Demonstrates how to use Go AST traversal to refactor a code base. In this particular case, we are adding a context.Context parameter to all methods defined on an interface. This is a contrived example derived from a real world use case in a very large code base that I worked on.
cd refactor
go run main.goThe above will rewrite main.go in the example directory.
diff --git a/example/main.go b/example/main.go
index 3cb8d3b..2f7b048 100644
--- a/example/main.go
+++ b/example/main.go
@@ -1,6 +1,7 @@
package main
import (
+ "context"
"fmt"
"github.com/charithe/go-ast-refactoring/example/example"
@@ -10,6 +11,6 @@ func main() {
wc := example.WibbleClient{}
wcw := example.WibbleClientWrapper{WibbleClient: wc}
- fmt.Printf("WibbleClient: %d\n", wc.Wibble(10))
- fmt.Printf("WibbleClientWrapper: %d\n", wcw.Wibble(10))
+ fmt.Printf("WibbleClient: %d\n", wc.Wibble(context.Background(), 10))
+ fmt.Printf("WibbleClientWrapper: %d\n", wcw.Wibble(context.Background(), 10))
}
React
Typescript
Django
Laravel
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Tencent