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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,79 @@ | ||
| package ast | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "fmt" | ||
| "github.com/fatih/astrewrite" | ||
| "go/ast" | ||
| "go/format" | ||
| "go/parser" | ||
| "go/token" | ||
| "log" | ||
| "strings" | ||
| ) | ||
|
|
||
| const ( | ||
| DebugMode string = "DEV" | ||
| ) | ||
|
|
||
| func RenamePackage(packageName string) func(file *ast.File) *ast.File { | ||
| return func(file *ast.File) *ast.File { | ||
| file.Name = &ast.Ident{Name: packageName} | ||
| return file | ||
| } | ||
| } | ||
|
|
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| func ChangeType(typeName string, newType string, debugMode string) func(file *ast.File) *ast.File { | ||
| return func(file *ast.File) *ast.File { | ||
| rewriteFunc := func(n ast.Node) (ast.Node, bool) { | ||
| switch x := n.(type) { | ||
| case *ast.Ident: | ||
| if typeName == x.Name { | ||
| x = &ast.Ident{Name: newType} | ||
| } | ||
| return x, true | ||
| case *ast.CallExpr: | ||
| for i := 0; i < len(x.Args); i++ { | ||
| v, ok := x.Args[i].(*ast.Ident) | ||
| if ok { | ||
| if strings.ToLower(typeName) == strings.ToLower(v.Name) { | ||
| x.Args[i] = &ast.Ident{Name: fmt.Sprintf("%s.(%s)", v.Name, newType)} | ||
| } | ||
| } | ||
| } | ||
| return x, true | ||
| default: | ||
| if debugMode == DebugMode { | ||
| log.Println("ast node:") | ||
| log.Println(fmt.Sprintf("verbose value: %#v", x)) | ||
| log.Println(fmt.Sprintf("type: %T", x)) | ||
| log.Println(fmt.Sprintf("value: %v", x)) | ||
| } | ||
| } | ||
| return n, true | ||
| } | ||
|
|
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| astrewrite.Walk(file, rewriteFunc) | ||
|
|
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| return file | ||
| } | ||
| } | ||
|
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| func ModifyAst(dest []byte, fns ...func(*ast.File) *ast.File) ([]byte, error) { | ||
| destFset := token.NewFileSet() | ||
| destF, err := parser.ParseFile(destFset, "", dest, 0) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| for _, fn := range fns { | ||
| destF = fn(destF) | ||
| } | ||
|
|
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| var buf bytes.Buffer | ||
| if err := format.Node(&buf, destFset, destF); err != nil { | ||
| return nil, fmt.Errorf("couldn't format package code (%v)", err) | ||
| } | ||
|
|
||
| return buf.Bytes(), nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,5 +1,4 @@ | ||
| package worker | ||
|
|
||
| // used for code generation replacing | ||
| type GenericType interface {} | ||
|
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||
| type GenericType interface{} |