Maven Unable to Find AEM Archetype - maven

Question

I've been starting at this problem for way to long... Im working through the Adobe wknd project and I can't get pass this command and most of the work is built off of it
mvn archetype:generate \
-DarchetypeGroupId=com.adobe.granite.archetypes \
-DarchetypeArtifactId=aem-project-archetype \
-DarchetypeVersion=18
I've tried it on the VPN and off, with all possible proxy configs and still getting the same error of
Failed to execute goal org.apache.maven.plugins:maven-archetype-plugin:3.1.0:generate (default-cli) on project standalone-pom: The desired archetype does not exist (com.adobe.granite.archetypes:aem-project-archetype:18)
Deleting and reinstalling multiple times. Different networks and proxy configs as well Mac OS.
mvn -v returns
Maven home: /Users/dmills/Applications/apache-maven-3.6.1
Java version: 1.8.0_212, vendor: Oracle Corporation, runtime: /Library/Java/JavaVirtualMachines/jdk1.8.0_212.jdk/Contents/Home/jre
Default locale: en_US, platform encoding: UTF-8
OS name: "mac os x", version: "10.14.5", arch: "x86_64", family: "mac"
Get this error
Failed to execute goal org.apache.maven.plugins:maven-archetype-plugin:3.1.0:generate (default-cli) on project standalone-pom: The desired archetype does not exist (com.adobe.granite.archetypes:aem-project-archetype:18)
Build is failing and I don't know where to go now

Answer 1

The error indicates that there is no Maven repository configured that contains the archetype you want to use. Default Maven installations are not aware of the Adobe repository which contains the archetype. You have to configure the repository.
Usually, you should use the following repository for your AEM projects:
http://repo.adobe.com/nexus/content/groups/public
This repository contains the archetype you want to use:
https://repo.adobe.com/nexus/content/groups/public/com/adobe/granite/archetypes/aem-project-archetype/18/
Based on the documentation (see Links below) this would be a minimal Maven settings.xml that would allow you to use the AEM Maven archetype:
<settings
xmlns="http://maven.apache.org/SETTINGS/1.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0
https://maven.apache.org/xsd/settings-1.0.0.xsd">
<profiles>
<profile>
<id>adobe-public</id>
<activation>
<activeByDefault>true</activeByDefault>
</activation>
<properties>
<releaseRepository-Id>adobe-public-releases</releaseRepository-Id>
<releaseRepository-Name>Adobe Public Releases</releaseRepository-Name>
<releaseRepository-URL>http://repo.adobe.com/nexus/content/groups/public</releaseRepository-URL>
</properties>
<repositories>
<repository>
<id>adobe-public-releases</id>
<name>Adobe Basel Public Repository</name>
<url>http://repo.adobe.com/nexus/content/groups/public</url>
<releases>
<enabled>true</enabled>
<updatePolicy>never</updatePolicy>
</releases>
<snapshots>
<enabled>false</enabled>
</snapshots>
</repository>
</repositories>
<pluginRepositories>
<pluginRepository>
<id>adobe-public-releases</id>
<name>Adobe Basel Public Repository</name>
<url>http://repo.adobe.com/nexus/content/groups/public</url>
<releases>
<enabled>true</enabled>
<updatePolicy>never</updatePolicy>
</releases>
<snapshots>
<enabled>false</enabled>
</snapshots>
</pluginRepository>
</pluginRepositories>
</profile>
</profiles>
</settings>
Note: I set activeByDefault to true for the adobe-public profile. This way you do not need to pass -Padobe-public on the command line to activate the profile.
Now, if you run the following command you should be able to use the archetype:
mvn archetype:generate \
-DarchetypeGroupId=com.adobe.granite.archetypes \
-DarchetypeArtifactId=aem-project-archetype \
-DarchetypeVersion=18
Links:
https://helpx.adobe.com/experience-manager/kb/SetUpTheAdobeMavenRepository.html

Answer 2

In the Adobe profile the 'settings' xml tag is missing:
<settings
xmlns="http://maven.apache.org/SETTINGS/1.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0
https://maven.apache.org/xsd/settings-1.0.0.xsd">
<profiles>
<profile>
.....
</profile>
</profiles>
</settings>

Answer 3

Just update the settings.xml file in the m2 folder. Please look into the below link if you are using archtype 13 and 6.4
https://helpx.adobe.com/experience-manager/using/maven_arch13.html
Also in the profile tag please update the adobe repo url to 'https' instead of http.