Add linter for rpmspec

lua/lint/linters/rpmspec.lua

@@ -0,0 +1,39 @@
+-- This is a linter for https://rpm.org/
+local parsers = {
+  -- errors
+  require('lint.parser').from_pattern(
+    [[(%w+): line (%d+): (.*)]],
+    { 'severity', 'lnum', 'message' },
+    nil,
+    { ['severity'] = vim.diagnostic.severity.ERROR, ['source'] = 'rpmspec' }
+  ),
+
+  -- warnings
+  require('lint.parser').from_pattern(
+    [[(%w+): (.*) on line (%d+):]],
+    { 'severity', 'message', 'lnum' },
+    nil,
+    { ['severity'] = vim.diagnostic.severity.WARNING, ['source'] = 'rpmspec' }
+  ),
+}
+
+-- Usage: rpmspec -P <file>
+return {
+  cmd = 'rpmspec',
+  stdin = false,
+  append_fname = true,
+  args = { '-P' },
+  stream = 'stderr',
+  ignore_exitcode = true,
+  parser = function(output, bufnr)
+    local diagnostics = {}
+
+    for _, parser in ipairs(parsers) do
+      local result = parser(output, bufnr)
+
+      vim.list_extend(diagnostics, result)
+    end
+
+    return diagnostics
+  end,
+}

tests/rpmspec_spec.lua

@@ -0,0 +1,37 @@
+describe('linter.rpmspec', function()
+  it('can parse the output', function()
+    local parser = require('lint.linters.rpmspec').parser
+    local bufnr = vim.uri_to_bufnr('file:///foo.spec')
+    local output = [[
+warning: Macro expanded in comment on line 1: %{?fedora}
+error: line 2: Unknown tag: %if
+]]
+    local result = parser(output, bufnr)
+
+    assert.are.same(2, #result)
+
+    local expected_warning_1 = {
+      col = 0,
+      end_col = 0,
+      end_lnum = 1,
+      lnum = 1,
+      message = 'Macro expanded in comment',
+      severity = 2,
+      source = 'rpmspec',
+    }
+
+    assert.are.same(expected_warning_1, result[1])
+
+    local expected_error_1 = {
+      col = 0,
+      end_col = 0,
+      end_lnum = 2,
+      lnum = 2,
+      message = 'Unknown tag: %if',
+      severity = 1,
+      source = 'rpmspec',
+    }
+
+    assert.are.same(expected_error_1, result[2])
+  end)
+end)