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picker.go
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/
picker.go
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package hotfix
import (
"fmt"
"reflect"
"regexp"
"strings"
"github.com/go-hotfix/assembly"
)
var closureExp = regexp.MustCompile(`func\d+(\.\d+)*`)
// FuncPicker List of functions that need to be hotfix.
type FuncPicker func(dwarfAssembly assembly.DwarfAssembly) ([]string, error)
// Func to specify one or more functions, you must use the full qualified name of the function.
//
// example/data.TestAdd
// example/data.(*DataType).TestHotfix
// example/data.testPrivateFunc
// example/data.(*DataType).test
func Func(funcNames ...string) FuncPicker {
return func(_ assembly.DwarfAssembly) ([]string, error) {
for _, name := range funcNames {
if closureExp.MatchString(name) {
return nil, fmt.Errorf("closure unsupported: %s", name)
}
}
return funcNames, nil
}
}
// Classes To fix a specified class or classes (all member functions), the fully qualified name of the class must be used.
//
// example/data.DataType
// *example/data.DataType
func Classes(classNames ...string) FuncPicker {
return func(dwarfAssembly assembly.DwarfAssembly) ([]string, error) {
var methods []string
for _, className := range classNames {
// 查找类型
classType, err := dwarfAssembly.FindType(className)
if nil != err {
return nil, fmt.Errorf("%w: class not found: %s", err, className)
}
// 检查类型必须是 struct/*struct
if reflect.Struct != classType.Kind() && (reflect.Ptr != classType.Kind() || classType.Elem().Kind() != reflect.Struct) {
return nil, fmt.Errorf("%s is not a struct or *struct (%s)", className, classType.String())
}
isPtr := reflect.Ptr == classType.Kind()
if isPtr {
classType = classType.Elem()
}
var prefixName string
if isPtr {
// example.data.(*DataType).String
prefixName = classType.PkgPath() + ".(*" + classType.Name() + ")."
} else {
// example.data.DataType.String
prefixName = classType.PkgPath() + "." + classType.Name() + "."
}
dwarfAssembly.ForeachFunc(func(name string, pc uint64) bool {
if strings.HasPrefix(name, prefixName) && !closureExp.MatchString(name) {
methods = append(methods, name)
}
return true
})
}
return methods, nil
}
}
// Package To fix all export, private, and member functions in one or more packages, the full package name must be used
//
// example/data
func Package(pkgs ...string) FuncPicker {
return func(dwarfAssembly assembly.DwarfAssembly) ([]string, error) {
var methods []string
for _, pkg := range pkgs {
// example/data.testPrivateFunc
// example/data.(*DataType).TestHotfix
var prefixName = pkg
dwarfAssembly.ForeachFunc(func(name string, pc uint64) bool {
if strings.HasPrefix(name, prefixName) && !closureExp.MatchString(name) {
methods = append(methods, name)
}
return true
})
}
return methods, nil
}
}
// Any combine multiple FuncPicker
func Any(funcPickers ...FuncPicker) FuncPicker {
return func(dwarfAssembly assembly.DwarfAssembly) ([]string, error) {
var methods []string
for _, picker := range funcPickers {
mm, err := picker(dwarfAssembly)
if nil != err {
return nil, err
}
methods = append(methods, mm...)
}
return methods, nil
}
}