Enforcing spacing in method chaining

[tpalts]

I'm looking for a rule that enforces newline and spacing in method chaining. When chaining is used and there is a line break anywhere in the chain:

• ALL chained methods should begin on a new line
• with the arrow operator beginning that line
• and each line being indented +1 compared to the first line.

Question: What combination of rules could I use to achieve this, if any?

Examples:

Allow:

$x = Model::query()->where('x', 1)->where('y', 2)->get();
$x = Model::query()
    ->where('x', 1)
    ->where('y', 2)
    ->get();

Don't allow:

$x = Model::query()->where('x', 1)
->where('y', 2)->get();

$x = Model::query()
->where('x', 1)
->where('y', 2)
->get();

$x = Model::query()->
    where('x', 1)->
    where('y', 2)->
    get();

Thanks!

[jrfnl]

While it doesn't enforce all the rules you want, the PEAR.WhiteSpace.ObjectOperatorIndent sniff would probably be a good start. Also see the custom properties you can set for it: https://github.com/squizlabs/PHP_CodeSniffer/wiki/Customisable-Sniff-Properties#pearwhitespaceobjectoperatorindent

[gsherwood]

You don't mention if whitespace is allowed around object operators or not, but your code sample shows no spaces so you may want to look at Squiz.WhiteSpace.ObjectOperatorSpacing as well, but set the ignoreNewlines property to TRUE: https://github.com/squizlabs/PHP_CodeSniffer/wiki/Customisable-Sniff-Properties#squizwhitespaceobjectoperatorspacing

Have these suggestions given you enough rules to enforce what you want?