[LOG4J2-2011] replace JCommander with picocli

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.8.2
• Fix Version/s: 2.9.0
• Component/s: Core, Servers
• Assignee: Remko Popma
• Reporter: Remko Popma
• Created: 14/Aug/17 09:26
• Updated: 15/Aug/17 22:25
• Resolved: 14/Aug/17 16:29

Description

As discussed in the mailing list, replace uses of JCommander with picocli to get

• customizable usage help
• usage help with ANSI colors
• better support for positional parameters (so we can use positional parameters for mandatory arguments and options for optional arguments)
• include picocli as source so users can run these applications without requiring an external dependency

Candidates for usage are:

log4j-core

• CustomLoggerGenerator
• ExtendedLoggerGenerator
• Generate
• PluginManager

log4j-jmx-gui

• ClientGui

log4j-1.2-api

• Log4j1ConfigurationConverter

logging-log4j-tools/log4j-server

• AbstractSocketServer
• TcpSocketServer
• UdpSocketServer