Task Reference 🔗

Deder's built-in tasks are grouped into categories that broadly match the CLI (deder tasks). Most tasks can be invoked with deder exec -t <task> -m <module>.

Note: A small number of public tasks have no category assigned in source and therefore appear under Other in deder tasks output. They are collected in the Other section at the bottom of this page.

Caching: whether a task is cached (skipped when inputs are unchanged) or always runs is documented in Task caching.

Build 🔗

These tasks compile source code and manage the compile output directory.

Configuration 🔗

Configuration tasks read values from deder.pkl and are the building blocks for higher-level tasks. They are useful in deder plan output and can be inspected directly.

Dependencies 🔗

Dependency tasks resolve and fetch Maven/Ivy coordinates declared in deder.pkl.

Verification 🔗

Test filtering examples:

deder exec -t test -m mymodule-test                 # all tests in module
deder exec -t test -m mymodule-test com.example.%   # suites matching prefix
deder exec -t test -m mymodule-test com.example.FooSuite#test1  # single test

Run 🔗

Examples:

deder exec -t run -m myapp
deder exec -t run -m myapp --watch
deder exec -t runMain -m myapp com.example.AltMain
deder exec -t runMvnApp -m myapp fmt      # format with Scalafmt
deder exec -t runMvnApp -m myapp fmtCheck # check formatting

Publishing and Bundling 🔗

Publishing tasks build JARs, assemble uber-JARs, and publish Maven artifacts.

Examples:

deder exec -t assembly -m myapp
java -jar .deder/out/myapp/assembly/out.jar

deder exec -t publishLocal -m mylib
deder exec -t publish -m mylib

For jar shading (assembly only), set shadeRulesFile on the module in deder.pkl to point to a jarjar rules file.

REPL 🔗

deder exec -t repl -m mymodule

Scala.js 🔗

All tasks in this section apply to modules of type SCALA_JS or SCALA_JS_TEST.

deder exec -t fastLinkJs -m myjsmodule
deder exec -t runJs -m myjsmodule
deder exec -t test -m myjsmodule-test

Scala Native 🔗

All tasks in this section apply to modules of type SCALA_NATIVE or SCALA_NATIVE_TEST.

Note: fastNativeLink, fullNativeLink, and runNative have no category in source and appear under Other in deder tasks output; they are listed in the Other section below.

deder exec -t nativeLink -m mynativemodule       # mode from config
deder exec -t test -m mynativemodule-test

GraalVM 🔗

GraalVM tasks apply to JAVA and SCALA modules that have a graalvm { } block in deder.pkl.

deder exec -t graalvmNativeImage -m myapp
.deder/out/myapp/graalvmNativeImage/native-executable

Add a graalvm { } block to the module in deder.pkl with at minimum graalvmHome (or set the $GRAALVM_HOME environment variable) to enable these tasks.

Other 🔗

These tasks have no category assigned in source and therefore appear under Other in deder tasks output.