indentation not working if filetype=hack

[blurrcat]

Steps to reproduce:

• create new file "test.hack"
• add the following content

function test() {
$a = 1;
}

Action: gg=G to indent whole file

Expected Result: file should be indented properly

function test() {
    $a = 1;
}

Actual:

function test() {
$a = 1;
}

However it works if we place the function in a php file like

<hh
function test() {
$a = 1;
}

I see that indent expression for hack is GetHackIndent, which uses GetPhpIndent under the hood. However, according to :h php-indent, php indenting only works if PHP syntax is active. Maybe it's time to create an index expression dedicated to Hack?

[zheltikov]

I can confirm this issue. I have the same problem whenever I create any new code block in an existing file. For example when I add a new if block, it doesn't get properly indented.