Add staticcheck tool

vendor/honnef.co/go/tools/lintcmd/directives.go

@@ -0,0 +1,55 @@
+package lintcmd
+
+import (
+	"strings"
+
+	"honnef.co/go/tools/lintcmd/runner"
+)
+
+func parseDirectives(dirs []runner.SerializedDirective) ([]ignore, []diagnostic) {
+	var ignores []ignore
+	var diagnostics []diagnostic
+
+	for _, dir := range dirs {
+		cmd := dir.Command
+		args := dir.Arguments
+		switch cmd {
+		case "ignore", "file-ignore":
+			if len(args) < 2 {
+				p := diagnostic{
+					Diagnostic: runner.Diagnostic{
+						Position: dir.NodePosition,
+						Message:  "malformed linter directive; missing the required reason field?",
+						Category: "compile",
+					},
+					Severity: severityError,
+				}
+				diagnostics = append(diagnostics, p)
+				continue
+			}
+		default:
+			// unknown directive, ignore
+			continue
+		}
+		checks := strings.Split(args[0], ",")
+		pos := dir.NodePosition
+		var ig ignore
+		switch cmd {
+		case "ignore":
+			ig = &lineIgnore{
+				File:   pos.Filename,
+				Line:   pos.Line,
+				Checks: checks,
+				Pos:    dir.DirectivePosition,
+			}
+		case "file-ignore":
+			ig = &fileIgnore{
+				File:   pos.Filename,
+				Checks: checks,
+			}
+		}
+		ignores = append(ignores, ig)
+	}
+
+	return ignores, diagnostics
+}