Add an option to 'semi' for omitting semicolon before brace on one-line ( JSHint's 'lastsemic' )

[cho45]

When does this rule warn? Please describe and show example code:
Current 'semi' has two options 'always' or 'never'. But I want more smart semi constraint.

// Allow this
var reduced = list.reduce(function (r, i) { return r + i });

// But disallow this
var reduced = list.reduce(function (r, i) {
    return r + i 
});

Actually, this is smart exception of 'always'.

Is this rule preventing an error or is it stylistic?
This is stylistic issue.

Why is this rule a candidate for inclusion instead of creating a custom rule?
JSHint has an option like this. ref. http://jshint.com/docs/options/#lastsemic
I'm considering to use eslint instead of jshint. People who use this option may want same behavior of this.

Are you willing to create the rule yourself?
PR: #4386

[eslintbot]

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4. What you expected to happen instead

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[platinumazure]

"On one line" meaning, in a block which is contained on one line and containing only one statement?

[nzakas]

As best I can tell, the number of statements doesn't matter. It's that the block is on one line, so you don't need the last semicolon. These would be valid:

if (foo) { bar() }
if (foo) { bar(); baz() }

While these would be invalid:

if (foo) {
    bar()
}

if (foo) {
    bar();
    baz()
}

We'd need to come up with a good name for the option, though, as I'm not sure always-except-online is accurate.

[alberto]

Working on this.

Should it be and additional option or a second argument for always?

[nzakas]

Probably an additional option since it would only apply to "always"