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loader.go
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loader.go
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package simplemock
import (
"errors"
"fmt"
"go/ast"
"go/types"
"golang.org/x/tools/go/packages"
)
type loadFunc func(pkgname string, node ast.Node, info typeInfo, err error) error
func load(patterns []string, f loadFunc) error {
var err error
conf := &packages.Config{
Mode: packages.NeedName | packages.NeedCompiledGoFiles | packages.NeedImports | packages.NeedSyntax | packages.NeedTypes | packages.NeedTypesInfo | packages.NeedImports,
}
loaded, err := packages.Load(conf, patterns...)
if err != nil {
return fmt.Errorf("load package error: %w", err)
}
if len(loaded) == 0 {
return errors.New("not found package")
} else if len(loaded) > 1 {
return errors.New("you should only 1 package")
}
pkg := loaded[0]
for _, file := range pkg.Syntax {
err = f(pkg.Name, file, pkg.TypesInfo, err)
}
return nil
}
type typeInfo interface {
TypeOf(e ast.Expr) types.Type
}
type walkFunc func(iface string, ifaceType *types.Interface, err error) error
func walk(node ast.Node, info typeInfo, f walkFunc) error {
var err error
ast.Inspect(node, func(node ast.Node) bool {
switch t := node.(type) {
case *ast.TypeSpec:
// only public
if t.Name.IsExported() {
switch v := t.Type.(type) {
case *ast.InterfaceType:
ifaceType, ok := info.TypeOf(v).Underlying().(*types.Interface)
if ok {
err = f(t.Name.Name, ifaceType, err)
}
}
}
}
return true
})
return err
}