it was needed.  The new approach is not only
      faster, but also allows configuration to be modified by plugins
      during runtime.

    * Better handling of inaccurate configuration

      In previous versions any packaging rules that didn't match any
      artifact in the reactor were silently ignored.  Since version
      0.5.0 any non-optional packaging rule that is not used causes
      the build to fail.

  * Minor bugfixes

    * Incorrect path to JPP artifacts

      Paths to JPP artifacts containing more than one slash in groupId
      were generated incorrectly.  This could cause dependency
      resolution failures in some rare cases.  This bug was fixed in
      version 0.5.0.

    * Fixed exit code of XMvn Resolve

      Now <<<xmvn-resolve>>> returns 0 when it successfully resolves
      all artifacts, 1 on failure to resolve one or more artifacts and
      2 when some other error occurs.  In the last case a stack trace
      is printed too.

    * Fixed installation of artifact marked as not installable

      Before version 0.5.0 XMvn tried to find installers for all
      artifacts in the reactor, even for those marked as not
      installable.  As a result reactors that contained artifacts with
      unsupported packaging types failed to build, even if instalation
      of these artifacts was explicitly skipped.

      This bug was fixed in XMvn 0.5.0, in which artifact packaging
      type has to be supported only if the artifact is installable.

* What's new in XMvn 0.4.2

  XMvn 0.4.2 was released on 2013-04-09.  Most important changes
  include:

  * Minor bugfixes

    * Empty fields in artifact aliases

      Version 0.4.0 introduced a regression - empty fields in artifact
      aliases were not replaced by corresponding fields from the main
      artifact.  This bug was fixed in version 0.4.2.

* What's new in XMvn 0.4.1

  XMvn 0.4.1 was released on 2013-03-21.  Most important changes
  include:

  * Minor bugfixes

    * Read configuration files in sorted order

      In previous versions configuration files were read in in the
      system default order.  This was causing unpredictable results in
      cases where the order of configuration did matter.

    * Correctly handle conflicts between explicit packaging rules and
      implicit singleton packaging rule

      Previously it was unspecified which of rules would take
      precedence.  Since version 0.4.1 the first rule encountered will
      be used.

    * Don't set scope of optional compile dependencies to <provided>

      The code that was setting scope of optional dependencies to
      <provided> was removed.  This code was meant to be used for
      testing only and it was never supposed to make into a stable
      release.

* What's new in XMvn 0.4.0

  XMvn 0.4.0 was released on 2013-03-15.  Most important changes
  include:

  * Major features

    * Improved configuration

      Starting from version 0.4.0 XMvn is configured using XML
      configuration files instead of environmental variables.  The
      configuration model was built using Modello and it's fully
      documented.  The XML model supports new configuration options,
      it's more flexible and has new features, such as inheritance of
      different configuration files.

    * Improved bootstrapping

      Prior to version 0.4.0 XMvn used to be bootstrapped using a
      custom launcher code.  In version 0.4.0 XMvn Launcher module was
      dropped and bootstrapping process was migrated to standard
      Classworlds launcher.  Now the bootstrap process can be
      controlled with standard <<<m2.conf>>> file.

    * New site

      Now XMvn site is created from XMvn POM using Maven Site Plugin.
      It contains much more detailed information about the project,
      including release notes, Javadocs, source cross-reference and
      much more.

  * Major bugfixes

    * XMvn installation now uses standard Maven directory layout,
      which improves integration with other Maven components and fixes
      problems with Maven Invoker.

  * Minor features

    * Improved support for Fedora Software Collections

    * Enhanced artifact blacklist

    * Improved logging

    * Added m2eclipse configuration to POM

    * Javadocs use API diagrams generated with Graphviz

  * Minor bugfixes

    * Many minor bugfixes, see git log for a full list
