Hadolint parser callback never calls called

[laurentgoudet]

This seems similar to other issues like https://github.com/mfussenegger/nvim-lint/issues/500, but for some reason I cannot make hadolint work. As in:

I am on the latest hadolint (2.12.0):

$  hadolint -v
Haskell Dockerfile Linter 2.12.0

My Dockerfile has a couple of errors:

$ hadolint -f json - < Dockerfile
[{"code":"DL3008","column":1,"file":"-","level":"warning","line":4,"message":"Pin versions in apt get install. Instead of `apt-get install <package>` use `apt-get install <package>=<version>`"},{"code":"DL3015","column":1,"file":"-","level":"info","line":4,"message":"Avoid additional packages by specifying `--no-install-recommends`"},{"code":"DL4006","column":1,"file":"-","level":"warning","line":17,"message":"Set the SHELL option -o pipefail before RUN with a pipe in it. If you are using /bin/sh in an alpine image or if your shell is symlinked to busybox then consider explicitly setting your SHELL to /bin/ash, or disable this check"}]%

Yet, in https://github.com/mfussenegger/nvim-lint/blob/master/lua/lint/linters/hadolint.lua, the parser callback never gets called. The linter does load properly though, i.e. introducing a typo in the config would fail on lint

 local severities = {
  error = vim.diagnostic.severity.ERROR,
  warning = vim.diagnostic.severity.WARN,
  info = vim.diagnostic.severity.INFO,
  style = vim.diagnostic.severity.HINT,
}

vim.print('this shows')
return {
  cmd = "hadolint",
  stdin = true,
  stream = "stdout",
  ignore_exitcode = true,
  args = { "-f", "json", "-" },
  parser = function(output)  <-- this never gets called
    vim.print('this never shows')
    local findings = vim.json.decode(output)
    local diagnostics = {}

    for _, finding in pairs(findings or {}) do
      table.insert(diagnostics, {
        lnum = finding.line - 1,
        col = finding.column,
        end_lnum = finding.line - 1,
        end_col = finding.column,
        severity = assert(severities[finding.level], "missing mapping for severity " .. finding.level),
        message = finding.message,
        source = "hadolint",
        code = finding.code,
      })
    end

    return diagnostics
  end,
}

In https://github.com/mfussenegger/nvim-lint/blob/master/lua/lint.lua:241:

• read_start gets called once

  if not stream or stream == "stdout" then
    vim.print('read_start gets called')
    self.stdout:read_start(read_output(cwd, bufnr, parser, publish))

• the read_output callback never gets called

local function read_output(cwd, bufnr, parser, publish_fn)
  return function(err, chunk)
    vim.print('callback never gets called')
    assert(not err, err)
    if chunk then
      parser.on_chunk(chunk, bufnr)
    else
      parser.on_done(publish_fn, bufnr, cwd)
    end
  end
end

Any hint how to debug that further? I tried switching the stream to both. Setting ignore_exitcode to false shows no error. Running hadolint manually with an empty stream shows []. I am on the latest nvim-lint as well, and nvim 0.10.4

[mfussenegger]

Would it work if you set stdin = false ?

I can't reproduce the issue, hadolint (2.12.0) works fine for me.

[leonasdev]

I have same issue. But in my case, read_output gets called once and parser callback never called.

Others linter like pylint runs fine.

on macOS 15, nvim 0.10.4.

[leonasdev]

In my test: On Ubuntu 22.04 + nvim 0.11.0 + hadolint 2.12.0 does not have this issue. On macOS 15 + nvim 0.11.0 + hadolint 2.12.0 does have this issue. (and none-ls also not working properly with hadolint, so i guess it probably casued by the macOS version of hadolint)