// subpackages returns the set of packages in the given srcDir whose
// import paths start with dir.
func subpackages(ctxt *build.Context, srcDir string, dir string) map[string]bool {
subs := map[string]bool{dir: true}
// Find all packages under srcDir whose import paths start with dir.
buildutil.ForEachPackage(ctxt, func(pkg string, err error) {
if err != nil {
log.Fatalf("unexpected error in ForEachPackage: %v", err)
}
if !strings.HasPrefix(pkg, path.Join(dir, "")) {
return
}
p, err := ctxt.Import(pkg, "", build.FindOnly)
if err != nil {
log.Fatalf("unexpected: package %s can not be located by build context: %s", pkg, err)
}
if p.SrcRoot == "" {
log.Fatalf("unexpected: could not determine srcDir for package %s: %s", pkg, err)
}
if p.SrcRoot != srcDir {
return
}
subs[pkg] = true
})
return subs
}
// Builds scans the specified Go workspace and builds the forward and
// reverse import dependency graphs for all its packages.
// It also returns a mapping from import paths to errors for packages
// that could not be loaded.
func Build(ctxt *build.Context) (forward, reverse Graph, errors map[string]error) {
type importEdge struct {
from, to string
}
type pathError struct {
path string
err error
}
ch := make(chan interface{})
var wg sync.WaitGroup
buildutil.ForEachPackage(ctxt, func(path string, err error) {
wg.Add(1)
go func() {
defer wg.Done()
if err != nil {
ch <- pathError{path, err}
return
}
bp, err := ctxt.Import(path, "", 0)
if _, ok := err.(*build.NoGoError); ok {
return // empty directory is not an error
}
if err != nil {
ch <- pathError{path, err}
return
}
for _, imp := range bp.Imports {
ch <- importEdge{path, imp}
}
for _, imp := range bp.TestImports {
ch <- importEdge{path, imp}
}
for _, imp := range bp.XTestImports {
ch <- importEdge{path, imp}
}
}()
})
go func() {
wg.Wait()
close(ch)
}()
forward = make(Graph)
reverse = make(Graph)
for e := range ch {
switch e := e.(type) {
case pathError:
if errors == nil {
errors = make(map[string]error)
}
errors[e.path] = e.err
case importEdge:
if e.to == "C" {
continue // "C" is fake
}
forward.addEdge(e.from, e.to)
reverse.addEdge(e.to, e.from)
}
}
return forward, reverse, errors
}
// Build scans the specified Go workspace and builds the forward and
// reverse import dependency graphs for all its packages.
// It also returns a mapping from canonical import paths to errors for packages
// whose loading was not entirely successful.
// A package may appear in the graph and in the errors mapping.
// All package paths are canonical and may contain "/vendor/".
func Build(ctxt *build.Context) (forward, reverse Graph, errors map[string]error) {
type importEdge struct {
from, to string
}
type pathError struct {
path string
err error
}
ch := make(chan interface{})
go func() {
sema := make(chan int, 20) // I/O concurrency limiting semaphore
var wg sync.WaitGroup
buildutil.ForEachPackage(ctxt, func(path string, err error) {
if err != nil {
ch <- pathError{path, err}
return
}
wg.Add(1)
go func() {
defer wg.Done()
sema <- 1
bp, err := ctxt.Import(path, "", 0)
<-sema
if err != nil {
if _, ok := err.(*build.NoGoError); ok {
// empty directory is not an error
} else {
ch <- pathError{path, err}
}
// Even in error cases, Import usually returns a package.
}
// absolutize resolves an import path relative
// to the current package bp.
// The absolute form may contain "vendor".
//
// The vendoring feature slows down Build by 3×.
// Here are timings from a 1400 package workspace:
// 1100ms: current code (with vendor check)
// 880ms: with a nonblocking cache around ctxt.IsDir
// 840ms: nonblocking cache with duplicate suppression
// 340ms: original code (no vendor check)
// TODO(adonovan): optimize, somehow.
memo := make(map[string]string)
absolutize := func(path string) string {
canon, ok := memo[path]
if !ok {
sema <- 1
bp2, _ := ctxt.Import(path, bp.Dir, build.FindOnly)
<-sema
if bp2 != nil {
canon = bp2.ImportPath
} else {
canon = path
}
memo[path] = canon
}
return canon
}
if bp != nil {
for _, imp := range bp.Imports {
ch <- importEdge{path, absolutize(imp)}
}
for _, imp := range bp.TestImports {
ch <- importEdge{path, absolutize(imp)}
}
for _, imp := range bp.XTestImports {
ch <- importEdge{path, absolutize(imp)}
}
}
}()
})
wg.Wait()
close(ch)
}()
forward = make(Graph)
reverse = make(Graph)
for e := range ch {
switch e := e.(type) {
case pathError:
if errors == nil {
errors = make(map[string]error)
}
errors[e.path] = e.err
case importEdge:
if e.to == "C" {
continue // "C" is fake
}
forward.addEdge(e.from, e.to)
reverse.addEdge(e.to, e.from)
}
}
return forward, reverse, errors
}
func TestMoves(t *testing.T) {
tests := []struct {
ctxt *build.Context
from, to string
want map[string]string
}{
// Simple example.
{
ctxt: fakeContext(map[string][]string{
"foo": {`package foo; type T int`},
"main": {`package main
import "foo"
var _ foo.T
`},
}),
from: "foo", to: "bar",
want: map[string]string{
"/go/src/main/0.go": `package main
import "bar"
var _ bar.T
`,
"/go/src/bar/0.go": `package bar
type T int
`,
},
},
// Example with subpackage.
{
ctxt: fakeContext(map[string][]string{
"foo": {`package foo; type T int`},
"foo/sub": {`package sub; type T int`},
"main": {`package main
import "foo"
import "foo/sub"
var _ foo.T
var _ sub.T
`},
}),
from: "foo", to: "bar",
want: map[string]string{
"/go/src/main/0.go": `package main
import "bar"
import "bar/sub"
var _ bar.T
var _ sub.T
`,
"/go/src/bar/0.go": `package bar
type T int
`,
"/go/src/bar/sub/0.go": `package sub; type T int`,
},
},
// References into subpackages
{
ctxt: fakeContext(map[string][]string{
"foo": {`package foo; import "foo/a"; var _ a.T`},
"foo/a": {`package a; type T int`},
"foo/b": {`package b; import "foo/a"; var _ a.T`},
}),
from: "foo", to: "bar",
want: map[string]string{
"/go/src/bar/0.go": `package bar
import "bar/a"
var _ a.T
`,
"/go/src/bar/a/0.go": `package a; type T int`,
"/go/src/bar/b/0.go": `package b
import "bar/a"
var _ a.T
`,
},
},
// External test packages
{
ctxt: buildutil.FakeContext(map[string]map[string]string{
"foo": {
"0.go": `package foo; type T int`,
"0_test.go": `package foo_test; import "foo"; var _ foo.T`,
},
"baz": {
"0_test.go": `package baz_test; import "foo"; var _ foo.T`,
},
}),
from: "foo", to: "bar",
want: map[string]string{
"/go/src/bar/0.go": `package bar
type T int
`,
"/go/src/bar/0_test.go": `package bar_test
import "bar"
var _ bar.T
`,
"/go/src/baz/0_test.go": `package baz_test
import "bar"
var _ bar.T
`,
},
},
}
for _, test := range tests {
ctxt := test.ctxt
got := make(map[string]string)
// Populate got with starting file set. rewriteFile and moveDirectory
// will mutate got to produce resulting file set.
buildutil.ForEachPackage(ctxt, func(importPath string, err error) {
if err != nil {
return
}
path := filepath.Join("/go/src", importPath, "0.go")
if !buildutil.FileExists(ctxt, path) {
return
}
f, err := ctxt.OpenFile(path)
if err != nil {
t.Errorf("unexpected error opening file: %s", err)
return
}
bytes, err := ioutil.ReadAll(f)
f.Close()
if err != nil {
t.Errorf("unexpected error reading file: %s", err)
return
}
got[path] = string(bytes)
})
rewriteFile = func(fset *token.FileSet, f *ast.File, orig string) error {
var out bytes.Buffer
if err := format.Node(&out, fset, f); err != nil {
return err
}
got[orig] = out.String()
return nil
}
moveDirectory = func(from, to string) error {
for path, contents := range got {
if strings.HasPrefix(path, from) {
newPath := strings.Replace(path, from, to, 1)
delete(got, path)
got[newPath] = contents
}
}
return nil
}
err := Move(ctxt, test.from, test.to, "")
prefix := fmt.Sprintf("-from %q -to %q", test.from, test.to)
if err != nil {
t.Errorf("%s: unexpected error: %s", prefix, err)
continue
}
for file, wantContent := range test.want {
k := filepath.FromSlash(file)
gotContent, ok := got[k]
delete(got, k)
if !ok {
// TODO(matloob): some testcases might have files that won't be
// rewritten
t.Errorf("%s: file %s not rewritten", prefix, file)
continue
}
if gotContent != wantContent {
t.Errorf("%s: rewritten file %s does not match expectation; got <<<%s>>>\n"+
"want <<<%s>>>", prefix, file, gotContent, wantContent)
}
}
// got should now be empty
for file := range got {
t.Errorf("%s: unexpected rewrite of file %s", prefix, file)
}
}
}
// Builds scans the specified Go workspace and builds the forward and
// reverse import dependency graphs for all its packages.
// It also returns a mapping from import paths to errors for packages
// that could not be loaded.
func Build(ctxt *build.Context) (forward, reverse Graph, errors map[string]error) {
// The (sole) graph builder goroutine receives a stream of import
// edges from the package loading goroutine.
forward = make(Graph)
reverse = make(Graph)
edgec := make(chan [2]string)
go func() {
for edge := range edgec {
if edge[1] == "C" {
continue // "C" is fake
}
forward.addEdge(edge[0], edge[1])
reverse.addEdge(edge[1], edge[0])
}
}()
// The (sole) error goroutine receives a stream of ReadDir and
// Import errors.
type pathError struct {
path string
err error
}
errorc := make(chan pathError)
go func() {
for e := range errorc {
if errors == nil {
errors = make(map[string]error)
}
errors[e.path] = e.err
}
}()
var wg sync.WaitGroup
buildutil.ForEachPackage(ctxt, func(path string, err error) {
if err != nil {
errorc <- pathError{path, err}
return
}
wg.Add(1)
// The import goroutines load the metadata for each package.
go func(path string) {
defer wg.Done()
bp, err := ctxt.Import(path, "", 0)
if _, ok := err.(*build.NoGoError); ok {
return // empty directory is not an error
}
if err != nil {
errorc <- pathError{path, err}
return
}
for _, imp := range bp.Imports {
edgec <- [2]string{path, imp}
}
for _, imp := range bp.TestImports {
edgec <- [2]string{path, imp}
}
for _, imp := range bp.XTestImports {
edgec <- [2]string{path, imp}
}
}(path)
})
wg.Wait()
close(edgec)
close(errorc)
return forward, reverse, errors
}
func (w *PkgWalker) LookupObjects(conf *PkgConfig, cursor *FileCursor) {
var cursorObj types.Object
var cursorSelection *types.Selection
var cursorObjIsDef bool
//lookup defs
var pkg *types.Package
var pkgInfo *types.Info
if cursor.xtest {
pkgInfo = conf.XInfo
pkg = conf.XPkg
} else {
pkgInfo = conf.Info
pkg = conf.Pkg
}
_ = cursorObjIsDef
if cursorObj == nil {
for sel, obj := range pkgInfo.Selections {
if cursor.pos >= sel.Sel.Pos() && cursor.pos <= sel.Sel.End() {
cursorObj = obj.Obj()
cursorSelection = obj
break
}
}
}
if cursorObj == nil {
for id, obj := range pkgInfo.Defs {
if cursor.pos >= id.Pos() && cursor.pos <= id.End() {
cursorObj = obj
cursorObjIsDef = true
break
}
}
}
_ = cursorSelection
if cursorObj == nil {
for id, obj := range pkgInfo.Uses {
if cursor.pos >= id.Pos() && cursor.pos <= id.End() {
cursorObj = obj
break
}
}
}
if cursorObj == nil {
return
}
kind, err := parserObjKind(cursorObj)
if err != nil {
log.Fatalln(err)
}
if kind == ObjField {
if cursorObj.(*types.Var).Anonymous() {
typ := orgType(cursorObj.Type())
if named, ok := typ.(*types.Named); ok {
cursorObj = named.Obj()
}
}
}
cursorPkg := cursorObj.Pkg()
cursorPos := cursorObj.Pos()
//var fieldTypeInfo *types.Info
var fieldTypeObj types.Object
// if cursorPkg == pkg {
// fieldTypeInfo = pkgInfo
// }
cursorIsInterfaceMethod := false
var cursorInterfaceTypeName string
if kind == ObjMethod && cursorSelection != nil && cursorSelection.Recv() != nil {
sig := cursorObj.(*types.Func).Type().Underlying().(*types.Signature)
if _, ok := sig.Recv().Type().Underlying().(*types.Interface); ok {
if named, ok := cursorSelection.Recv().(*types.Named); ok {
obj, typ := w.lookupNamedMethod(named, cursorObj.Name())
if obj != nil {
cursorObj = obj
}
if typ != nil {
cursorPkg = typ.Obj().Pkg()
cursorInterfaceTypeName = typ.Obj().Name()
}
cursorIsInterfaceMethod = true
}
}
} else if kind == ObjField && cursorSelection != nil {
if recv := cursorSelection.Recv(); recv != nil {
typ := orgType(recv)
if typ != nil {
if name, ok := typ.(*types.Named); ok {
fieldTypeObj = name.Obj()
na := w.lookupNamedField(name, cursorObj.Name())
if na != nil {
fieldTypeObj = na.Obj()
}
}
}
}
}
if cursorPkg != nil && cursorPkg != pkg &&
kind != ObjPkgName && w.isBinaryPkg(cursorPkg.Path()) {
conf := &PkgConfig{
IgnoreFuncBodies: true,
AllowBinary: true,
WithTestFiles: true,
Info: &types.Info{
Defs: make(map[*ast.Ident]types.Object),
},
}
pkg, _ := w.Import("", cursorPkg.Path(), conf)
if pkg != nil {
if cursorIsInterfaceMethod {
for _, obj := range conf.Info.Defs {
if obj == nil {
continue
}
if fn, ok := obj.(*types.Func); ok {
if fn.Name() == cursorObj.Name() {
if sig, ok := fn.Type().Underlying().(*types.Signature); ok {
if named, ok := sig.Recv().Type().(*types.Named); ok {
if named.Obj() != nil && named.Obj().Name() == cursorInterfaceTypeName {
cursorPos = obj.Pos()
break
}
}
}
}
}
}
} else if kind == ObjField && fieldTypeObj != nil {
for _, obj := range conf.Info.Defs {
if obj == nil {
continue
}
if _, ok := obj.(*types.TypeName); ok {
if IsSameObject(fieldTypeObj, obj) {
if t, ok := obj.Type().Underlying().(*types.Struct); ok {
for i := 0; i < t.NumFields(); i++ {
if t.Field(i).Id() == cursorObj.Id() {
cursorPos = t.Field(i).Pos()
break
}
}
}
break
}
}
}
} else {
for k, v := range conf.Info.Defs {
if k != nil && v != nil && IsSameObject(v, cursorObj) {
cursorPos = k.Pos()
break
}
}
}
}
// if kind == ObjField || cursorIsInterfaceMethod {
// fieldTypeInfo = conf.Info
// }
}
// if kind == ObjField {
// fieldTypeObj = w.LookupStructFromField(fieldTypeInfo, cursorPkg, cursorObj, cursorPos)
// }
if typesFindDef {
fmt.Println(w.fset.Position(cursorPos))
}
if typesFindInfo {
if kind == ObjField && fieldTypeObj != nil {
typeName := fieldTypeObj.Name()
if fieldTypeObj.Pkg() != nil && fieldTypeObj.Pkg() != pkg {
typeName = fieldTypeObj.Pkg().Name() + "." + fieldTypeObj.Name()
}
fmt.Println(typeName, simpleObjInfo(cursorObj))
} else if kind == ObjBuiltin {
fmt.Println(builtinInfo(cursorObj.Name()))
} else if kind == ObjPkgName {
fmt.Println(cursorObj.String())
} else if cursorIsInterfaceMethod {
fmt.Println(strings.Replace(simpleObjInfo(cursorObj), "(interface)", cursorPkg.Name()+"."+cursorInterfaceTypeName, 1))
} else {
fmt.Println(simpleObjInfo(cursorObj))
}
}
if typesFindDoc && typesFindDef {
pos := w.fset.Position(cursorPos)
file := w.parsedFileCache[pos.Filename]
if file != nil {
line := pos.Line
var group *ast.CommentGroup
for _, v := range file.Comments {
lastLine := w.fset.Position(v.End()).Line
if lastLine == line || lastLine == line-1 {
group = v
} else if lastLine > line {
break
}
}
if group != nil {
fmt.Println(group.Text())
}
}
}
if !typesFindUse {
return
}
var usages []int
if kind == ObjPkgName {
for id, obj := range pkgInfo.Uses {
if obj != nil && obj.Id() == cursorObj.Id() { //!= nil && cursorObj.Pos() == obj.Pos() {
usages = append(usages, int(id.Pos()))
}
}
} else {
// for id, obj := range pkgInfo.Defs {
// if obj == cursorObj { //!= nil && cursorObj.Pos() == obj.Pos() {
// usages = append(usages, int(id.Pos()))
// }
// }
for id, obj := range pkgInfo.Uses {
if obj == cursorObj { //!= nil && cursorObj.Pos() == obj.Pos() {
usages = append(usages, int(id.Pos()))
}
}
}
var pkg_path string
var xpkg_path string
if conf.Pkg != nil {
pkg_path = conf.Pkg.Path()
}
if conf.XPkg != nil {
xpkg_path = conf.XPkg.Path()
}
if cursorPkg != nil &&
(cursorPkg.Path() == pkg_path || cursorPkg.Path() == xpkg_path) &&
kind != ObjPkgName {
usages = append(usages, int(cursorPos))
}
(sort.IntSlice(usages)).Sort()
for _, pos := range usages {
fmt.Println(w.fset.Position(token.Pos(pos)))
}
//check look for current pkg.object on pkg_test
if typesFindUseAll || IsSamePkg(cursorPkg, conf.Pkg) {
var addInfo *types.Info
if conf.Cursor.xtest {
addInfo = conf.Info
} else {
addInfo = conf.XInfo
}
if addInfo != nil && cursorPkg != nil {
var usages []int
// for id, obj := range addInfo.Defs {
// if id != nil && obj != nil && obj.Id() == cursorObj.Id() {
// usages = append(usages, int(id.Pos()))
// }
// }
for k, v := range addInfo.Uses {
if k != nil && v != nil && IsSameObject(v, cursorObj) {
usages = append(usages, int(k.Pos()))
}
}
(sort.IntSlice(usages)).Sort()
for _, pos := range usages {
fmt.Println(w.fset.Position(token.Pos(pos)))
}
}
}
if !typesFindUseAll {
return
}
if cursorPkg == nil {
return
}
var find_def_pkg string
var uses_paths []string
if cursorPkg.Path() != pkg_path && cursorPkg.Path() != xpkg_path {
find_def_pkg = cursorPkg.Path()
uses_paths = append(uses_paths, cursorPkg.Path())
}
buildutil.ForEachPackage(&build.Default, func(importPath string, err error) {
if err != nil {
return
}
if importPath == conf.Pkg.Path() {
return
}
bp, err := w.importPath(importPath, 0)
if err != nil {
return
}
find := false
if bp.ImportPath == cursorPkg.Path() {
find = true
} else {
for _, v := range bp.Imports {
if v == cursorObj.Pkg().Path() {
find = true
break
}
}
}
if find {
for _, v := range uses_paths {
if v == bp.ImportPath {
return
}
}
uses_paths = append(uses_paths, bp.ImportPath)
}
})
w.imported = make(map[string]*types.Package)
for _, v := range uses_paths {
conf := &PkgConfig{
IgnoreFuncBodies: false,
AllowBinary: true,
WithTestFiles: true,
Info: &types.Info{
Uses: make(map[*ast.Ident]types.Object),
},
XInfo: &types.Info{
Uses: make(map[*ast.Ident]types.Object),
},
}
w.imported[v] = nil
var usages []int
vpkg, _ := w.Import("", v, conf)
if vpkg != nil && vpkg != pkg {
if conf.Info != nil {
for k, v := range conf.Info.Uses {
if k != nil && v != nil && IsSameObject(v, cursorObj) {
usages = append(usages, int(k.Pos()))
}
}
}
if conf.XInfo != nil {
for k, v := range conf.XInfo.Uses {
if k != nil && v != nil && IsSameObject(v, cursorObj) {
usages = append(usages, int(k.Pos()))
}
}
}
}
if v == find_def_pkg {
usages = append(usages, int(cursorPos))
}
(sort.IntSlice(usages)).Sort()
for _, pos := range usages {
fmt.Println(w.fset.Position(token.Pos(pos)))
}
}
}
func TestMoves(t *testing.T) {
if runtime.GOOS == "windows" {
t.Skip("broken on Windows; see golang.org/issue/16384")
}
tests := []struct {
ctxt *build.Context
from, to string
want map[string]string
wantWarnings []string
}{
// Simple example.
{
ctxt: fakeContext(map[string][]string{
"foo": {`package foo; type T int`},
"main": {`package main
import "foo"
var _ foo.T
`},
}),
from: "foo", to: "bar",
want: map[string]string{
"/go/src/main/0.go": `package main
import "bar"
var _ bar.T
`,
"/go/src/bar/0.go": `package bar
type T int
`,
},
},
// Example with subpackage.
{
ctxt: fakeContext(map[string][]string{
"foo": {`package foo; type T int`},
"foo/sub": {`package sub; type T int`},
"main": {`package main
import "foo"
import "foo/sub"
var _ foo.T
var _ sub.T
`},
}),
from: "foo", to: "bar",
want: map[string]string{
"/go/src/main/0.go": `package main
import "bar"
import "bar/sub"
var _ bar.T
var _ sub.T
`,
"/go/src/bar/0.go": `package bar
type T int
`,
"/go/src/bar/sub/0.go": `package sub; type T int`,
},
},
// References into subpackages
{
ctxt: fakeContext(map[string][]string{
"foo": {`package foo; import "foo/a"; var _ a.T`},
"foo/a": {`package a; type T int`},
"foo/b": {`package b; import "foo/a"; var _ a.T`},
}),
from: "foo", to: "bar",
want: map[string]string{
"/go/src/bar/0.go": `package bar
import "bar/a"
var _ a.T
`,
"/go/src/bar/a/0.go": `package a; type T int`,
"/go/src/bar/b/0.go": `package b
import "bar/a"
var _ a.T
`,
},
},
// External test packages
{
ctxt: buildutil.FakeContext(map[string]map[string]string{
"foo": {
"0.go": `package foo; type T int`,
"0_test.go": `package foo_test; import "foo"; var _ foo.T`,
},
"baz": {
"0_test.go": `package baz_test; import "foo"; var _ foo.T`,
},
}),
from: "foo", to: "bar",
want: map[string]string{
"/go/src/bar/0.go": `package bar
type T int
`,
"/go/src/bar/0_test.go": `package bar_test
import "bar"
var _ bar.T
`,
"/go/src/baz/0_test.go": `package baz_test
import "bar"
var _ bar.T
`,
},
},
// package import comments
{
ctxt: fakeContext(map[string][]string{"foo": {`package foo // import "baz"`}}),
from: "foo", to: "bar",
want: map[string]string{"/go/src/bar/0.go": `package bar // import "bar"
`},
},
{
ctxt: fakeContext(map[string][]string{"foo": {`package foo /* import "baz" */`}}),
from: "foo", to: "bar",
want: map[string]string{"/go/src/bar/0.go": `package bar /* import "bar" */
`},
},
{
ctxt: fakeContext(map[string][]string{"foo": {`package foo // import "baz"`}}),
from: "foo", to: "bar",
want: map[string]string{"/go/src/bar/0.go": `package bar // import "bar"
`},
},
{
ctxt: fakeContext(map[string][]string{"foo": {`package foo
// import " this is not an import comment`}}),
from: "foo", to: "bar",
want: map[string]string{"/go/src/bar/0.go": `package bar
// import " this is not an import comment
`},
},
{
ctxt: fakeContext(map[string][]string{"foo": {`package foo
/* import " this is not an import comment */`}}),
from: "foo", to: "bar",
want: map[string]string{"/go/src/bar/0.go": `package bar
/* import " this is not an import comment */
`},
},
// Import name conflict generates a warning, not an error.
{
ctxt: fakeContext(map[string][]string{
"x": {},
"a": {`package a; type A int`},
"b": {`package b; type B int`},
"conflict": {`package conflict
import "a"
import "b"
var _ a.A
var _ b.B
`},
"ok": {`package ok
import "b"
var _ b.B
`},
}),
from: "b", to: "x/a",
want: map[string]string{
"/go/src/a/0.go": `package a; type A int`,
"/go/src/ok/0.go": `package ok
import "x/a"
var _ a.B
`,
"/go/src/conflict/0.go": `package conflict
import "a"
import "x/a"
var _ a.A
var _ b.B
`,
"/go/src/x/a/0.go": `package a
type B int
`,
},
wantWarnings: []string{
`/go/src/conflict/0.go:4:8: renaming this imported package name "b" to "a"`,
`/go/src/conflict/0.go:3:8: conflicts with imported package name in same block`,
`/go/src/conflict/0.go:3:8: skipping update of this file`,
},
},
// Rename with same base name.
{
ctxt: fakeContext(map[string][]string{
"x": {},
"y": {},
"x/foo": {`package foo
type T int
`},
"main": {`package main; import "x/foo"; var _ foo.T`},
}),
from: "x/foo", to: "y/foo",
want: map[string]string{
"/go/src/y/foo/0.go": `package foo
type T int
`,
"/go/src/main/0.go": `package main
import "y/foo"
var _ foo.T
`,
},
},
}
for _, test := range tests {
ctxt := test.ctxt
got := make(map[string]string)
// Populate got with starting file set. rewriteFile and moveDirectory
// will mutate got to produce resulting file set.
buildutil.ForEachPackage(ctxt, func(importPath string, err error) {
if err != nil {
return
}
path := filepath.Join("/go/src", importPath, "0.go")
if !buildutil.FileExists(ctxt, path) {
return
}
f, err := ctxt.OpenFile(path)
if err != nil {
t.Errorf("unexpected error opening file: %s", err)
return
}
bytes, err := ioutil.ReadAll(f)
f.Close()
if err != nil {
t.Errorf("unexpected error reading file: %s", err)
return
}
got[path] = string(bytes)
})
var warnings []string
reportError = func(posn token.Position, message string) {
warning := fmt.Sprintf("%s:%d:%d: %s",
filepath.ToSlash(posn.Filename), // for MS Windows
posn.Line,
posn.Column,
message)
warnings = append(warnings, warning)
}
writeFile = func(filename string, content []byte) error {
got[filename] = string(content)
return nil
}
moveDirectory = func(from, to string) error {
for path, contents := range got {
if strings.HasPrefix(path, from) {
newPath := strings.Replace(path, from, to, 1)
delete(got, path)
got[newPath] = contents
}
}
return nil
}
err := Move(ctxt, test.from, test.to, "")
prefix := fmt.Sprintf("-from %q -to %q", test.from, test.to)
if err != nil {
t.Errorf("%s: unexpected error: %s", prefix, err)
continue
}
if !reflect.DeepEqual(warnings, test.wantWarnings) {
t.Errorf("%s: unexpected warnings:\n%s\nwant:\n%s",
prefix,
strings.Join(warnings, "\n"),
strings.Join(test.wantWarnings, "\n"))
}
for file, wantContent := range test.want {
k := filepath.FromSlash(file)
gotContent, ok := got[k]
delete(got, k)
if !ok {
// TODO(matloob): some testcases might have files that won't be
// rewritten
t.Errorf("%s: file %s not rewritten", prefix, file)
continue
}
if gotContent != wantContent {
t.Errorf("%s: rewritten file %s does not match expectation; got <<<%s>>>\n"+
"want <<<%s>>>", prefix, file, gotContent, wantContent)
}
}
// got should now be empty
for file := range got {
t.Errorf("%s: unexpected rewrite of file %s", prefix, file)
}
}
}
