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// Copyright 2015 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package main
import (
"go/ast"
"strconv"
)
func init() {
register(gotypesFix)
}
var gotypesFix = fix{
name: "gotypes",
date: "2015-07-16",
f: gotypes,
desc: `Change imports of golang.org/x/tools/go/{exact,types} to go/{constant,types}`,
}
func gotypes(f *ast.File) bool {
fixed := fixGoTypes(f)
if fixGoExact(f) {
fixed = true
}
return fixed
}
func fixGoTypes(f *ast.File) bool {
return rewriteImport(f, "golang.org/x/tools/go/types", "go/types")
}
func fixGoExact(f *ast.File) bool {
// This one is harder because the import name changes.
// First find the import spec.
var importSpec *ast.ImportSpec
walk(f, func(n interface{}) {
if importSpec != nil {
return
}
spec, ok := n.(*ast.ImportSpec)
if !ok {
return
}
path, err := strconv.Unquote(spec.Path.Value)
if err != nil {
return
}
if path == "golang.org/x/tools/go/exact" {
importSpec = spec
}
})
if importSpec == nil {
return false
}
// We are about to rename exact.* to constant.*, but constant is a common
// name. See if it will conflict. This is a hack but it is effective.
exists := renameTop(f, "constant", "constant")
suffix := ""
if exists {
suffix = "_"
}
// Now we need to rename all the uses of the import. RewriteImport
// affects renameTop, but not vice versa, so do them in this order.
renameTop(f, "exact", "constant"+suffix)
rewriteImport(f, "golang.org/x/tools/go/exact", "go/constant")
// renameTop will also rewrite the imported package name. Fix that;
// we know it should be missing.
importSpec.Name = nil
return true
}
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