OptArgs2

Changes for version 2.0.0_6 - 2022-10-04

API / Behaviour Changes:
- Partially restore legacy arg(), opt() and "optargs => sub {}" interfaces to ease migration. The arg "fallback" parameter was not restored, and neither was any documentation.
- StatusLine reworked to be much simpler in interface and implementation.
Bug Fixes:
- Option types & defaults are no longer UPPERCASE
Packaging:
- Add missing ExtUtils::MakeMaker::CPANfile dependency

API / Behaviour Changes:
- None
New Features:
- ANSI terminal codes are used to color output, which can be disabled with the new 'show_color' option.
- New optargs2() function
Enhancements:
- OptArgs2::STYLE_HELPTREE output has been improved and now includes sub-command comments
- OptArgs2::Pager now includes '-S' in the $LESS environment variable and documents this.
Bug Fixes:
- Fix a StatusLine import with no arguments.

New Features:
- New OptArgs2::StatusLine package for terminal status lines
Enhancements:
- Allow OptArgs2::Pager to work independently (by splitting out OptArgs2::Mo into its own file)
- Code re-organisation
- Show SubCmd arguments in usage message
Bug Fixes:
- Fix for Getopt::Args2 conversion with a test
Dependencies:
- Minimum of perl 5.16 for package BLOCK syntax
- Test::Output for StatusLine tests
Packaging:
- Clean up non-indexed packages list

API / Behaviour Changes:
- Changed OptArgs2::Pager on()/off() methods to start_pager(), stop_pager() and page() functions.
Enhancements:
- Pager will only be started for usage messages with more lines than the terminal height.
Dependencies:
- Exporter::Tidy for OptArgs2::Pager.
- Term::Size::Perl and/or Win32::Console

API / Behaviour Changes:
- New 'show_default' feature
- Opt 'ishelp' no longer conflicts with 'trigger'
- The 'default' and 'required' parameters are no longer allowed together.
New Features:
- New 'OptArgRef' arg type to support command aliases. I.e. capturing options and arguments that are passed back into class_optargs() again.
- Pipe usage messages through a STDOUT pager
Enhancements:
- Various minor code refactoring improvements.
- Opt 'ishelp' now does what the documentation implies.
- Support default values relying on other default values
- Rework internal error reporting and usage generation
- New usage layout showing default values
Bug Fixes:
- Fix a ==/= comparison/assignment error in the usage() function introduced by 2347144c.
- Bool option with true default turned off when --no-bool used.
Dependencies:
- File::Which for new OptArgs2::Pager module.
Packaging:
- Stop including ".readme_from" file in distribution

Enhancements:
- Refactor error handling to make it clearer and simpler.
- Report all caller (user) errors where they occur
Bug Fixes:
- The command abbreviation feature has never worked due to an arrayref dereferencing mistake. Discovered and fixed by Mario Domgoergen (mdom at Github).