From d98d6dffef50c6def88d3541abac4771403de09e Mon Sep 17 00:00:00 2001
From: Ge Song <gesong0606@gmail.com>
Date: Wed, 29 Mar 2023 18:11:01 +0800
Subject: [PATCH] add contexthelper;

---
 contexthelper/go.mod      |  3 +++
 contexthelper/nocancel.go | 17 +++++++++++++++++
 2 files changed, 20 insertions(+)
 create mode 100644 contexthelper/go.mod
 create mode 100644 contexthelper/nocancel.go

diff --git a/contexthelper/go.mod b/contexthelper/go.mod
new file mode 100644
index 0000000..f1d7824
--- /dev/null
+++ b/contexthelper/go.mod
@@ -0,0 +1,3 @@
+module git.blauwelle.com/go/crate/contexthelper
+
+go 1.20
diff --git a/contexthelper/nocancel.go b/contexthelper/nocancel.go
new file mode 100644
index 0000000..ea35f79
--- /dev/null
+++ b/contexthelper/nocancel.go
@@ -0,0 +1,17 @@
+package contexthelper
+
+import "context"
+
+// WithNoCancel 阻断上级 ctx 的中断信号
+// 想要使用上级 ctx 中的值但不想受上级 ctx 控制退出时可以使用
+func WithNoCancel(ctx context.Context) context.Context {
+	return &noCancelCtx{Context: ctx}
+}
+
+type noCancelCtx struct {
+	context.Context
+}
+
+func (ctx *noCancelCtx) Done() <-chan struct{} {
+	return nil
+}