Warning when using maven with handlerbars as dependency

[davinkevin]

Hi,

I think there is a problem with the maven packaging of the handlebars because when I define the following pom.xml I have some WARNING in the maven output:

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
	<modelVersion>4.0.0</modelVersion>

	<groupId>com.example</groupId>
	<artifactId>demo</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<name>demo</name>

	<properties>
		<java.version>1.8</java.version>
	</properties>

	<dependencies>

    <dependency>
      <groupId>com.github.jknack</groupId>
      <artifactId>handlebars</artifactId>
      <version>4.1.2</version>
    </dependency>
    <dependency>
      <groupId>com.github.jknack</groupId>
      <artifactId>handlebars-helpers</artifactId>
      <version>4.1.2</version>
    </dependency>
	</dependencies>

</project>

When running mvn dependency:tree and any other commands, I have the WARNING you see in the log.

[INFO] Scanning for projects...
[INFO]
[INFO] --------------------------< com.example:demo >--------------------------
[INFO] Building demo 0.0.1-SNAPSHOT
[INFO] --------------------------------[ jar ]---------------------------------
[WARNING] The POM for com.github.jknack:handlebars:jar:4.1.2 is invalid, transitive dependencies (if any) will not be available, enable debug logging for more details
[WARNING] The POM for com.github.jknack:handlebars-helpers:jar:4.1.2 is invalid, transitive dependencies (if any) will not be available, enable debug logging for more details
[INFO]
[INFO] --- maven-dependency-plugin:2.8:tree (default-cli) @ demo ---
[INFO] com.example:demo:jar:0.0.1-SNAPSHOT
[INFO] +- com.github.jknack:handlebars:jar:4.1.2:compile
[INFO] \- com.github.jknack:handlebars-helpers:jar:4.1.2:compile
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  0.763 s
[INFO] Finished at: 2020-01-19T19:56:12+01:00
[INFO] ------------------------------------------------------------------------

If I run it in debug mode, I have the following output:

Apache Maven 3.6.3 (cecedd343002696d0abb50b32b541b8a6ba2883f)
Maven home: /usr/local/Cellar/maven/3.6.3/libexec
Java version: 11, vendor: Oracle Corporation, runtime: /Users/kevin/.jabba/jdk/adopt@1.11.28-0/Contents/Home
Default locale: fr_FR, platform encoding: UTF-8
OS name: "mac os x", version: "10.15.2", arch: "x86_64", family: "mac"
[DEBUG] Created new class realm maven.api
[DEBUG] Importing foreign packages into class realm maven.api
[DEBUG]   Imported: javax.annotation.* < plexus.core
[DEBUG]   Imported: javax.annotation.security.* < plexus.core
[DEBUG]   Imported: javax.enterprise.inject.* < plexus.core
[DEBUG]   Imported: javax.enterprise.util.* < plexus.core
[DEBUG]   Imported: javax.inject.* < plexus.core
[DEBUG]   Imported: org.apache.maven.* < plexus.core
[DEBUG]   Imported: org.apache.maven.artifact < plexus.core
[DEBUG]   Imported: org.apache.maven.classrealm < plexus.core
[DEBUG]   Imported: org.apache.maven.cli < plexus.core
[DEBUG]   Imported: org.apache.maven.configuration < plexus.core
[DEBUG]   Imported: org.apache.maven.exception < plexus.core
[DEBUG]   Imported: org.apache.maven.execution < plexus.core
[DEBUG]   Imported: org.apache.maven.execution.scope < plexus.core
[DEBUG]   Imported: org.apache.maven.lifecycle < plexus.core
[DEBUG]   Imported: org.apache.maven.model < plexus.core
[DEBUG]   Imported: org.apache.maven.monitor < plexus.core
[DEBUG]   Imported: org.apache.maven.plugin < plexus.core
[DEBUG]   Imported: org.apache.maven.profiles < plexus.core
[DEBUG]   Imported: org.apache.maven.project < plexus.core
[DEBUG]   Imported: org.apache.maven.reporting < plexus.core
[DEBUG]   Imported: org.apache.maven.repository < plexus.core
[DEBUG]   Imported: org.apache.maven.rtinfo < plexus.core
[DEBUG]   Imported: org.apache.maven.settings < plexus.core
[DEBUG]   Imported: org.apache.maven.toolchain < plexus.core
[DEBUG]   Imported: org.apache.maven.usability < plexus.core
[DEBUG]   Imported: org.apache.maven.wagon.* < plexus.core
[DEBUG]   Imported: org.apache.maven.wagon.authentication < plexus.core
[DEBUG]   Imported: org.apache.maven.wagon.authorization < plexus.core
[DEBUG]   Imported: org.apache.maven.wagon.events < plexus.core
[DEBUG]   Imported: org.apache.maven.wagon.observers < plexus.core
[DEBUG]   Imported: org.apache.maven.wagon.proxy < plexus.core
[DEBUG]   Imported: org.apache.maven.wagon.repository < plexus.core
[DEBUG]   Imported: org.apache.maven.wagon.resource < plexus.core
[DEBUG]   Imported: org.codehaus.classworlds < plexus.core
[DEBUG]   Imported: org.codehaus.plexus.* < plexus.core
[DEBUG]   Imported: org.codehaus.plexus.classworlds < plexus.core
[DEBUG]   Imported: org.codehaus.plexus.component < plexus.core
[DEBUG]   Imported: org.codehaus.plexus.configuration < plexus.core
[DEBUG]   Imported: org.codehaus.plexus.container < plexus.core
[DEBUG]   Imported: org.codehaus.plexus.context < plexus.core
[DEBUG]   Imported: org.codehaus.plexus.lifecycle < plexus.core
[DEBUG]   Imported: org.codehaus.plexus.logging < plexus.core
[DEBUG]   Imported: org.codehaus.plexus.personality < plexus.core
[DEBUG]   Imported: org.codehaus.plexus.util.xml.Xpp3Dom < plexus.core
[DEBUG]   Imported: org.codehaus.plexus.util.xml.pull.XmlPullParser < plexus.core
[DEBUG]   Imported: org.codehaus.plexus.util.xml.pull.XmlPullParserException < plexus.core
[DEBUG]   Imported: org.codehaus.plexus.util.xml.pull.XmlSerializer < plexus.core
[DEBUG]   Imported: org.eclipse.aether.* < plexus.core
[DEBUG]   Imported: org.eclipse.aether.artifact < plexus.core
[DEBUG]   Imported: org.eclipse.aether.collection < plexus.core
[DEBUG]   Imported: org.eclipse.aether.deployment < plexus.core
[DEBUG]   Imported: org.eclipse.aether.graph < plexus.core
[DEBUG]   Imported: org.eclipse.aether.impl < plexus.core
[DEBUG]   Imported: org.eclipse.aether.installation < plexus.core
[DEBUG]   Imported: org.eclipse.aether.internal.impl < plexus.core
[DEBUG]   Imported: org.eclipse.aether.metadata < plexus.core
[DEBUG]   Imported: org.eclipse.aether.repository < plexus.core
[DEBUG]   Imported: org.eclipse.aether.resolution < plexus.core
[DEBUG]   Imported: org.eclipse.aether.spi < plexus.core
[DEBUG]   Imported: org.eclipse.aether.transfer < plexus.core
[DEBUG]   Imported: org.eclipse.aether.version < plexus.core
[DEBUG]   Imported: org.fusesource.jansi.* < plexus.core
[DEBUG]   Imported: org.slf4j.* < plexus.core
[DEBUG]   Imported: org.slf4j.event.* < plexus.core
[DEBUG]   Imported: org.slf4j.helpers.* < plexus.core
[DEBUG]   Imported: org.slf4j.spi.* < plexus.core
[DEBUG] Populating class realm maven.api
[INFO] Error stacktraces are turned on.
[DEBUG] Message scheme: color
[DEBUG] Message styles: debug info warning error success failure strong mojo project
[DEBUG] Reading global settings from /usr/local/Cellar/maven/3.6.3/libexec/conf/settings.xml
[DEBUG] Reading user settings from /Users/kevin/.m2/settings.xml
[DEBUG] Reading global toolchains from /usr/local/Cellar/maven/3.6.3/libexec/conf/toolchains.xml
[DEBUG] Reading user toolchains from /Users/kevin/.m2/toolchains.xml
[DEBUG] Using local repository at /Users/kevin/.m2/repository
[DEBUG] Using manager EnhancedLocalRepositoryManager with priority 10.0 for /Users/kevin/.m2/repository
[INFO] Scanning for projects...
[DEBUG] Extension realms for project com.example:demo:jar:0.0.1-SNAPSHOT: (none)
[DEBUG] Looking up lifecycle mappings for packaging jar from ClassRealm[plexus.core, parent: null]
[DEBUG] Resolving plugin prefix dependency from [org.apache.maven.plugins, org.codehaus.mojo]
[DEBUG] Resolved plugin prefix dependency to org.apache.maven.plugins:maven-dependency-plugin from POM com.example:demo:jar:0.0.1-SNAPSHOT
[DEBUG] === REACTOR BUILD PLAN ================================================
[DEBUG] Project: com.example:demo:jar:0.0.1-SNAPSHOT
[DEBUG] Tasks:   [dependency:tree]
[DEBUG] Style:   Regular
[DEBUG] =======================================================================
[INFO]
[INFO] --------------------------< com.example:demo >--------------------------
[INFO] Building demo 0.0.1-SNAPSHOT
[INFO] --------------------------------[ jar ]---------------------------------
[DEBUG] Resolving plugin prefix dependency from [org.apache.maven.plugins, org.codehaus.mojo]
[DEBUG] Resolved plugin prefix dependency to org.apache.maven.plugins:maven-dependency-plugin from POM com.example:demo:jar:0.0.1-SNAPSHOT
[DEBUG] Lifecycle default -> [validate, initialize, generate-sources, process-sources, generate-resources, process-resources, compile, process-classes, generate-test-sources, process-test-sources, generate-test-resources, process-test-resources, test-compile, process-test-classes, test, prepare-package, package, pre-integration-test, integration-test, post-integration-test, verify, install, deploy]
[DEBUG] Lifecycle clean -> [pre-clean, clean, post-clean]
[DEBUG] Lifecycle site -> [pre-site, site, post-site, site-deploy]
[DEBUG] === PROJECT BUILD PLAN ================================================
[DEBUG] Project:       com.example:demo:0.0.1-SNAPSHOT
[DEBUG] Dependencies (collect): []
[DEBUG] Dependencies (resolve): [test]
[DEBUG] Repositories (dependencies): [central (https://repo.maven.apache.org/maven2, default, releases)]
[DEBUG] Repositories (plugins)     : [central (https://repo.maven.apache.org/maven2, default, releases)]
[DEBUG] -----------------------------------------------------------------------
[DEBUG] Goal:          org.apache.maven.plugins:maven-dependency-plugin:2.8:tree (default-cli)
[DEBUG] Style:         Regular
[DEBUG] Configuration: <?xml version="1.0" encoding="UTF-8"?>
<configuration>
  <appendOutput default-value="false">${appendOutput}</appendOutput>
  <excludes>${excludes}</excludes>
  <includes>${includes}</includes>
  <localRepository default-value="${localRepository}"/>
  <output>${output}</output>
  <outputFile>${outputFile}</outputFile>
  <outputType default-value="text">${outputType}</outputType>
  <scope>${scope}</scope>
  <skip default-value="false">${skip}</skip>
  <tokens default-value="standard">${tokens}</tokens>
  <verbose default-value="false">${verbose}</verbose>
  <project default-value="${project}"/>
</configuration>
[DEBUG] =======================================================================
[WARNING] The POM for com.github.jknack:handlebars:jar:4.1.2 is invalid, transitive dependencies (if any) will not be available: 1 problem was encountered while building the effective model for com.github.jknack:handlebars:4.1.2
[ERROR] Invalid packaging for parent POM com.github.jknack:handlebars.java:4.1.2, must be "pom" but is "jar" @ com.github.jknack:handlebars.java:4.1.2

[WARNING] The POM for com.github.jknack:handlebars-helpers:jar:4.1.2 is invalid, transitive dependencies (if any) will not be available: 7 problems were encountered while building the effective model for com.github.jknack:handlebars-helpers:4.1.2
[ERROR] Invalid packaging for parent POM com.github.jknack:handlebars.java:4.1.2, must be "pom" but is "jar" @
[ERROR] 'dependencies.dependency.version' for org.apache.commons:commons-lang3:jar is missing. @
[ERROR] 'dependencies.dependency.version' for javax.servlet:servlet-api:jar is missing. @
[ERROR] 'dependencies.dependency.version' for ch.qos.logback:logback-classic:jar is missing. @
[ERROR] 'dependencies.dependency.version' for junit:junit:jar is missing. @
[ERROR] 'dependencies.dependency.version' for org.easymock:easymock:jar is missing. @
[ERROR] 'dependencies.dependency.version' for org.yaml:snakeyaml:jar is missing. @

[DEBUG] Dependency collection stats: {ConflictMarker.analyzeTime=526194, ConflictMarker.markTime=193962, ConflictMarker.nodeCount=3, ConflictIdSorter.graphTime=236212, ConflictIdSorter.topsortTime=184976, ConflictIdSorter.conflictIdCount=2, ConflictIdSorter.conflictIdCycleCount=0, ConflictResolver.totalTime=1572249, ConflictResolver.conflictItemCount=2, DefaultDependencyCollector.collectTime=15206819, DefaultDependencyCollector.transformTime=4438557}
[DEBUG] com.example:demo:jar:0.0.1-SNAPSHOT
[DEBUG]    com.github.jknack:handlebars:jar:4.1.2:compile
[DEBUG]    com.github.jknack:handlebars-helpers:jar:4.1.2:compile
[INFO]
[INFO] --- maven-dependency-plugin:2.8:tree (default-cli) @ demo ---
[DEBUG] Dependency collection stats: {ConflictMarker.analyzeTime=673075, ConflictMarker.markTime=268544, ConflictMarker.nodeCount=297, ConflictIdSorter.graphTime=236620, ConflictIdSorter.topsortTime=43042, ConflictIdSorter.conflictIdCount=63, ConflictIdSorter.conflictIdCycleCount=0, ConflictResolver.totalTime=3527818, ConflictResolver.conflictItemCount=167, DefaultDependencyCollector.collectTime=222777465, DefaultDependencyCollector.transformTime=4815242}
[DEBUG] org.apache.maven.plugins:maven-dependency-plugin:jar:2.8
[DEBUG]    org.apache.maven:maven-artifact:jar:2.0.9:compile
[DEBUG]    org.apache.maven:maven-plugin-api:jar:2.0.9:compile
[DEBUG]    org.apache.maven:maven-project:jar:2.0.9:compile
[DEBUG]       org.apache.maven:maven-settings:jar:2.0.9:compile
[DEBUG]       org.apache.maven:maven-profile:jar:2.0.9:compile
[DEBUG]       org.apache.maven:maven-plugin-registry:jar:2.0.9:compile
[DEBUG]    org.apache.maven:maven-model:jar:2.0.9:compile
[DEBUG]    org.apache.maven:maven-core:jar:2.0.9:compile
[DEBUG]       org.apache.maven:maven-plugin-parameter-documenter:jar:2.0.9:compile
[DEBUG]       org.apache.maven:maven-error-diagnostics:jar:2.0.9:compile
[DEBUG]       commons-cli:commons-cli:jar:1.0:compile
[DEBUG]       org.apache.maven:maven-plugin-descriptor:jar:2.0.9:compile
[DEBUG]       org.codehaus.plexus:plexus-interactivity-api:jar:1.0-alpha-4:compile
[DEBUG]       org.apache.maven:maven-monitor:jar:2.0.9:compile
[DEBUG]    org.apache.maven:maven-artifact-manager:jar:2.0.9:compile
[DEBUG]    org.apache.maven:maven-repository-metadata:jar:2.0.9:compile
[DEBUG]    org.apache.maven.reporting:maven-reporting-api:jar:3.0:compile
[DEBUG]    org.apache.maven.reporting:maven-reporting-impl:jar:2.0.5:compile
[DEBUG]       org.apache.maven.doxia:doxia-core:jar:1.0:compile
[DEBUG]       org.apache.maven.shared:maven-doxia-tools:jar:1.0.2:compile
[DEBUG]          commons-io:commons-io:jar:1.4:compile
[DEBUG]       commons-validator:commons-validator:jar:1.2.0:compile
[DEBUG]          commons-beanutils:commons-beanutils:jar:1.7.0:compile
[DEBUG]          commons-digester:commons-digester:jar:1.6:compile
[DEBUG]          commons-logging:commons-logging:jar:1.0.4:compile
[DEBUG]          oro:oro:jar:2.0.8:compile
[DEBUG]          xml-apis:xml-apis:jar:1.0.b2:compile
[DEBUG]    org.apache.maven.doxia:doxia-sink-api:jar:1.0:compile
[DEBUG]    org.apache.maven.doxia:doxia-site-renderer:jar:1.0:compile
[DEBUG]       org.codehaus.plexus:plexus-i18n:jar:1.0-beta-7:compile
[DEBUG]       org.codehaus.plexus:plexus-velocity:jar:1.1.7:compile
[DEBUG]       org.apache.velocity:velocity:jar:1.5:compile
[DEBUG]       org.apache.maven.doxia:doxia-decoration-model:jar:1.0:compile
[DEBUG]       org.apache.maven.doxia:doxia-module-apt:jar:1.0:compile
[DEBUG]       org.apache.maven.doxia:doxia-module-fml:jar:1.0:compile
[DEBUG]       org.apache.maven.doxia:doxia-module-xdoc:jar:1.0:compile
[DEBUG]       org.apache.maven.doxia:doxia-module-xhtml:jar:1.0:compile
[DEBUG]    org.codehaus.plexus:plexus-archiver:jar:2.3:compile
[DEBUG]    org.codehaus.plexus:plexus-utils:jar:3.0.9:compile
[DEBUG]    org.apache.maven.shared:file-management:jar:1.2.1:compile
[DEBUG]       org.apache.maven.shared:maven-shared-io:jar:1.1:compile
[DEBUG]          org.apache.maven.wagon:wagon-provider-api:jar:1.0-alpha-6:compile
[DEBUG]    org.codehaus.plexus:plexus-container-default:jar:1.0-alpha-9-stable-1:compile
[DEBUG]       junit:junit:jar:3.8.1:compile
[DEBUG]    org.codehaus.plexus:plexus-io:jar:2.0.6:compile
[DEBUG]    org.apache.maven.shared:maven-dependency-analyzer:jar:1.4:compile
[DEBUG]       asm:asm:jar:3.3.1:compile
[DEBUG]       org.codehaus.plexus:plexus-component-annotations:jar:1.5.5:compile (version managed from default)
[DEBUG]    org.apache.maven.shared:maven-dependency-tree:jar:2.1:compile
[DEBUG]       org.eclipse.aether:aether-util:jar:0.9.0.M2:compile
[DEBUG]    org.apache.maven.shared:maven-common-artifact-filters:jar:1.4:compile
[DEBUG]    org.apache.maven.shared:maven-invoker:jar:2.0.11:compile
[DEBUG]    commons-lang:commons-lang:jar:2.6:compile
[DEBUG]    commons-collections:commons-collections:jar:3.2.1:compile
[DEBUG]    classworlds:classworlds:jar:1.1:compile
[DEBUG] Created new class realm plugin>org.apache.maven.plugins:maven-dependency-plugin:2.8
[DEBUG] Importing foreign packages into class realm plugin>org.apache.maven.plugins:maven-dependency-plugin:2.8
[DEBUG]   Imported:  < maven.api
[DEBUG] Populating class realm plugin>org.apache.maven.plugins:maven-dependency-plugin:2.8
[DEBUG]   Included: org.apache.maven.plugins:maven-dependency-plugin:jar:2.8
[DEBUG]   Included: commons-cli:commons-cli:jar:1.0
[DEBUG]   Included: org.codehaus.plexus:plexus-interactivity-api:jar:1.0-alpha-4
[DEBUG]   Included: org.apache.maven.reporting:maven-reporting-api:jar:3.0
[DEBUG]   Included: org.apache.maven.reporting:maven-reporting-impl:jar:2.0.5
[DEBUG]   Included: org.apache.maven.doxia:doxia-core:jar:1.0
[DEBUG]   Included: org.apache.maven.shared:maven-doxia-tools:jar:1.0.2
[DEBUG]   Included: commons-io:commons-io:jar:1.4
[DEBUG]   Included: commons-validator:commons-validator:jar:1.2.0
[DEBUG]   Included: commons-beanutils:commons-beanutils:jar:1.7.0
[DEBUG]   Included: commons-digester:commons-digester:jar:1.6
[DEBUG]   Included: commons-logging:commons-logging:jar:1.0.4
[DEBUG]   Included: oro:oro:jar:2.0.8
[DEBUG]   Included: xml-apis:xml-apis:jar:1.0.b2
[DEBUG]   Included: org.apache.maven.doxia:doxia-sink-api:jar:1.0
[DEBUG]   Included: org.apache.maven.doxia:doxia-site-renderer:jar:1.0
[DEBUG]   Included: org.codehaus.plexus:plexus-i18n:jar:1.0-beta-7
[DEBUG]   Included: org.codehaus.plexus:plexus-velocity:jar:1.1.7
[DEBUG]   Included: org.apache.velocity:velocity:jar:1.5
[DEBUG]   Included: org.apache.maven.doxia:doxia-decoration-model:jar:1.0
[DEBUG]   Included: org.apache.maven.doxia:doxia-module-apt:jar:1.0
[DEBUG]   Included: org.apache.maven.doxia:doxia-module-fml:jar:1.0
[DEBUG]   Included: org.apache.maven.doxia:doxia-module-xdoc:jar:1.0
[DEBUG]   Included: org.apache.maven.doxia:doxia-module-xhtml:jar:1.0
[DEBUG]   Included: org.codehaus.plexus:plexus-archiver:jar:2.3
[DEBUG]   Included: org.codehaus.plexus:plexus-utils:jar:3.0.9
[DEBUG]   Included: org.apache.maven.shared:file-management:jar:1.2.1
[DEBUG]   Included: org.apache.maven.shared:maven-shared-io:jar:1.1
[DEBUG]   Included: junit:junit:jar:3.8.1
[DEBUG]   Included: org.codehaus.plexus:plexus-io:jar:2.0.6
[DEBUG]   Included: org.apache.maven.shared:maven-dependency-analyzer:jar:1.4
[DEBUG]   Included: asm:asm:jar:3.3.1
[DEBUG]   Included: org.codehaus.plexus:plexus-component-annotations:jar:1.5.5
[DEBUG]   Included: org.apache.maven.shared:maven-dependency-tree:jar:2.1
[DEBUG]   Included: org.eclipse.aether:aether-util:jar:0.9.0.M2
[DEBUG]   Included: org.apache.maven.shared:maven-common-artifact-filters:jar:1.4
[DEBUG]   Included: org.apache.maven.shared:maven-invoker:jar:2.0.11
[DEBUG]   Included: commons-lang:commons-lang:jar:2.6
[DEBUG]   Included: commons-collections:commons-collections:jar:3.2.1
[DEBUG] Configuring mojo org.apache.maven.plugins:maven-dependency-plugin:2.8:tree from plugin realm ClassRealm[plugin>org.apache.maven.plugins:maven-dependency-plugin:2.8, parent: jdk.internal.loader.ClassLoaders$AppClassLoader@799f7e29]
[DEBUG] Configuring mojo 'org.apache.maven.plugins:maven-dependency-plugin:2.8:tree' with basic configurator -->
[DEBUG]   (f) appendOutput = false
[DEBUG]   (f) localRepository =       id: local
      url: file:///Users/kevin/.m2/repository/
   layout: default
snapshots: [enabled => true, update => always]
 releases: [enabled => true, update => always]

[DEBUG]   (f) outputType = text
[DEBUG]   (s) skip = false
[DEBUG]   (f) tokens = standard
[DEBUG]   (f) verbose = false
[DEBUG]   (f) project = MavenProject: com.example:demo:0.0.1-SNAPSHOT @ /Users/kevin/Desktop/demo/pom.xml
[DEBUG] -- end configuration --
[DEBUG] building maven31 dependency graph for com.example:demo:jar:0.0.1-SNAPSHOT
[DEBUG] Dependency collection stats: {ConflictMarker.analyzeTime=87728, ConflictMarker.markTime=76349, ConflictMarker.nodeCount=3, ConflictIdSorter.graphTime=8382, ConflictIdSorter.topsortTime=7131, ConflictIdSorter.conflictIdCount=2, ConflictIdSorter.conflictIdCycleCount=0, ConflictResolver.totalTime=152817, ConflictResolver.conflictItemCount=2, DefaultDependencyCollector.collectTime=175235, DefaultDependencyCollector.transformTime=346976}
[DEBUG] com.example:demo:jar:0.0.1-SNAPSHOT
[DEBUG]    com.github.jknack:handlebars:jar:4.1.2:compile
[DEBUG]    com.github.jknack:handlebars-helpers:jar:4.1.2:compile
[INFO] com.example:demo:jar:0.0.1-SNAPSHOT
[INFO] +- com.github.jknack:handlebars:jar:4.1.2:compile
[INFO] \- com.github.jknack:handlebars-helpers:jar:4.1.2:compile
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  0.692 s
[INFO] Finished at: 2020-01-19T19:58:11+01:00
[INFO] ------------------------------------------------------------------------

The interesting part is here:

[WARNING] The POM for com.github.jknack:handlebars:jar:4.1.2 is invalid, transitive dependencies (if any) will not be available: 1 problem was encountered while building the effective model for com.github.jknack:handlebars:4.1.2
[ERROR] Invalid packaging for parent POM com.github.jknack:handlebars.java:4.1.2, must be "pom" but is "jar" @ com.github.jknack:handlebars.java:4.1.2

[WARNING] The POM for com.github.jknack:handlebars-helpers:jar:4.1.2 is invalid, transitive dependencies (if any) will not be available: 7 problems were encountered while building the effective model for com.github.jknack:handlebars-helpers:4.1.2
[ERROR] Invalid packaging for parent POM com.github.jknack:handlebars.java:4.1.2, must be "pom" but is "jar" @
[ERROR] 'dependencies.dependency.version' for org.apache.commons:commons-lang3:jar is missing. @
[ERROR] 'dependencies.dependency.version' for javax.servlet:servlet-api:jar is missing. @
[ERROR] 'dependencies.dependency.version' for ch.qos.logback:logback-classic:jar is missing. @
[ERROR] 'dependencies.dependency.version' for junit:junit:jar is missing. @
[ERROR] 'dependencies.dependency.version' for org.easymock:easymock:jar is missing. @
[ERROR] 'dependencies.dependency.version' for org.yaml:snakeyaml:jar is missing. @

This is very annoying to have this kind of WARNING or ERROR in every project with handlebars as a dependencies or transitive dependencies (in my case, with wiremock).

Thanks for your help

[jknack]

Still happening? Make no sense.

[lorenzovalente]

[sclorng]

This is the content of the 4.3.0 pom from the mvn repo

<?xml version="1.0" encoding="UTF-8"?>
<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns="http://maven.apache.org/POM/4.0.0"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.github.jknack</groupId>
  <artifactId>handlebars.java</artifactId>
  <version>4.3.0</version>
  <dependencies>
    <dependency>
      <groupId>com.github.jknack.handlebars.java</groupId>
      <artifactId>handlebars</artifactId>
      <version>4.3.0</version>
    </dependency>
    <dependency>
      <groupId>com.github.jknack.handlebars.java</groupId>
      <artifactId>handlebars-caffeine</artifactId>
      <version>4.3.0</version>
    </dependency>
    <dependency>
      <groupId>com.github.jknack.handlebars.java</groupId>
      <artifactId>handlebars-guava-cache</artifactId>
      <version>4.3.0</version>
    </dependency>
    <dependency>
      <groupId>com.github.jknack.handlebars.java</groupId>
      <artifactId>handlebars-helpers</artifactId>
      <version>4.3.0</version>
    </dependency>
    <dependency>
      <groupId>com.github.jknack.handlebars.java</groupId>
      <artifactId>handlebars-humanize</artifactId>
      <version>4.3.0</version>
    </dependency>
    <dependency>
      <groupId>com.github.jknack.handlebars.java</groupId>
      <artifactId>handlebars-jackson2</artifactId>
      <version>4.3.0</version>
    </dependency>
    <dependency>
      <groupId>com.github.jknack.handlebars.java</groupId>
      <artifactId>handlebars-maven-plugin</artifactId>
      <version>4.3.0</version>
      <type>maven-plugin</type>
    </dependency>
    <dependency>
      <groupId>com.github.jknack.handlebars.java</groupId>
      <artifactId>handlebars-maven-plugin-tests</artifactId>
      <version>4.3.0</version>
      <type>war</type>
    </dependency>
    <dependency>
      <groupId>com.github.jknack.handlebars.java</groupId>
      <artifactId>handlebars-proto</artifactId>
      <version>4.3.0</version>
    </dependency>
    <dependency>
      <groupId>com.github.jknack.handlebars.java</groupId>
      <artifactId>handlebars-springmvc</artifactId>
      <version>4.3.0</version>
    </dependency>
  </dependencies>
</project>

The node <packaging>pom</packaging> is being removed somewhere

[michaelboyles]

@sclorng Not sure where you got that from, but it looks fine in Maven Central.

https://repo1.maven.org/maven2/com/github/jknack/handlebars.java/4.3.0/handlebars.java-4.3.0.pom

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.github.jknack</groupId>
<artifactId>handlebars.java</artifactId>
<version>4.3.0</version>
<packaging>pom</packaging>

[romulus-ai]

Having the same problem right now, after it worked already for around half a year.

Errors occurred while building effective model from /Users/thomasbruckmann/.gradle/caches/modules-2/files-2.1/com.github.jknack/handlebars/4.3.0/f26ce03681940de02a1776b6982fe8f60252b5cd/handlebars-4.3.0.pom: Invalid packaging for parent POM com.github.jknack:handlebars.java:4.3.0, must be "pom" but is "jar" in com.github.jknack:handlebars.java:4.3.0

Handlebars is integrated via

testImplementation("org.springframework.cloud:spring-cloud-starter-contract-stub-runner:4.1.4")

Using gradle 8.7, does someone has a solution for that?

[jjjasper]

I face the same issue (with version 4.3.1).

It seems the pom is also available here: https://jitpack.io/com/github/jknack/handlebars.java/4.3.1/handlebars.java-4.3.1.pom but it has no packaging element (meaning it defaults to jar)
Version on https://repo1.maven.org/maven2/com/github/jknack/handlebars.java/4.3.1/handlebars.java-4.3.1.pom looks okay.