mdopt

markdown option parsing

Useful in combination with marked-man to ensure your man pages are always up to date by making the docs a core part of the cli's runtime. (related: package.json man).

Check out the test cases, or view the example below to get an idea of what a properly formatted options section looks like.

Example

cli.js:

const mdopt = require('mdopt');

const { readFileSync } = require('fs');

const md = readFileSync('path.md', {
  encoding: 'utf8'
});

const argv = process.argv.slice(2)

const argv = mdopt(argv, md);

console.log(argv);

argv is a variable that holds a minimist object that has been populated (aliases, defaults) according to the provided markdown file.

A sample session might look like this:

$ node cli.js
Error: Missing required option demand

$ node cli.js --demand
Error: Missing required option pghost

$ PGHOST=localhost node demo.js --demand hey hey you you
{ _: [ 'hey', 'hey', 'you', 'you' ],
  f: false,
  flag: false,
  home: '/home/jay',
  demand: true,
  default: 'foo',
  d: 'foo',
  pghost: 'localhost' }

And finally what the spec.md file looks like demonstrating all available options:

spec.md

# demo -- A demonstration of the features & formatting

## SYNOPSIS

sample [flags] `<first>` `<last>` `[pet]`

## OPTIONS

### -f, --flag

This is a boolean flag as there is no values that
follow the flag.  It can be accessed with $('f') or
$('flag')

### --anything ANYTHING

This flag expects a value to come after it. It can be a
number, a string, etc. The type will be auto detected
and the value of $('anything') will be that value.

### -s "VALUE", --string "VALUE"

Same as above, except that the value placeholder is in
quotes meaning that no type detection is performed, and
it is kept as a string. Give it `000123` and it will
remain `000123` vs. converting it to a number resulting
in `123`.

### --default=SOMETHING, -d SOMETHING (default=foo)

It is also possible to set default values.

### --home (default=$HOME)

And use environment variables to set those
defaults. Any default value beginning with a `$` will
be treated as an environment variable.

### --demand (required)

We can also demand that a flag should be set.

### --pghost "URI" (required, default=$PGHOST)

Combining required and using environment variables as
defaults is a good way to ensure that the value will be
set one way or another.

## AUTHORS

... Another section

## BUGS

... Another section. Add as many sections as you want.