Post

Maven

Posted Updated
By komidawi
1 min read
Maven

CLI Arguments list

Install dependency manually

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mvn install:install-file -Dfile=./lib/ojdbc8-12.2.0.1.jar -DgroupId=com.oracle -DartifactId=ojdbc8 -Dversion=12.2.0.1 -Dpackaging=jar

Effective POM

View all pom.xml details by:

  • IntelliJ: PPM on pom.xml -> Show effective POM!
  • or mvn help:effective-pom

Maven settings

For standalone Maven:

  1. ${user.home}/.m2/settings.xml
  2. ${maven.home}/conf/settings.xml

For IntelliJ bundled Maven:

  1. Execute mvn --version and find Maven home location

Verify settings are properly loaded

mvn help:effective-settings

Find location of settings.xml

Add --debug(-X) to command.

Versioning templates

Define maven to increase performance:

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maven() {
  mvn -T1C "$@"
}

Define release version templates:

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# Assuming current development version is `X.Y.Z-SNAPSHOT`
RELEASE_MAJOR_TEMPLATE='${parsedVersion.nextMajorVersion}.0.0'
RELEASE_MINOR_TEMPLATE='${parsedVersion.majorVersion}.${parsedVersion.nextMinorVersion}.0'
RELEASE_PATCH_TEMPLATE='${parsedVersion.majorVersion}.${parsedVersion.minorVersion}.${parsedVersion.incrementalVersion}'
NEXT_SNAPSHOT_TEMPLATE='${parsedVersion.majorVersion}.${parsedVersion.minorVersion}.${parsedVersion.nextIncrementalVersion}-SNAPSHOT'

Evaluate version number using given template:

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mvn_evaluate_version() {
  maven --non-recursive --quiet -DforceStdout build-helper:parse-version help:evaluate
}

evaluate_version() {
  echo "$1" | mvn_evaluate_version
}

Set given version in pom.xml files:

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mvn_set_version() {
  maven versions:set -DnewVersion="$1" -DgenerateBackupPoms=false -DprocessAllModules
}

Remove -SNAPSHOT suffix

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mvn versions:set -DremoveSnapshot

Batch Mode

  • Use --batch-mode or -B
  • Maven will never stop to accept input from the user. Instead, it will use sensible default values when it requires input.
  • Causes Maven not to display Progress: 125/150kB style lines when running
    • Alternate way to disable it is --no-transfer-progress
  • Disables output coloring (by default maven colorizes the output)
  • Will fail if prompted (e.g. mvn versions:set)

Optimization

  • -T 1C
    • Use 1 Thread per Core
  • -Dmaven.javadoc.skip=true
  • -XX:-TieredCompilation -XX:TieredStopAtLevel=1
    • JVM setup for short-lived processes
  • --offline (-o)
    • Skips looking for snapshot updates
  • Tests
    • -DskipTests
    • -Dmaven.test.skip
    • -Dparallel=all -DperCoreThreadCount=true
  • Use Maven Daemon
    • mvnd
  • Build only specified modules
    • -pl $moduleName -am
tools, build-tools
maven