Explain Build Profile in Maven.

A Build profile represents a set of configuration that is used to set or override default values of a Maven build. Using a build profile, a maven build can be customized for various application environments such as Production, Testing, Staging and development.

There are 4 different types of build profile.

• Per Project. Defined in the project's POM itself (pom.xml).
• Per User. Defined in the Maven-settings xml file (%USER_HOME%/.m2/settings.xml).
• Global. Defined in the global Maven-settings (${maven.home}/conf/settings.xml).
• Profile descriptor. a descriptor located in project basedir (profiles.xml).

A profile can be triggered or activated in several ways.

• Explicitly.
• Through Maven settings.
• Based on environment variables.
• OS settings.
• Present or missing files.

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