mirror of https://github.com/sbt/sbt.git
118 lines
4.9 KiB
Markdown
118 lines
4.9 KiB
Markdown
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### Fixes with compatibility implications
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- The `.value` method is deprecated for input tasks. Calling `.value` on an input key returns an `InputTask[A]`,
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which is completely unintuitive and often results in a bug. In most cases `.evaluated` should be called,
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which returns `A` by evaluating the task.
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Just in case `InputTask[A]` is needed, `.inputTaskValue` method is now provided. [#2709][2709] by [@eed3si9n][@eed3si9n]
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- Deprecate the old symbolic operators, to be removed in sbt 1.0. See below for more details.
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- sbt 0.13.13 renames the early command `--<command>` that was added in 0.13.1 to `early(<command>)`. This fixes the regression [#1041][1041]. For backward compatibility `--error`, `--warn`, `--info`, and `--debug` will continue to function during the 0.13 series, but it is strongly encouraged to migrate to the single hyphen options: `-error`, `-warn`, `-info`, and `-debug`. [#2742][2742] by [@eed3si9n][@eed3si9n]
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### Improvements
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- Add the ability to call `aggregateProjects(..)` for the current project inside a build sbt file. [#2682][2682] by [@xuwei-k][@xuwei-k]
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### Bug fixes
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- Fix key selection for build level keys. sbt wrongly reported some keys as ambiguous. [#2707][2707]/[#2708][2708] by [@Duhemm][@Duhemm]
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- Support wildcard exclusions in POMs [#1431][1431]/[sbt/ivy#22][sbt-ivy-22]/[#2731][2731] by [@jtgrabowski][@jtgrabowski]
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- Fix forked tests being reported as successful when the test harness fails. [#2442][2442]/[#2722][2722]/[#2730][2730] by [@eed3si9n][@eed3si9n]/[@dwijnand][@dwijnand]
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### new command and templateResolvers
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sbt 0.13.13 adds a `new` command, which helps create new build definitions.
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The `new` command is extensible via a mechanism called the template resolver,
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which evaluates the arguments passed to the command to find and run a template.
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As a reference implementation [Giter8][g8] is provided. For instance:
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sbt new eed3si9n/hello.g8
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will run [eed3si9n/hello.g8][] using Giter8.
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[#2705][2705] by [@eed3si9n][@eed3si9n]
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### Synthetic subprojects
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sbt 0.13.13 adds support for `AutoPlugin`s to define subprojects programmatically,
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by overriding the `extraProjects` method:
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import sbt._, Keys._
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object ExtraProjectsPlugin extends AutoPlugin {
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override def extraProjects: Seq[Project] =
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List("foo", "bar", "baz") map generateProject
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def generateProject(id: String): Project =
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Project(id, file(id)).
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settings(
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name := id
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)
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}
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In addition, subprojects may be derived from an existing subproject
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by overriding `derivedProjects`:
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import sbt._, Keys._
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object DerivedProjectsPlugin extends AutoPlugin {
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// Enable this plugin by default
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override def requires: Plugins = sbt.plugins.CorePlugin
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override def trigger = allRequirements
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override def derivedProjects(proj: ProjectDefinition[_]): Seq[Project] =
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// Make sure to exclude project extras to avoid recursive generation
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if (proj.projectOrigin != ProjectOrigin.DerivedProject) {
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val id = proj.id + "1"
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Seq(
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Project(id, file(id)).
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enablePlugins(DatabasePlugin)
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)
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}
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else Nil
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}
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[#2532][2532]/[#2717][2717]/[#2738][2738] by [@eed3si9n][@eed3si9n]
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### Deprecate old operators
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The no-longer-documented operators `<<=`, `<+=`, and `<++=` are deprecated,
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and will be removed in sbt 1.0.
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For `<<=`, the suggested migration would be to use either `:=` or `~=` operators.
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The RHS of `<<=` takes an `Initialize[_]` expression, which can be converted to `:=` style
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by wrapping the expression in parenthesis, and calling `.value` at the end.
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For example:
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key := (key.dependsOn(compile in Test)).value
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For `<+=` and `<++=`, use `+= { x.value }` and `++= { x.value }`.
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[#2716][2716] by [@eed3si9n][@eed3si9n]
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[g8]: http://www.foundweekends.org/giter8/
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[eed3si9n/hello.g8]: https://github.com/eed3si9n/hello.g8
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[1041]: https://github.com/sbt/sbt/issues/1041
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[1431]: https://github.com/sbt/sbt/issues/1431
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[2442]: https://github.com/sbt/sbt/issues/2442
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[2532]: https://github.com/sbt/sbt/issues/2532
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[2705]: https://github.com/sbt/sbt/pull/2705
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[2682]: https://github.com/sbt/sbt/pull/2682
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[2707]: https://github.com/sbt/sbt/issues/2707
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[2708]: https://github.com/sbt/sbt/issues/2708
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[2709]: https://github.com/sbt/sbt/pull/2709
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[2716]: https://github.com/sbt/sbt/pull/2716
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[2717]: https://github.com/sbt/sbt/pull/2717
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[2722]: https://github.com/sbt/sbt/issues/2722
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[2730]: https://github.com/sbt/sbt/pull/2730
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[2731]: https://github.com/sbt/sbt/pull/2731
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[2738]: https://github.com/sbt/sbt/issues/2738
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[2742]: https://github.com/sbt/sbt/pull/2742
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[sbt-ivy-22]: https://github.com/sbt/ivy/pull/22
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[@eed3si9n]: https://github.com/eed3si9n
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[@dwijnand]: https://github.com/dwijnand
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[@Duhemm]: https://github.com/Duhemm
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[@xuwei-k]: https://github.com/xuwei-k
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[@jtgrabowski]: https://github.com/jtgrabowski
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