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feature: defaulted functionality #211

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merged 4 commits into from Nov 1, 2019
Merged

feature: defaulted functionality #211

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bee73de
log defaulted flags
juergba Oct 28, 2019
6e4e772
additional tests
juergba Oct 29, 2019
15f3f6d
docu
juergba Oct 29, 2019
1369df7
review - additional test
juergba Nov 1, 2019
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8 changes: 6 additions & 2 deletions README.md
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Expand Up @@ -99,10 +99,14 @@ yargs engine.
* `argv`: an object representing the parsed value of `args`
* `key/value`: key value pairs for each argument and their aliases.
* `_`: an array representing the positional arguments.
* [optional] `--`: an array with arguments after the end-of-options flag `--`.
* `error`: populated with an error object if an exception occurred during parsing.
* `aliases`: the inferred list of aliases built by combining lists in `opts.alias`.
* `newAliases`: any new aliases added via camel-case expansion.
* `configuration`: the configuration loaded from the `yargs` stanza in package.json.
* `newAliases`: any new aliases added via camel-case expansion:
* `boolean`: `{ fooBar: true }`
* `defaulted`: any new argument created by `opts.default`, no aliases included.
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@juergba what's your reasoning for not including aliases? @coreyfarrell do you think you can work with this limitation?

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Parse.detailed() also returns aliases which includes all aliases, so the information would be redundant.
It's no big effort to add the aliases to defaulted, I just need a decision.

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For my use it would be fine if defaulted did not list aliases, as long as setting an alias causes the original key to be excluded from defaulted. Would you mind adding a test for this?

    it('setting an alias removes associated key from defaulted', function () {
      var parsed = parser.detailed('--foo abc', {
        default: { kaa: 'abc' },
        alias: { foo: 'kaa' }
      })
      parsed.argv.should.deep.equal({ '_': [], kaa: 'abc', foo: 'abc' })
      parsed.defaulted.should.deep.equal({})
    })

Sorry I don't have a chance to actually run this test right now but in theory it should work.

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Done, I added your test.

* `boolean`: `{ foo: true }`
* `configuration`: given by default settings and `opts.configuration`.
<a name="configuration"></a>
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7 changes: 5 additions & 2 deletions index.js
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Expand Up @@ -35,6 +35,7 @@ function parse (args, opts) {
var notFlagsOption = configuration['populate--']
var notFlagsArgv = notFlagsOption ? '--' : '_'
var newAliases = {}
var defaulted = {}
// allow a i18n handler to be passed in, default to a fake one (util.format).
var __ = opts.__ || util.format
var error = null
Expand Down Expand Up @@ -317,7 +318,7 @@ function parse (args, opts) {
applyEnvVars(argv, false)
setConfig(argv)
setConfigObjects()
applyDefaultsAndAliases(argv, flags.aliases, defaults)
applyDefaultsAndAliases(argv, flags.aliases, defaults, true)
applyCoercions(argv)
if (configuration['set-placeholder-key']) setPlaceholderKeys(argv)

Expand Down Expand Up @@ -627,10 +628,11 @@ function parse (args, opts) {
return argv
}

function applyDefaultsAndAliases (obj, aliases, defaults) {
function applyDefaultsAndAliases (obj, aliases, defaults, canLog = false) {
Object.keys(defaults).forEach(function (key) {
if (!hasKey(obj, key.split('.'))) {
setKey(obj, key.split('.'), defaults[key])
if (canLog) defaulted[key] = true

;(aliases[key] || []).forEach(function (x) {
if (hasKey(obj, x.split('.'))) return
Expand Down Expand Up @@ -895,6 +897,7 @@ function parse (args, opts) {
error: error,
aliases: flags.aliases,
newAliases: newAliases,
defaulted: defaulted,
configuration: configuration
}
}
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37 changes: 37 additions & 0 deletions test/yargs-parser.js
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Expand Up @@ -1215,6 +1215,43 @@ describe('yargs-parser', function () {
parse.should.have.property('t', false).and.be.a('boolean')
parse.should.have.property('_').and.deep.equal(['moo'])
})

describe('track defaulted', function () {
it('should log defaulted options - not specified by user', function () {
var parsed = parser.detailed('', {
default: { foo: 'abc', 'bar.prop': 33, baz: 'x' },
configObjects: [{ baz: 'xyz' }]
})
parsed.argv.should.deep.equal({ '_': [], baz: 'xyz', foo: 'abc', bar: { prop: 33 } })
parsed.defaulted.should.deep.equal({ foo: true, 'bar.prop': true })
})

it('should not log defaulted options - specified without value', function () {
var parsed = parser.detailed('--foo --bar.prop', {
default: { foo: 'abc', 'bar.prop': 33 }
})
parsed.argv.should.deep.equal({ '_': [], foo: 'abc', bar: { prop: 33 } })
parsed.defaulted.should.deep.equal({})
})

it('should log defaulted options - no aliases included', function () {
var parsed = parser.detailed('', {
default: { kaa: 'abc' },
alias: { foo: 'kaa' }
})
parsed.argv.should.deep.equal({ '_': [], kaa: 'abc', foo: 'abc' })
parsed.defaulted.should.deep.equal({ kaa: true })
})

it('setting an alias excludes associated key from defaulted', function () {
var parsed = parser.detailed('--foo abc', {
default: { kaa: 'abc' },
alias: { foo: 'kaa' }
})
parsed.argv.should.deep.equal({ '_': [], kaa: 'abc', foo: 'abc' })
parsed.defaulted.should.deep.equal({})
})
})
})

describe('camelCase', function () {
Expand Down