sahvx655-wq created FELIX-6842:
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Summary: gogo-jline: Implement support for -u (UTC) option in date
command
Key: FELIX-6842
URL: https://issues.apache.org/jira/browse/FELIX-6842
Project: Felix
Issue Type: Bug
Components: Gogo JLine
Reporter: sahvx655-wq
The JLine shell {{date}} command documentation specifies support for the {{-u}}
(UTC) timezone option, but the current implementation in
{{org.apache.felix.gogo.jline.Posix.java}} does not recognize it in the
argument parsing logic. As a result, using {{-u}} causes an
{{{}IllegalArgumentException{}}}.
The usage documentation includes the {{-u}} flag, but it is not handled during
option parsing and falls through to the default error case.
This change adds proper handling for the {{-u}} option by detecting it during
argument parsing and treating it as a valid flag. When {{-u}} is specified, the
command switches to UTC mode by configuring {{SimpleDateFormat}} with the UTC
timezone for formatting and parsing.
A unit test {{testDateUtc}} has been added in {{PosixTest.java}} to verify the
behavior. It confirms that {{date -u '+%z'}} produces the correct UTC output.
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