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This
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document
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outlines
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some
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of
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the
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steps
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that
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are
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being
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taken
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to
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ensure
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as
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much
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backward
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compatibility
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with
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tools
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and
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plugins
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that
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are
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currently
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written
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against
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Maven
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2.0.x.
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Affected
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Plugins
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Maven
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Remote
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Resources
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Plugin
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- org.apache.maven.project.inheritance.ModelInheritanceAssembler#assembleModelInheritance:
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- used
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- to
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- walk
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- the
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- POMs
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- to
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- find
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- out
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- all
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- the
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- license
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- information.
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- This
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functionality
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- has
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- been
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- superceded
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- by
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- the
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- model
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- properties-based
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- system
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- for
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- POM
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- construction.
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- We
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- provide
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- the
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- same
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- functionality
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- using
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- the
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- model
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properties-based
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- system
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- but
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- have
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- just
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- placed
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- the
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- component
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- as-is
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- in
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- the
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- maven-compat
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- package
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- to
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- ensure
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- the
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- default
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- lifecycle
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- functions.
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- org.apache.maven.project.ProjectUtils:
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- placed
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- in
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- the
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- maven-compat
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- package.
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- org.apache.maven.project.MissingRepositoryElementException
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- ...
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- used
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- by
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- ProjectUtils
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Maven
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Help
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Plugin
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- org.apache.maven.project.path.PathTranslator:
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- used
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- as
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- a
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- parameter
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- in
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- the
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- EvaluateMojo.
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- The
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- path
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- translator
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- has
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- been
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- replaced
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- the
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- model
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- builder
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and
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- PomTransformer.
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Affected Components & Classes
Maven Artifact
Maven Artifact will be entirely extricated from the core of Maven 3.x and replaced with Mercury, but we will make a best effort to
ensure the compatibility of plugins that use Maven Artifact. There are, however, components and classes that are just so broken or conflict
with standard ways of doing resolution and conflict reduction that we can't support them.
Supported Compatibility
- org.apache.maven.artifact.deployer.ArtifactDeployer
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- org.apache.maven.artifact.factory.ArtifactFactory
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- org.apache.maven.artifact.handler.ArtifactHandler
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- org.apache.maven.artifact.installer.ArtifactInstaller
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- org.apache.maven.artifact.manager.WagonManager
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- (1)
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- org.apache.maven.artifact.repository.ArtifactRepository
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- org.apache.maven.artifact.repository.ArtifactRepositoryPolicy
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- org.apache.maven.artifact.repository.ArtifactRepositoryFactory
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- org.apache.maven.artifact.repository.layout.ArtifactRepositoryLayout
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- org.apache.maven.artifact.resolver.ArtifactResolver
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- org.apache.maven.artifact.resolver.filter.ArtifactFilter
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- org.apache.maven.artifact.resolver.filter.Artifact
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(1)
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In
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r746285
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various
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methods
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have
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been
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removed
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from
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the
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WagonManager
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which
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breaks
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the
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maven-project-info-reports-plugin,
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the
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maven-site-plugin
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and
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the
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maven-stage-plugin,
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e.g.
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due
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to
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a
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linkage
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error
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on
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getAuthentaticationInfo().
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Unsupported
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Compatibility
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- org.apache.maven.artifact.metadata.ArtifactMetadataSource
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- org.apache.maven.artifact.metadata.ResolutionGroup
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- org.apache.maven.artifact.repository.metadata.*
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- org.apache.maven.artifact.resolver.ResolutionNode
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- org.apache.maven.artifact.resolver.ResolutionListener
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- org.apache.maven.artifact.resolver.metadata.*
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- org.apache.maven.artifact.resolver.transform.*
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- org.apache.maven.artifact.resolver.versioning.*
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Settings
The settings are historically a CLI-based
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mechanism
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for
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setting
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preferences.
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It
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should
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have
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never
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gone
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beyond
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the
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core
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into
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plugins
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or
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other
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tools.
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Unfortunately
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we
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allowed
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the
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$
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{settings}
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expression
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in
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plugins
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and
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from
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there
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it
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made
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its
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way
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into
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components
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like
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the
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release
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manager.
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The
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release
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manager
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in
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turn
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never
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evolved
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to
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decouple
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itself
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from
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the
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settings
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and
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it
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requires
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a
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recreation
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of
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the
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entire
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Maven
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environment
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to
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work
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and
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grabs
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the
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RuntimeInfo
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info
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class
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from
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the
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settings
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in
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order
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to
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do
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this.
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Other
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plugins
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may
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require
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this
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and
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we'll
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have
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to
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find
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them
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them
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and
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push
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them
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toward
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using
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the
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Invoker
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where
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the
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Maven
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environment
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is
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taken
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care
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of
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and
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restrict/forbid
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the
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use
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of
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settings
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in
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plugins.
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Everything
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required
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is
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in
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the
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exeution
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request
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and
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therefore
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the
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session
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and
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that's
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all
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plugins
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should
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need.
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The
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changes
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made
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relate
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to
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MNG-3954,
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where
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the
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RuntimeInfo
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class
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needed
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to
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be
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partially
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rescurrected
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in
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order
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to
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make
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the
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release
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plugin
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happy.
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Changes
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to
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the
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CLI
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- Log
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- file
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- support
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- has
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- been
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- added
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- i.e
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- mvn
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- -l
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- log.txt
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- clean
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- install
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- Plugin
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- registry
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- option
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- has
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- not
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- been
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- supported
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- in
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- the
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- core
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- and
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- it
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- lagged
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- around
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- in
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- the
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- CLI
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Repositories
Support for non-unique
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SNAPSHOT
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deployments
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will
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be
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dropped.
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Profiles
Support for the profiles.xml
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will
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be
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dropped.
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Maven
...
1.x
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Support
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for
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the
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legacy
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repositories
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has
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been
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dropped.
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