mirror of https://github.com/sbt/sbt.git
39 lines
2.2 KiB
Plaintext
39 lines
2.2 KiB
Plaintext
Goals/Guidelines for xsbt
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=====
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As usual:
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- Immutable interfaces
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- Typesafe
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- Robust, flexible API
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ISSUES
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- Scala issue #2265: cannot use structural types or libraries that use structural types, or OOME: PermGen will occur. Running/testing user code with structural types might also cause OOME, but is unlikely unless the Scala standard library or compiler uses structural types.
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TODO
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- launcher interface versioning
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Task engine
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- method tasks will be normal tasks that pull the command line from a CommandLine task
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- possibly have per task logging, including configuration (e.g. 'debug compile')
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- unnamed tasks log to parent task
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- in parallel, optionally one task always logging
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- Have Interfaces subproject that depends on no other project and defines interfaces in package xsbti. They are written in Java and cannot refer to Scala classes (compileOrder = JavaThenScala). These interfaces can be used to pass objects across ClassLoader boundaries.
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- launcher/main interface is not static (no system properties should be used past the static entry point)
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- simple, well-defined ClassLoaders
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- use Exceptions instead of Option/Either
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- every component gets its own subproject
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- can use any version of compiler/Scala that is source compatible with the compiler-interface component
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- Logger passed by implicit parameter
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- build xsbt using normal cross-build conventions
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- compiler: raw interface (no dependency analysis, but still in same jvm) or with dependency analysis
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- compiler: can specify scala-library.jar and scala-compiler.jar + version instead of retrieving the ClassLoader
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- minimal dependence on main xsbt logger from subcomponents: use thin interface for subcomponents
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Dependency Management
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- resolvers are completely defined in project definition (use Resolver.withDefaultResolvers)
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- configurations completely defined within project (use ModuleConfiguration.configurations)
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Launcher
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- see launch.specification
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- boot interface contains static final int version = N that main xsbt can use to check if it can be loaded by that version (a lower bound check)
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- main xsbt has static final int version = N that boot can use to check if it can load that version (a lower bound check) |