feat: add mypy,mypyc,dmypy

README.md

@@ -61,5 +61,8 @@
 - [ ] [shellcheck](https://github.com/koalaman/shellcheck)
 - [ ] [stylelint](https://stylelint.io/)
 - [x] [ruff](https://github.com/astral-sh/ruff)
+- [x] [mypy](https://mypy.readthedocs.io/en/stable/index.html)
+- [x] [mypyc](https://mypyc.readthedocs.io/en/latest/index.html)
+- [x] [dmypy](https://mypy.readthedocs.io/en/stable/mypy_daemon.html)
 
 ## License MIT

lua/guard-collection/linter/init.lua

@@ -15,4 +15,7 @@ return {
   shellcheck = require('guard-collection.linter.shellcheck'),
   stylelint = require('guard-collection.linter.stylelint'),
   ruff = require('guard-collection.linter.ruff'),
+  mypy = require('guard-collection.linter.mypy').mypy,
+  mypyc = require('guard-collection.linter.mypy').mypyc,
+  dmypy = require('guard-collection.linter.mypy').dmypy,
 }

lua/guard-collection/linter/mypy/base.lua

@@ -0,0 +1,78 @@
+local lint = require('guard.lint')
+
+return function(cmd, args)
+  local opts = {
+    offset = 1,
+    severities = {
+      error = lint.severities.error,
+      warning = lint.severities.warning,
+      note = lint.severities.info,
+    },
+    source = 'mypy',
+  }
+
+  -- see spec for pattern examples
+  local full = {
+    regex = '([^:]+):(%d+):(%d+):(%d+):(%d+): (%a+): (.*)  %[([%a-]+)%]',
+    groups = { 'filename', 'lnum', 'col', 'end_lnum', 'end_col', 'severity', 'message', 'code' },
+  }
+
+  -- no err code
+  local no_err = {
+    regex = '([^:]+):(%d+):(%d+):(%d+):(%d+): (%a+): (.*)',
+    groups = { 'filename', 'lnum', 'col', 'end_lnum', 'end_col', 'severity', 'message' },
+  }
+
+  return {
+    cmd = cmd,
+    args = args,
+    fname = true,
+    parse = function(result, bufnr)
+      local diags, offences = {}, {}
+
+      local lines = vim.split(result, '\n', { trimempty = true })
+
+      for _, line in ipairs(lines) do
+        local offence = {}
+
+        local groups = full.groups
+        local matches = { line:match(full.regex) }
+
+        if #matches ~= #groups then
+          matches = { line:match(no_err.regex) }
+          groups = no_err.groups
+        end
+
+        -- regex matched
+        if #matches == #groups then
+          for i = 1, #groups do
+            offence[groups[i]] = matches[i]
+          end
+
+          offences[#offences + 1] = offence
+        end
+      end
+
+      vim.tbl_map(function(mes)
+        local code = mes.code
+        if not mes.code then
+          code = ''
+        end
+        local diag = lint.diag_fmt(
+          bufnr,
+          tonumber(mes.lnum) - opts.offset,
+          tonumber(mes.col) - opts.offset,
+          ('%s [%s]'):format(mes.message, code),
+          opts.severities[mes.severity],
+          opts.source
+        )
+
+        diag.end_col = tonumber(mes.end_col) - opts.offset
+        diag.end_lnum = tonumber(mes.end_lnum) - opts.offset
+        diags[#diags + 1] = diag
+      end, offences)
+
+      return diags
+    end,
+  }
+end

lua/guard-collection/linter/mypy/init.lua

@@ -0,0 +1,20 @@
+local base = require('guard-collection.linter.mypy.base')
+
+local args = {
+  '--hide-error-codes',
+  '--hide-error-context',
+  '--no-color-output',
+  '--show-absolute-path',
+  '--show-column-numbers',
+  '--show-error-codes',
+  '--show-error-end',
+  '--no-error-summary',
+  '--no-pretty',
+}
+
+local unpack = table.unpack or unpack
+return {
+  mypy = base('mypy', args),
+  mypyc = base('mypyc', args),
+  dmypy = base('dmypy', { 'run', '--', unpack(args) }),
+}

test/linter/mypy_spec.lua

@@ -0,0 +1,84 @@
+describe('mypy', function()
+  it('can lint', function()
+    local helper = require('test.linter.helper')
+    local ns = helper.namespace
+    local ft = require('guard.filetype')
+    ft('python'):lint('mypy')
+    require('guard').setup()
+
+    local diagnostics = helper.test_with('python', {
+      [[def f(i: int) -> int:]],
+      [[    i += "123"]],
+      [[    return i]],
+      [[sum()]],
+    })
+    assert.are.same({
+      {
+        bufnr = 3,
+        col = 9,
+        end_col = 13,
+        end_lnum = 1,
+        lnum = 1,
+        message = 'Unsupported operand types for + ("int" and "str") [operator]',
+        namespace = 33,
+        severity = 1,
+        source = 'mypy',
+      },
+      {
+        bufnr = 3,
+        col = 0,
+        end_col = 4,
+        end_lnum = 3,
+        lnum = 3,
+        message = 'All overload variants of "sum" require at least one argument [call-overload]',
+        namespace = 33,
+        severity = 1,
+        source = 'mypy',
+      },
+      {
+        bufnr = 3,
+        col = 0,
+        end_col = 4,
+        end_lnum = 3,
+        lnum = 3,
+        message = 'Possible overload variants: []',
+        namespace = 33,
+        severity = 3,
+        source = 'mypy',
+      },
+      {
+        bufnr = 3,
+        col = 0,
+        end_col = 4,
+        end_lnum = 3,
+        lnum = 3,
+        message = '    def sum(Iterable[bool], /, start: int = ...) -> int []',
+        namespace = 33,
+        severity = 3,
+        source = 'mypy',
+      },
+      {
+        bufnr = 3,
+        col = 0,
+        end_col = 4,
+        end_lnum = 3,
+        lnum = 3,
+        message = '    def [_SupportsSumNoDefaultT <: _SupportsSumWithNoDefaultGiven] sum(Iterable[_SupportsSumNoDefaultT], /) -> _SupportsSumNoDefaultT | Literal[0] []',
+        namespace = 33,
+        severity = 3,
+        source = 'mypy',
+      },
+      {
+        bufnr = 3,
+        col = 0,
+        end_col = 4,
+        end_lnum = 3,
+        lnum = 3,
+        message = '    def [_AddableT1 <: SupportsAdd[Any, Any], _AddableT2 <: SupportsAdd[Any, Any]] sum(Iterable[_AddableT1], /, start: _AddableT2) -> _AddableT1 | _AddableT2 []',
+        namespace = 33,
+        severity = 3,
+        source = 'mypy',
+      },
+    }, diagnostics)
+  end)
+end)

test/setup.sh

@@ -8,13 +8,14 @@ sudo apt-get install -qqq \
     clang-format clang-tidy fish elixir &
 luarocks install luacheck &
 go install github.com/segmentio/golines@latest &
-pip -qqq install autopep8 black djhtml flake8 isort pylint yapf codespell ruff sqlfluff &
+go install github.com/golangci/golangci-lint/cmd/[email protected] &
+pip -qqq install autopep8 black djhtml flake8 isort pylint yapf codespell ruff sqlfluff mypy &
 npm install -g --silent \
     prettier @fsouza/prettierd sql-formatter shellcheck shfmt @taplo/cli &
 gem install -q rubocop &
 # Block, homebrew takes the longest time
 brew install \
-    swiftformat swift-format hadolint google-java-format pgformatter fnlfmt ormolu golangci-lint
+    swiftformat swift-format hadolint google-java-format pgformatter fnlfmt ormolu
 
 # Install standalone binary packages
 bin="/home/runner/.local/bin"