feat: ignore context.TODO and context.Background

pkg/analyzer/analyzer.go

@@ -169,6 +169,18 @@ func findNestedContext(pass *analysis.Pass, node ast.Node, stmts []ast.Stmt) *as
 			continue
 		}
 
+		// Ignore [context.Background] & [context.TODO].
+		if call, ok := assignStmt.Rhs[0].(*ast.CallExpr); ok {
+			if selector, ok := call.Fun.(*ast.SelectorExpr); ok {
+				ident, identOK := selector.X.(*ast.Ident)
+				if identOK &&
+					ident.Name == "context" &&
+					(selector.Sel.Name == "Background" || selector.Sel.Name == "TODO") {
+					continue
+				}
+			}
+		}
+
 		// allow assignment to non-pointer children of values defined within the loop
 		if lhs := getRootIdent(pass, assignStmt.Lhs[0]); lhs != nil {
 			if obj := pass.TypesInfo.ObjectOf(lhs); obj != nil {

testdata/src/example.go

@@ -1,6 +1,9 @@
 package src
 
-import "context"
+import (
+	"context"
+	"testing"
+)
 
 func example() {
 	ctx := context.Background()
@@ -228,3 +231,21 @@ func okMiddleware2(ctx context.Context) func(ctx context.Context) error {
 func doSomethingWithCtx(ctx context.Context) error {
 	return nil
 }
+
+func testCasesInit(t *testing.T) {
+	cases := []struct {
+		ctx context.Context
+	}{
+		{},
+		{
+			ctx: context.WithValue(context.Background(), "key", "value"),
+		},
+	}
+	for _, tc := range cases {
+		t.Run("some test", func(t *testing.T) {
+			if tc.ctx == nil {
+				tc.ctx = context.Background()
+			}
+		})
+	}
+}