Add staticcheck tool

vendor/honnef.co/go/tools/quickfix/qf1006/qf1006.go

@@ -0,0 +1,61 @@
+package qf1006
+
+import (
+	"go/ast"
+	"go/token"
+
+	"honnef.co/go/tools/analysis/code"
+	"honnef.co/go/tools/analysis/edit"
+	"honnef.co/go/tools/analysis/lint"
+	"honnef.co/go/tools/analysis/report"
+	"honnef.co/go/tools/go/ast/astutil"
+	"honnef.co/go/tools/pattern"
+
+	"golang.org/x/tools/go/analysis"
+)
+
+var SCAnalyzer = lint.InitializeAnalyzer(&lint.Analyzer{
+	Analyzer: &analysis.Analyzer{
+		Name:     "QF1006",
+		Run:      run,
+		Requires: code.RequiredAnalyzers,
+	},
+	Doc: &lint.RawDocumentation{
+		Title: `Lift \'if\'+\'break\' into loop condition`,
+		Before: `
+for {
+    if done {
+        break
+    }
+    ...
+}`,
+
+		After: `
+for !done {
+    ...
+}`,
+		Since:    "2021.1",
+		Severity: lint.SeverityHint,
+	},
+})
+
+var Analyzer = SCAnalyzer.Analyzer
+
+var checkForLoopIfBreak = pattern.MustParse(`(ForStmt nil nil nil if@(IfStmt nil cond (BranchStmt "BREAK" nil) nil):_)`)
+
+func run(pass *analysis.Pass) (any, error) {
+	for node, m := range code.Matches(pass, checkForLoopIfBreak) {
+		pos := node.Pos() + token.Pos(len("for"))
+		r := astutil.NegateDeMorgan(m.State["cond"].(ast.Expr), false)
+
+		// FIXME(dh): we're leaving behind an empty line when we
+		// delete the old if statement. However, we can't just delete
+		// an additional character, in case there closing curly brace
+		// is followed by a comment, or Windows newlines.
+		report.Report(pass, m.State["if"].(ast.Node), "could lift into loop condition",
+			report.Fixes(edit.Fix("Lift into loop condition",
+				edit.ReplaceWithString(edit.Range{pos, pos}, " "+report.Render(pass, r)),
+				edit.Delete(m.State["if"].(ast.Node)))))
+	}
+	return nil, nil
+}