Incorrect indentation.

[amano-kenji]

neovim lua mode prefers

node_om:connect("object-added", function (node_om, node)
  -- If the node is added, print update.
  print("update")
  node:connect("params-changed", function (node, paramId)
    -- If the node's parameters changed, print update.
    print("update")
  end)
end)

emacs lua mode gives me

node_om:connect("object-added", function (node_om, node)
    -- If the node is added, print update.
    print("update")
    node:connect("params-changed", function (node, paramId)
        -- If the node's parameters changed, print update.
        print("update")
    end)
end)

although lua indent level is 2. It is giving me the indent level of 4.

[sogaiu]

I investigated a bit with a smaller example.

With:

(setq lua-indent-level 2)
(setq lua-indent-nested-block-content-align nil)

and starting with the sample code:

fun("sample", function (a, b)
print("hi")
end)

and point at the beginning of the second line (the one that starts with text print("hi").

The result was:

fun("sample", function (a, b)
    print("hi")
end)

The result was an indentation by 4 spaces here and I think the expectation is that it should be 2 spaces.

I think this reproduces the reported behavior.

---

I tried tracing execution of lua-indent-line with edebug to see why the result was 4.

Roughly the overall flow appears to be:

• lua-indent-line
  • lua-calculate-indentation -> 4
    • lua-calculate-indentation-block-modifier -> 4
      • lua-accumulate-indentation-info -> (absolute . 4)
        • lua-accumulate-indentation-info -> ((relative . 2) (relative . 2) (absolute . 0))

I don't understand the details, but perhaps the above helps a bit with investigation (^^;

Also, this issue looked somewhat similar.

FWIW, I used Emacs 29.2 and it appears I'm using d074e41 of lua-mode.

[amano-kenji]

That's because function (a, b) adds two spaces to the indentation on top of fun which adds two spaces.

In emacs lua mode, indentation adds up. Indentation should not add up.