Add command line option to set & view default options

[delphidabbler]

At present the only way to configure PasHi is to create a file named config in PasHi's data directory at %APPDATA%\DelphiDabbler\PasHi.

It would be useful to be able to write configuration information to the config file from the command line.

A command line option could be added to do this that is similar to git config: something like pashi --options.

For example

• --options set command=param or --options set command would write the given command to the config file, with any required parameter. Setting the same option twice would replace any parameter in the config file. For a parameter-less option this would be a no-op.
• --options check command would indicate if a command was present in the config file or not. For a command with a parameter the parameter would be displayed.
• --options show would display all current options in the config file.
• --options delete command would remove the given command from the config file. An error would be reported if the command wasn't present.
• --options purge would remove all options from the config file (or delete the file).

It would be useful if commands being set could be validated.

The command should also prevent any blacklisted commands from being written to the config file. Blacklisted commands (i.e. those that aren't valid in the config file) should be help and options.

[delphidabbler]

Could also add --options edit to display config file in a text editor.

[delphidabbler]

Considering using --config rather than --options as main command.

Another possibility is to use several related commands to reduce number of parameters. Thus:

Original command	Alternative command
--options set command=param	--config-set command=param
--options set command	--config-set command
--options check command	--config-find command
--options show	--config-show
--options delete command	--config-delete command
--options purge	--config-purge
--options edit	--config-edit

May need to experiment with both approaches.

[delphidabbler]

Probably adding this to v3 now.

[delphidabbler]

Further discussion of this and other v3 development ideas to continue in the v3 Development Project