Several CLI improvements #15
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Shorten the help text; previously, yargs wasn't leaving a space between a parameter's help text and its type (`classes[string]`). Fix a misspelling in help text. Show a warning if neither -i nor -p is specified, to make the command a bit less confusing for those who don't read the help. Allow providing multiple filenames as input. (See #10.) Allow input filenames to consist of a single JSON sample object as well as an array of JSON sample objects.
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This PR is a bit of a grab bag: I don't know if you'll want all of these changes as is or not.
Part of this is similar to #11 (which I hadn't seen before I put this together); one difference is that this accepts passing a single file containing JSON sample object or multiple files containing JSON arrays of sample objects, while #11 assumes that a single parameter means a JSON array of sample objects and multiple parameters mean multiple files containing JSON sample objects.
Specific changes:
Shorten the help text; previously, yargs wasn't leaving a space between a parameter's help text and its type (
classes[string]).Fix a misspelling in help text.
Show a warning if neither -i nor -p is specified, to make the command a bit less confusing for those who don't read the help.
Allow providing multiple filenames as input. (See #10.)
Allow input filenames to consist of a single JSON sample object as well as an array of JSON sample objects.