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Readme

Requirements

Building Tool: SBT

Coding Style Check

sbt scalastyle

Show Dependency Tree

sbt dependencyTree > tree.log

build and package

Build thin jar

# cd to project root dir

sbt package

Build fat jar(with all dependencies) for Spark Application

# on Linux, MACOS
sbt "-DprovidedDeps=true" clean assembly

# on Windows
set JAVA_TOOL_OPTIONS='-Dfile.encoding=UTF8'
sbt package

Package Distribution

# on Linux, Mac
sbt "-DprovidedDeps=true"  universal:packageBin

# on Windows
set JAVA_TOOL_OPTIONS='-Dfile.encoding=UTF8'
sbt "-DprovidedDeps=true"  universal:packageBin

# When packaging finished, you can find distribution here:
target/universal/waterdrop-<version>.zip

If you want to check what files/directories will be included distribution package

sbt "-DprovidedDeps=true" stage
ls ./target/universal/stage/

check sbt native packager universal plugin for more details.

FAQs

  1. Intellij IDEA doesn't recognize antlr4 generated source ?

File -> Project Structure -> Modules, in Sources Tab,

select module waterdrop-core, then mark directory target/scala-2.11/src_managed/main/antlr4/ as Sources Root(blue icon)

If you don't have target/scala-2.11/src_managed/main/antlr4/ directory, you can create this directory, or execute sbt package in command line first.

  1. OutOfMemoryError occurs while compilation ?
# Linux, Mac
export JAVA_OPTS=-Xmx4G
sbt ...

# Windows
set JAVA_OPTS=-Xmx4G
sbt ...
  1. How to auto-format code according to the coding style of this project in Intellij IDEA ？

The coding style is defined in scalastyle-config.xml in this project root dir. When you are using Intellij IDEA, you can install scalafmt plugin to auto-format code style. Then you should check "Format on file save" in scalafmt configuration(in preferences or settings).