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bfa02fd418
This ports our example testing over to [trycmd](https://docs.rs/) so we can: - More thoroughly test our examples - Provide always-up-to-date example usage The old way of testing automatically picked up examples. This new way requires we have a `.md` file that uses the example in some way. Notes: - Moved overall example description to the `.md` file - I added cross-linking between related examples - `14_groups` had a redundant paragraph (twice talked about "one and only one"
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This example shows how to create an application with several arguments using usage strings
Let's first check out the help:
$ 01a_quick_example --help
MyApp 1.0
Kevin K. <kbknapp@gmail.com>
Does awesome things
USAGE:
01a_quick_example[EXE] [OPTIONS] [output] [SUBCOMMAND]
ARGS:
<output> Sets an optional output file
OPTIONS:
-c, --config <FILE> Sets a custom config file
-d, --debug Turn debugging information on
-h, --help Print help information
-V, --version Print version information
SUBCOMMANDS:
help Print this message or the help of the given subcommand(s)
test does testing things
By default, the program does nothing:
$ 01a_quick_example
Debug mode is off
But you can mix and match the various features
$ 01a_quick_example -dd test
Debug mode is on
Not printing testing lists...