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go / tools / 434f7a8fef20980f5030380dbfe8388b63ff7c7a / . / go / packages / packages_test.go
blob: f3bf68a9a041aef6da9a7781122f9b53ef0bbcb5 [file] [log] [blame]
// Copyright 2018 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 packages_test
import (
"bytes"
"context"
"encoding/json"
"flag"
"fmt"
"go/ast"
constantpkg "go/constant"
"go/parser"
"go/token"
"go/types"
"io/ioutil"
"os"
"path/filepath"
"reflect"
"runtime"
"sort"
"strings"
"testing"
"time"
"golang.org/x/tools/go/packages"
"golang.org/x/tools/go/packages/packagestest"
"golang.org/x/tools/internal/packagesinternal"
"golang.org/x/tools/internal/testenv"
)
// testCtx is canceled when the test binary is about to time out.
//
// If https://golang.org/issue/28135 is accepted, uses of this variable in test
// functions should be replaced by t.Context().
var testCtx = context.Background()
func TestMain(m *testing.M) {
testenv.ExitIfSmallMachine()
timeoutFlag := flag.Lookup("test.timeout")
if timeoutFlag != nil {
if d := timeoutFlag.Value.(flag.Getter).Get().(time.Duration); d != 0 {
aBitShorter := d * 95 / 100
var cancel context.CancelFunc
testCtx, cancel = context.WithTimeout(testCtx, aBitShorter)
defer cancel()
}
}
os.Exit(m.Run())
}
// TODO(adonovan): more test cases to write:
//
// - When the tests fail, make them print a 'cd & load' command
// that will allow the maintainer to interact with the failing scenario.
// - errors in go-list metadata
// - a foo.test package that cannot be built for some reason (e.g.
// import error) will result in a JSON blob with no name and a
// nonexistent testmain file in GoFiles. Test that we handle this
// gracefully.
// - test more Flags.
//
// LoadSyntax & LoadAllSyntax modes:
// - Fset may be user-supplied or not.
// - Packages.Info is correctly set.
// - typechecker configuration is honored
// - import cycles are gracefully handled in type checker.
// - test typechecking of generated test main and cgo.
// The zero-value of Config has LoadFiles mode.
func TestLoadZeroConfig(t *testing.T) {
testenv.NeedsGoPackages(t)
initial, err := packages.Load(nil, "hash")
if err != nil {
t.Fatal(err)
}
if len(initial) != 1 {
t.Fatalf("got %s, want [hash]", initial)
}
hash := initial[0]
// Even though the hash package has imports,
// they are not reported.
got := fmt.Sprintf("iamashamedtousethedisabledqueryname=%s srcs=%v imports=%v", hash.Name, srcs(hash), hash.Imports)
want := "iamashamedtousethedisabledqueryname=hash srcs=[hash.go] imports=map[]"
if got != want {
t.Fatalf("got %s, want %s", got, want)
}
}
func TestLoadImportsGraph(t *testing.T) { packagestest.TestAll(t, testLoadImportsGraph) }
func testLoadImportsGraph(t *testing.T, exporter packagestest.Exporter) {
exported := packagestest.Export(t, exporter, []packagestest.Module{{
Name: "golang.org/fake",
Files: map[string]interface{}{
"a/a.go": `package a; const A = 1`,
"b/b.go": `package b; import ("golang.org/fake/a"; _ "container/list"); var B = a.A`,
"c/c.go": `package c; import (_ "golang.org/fake/b"; _ "unsafe")`,
"c/c2.go": "// +build ignore\n\n" + `package c; import _ "fmt"`,
"subdir/d/d.go": `package d`,
"subdir/d/d_test.go": `package d; import _ "math/bits"`,
"subdir/d/x_test.go": `package d_test; import _ "golang.org/fake/subdir/d"`, // TODO(adonovan): test bad import here
"subdir/e/d.go": `package e`,
"e/e.go": `package main; import _ "golang.org/fake/b"`,
"e/e2.go": `package main; import _ "golang.org/fake/c"`,
"f/f.go": `package f`,
}}})
defer exported.Cleanup()
exported.Config.Mode = packages.LoadImports
initial, err := packages.Load(exported.Config, "golang.org/fake/c", "golang.org/fake/subdir/d", "golang.org/fake/e")
if err != nil {
t.Fatal(err)
}
// Check graph topology.
graph, _ := importGraph(initial)
wantGraph := `
container/list
golang.org/fake/a
golang.org/fake/b
* golang.org/fake/c
* golang.org/fake/e
* golang.org/fake/subdir/d
* golang.org/fake/subdir/d [golang.org/fake/subdir/d.test]
* golang.org/fake/subdir/d.test
* golang.org/fake/subdir/d_test [golang.org/fake/subdir/d.test]
math/bits
unsafe
golang.org/fake/b -> container/list
golang.org/fake/b -> golang.org/fake/a
golang.org/fake/c -> golang.org/fake/b
golang.org/fake/c -> unsafe
golang.org/fake/e -> golang.org/fake/b
golang.org/fake/e -> golang.org/fake/c
golang.org/fake/subdir/d [golang.org/fake/subdir/d.test] -> math/bits
golang.org/fake/subdir/d.test -> golang.org/fake/subdir/d [golang.org/fake/subdir/d.test]
golang.org/fake/subdir/d.test -> golang.org/fake/subdir/d_test [golang.org/fake/subdir/d.test]
golang.org/fake/subdir/d_test [golang.org/fake/subdir/d.test] -> golang.org/fake/subdir/d [golang.org/fake/subdir/d.test]
`[1:]
if graph != wantGraph {
t.Errorf("wrong import graph: got <<%s>>, want <<%s>>", graph, wantGraph)
}
exported.Config.Tests = true
initial, err = packages.Load(exported.Config, "golang.org/fake/c", "golang.org/fake/subdir/d", "golang.org/fake/e")
if err != nil {
t.Fatal(err)
}
// Check graph topology.
graph, all := importGraph(initial)
wantGraph = `
container/list
golang.org/fake/a
golang.org/fake/b
* golang.org/fake/c
* golang.org/fake/e
* golang.org/fake/subdir/d
* golang.org/fake/subdir/d [golang.org/fake/subdir/d.test]
* golang.org/fake/subdir/d.test
* golang.org/fake/subdir/d_test [golang.org/fake/subdir/d.test]
math/bits
unsafe
golang.org/fake/b -> container/list
golang.org/fake/b -> golang.org/fake/a
golang.org/fake/c -> golang.org/fake/b
golang.org/fake/c -> unsafe
golang.org/fake/e -> golang.org/fake/b
golang.org/fake/e -> golang.org/fake/c
golang.org/fake/subdir/d [golang.org/fake/subdir/d.test] -> math/bits
golang.org/fake/subdir/d.test -> golang.org/fake/subdir/d [golang.org/fake/subdir/d.test]
golang.org/fake/subdir/d.test -> golang.org/fake/subdir/d_test [golang.org/fake/subdir/d.test]
golang.org/fake/subdir/d_test [golang.org/fake/subdir/d.test] -> golang.org/fake/subdir/d [golang.org/fake/subdir/d.test]
`[1:]
if graph != wantGraph {
t.Errorf("wrong import graph: got <<%s>>, want <<%s>>", graph, wantGraph)
}
// Check node information: kind, name, srcs.
for _, test := range []struct {
id string
wantName string
wantKind string
wantSrcs string
}{
{"golang.org/fake/a", "a", "package", "a.go"},
{"golang.org/fake/b", "b", "package", "b.go"},
{"golang.org/fake/c", "c", "package", "c.go"}, // c2.go is ignored
{"golang.org/fake/e", "main", "command", "e.go e2.go"},
{"container/list", "list", "package", "list.go"},
{"golang.org/fake/subdir/d", "d", "package", "d.go"},
{"golang.org/fake/subdir/d.test", "main", "command", "0.go"},
{"unsafe", "unsafe", "package", ""},
} {
p, ok := all[test.id]
if !ok {
t.Errorf("no package %s", test.id)
continue
}
if p.Name != test.wantName {
t.Errorf("%s.Name = %q, want %q", test.id, p.Name, test.wantName)
}
// kind
var kind string
if p.Name == "main" {
kind += "command"
} else {
kind += "package"
}
if kind != test.wantKind {
t.Errorf("%s.Kind = %q, want %q", test.id, kind, test.wantKind)
}
if srcs := strings.Join(srcs(p), " "); srcs != test.wantSrcs {
t.Errorf("%s.Srcs = [%s], want [%s]", test.id, srcs, test.wantSrcs)
}
}
// Test an ad-hoc package, analogous to "go run hello.go".
if initial, err := packages.Load(exported.Config, exported.File("golang.org/fake", "c/c.go")); len(initial) == 0 {
t.Errorf("failed to obtain metadata for ad-hoc package: %s", err)
} else {
got := fmt.Sprintf("%s %s", initial[0].ID, srcs(initial[0]))
if want := "command-line-arguments [c.go]"; got != want {
t.Errorf("oops: got %s, want %s", got, want)
}
}
// Wildcards
// See StdlibTest for effective test of "std" wildcard.
// TODO(adonovan): test "all" returns everything in the current module.
{
// "..." (subdirectory)
initial, err = packages.Load(exported.Config, "golang.org/fake/subdir/...")
if err != nil {
t.Fatal(err)
}
graph, _ = importGraph(initial)
wantGraph = `
* golang.org/fake/subdir/d
* golang.org/fake/subdir/d [golang.org/fake/subdir/d.test]
* golang.org/fake/subdir/d.test
* golang.org/fake/subdir/d_test [golang.org/fake/subdir/d.test]
* golang.org/fake/subdir/e
math/bits
golang.org/fake/subdir/d [golang.org/fake/subdir/d.test] -> math/bits
golang.org/fake/subdir/d.test -> golang.org/fake/subdir/d [golang.org/fake/subdir/d.test]
golang.org/fake/subdir/d.test -> golang.org/fake/subdir/d_test [golang.org/fake/subdir/d.test]
golang.org/fake/subdir/d_test [golang.org/fake/subdir/d.test] -> golang.org/fake/subdir/d [golang.org/fake/subdir/d.test]
`[1:]
if graph != wantGraph {
t.Errorf("wrong import graph: got <<%s>>, want <<%s>>", graph, wantGraph)
}
}
}
func TestLoadImportsTestVariants(t *testing.T) { packagestest.TestAll(t, testLoadImportsTestVariants) }
func testLoadImportsTestVariants(t *testing.T, exporter packagestest.Exporter) {
exported := packagestest.Export(t, exporter, []packagestest.Module{{
Name: "golang.org/fake",
Files: map[string]interface{}{
"a/a.go": `package a; import _ "golang.org/fake/b"`,
"b/b.go": `package b`,
"b/b_test.go": `package b`,
"b/bx_test.go": `package b_test; import _ "golang.org/fake/a"`,
}}})
defer exported.Cleanup()
exported.Config.Mode = packages.LoadImports
exported.Config.Tests = true
initial, err := packages.Load(exported.Config, "golang.org/fake/a", "golang.org/fake/b")
if err != nil {
t.Fatal(err)
}
// Check graph topology.
graph, _ := importGraph(initial)
wantGraph := `
* golang.org/fake/a
golang.org/fake/a [golang.org/fake/b.test]
* golang.org/fake/b
* golang.org/fake/b [golang.org/fake/b.test]
* golang.org/fake/b.test
* golang.org/fake/b_test [golang.org/fake/b.test]
golang.org/fake/a -> golang.org/fake/b
golang.org/fake/a [golang.org/fake/b.test] -> golang.org/fake/b [golang.org/fake/b.test]
golang.org/fake/b.test -> golang.org/fake/b [golang.org/fake/b.test]
golang.org/fake/b.test -> golang.org/fake/b_test [golang.org/fake/b.test]
golang.org/fake/b_test [golang.org/fake/b.test] -> golang.org/fake/a [golang.org/fake/b.test]
`[1:]
if graph != wantGraph {
t.Errorf("wrong import graph: got <<%s>>, want <<%s>>", graph, wantGraph)
}
}
func TestLoadAbsolutePath(t *testing.T) {
exported := packagestest.Export(t, packagestest.GOPATH, []packagestest.Module{{
Name: "golang.org/gopatha",
Files: map[string]interface{}{
"a/a.go": `package a`,
}}, {
Name: "golang.org/gopathb",
Files: map[string]interface{}{
"b/b.go": `package b`,
}}})
defer exported.Cleanup()
initial, err := packages.Load(exported.Config, filepath.Dir(exported.File("golang.org/gopatha", "a/a.go")), filepath.Dir(exported.File("golang.org/gopathb", "b/b.go")))
if err != nil {
t.Fatalf("failed to load imports: %v", err)
}
got := []string{}
for _, p := range initial {
got = append(got, p.ID)
}
sort.Strings(got)
want := []string{"golang.org/gopatha/a", "golang.org/gopathb/b"}
if !reflect.DeepEqual(got, want) {
t.Fatalf("initial packages loaded: got [%s], want [%s]", got, want)
}
}
func TestVendorImports(t *testing.T) {
exported := packagestest.Export(t, packagestest.GOPATH, []packagestest.Module{{
Name: "golang.org/fake",
Files: map[string]interface{}{
"a/a.go": `package a; import _ "b"; import _ "golang.org/fake/c";`,
"a/vendor/b/b.go": `package b; import _ "golang.org/fake/c"`,
"c/c.go": `package c; import _ "b"`,
"c/vendor/b/b.go": `package b`,
}}})
defer exported.Cleanup()
exported.Config.Mode = packages.LoadImports
initial, err := packages.Load(exported.Config, "golang.org/fake/a", "golang.org/fake/c")
if err != nil {
t.Fatal(err)
}
graph, all := importGraph(initial)
wantGraph := `
* golang.org/fake/a
golang.org/fake/a/vendor/b
* golang.org/fake/c
golang.org/fake/c/vendor/b
golang.org/fake/a -> golang.org/fake/a/vendor/b
golang.org/fake/a -> golang.org/fake/c
golang.org/fake/a/vendor/b -> golang.org/fake/c
golang.org/fake/c -> golang.org/fake/c/vendor/b
`[1:]
if graph != wantGraph {
t.Errorf("wrong import graph: got <<%s>>, want <<%s>>", graph, wantGraph)
}
for _, test := range []struct {
pattern string
wantImports string
}{
{"golang.org/fake/a", "b:golang.org/fake/a/vendor/b golang.org/fake/c:golang.org/fake/c"},
{"golang.org/fake/c", "b:golang.org/fake/c/vendor/b"},
{"golang.org/fake/a/vendor/b", "golang.org/fake/c:golang.org/fake/c"},
{"golang.org/fake/c/vendor/b", ""},
} {
// Test the import paths.
pkg := all[test.pattern]
if imports := strings.Join(imports(pkg), " "); imports != test.wantImports {
t.Errorf("package %q: got %s, want %s", test.pattern, imports, test.wantImports)
}
}
}
func imports(p *packages.Package) []string {
if p == nil {
return nil
}
keys := make([]string, 0, len(p.Imports))
for k, v := range p.Imports {
keys = append(keys, fmt.Sprintf("%s:%s", k, v.ID))
}
sort.Strings(keys)
return keys
}
func TestConfigDir(t *testing.T) { packagestest.TestAll(t, testConfigDir) }
func testConfigDir(t *testing.T, exporter packagestest.Exporter) {
exported := packagestest.Export(t, exporter, []packagestest.Module{{
Name: "golang.org/fake",
Files: map[string]interface{}{
"a/a.go": `package a; const Name = "a" `,
"a/b/b.go": `package b; const Name = "a/b"`,
"b/b.go": `package b; const Name = "b"`,
}}})
defer exported.Cleanup()
aDir := filepath.Dir(exported.File("golang.org/fake", "a/a.go"))
bDir := filepath.Dir(exported.File("golang.org/fake", "b/b.go"))
baseDir := filepath.Dir(aDir)
for _, test := range []struct {
dir string
pattern string
want string // value of Name constant
fails bool
}{
{dir: bDir, pattern: "golang.org/fake/a", want: `"a"`},
{dir: bDir, pattern: "golang.org/fake/b", want: `"b"`},
{dir: bDir, pattern: "./a", fails: true},
{dir: bDir, pattern: "./b", fails: true},
{dir: baseDir, pattern: "golang.org/fake/a", want: `"a"`},
{dir: baseDir, pattern: "golang.org/fake/b", want: `"b"`},
{dir: baseDir, pattern: "./a", want: `"a"`},
{dir: baseDir, pattern: "./b", want: `"b"`},
{dir: aDir, pattern: "golang.org/fake/a", want: `"a"`},
{dir: aDir, pattern: "golang.org/fake/b", want: `"b"`},
{dir: aDir, pattern: "./a", fails: true},
{dir: aDir, pattern: "./b", want: `"a/b"`},
} {
exported.Config.Mode = packages.LoadSyntax // Use LoadSyntax to ensure that files can be opened.
exported.Config.Dir = test.dir
initial, err := packages.Load(exported.Config, test.pattern)
var got string
fails := false
if err != nil {
fails = true
} else if len(initial) > 0 {
if len(initial[0].Errors) > 0 {
fails = true
} else if c := constant(initial[0], "Name"); c != nil {
got = c.Val().String()
}
}
if got != test.want {
t.Errorf("dir %q, pattern %q: got %s, want %s",
test.dir, test.pattern, got, test.want)
}
if fails != test.fails {
// TODO: remove when go#28023 is fixed
if test.fails && strings.HasPrefix(test.pattern, "./") && exporter == packagestest.Modules {
// Currently go list in module mode does not handle missing directories correctly.
continue
}
t.Errorf("dir %q, pattern %q: error %v, want %v",
test.dir, test.pattern, fails, test.fails)
}
}
}
func TestConfigFlags(t *testing.T) { packagestest.TestAll(t, testConfigFlags) }
func testConfigFlags(t *testing.T, exporter packagestest.Exporter) {
// Test satisfying +build line tags, with -tags flag.
exported := packagestest.Export(t, exporter, []packagestest.Module{{
Name: "golang.org/fake",
Files: map[string]interface{}{
// package a
"a/a.go": `package a; import _ "golang.org/fake/a/b"`,
"a/b.go": `// +build tag
package a`,
"a/c.go": `// +build tag tag2
package a`,
"a/d.go": `// +build tag,tag2
package a`,
// package a/b
"a/b/a.go": `package b`,
"a/b/b.go": `// +build tag
package b`,
}}})
defer exported.Cleanup()
for _, test := range []struct {
pattern string
tags []string
wantSrcs string
wantImportSrcs string
}{
{`golang.org/fake/a`, []string{}, "a.go", "a.go"},
{`golang.org/fake/a`, []string{`-tags=tag`}, "a.go b.go c.go", "a.go b.go"},
{`golang.org/fake/a`, []string{`-tags=tag2`}, "a.go c.go", "a.go"},
{`golang.org/fake/a`, []string{`-tags=tag tag2`}, "a.go b.go c.go d.go", "a.go b.go"},
} {
exported.Config.Mode = packages.LoadImports
exported.Config.BuildFlags = test.tags
initial, err := packages.Load(exported.Config, test.pattern)
if err != nil {
t.Error(err)
continue
}
if len(initial) != 1 {
t.Errorf("test tags %v: pattern %s, expected 1 package, got %d packages.", test.tags, test.pattern, len(initial))
continue
}
pkg := initial[0]
if srcs := strings.Join(srcs(pkg), " "); srcs != test.wantSrcs {
t.Errorf("test tags %v: srcs of package %s = [%s], want [%s]", test.tags, test.pattern, srcs, test.wantSrcs)
}
for path, ipkg := range pkg.Imports {
if srcs := strings.Join(srcs(ipkg), " "); srcs != test.wantImportSrcs {
t.Errorf("build tags %v: srcs of imported package %s = [%s], want [%s]", test.tags, path, srcs, test.wantImportSrcs)
}
}
}
}
func TestLoadTypes(t *testing.T) { packagestest.TestAll(t, testLoadTypes) }
func testLoadTypes(t *testing.T, exporter packagestest.Exporter) {
// In LoadTypes and LoadSyntax modes, the compiler will
// fail to generate an export data file for c, because it has
// a type error. The loader should fall back loading a and c
// from source, but use the export data for b.
exported := packagestest.Export(t, exporter, []packagestest.Module{{
Name: "golang.org/fake",
Files: map[string]interface{}{
"a/a.go": `package a; import "golang.org/fake/b"; import "golang.org/fake/c"; const A = "a" + b.B + c.C`,
"b/b.go": `package b; const B = "b"`,
"c/c.go": `package c; const C = "c" + 1`,
}}})
defer exported.Cleanup()
exported.Config.Mode = packages.LoadTypes
initial, err := packages.Load(exported.Config, "golang.org/fake/a")
if err != nil {
t.Fatal(err)
}
graph, all := importGraph(initial)
wantGraph := `
* golang.org/fake/a
golang.org/fake/b
golang.org/fake/c
golang.org/fake/a -> golang.org/fake/b
golang.org/fake/a -> golang.org/fake/c
`[1:]
if graph != wantGraph {
t.Errorf("wrong import graph: got <<%s>>, want <<%s>>", graph, wantGraph)
}
for _, id := range []string{
"golang.org/fake/a",
"golang.org/fake/b",
"golang.org/fake/c",
} {
p := all[id]
if p == nil {
t.Errorf("missing package: %s", id)
continue
}
if p.Types == nil {
t.Errorf("missing types.Package for %s", p)
continue
} else if !p.Types.Complete() {
t.Errorf("incomplete types.Package for %s", p)
} else if p.TypesSizes == nil {
t.Errorf("TypesSizes is not filled in for %s", p)
}
}
}
// TestLoadTypesBits is equivalent to TestLoadTypes except that it only requests
// the types using the NeedTypes bit.
func TestLoadTypesBits(t *testing.T) { packagestest.TestAll(t, testLoadTypesBits) }
func testLoadTypesBits(t *testing.T, exporter packagestest.Exporter) {
exported := packagestest.Export(t, exporter, []packagestest.Module{{
Name: "golang.org/fake",
Files: map[string]interface{}{
"a/a.go": `package a; import "golang.org/fake/b"; const A = "a" + b.B`,
"b/b.go": `package b; import "golang.org/fake/c"; const B = "b" + c.C`,
"c/c.go": `package c; import "golang.org/fake/d"; const C = "c" + d.D`,
"d/d.go": `package d; import "golang.org/fake/e"; const D = "d" + e.E`,
"e/e.go": `package e; import "golang.org/fake/f"; const E = "e" + f.F`,
"f/f.go": `package f; const F = "f"`,
}}})
defer exported.Cleanup()
exported.Config.Mode = packages.NeedTypes | packages.NeedImports
initial, err := packages.Load(exported.Config, "golang.org/fake/a", "golang.org/fake/c")
if err != nil {
t.Fatal(err)
}
graph, all := importGraph(initial)
wantGraph := `
* golang.org/fake/a
golang.org/fake/b
* golang.org/fake/c
golang.org/fake/d
golang.org/fake/e
golang.org/fake/f
golang.org/fake/a -> golang.org/fake/b
golang.org/fake/b -> golang.org/fake/c
golang.org/fake/c -> golang.org/fake/d
golang.org/fake/d -> golang.org/fake/e
golang.org/fake/e -> golang.org/fake/f
`[1:]
if graph != wantGraph {
t.Errorf("wrong import graph: got <<%s>>, want <<%s>>", graph, wantGraph)
}
for _, test := range []struct {
id string
}{
{"golang.org/fake/a"},
{"golang.org/fake/b"},
{"golang.org/fake/c"},
{"golang.org/fake/d"},
{"golang.org/fake/e"},
{"golang.org/fake/f"},
} {
p := all[test.id]
if p == nil {
t.Errorf("missing package: %s", test.id)
continue
}
if p.Types == nil {
t.Errorf("missing types.Package for %s", p)
continue
}
// We don't request the syntax, so we shouldn't get it.
if p.Syntax != nil {
t.Errorf("Syntax unexpectedly provided for %s", p)
}
if p.Errors != nil {
t.Errorf("errors in package: %s: %s", p, p.Errors)
}
}
// Check value of constant.
aA := constant(all["golang.org/fake/a"], "A")
if aA == nil {
t.Fatalf("a.A: got nil")
}
if got, want := fmt.Sprintf("%v %v", aA, aA.Val()), `const golang.org/fake/a.A untyped string "abcdef"`; got != want {
t.Errorf("a.A: got %s, want %s", got, want)
}
}
func TestLoadSyntaxOK(t *testing.T) { packagestest.TestAll(t, testLoadSyntaxOK) }
func testLoadSyntaxOK(t *testing.T, exporter packagestest.Exporter) {
exported := packagestest.Export(t, exporter, []packagestest.Module{{
Name: "golang.org/fake",
Files: map[string]interface{}{
"a/a.go": `package a; import "golang.org/fake/b"; const A = "a" + b.B`,
"b/b.go": `package b; import "golang.org/fake/c"; const B = "b" + c.C`,
"c/c.go": `package c; import "golang.org/fake/d"; const C = "c" + d.D`,
"d/d.go": `package d; import "golang.org/fake/e"; const D = "d" + e.E`,
"e/e.go": `package e; import "golang.org/fake/f"; const E = "e" + f.F`,
"f/f.go": `package f; const F = "f"`,
}}})
defer exported.Cleanup()
exported.Config.Mode = packages.LoadSyntax
initial, err := packages.Load(exported.Config, "golang.org/fake/a", "golang.org/fake/c")
if err != nil {
t.Fatal(err)
}
graph, all := importGraph(initial)
wantGraph := `
* golang.org/fake/a
golang.org/fake/b
* golang.org/fake/c
golang.org/fake/d
golang.org/fake/e
golang.org/fake/f
golang.org/fake/a -> golang.org/fake/b
golang.org/fake/b -> golang.org/fake/c
golang.org/fake/c -> golang.org/fake/d
golang.org/fake/d -> golang.org/fake/e
golang.org/fake/e -> golang.org/fake/f
`[1:]
if graph != wantGraph {
t.Errorf("wrong import graph: got <<%s>>, want <<%s>>", graph, wantGraph)
}
for _, test := range []struct {
id string
wantSyntax bool
wantComplete bool
}{
{"golang.org/fake/a", true, true}, // source package
{"golang.org/fake/b", true, true}, // source package because depends on initial package
{"golang.org/fake/c", true, true}, // source package
{"golang.org/fake/d", false, true}, // export data package
{"golang.org/fake/e", false, false}, // export data package
{"golang.org/fake/f", false, false}, // export data package
} {
// TODO(matloob): LoadSyntax and LoadAllSyntax are now equivalent, wantSyntax and wantComplete
// are true for all packages in the transitive dependency set. Add test cases on the individual
// Need* fields to check the equivalents on the new API.
p := all[test.id]
if p == nil {
t.Errorf("missing package: %s", test.id)
continue
}
if p.Types == nil {
t.Errorf("missing types.Package for %s", p)
continue
} else if p.Types.Complete() != test.wantComplete {
if test.wantComplete {
t.Errorf("incomplete types.Package for %s", p)
} else {
t.Errorf("unexpected complete types.Package for %s", p)
}
}
if (p.Syntax != nil) != test.wantSyntax {
if test.wantSyntax {
t.Errorf("missing ast.Files for %s", p)
} else {
t.Errorf("unexpected ast.Files for for %s", p)
}
}
if p.Errors != nil {
t.Errorf("errors in package: %s: %s", p, p.Errors)
}
}
// Check value of constant.
aA := constant(all["golang.org/fake/a"], "A")
if aA == nil {
t.Fatalf("a.A: got nil")
}
if got, want := fmt.Sprintf("%v %v", aA, aA.Val()), `const golang.org/fake/a.A untyped string "abcdef"`; got != want {
t.Errorf("a.A: got %s, want %s", got, want)
}
}
func TestLoadDiamondTypes(t *testing.T) { packagestest.TestAll(t, testLoadDiamondTypes) }
func testLoadDiamondTypes(t *testing.T, exporter packagestest.Exporter) {
// We make a diamond dependency and check the type d.D is the same through both paths
exported := packagestest.Export(t, exporter, []packagestest.Module{{
Name: "golang.org/fake",
Files: map[string]interface{}{
"a/a.go": `package a; import ("golang.org/fake/b"; "golang.org/fake/c"); var _ = b.B == c.C`,
"b/b.go": `package b; import "golang.org/fake/d"; var B d.D`,
"c/c.go": `package c; import "golang.org/fake/d"; var C d.D`,
"d/d.go": `package d; type D int`,
}}})
defer exported.Cleanup()
exported.Config.Mode = packages.LoadSyntax
initial, err := packages.Load(exported.Config, "golang.org/fake/a")
if err != nil {
t.Fatal(err)
}
packages.Visit(initial, nil, func(pkg *packages.Package) {
for _, err := range pkg.Errors {
t.Errorf("package %s: %v", pkg.ID, err)
}
})
graph, _ := importGraph(initial)
wantGraph := `
* golang.org/fake/a
golang.org/fake/b
golang.org/fake/c
golang.org/fake/d
golang.org/fake/a -> golang.org/fake/b
golang.org/fake/a -> golang.org/fake/c
golang.org/fake/b -> golang.org/fake/d
golang.org/fake/c -> golang.org/fake/d
`[1:]
if graph != wantGraph {
t.Errorf("wrong import graph: got <<%s>>, want <<%s>>", graph, wantGraph)
}
}
func TestLoadSyntaxError(t *testing.T) { packagestest.TestAll(t, testLoadSyntaxError) }
func testLoadSyntaxError(t *testing.T, exporter packagestest.Exporter) {
// A type error in a lower-level package (e) prevents go list
// from producing export data for all packages that depend on it
// [a-e]. Only f should be loaded from export data, and the rest
// should be IllTyped.
exported := packagestest.Export(t, exporter, []packagestest.Module{{
Name: "golang.org/fake",
Files: map[string]interface{}{
"a/a.go": `package a; import "golang.org/fake/b"; const A = "a" + b.B`,
"b/b.go": `package b; import "golang.org/fake/c"; const B = "b" + c.C`,
"c/c.go": `package c; import "golang.org/fake/d"; const C = "c" + d.D`,
"d/d.go": `package d; import "golang.org/fake/e"; const D = "d" + e.E`,
"e/e.go": `package e; import "golang.org/fake/f"; const E = "e" + f.F + 1`, // type error
"f/f.go": `package f; const F = "f"`,
}}})
defer exported.Cleanup()
exported.Config.Mode = packages.LoadSyntax
initial, err := packages.Load(exported.Config, "golang.org/fake/a", "golang.org/fake/c")
if err != nil {
t.Fatal(err)
}
all := make(map[string]*packages.Package)
packages.Visit(initial, nil, func(p *packages.Package) {
all[p.ID] = p
})
for _, test := range []struct {
id string
wantSyntax bool
wantIllTyped bool
}{
{"golang.org/fake/a", true, true},
{"golang.org/fake/b", true, true},
{"golang.org/fake/c", true, true},
{"golang.org/fake/d", true, true},
{"golang.org/fake/e", true, true},
{"golang.org/fake/f", false, false},
} {
p := all[test.id]
if p == nil {
t.Errorf("missing package: %s", test.id)
continue
}
if p.Types == nil {
t.Errorf("missing types.Package for %s", p)
continue
} else if !p.Types.Complete() {
t.Errorf("incomplete types.Package for %s", p)
}
if (p.Syntax != nil) != test.wantSyntax {
if test.wantSyntax {
t.Errorf("missing ast.Files for %s", test.id)
} else {
t.Errorf("unexpected ast.Files for for %s", test.id)
}
}
if p.IllTyped != test.wantIllTyped {
t.Errorf("IllTyped was %t for %s", p.IllTyped, test.id)
}
}
// Check value of constant.
aA := constant(all["golang.org/fake/a"], "A")
if aA == nil {
t.Fatalf("a.A: got nil")
}
if got, want := aA.String(), `const golang.org/fake/a.A invalid type`; got != want {
t.Errorf("a.A: got %s, want %s", got, want)
}
}
// This function tests use of the ParseFile hook to modify
// the AST after parsing.
func TestParseFileModifyAST(t *testing.T) { packagestest.TestAll(t, testParseFileModifyAST) }
func testParseFileModifyAST(t *testing.T, exporter packagestest.Exporter) {
exported := packagestest.Export(t, exporter, []packagestest.Module{{
Name: "golang.org/fake",
Files: map[string]interface{}{
"a/a.go": `package a; const A = "a" `,
}}})
defer exported.Cleanup()
exported.Config.Mode = packages.LoadAllSyntax
exported.Config.ParseFile = func(fset *token.FileSet, filename string, src []byte) (*ast.File, error) {
const mode = parser.AllErrors | parser.ParseComments
f, err := parser.ParseFile(fset, filename, src, mode)
// modify AST to change `const A = "a"` to `const A = "b"`
spec := f.Decls[0].(*ast.GenDecl).Specs[0].(*ast.ValueSpec)
spec.Values[0].(*ast.BasicLit).Value = `"b"`
return f, err
}
initial, err := packages.Load(exported.Config, "golang.org/fake/a")
if err != nil {
t.Error(err)
}
// Check value of a.A has been set to "b"
a := initial[0]
got := constant(a, "A").Val().String()
if got != `"b"` {
t.Errorf("a.A: got %s, want %s", got, `"b"`)
}
}
func TestOverlay(t *testing.T) { packagestest.TestAll(t, testOverlay) }
func testOverlay(t *testing.T, exporter packagestest.Exporter) {
exported := packagestest.Export(t, exporter, []packagestest.Module{{
Name: "golang.org/fake",
Files: map[string]interface{}{
"a/a.go": `package a; import "golang.org/fake/b"; const A = "a" + b.B`,
"b/b.go": `package b; import "golang.org/fake/c"; const B = "b" + c.C`,
"c/c.go": `package c; const C = "c"`,
"c/c_test.go": `package c; import "testing"; func TestC(t *testing.T) {}`,
"d/d.go": `package d; const D = "d"`,
}}})
defer exported.Cleanup()
for i, test := range []struct {
overlay map[string][]byte
want string // expected value of a.A
wantErrs []string
}{
{nil, `"abc"`, nil}, // default
{map[string][]byte{}, `"abc"`, nil}, // empty overlay
{map[string][]byte{exported.File("golang.org/fake", "c/c.go"): []byte(`package c; const C = "C"`)}, `"abC"`, nil},
{map[string][]byte{exported.File("golang.org/fake", "b/b.go"): []byte(`package b; import "golang.org/fake/c"; const B = "B" + c.C`)}, `"aBc"`, nil},
// Overlay with an existing file in an existing package adding a new import.
{map[string][]byte{exported.File("golang.org/fake", "b/b.go"): []byte(`package b; import "golang.org/fake/d"; const B = "B" + d.D`)}, `"aBd"`, nil},
// Overlay with an existing file in an existing package.
{map[string][]byte{exported.File("golang.org/fake", "c/c.go"): []byte(`package c; import "net/http"; const C = http.MethodGet`)}, `"abGET"`, nil},
// Overlay with a new file in an existing package.
{map[string][]byte{
exported.File("golang.org/fake", "c/c.go"): []byte(`package c;`),
filepath.Join(filepath.Dir(exported.File("golang.org/fake", "c/c.go")), "c_new_file.go"): []byte(`package c; const C = "Ç"`)},
`"abÇ"`, nil},
// Overlay with a new file in an existing package, adding a new dependency to that package.
{map[string][]byte{
exported.File("golang.org/fake", "c/c.go"): []byte(`package c;`),
filepath.Join(filepath.Dir(exported.File("golang.org/fake", "c/c.go")), "c_new_file.go"): []byte(`package c; import "golang.org/fake/d"; const C = "c" + d.D`)},
`"abcd"`, nil},
} {
exported.Config.Overlay = test.overlay
exported.Config.Mode = packages.LoadAllSyntax
initial, err := packages.Load(exported.Config, "golang.org/fake/a")
if err != nil {
t.Error(err)
continue
}
// Check value of a.A.
a := initial[0]
aA := constant(a, "A")
if aA == nil {
t.Errorf("%d. a.A: got nil", i)
continue
}
got := aA.Val().String()
if got != test.want {
t.Errorf("%d. a.A: got %s, want %s", i, got, test.want)
}
// Check errors.
var errors []packages.Error
packages.Visit(initial, nil, func(pkg *packages.Package) {
errors = append(errors, pkg.Errors...)
})
if errs := errorMessages(errors); !reflect.DeepEqual(errs, test.wantErrs) {
t.Errorf("%d. got errors %s, want %s", i, errs, test.wantErrs)
}
}
}
func TestOverlayDeps(t *testing.T) { packagestest.TestAll(t, testOverlayDeps) }
func testOverlayDeps(t *testing.T, exporter packagestest.Exporter) {
exported := packagestest.Export(t, exporter, []packagestest.Module{{
Name: "golang.org/fake",
Files: map[string]interface{}{
"c/c.go": `package c; const C = "c"`,
"c/c_test.go": `package c; import "testing"; func TestC(t *testing.T) {}`,
},
}})
defer exported.Cleanup()
exported.Config.Overlay = map[string][]byte{exported.File("golang.org/fake", "c/c.go"): []byte(`package c; import "net/http"; const C = http.MethodGet`)}
exported.Config.Mode = packages.NeedName |
packages.NeedFiles |
packages.NeedCompiledGoFiles |
packages.NeedImports |
packages.NeedDeps |
packages.NeedTypesSizes
pkgs, err := packages.Load(exported.Config, fmt.Sprintf("file=%s", exported.File("golang.org/fake", "c/c.go")))
if err != nil {
t.Error(err)
}
// Find package golang.org/fake/c
sort.Slice(pkgs, func(i, j int) bool { return pkgs[i].ID < pkgs[j].ID })
pkgc := pkgs[0]
if pkgc.ID != "golang.org/fake/c" {
t.Errorf("expected first package in sorted list to be \"golang.org/fake/c\", got %v", pkgc.ID)
}
// Make sure golang.org/fake/c imports net/http, as per the overlay.
contains := func(imports map[string]*packages.Package, wantImport string) bool {
for imp := range imports {
if imp == wantImport {
return true
}
}
return false
}
if !contains(pkgc.Imports, "net/http") {
t.Errorf("expected import of %s in package %s, got the following imports: %v",
"net/http", pkgc.ID, pkgc.Imports)
}
}
func TestNewPackagesInOverlay(t *testing.T) { packagestest.TestAll(t, testNewPackagesInOverlay) }
func testNewPackagesInOverlay(t *testing.T, exporter packagestest.Exporter) {
exported := packagestest.Export(t, exporter, []packagestest.Module{
{
Name: "golang.org/fake",
Files: map[string]interface{}{
"a/a.go": `package a; import "golang.org/fake/b"; const A = "a" + b.B`,
"b/b.go": `package b; import "golang.org/fake/c"; const B = "b" + c.C`,
"c/c.go": `package c; const C = "c"`,
"d/d.go": `package d; const D = "d"`,
},
},
{
Name: "example.com/extramodule",
Files: map[string]interface{}{
"pkg/x.go": "package pkg\n",
},
},
})
defer exported.Cleanup()
dir := filepath.Dir(filepath.Dir(exported.File("golang.org/fake", "a/a.go")))
for _, test := range []struct {
name string
overlay map[string][]byte
want string // expected value of e.E
}{
{"one_file",
map[string][]byte{
filepath.Join(dir, "e", "e.go"): []byte(`package e; import "golang.org/fake/a"; const E = "e" + a.A`)},
`"eabc"`},
{"multiple_files_same_package",
map[string][]byte{
filepath.Join(dir, "e", "e.go"): []byte(`package e; import "golang.org/fake/a"; const E = "e" + a.A + underscore`),
filepath.Join(dir, "e", "e_util.go"): []byte(`package e; const underscore = "_"`),
},
`"eabc_"`},
{"multiple_files_two_packages",
map[string][]byte{
filepath.Join(dir, "e", "e.go"): []byte(`package e; import "golang.org/fake/f"; const E = "e" + f.F + underscore`),
filepath.Join(dir, "e", "e_util.go"): []byte(`package e; const underscore = "_"`),
filepath.Join(dir, "f", "f.go"): []byte(`package f; const F = "f"`),
},
`"ef_"`},
{"multiple_files_three_packages",
map[string][]byte{
filepath.Join(dir, "e", "e.go"): []byte(`package e; import "golang.org/fake/f"; const E = "e" + f.F + underscore`),
filepath.Join(dir, "e", "e_util.go"): []byte(`package e; const underscore = "_"`),
filepath.Join(dir, "f", "f.go"): []byte(`package f; import "golang.org/fake/g"; const F = "f" + g.G`),
filepath.Join(dir, "g", "g.go"): []byte(`package g; const G = "g"`),
},
`"efg_"`},
{"multiple_files_four_packages",
map[string][]byte{
filepath.Join(dir, "e", "e.go"): []byte(`package e; import "golang.org/fake/f"; import "golang.org/fake/h"; const E = "e" + f.F + h.H + underscore`),
filepath.Join(dir, "e", "e_util.go"): []byte(`package e; const underscore = "_"`),
filepath.Join(dir, "f", "f.go"): []byte(`package f; import "golang.org/fake/g"; const F = "f" + g.G`),
filepath.Join(dir, "g", "g.go"): []byte(`package g; const G = "g"`),
filepath.Join(dir, "h", "h.go"): []byte(`package h; const H = "h"`),
},
`"efgh_"`},
{"multiple_files_four_packages_again",
map[string][]byte{
filepath.Join(dir, "e", "e.go"): []byte(`package e; import "golang.org/fake/f"; const E = "e" + f.F + underscore`),
filepath.Join(dir, "e", "e_util.go"): []byte(`package e; const underscore = "_"`),
filepath.Join(dir, "f", "f.go"): []byte(`package f; import "golang.org/fake/g"; const F = "f" + g.G`),
filepath.Join(dir, "g", "g.go"): []byte(`package g; import "golang.org/fake/h"; const G = "g" + h.H`),
filepath.Join(dir, "h", "h.go"): []byte(`package h; const H = "h"`),
},
`"efgh_"`},
{"main_overlay",
map[string][]byte{
filepath.Join(dir, "e", "main.go"): []byte(`package main; import "golang.org/fake/a"; const E = "e" + a.A; func main(){}`)},
`"eabc"`},
} {
t.Run(test.name, func(t *testing.T) {
exported.Config.Overlay = test.overlay
exported.Config.Mode = packages.LoadAllSyntax
exported.Config.Logf = t.Logf
// With an overlay, we don't know the expected import path,
// so load with the absolute path of the directory.
initial, err := packages.Load(exported.Config, filepath.Join(dir, "e"))
if err != nil {
t.Fatal(err)
}
// Check value of e.E.
e := initial[0]
eE := constant(e, "E")
if eE == nil {
t.Fatalf("e.E: was nil in %#v", e)
}
got := eE.Val().String()
if got != test.want {
t.Fatalf("e.E: got %s, want %s", got, test.want)
}
})
}
}
// Test that we can create a package and its test package in an overlay.
func TestOverlayNewPackageAndTest(t *testing.T) {
packagestest.TestAll(t, testOverlayNewPackageAndTest)
}
func testOverlayNewPackageAndTest(t *testing.T, exporter packagestest.Exporter) {
exported := packagestest.Export(t, exporter, []packagestest.Module{
{
Name: "golang.org/fake",
Files: map[string]interface{}{
"foo.txt": "placeholder",
},
},
})
defer exported.Cleanup()
dir := filepath.Dir(exported.File("golang.org/fake", "foo.txt"))
exported.Config.Overlay = map[string][]byte{
filepath.Join(dir, "a.go"): []byte(`package a;`),
filepath.Join(dir, "a_test.go"): []byte(`package a; import "testing";`),
}
initial, err := packages.Load(exported.Config, "file="+filepath.Join(dir, "a.go"), "file="+filepath.Join(dir, "a_test.go"))
if err != nil {
t.Fatal(err)
}
if len(initial) != 2 {
t.Errorf("got %v packages, wanted %v", len(initial), 2)
}
}
func TestAdHocPackagesBadImport(t *testing.T) {
// This test doesn't use packagestest because we are testing ad-hoc packages,
// which are outside of $GOPATH and outside of a module.
tmp, err := ioutil.TempDir("", "a")
if err != nil {
t.Fatal(err)
}
defer os.RemoveAll(tmp)
filename := filepath.Join(tmp, "a.go")
content := []byte(`package a
import _ "badimport"
const A = 1
`)
if err := ioutil.WriteFile(filename, content, 0775); err != nil {
t.Fatal(err)
}
// Make sure that the user's value of GO111MODULE does not affect test results.
for _, go111module := range []string{"off", "auto", "on"} {
config := &packages.Config{
Env: append(os.Environ(), "GOPACKAGESDRIVER=off", fmt.Sprintf("GO111MODULE=%s", go111module)),
Dir: tmp,
Mode: packages.LoadAllSyntax,
Logf: t.Logf,
}
initial, err := packages.Load(config, fmt.Sprintf("file=%s", filename))
if err != nil {
t.Error(err)
}
if len(initial) == 0 {
t.Fatalf("no packages for %s with GO111MODULE=%s", filename, go111module)
}
// Check value of a.A.
a := initial[0]
// There's an error because there's a bad import.
aA := constant(a, "A")
if aA == nil {
t.Errorf("a.A: got nil")
return
}
got := aA.Val().String()
if want := "1"; got != want {
t.Errorf("a.A: got %s, want %s", got, want)
}
}
}
func TestAdHocOverlays(t *testing.T) {
testenv.NeedsTool(t, "go")
// This test doesn't use packagestest because we are testing ad-hoc packages,
// which are outside of $GOPATH and outside of a module.
tmp, err := ioutil.TempDir("", "testAdHocOverlays")
if err != nil {
t.Fatal(err)
}
defer os.RemoveAll(tmp)
filename := filepath.Join(tmp, "a.go")
content := []byte(`package a
const A = 1
`)
// Make sure that the user's value of GO111MODULE does not affect test results.
for _, go111module := range []string{"off", "auto", "on"} {
t.Run("GO111MODULE="+go111module, func(t *testing.T) {
config := &packages.Config{
Dir: tmp,
Env: append(os.Environ(), "GOPACKAGESDRIVER=off", fmt.Sprintf("GO111MODULE=%s", go111module)),
Mode: packages.LoadAllSyntax,
Overlay: map[string][]byte{
filename: content,
},
Logf: t.Logf,
}
initial, err := packages.Load(config, fmt.Sprintf("file=%s", filename))
if err != nil {
t.Fatal(err)
}
if len(initial) == 0 {
t.Fatalf("no packages for %s", filename)
}
// Check value of a.A.
a := initial[0]
if a.Errors != nil {
t.Fatalf("a: got errors %+v, want no error", err)
}
aA := constant(a, "A")
if aA == nil {
t.Errorf("a.A: got nil")
return
}
got := aA.Val().String()
if want := "1"; got != want {
t.Errorf("a.A: got %s, want %s", got, want)
}
})
}
}
// TestOverlayModFileChanges tests the behavior resulting from having files from
// multiple modules in overlays.
func TestOverlayModFileChanges(t *testing.T) {
testenv.NeedsTool(t, "go")
// Create two unrelated modules in a temporary directory.
tmp, err := ioutil.TempDir("", "tmp")
if err != nil {
t.Fatal(err)
}
defer os.RemoveAll(tmp)
// mod1 has a dependency on golang.org/x/xerrors.
mod1, err := ioutil.TempDir(tmp, "mod1")
if err != nil {
t.Fatal(err)
}
if err := ioutil.WriteFile(filepath.Join(mod1, "go.mod"), []byte(`module mod1
require (
golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7
)
`), 0775); err != nil {
t.Fatal(err)
}
// mod2 does not have any dependencies.
mod2, err := ioutil.TempDir(tmp, "mod2")
if err != nil {
t.Fatal(err)
}
want := `module mod2
go 1.11
`
if err := ioutil.WriteFile(filepath.Join(mod2, "go.mod"), []byte(want), 0775); err != nil {
t.Fatal(err)
}
// Run packages.Load on mod2, while passing the contents over mod1/main.go in the overlay.
config := &packages.Config{
Dir: mod2,
Env: append(os.Environ(), "GOPACKAGESDRIVER=off"),
Mode: packages.LoadImports,
Overlay: map[string][]byte{
filepath.Join(mod1, "main.go"): []byte(`package main
import "golang.org/x/xerrors"
func main() {
_ = errors.New("")
}
`),
filepath.Join(mod2, "main.go"): []byte(`package main
func main() {}
`),
},
}
if _, err := packages.Load(config, fmt.Sprintf("file=%s", filepath.Join(mod2, "main.go"))); err != nil {
t.Fatal(err)
}
// Check that mod2/go.mod has not been modified.
got, err := ioutil.ReadFile(filepath.Join(mod2, "go.mod"))
if err != nil {
t.Fatal(err)
}
if string(got) != want {
t.Errorf("expected %s, got %s", want, string(got))
}
}
func TestOverlayGOPATHVendoring(t *testing.T) {
exported := packagestest.Export(t, packagestest.GOPATH, []packagestest.Module{{
Name: "golang.org/fake",
Files: map[string]interface{}{
"vendor/vendor.com/foo/foo.go": `package foo; const X = "hi"`,
"user/user.go": `package user`,
},
}})
defer exported.Cleanup()
exported.Config.Mode = packages.LoadAllSyntax
exported.Config.Logf = t.Logf
exported.Config.Overlay = map[string][]byte{
exported.File("golang.org/fake", "user/user.go"): []byte(`package user; import "vendor.com/foo"; var x = foo.X`),
}
initial, err := packages.Load(exported.Config, "golang.org/fake/user")
if err != nil {
t.Fatal(err)
}
user := initial[0]
if len(user.Imports) != 1 {
t.Fatal("no imports for user")
}
if user.Imports["vendor.com/foo"].Name != "foo" {
t.Errorf("failed to load vendored package foo, imports: %#v", user.Imports["vendor.com/foo"])
}
}
func TestLoadAllSyntaxImportErrors(t *testing.T) {
packagestest.TestAll(t, testLoadAllSyntaxImportErrors)
}
func testLoadAllSyntaxImportErrors(t *testing.T, exporter packagestest.Exporter) {
// TODO(matloob): Remove this once go list -e -compiled is fixed.
// See https://golang.org/issue/26755
t.Skip("go list -compiled -e fails with non-zero exit status for empty packages")
exported := packagestest.Export(t, exporter, []packagestest.Module{{
Name: "golang.org/fake",
Files: map[string]interface{}{
"unicycle/unicycle.go": `package unicycle; import _ "unicycle"`,
"bicycle1/bicycle1.go": `package bicycle1; import _ "bicycle2"`,
"bicycle2/bicycle2.go": `package bicycle2; import _ "bicycle1"`,
"bad/bad.go": `not a package declaration`,
"empty/README.txt": `not a go file`,
"root/root.go": `package root
import (
_ "bicycle1"
_ "unicycle"
_ "nonesuch"
_ "empty"
_ "bad"
)`,
}}})
defer exported.Cleanup()
exported.Config.Mode = packages.LoadAllSyntax
initial, err := packages.Load(exported.Config, "root")
if err != nil {
t.Fatal(err)
}
// Cycle-forming edges are removed from the graph:
// bicycle2 -> bicycle1
// unicycle -> unicycle
graph, all := importGraph(initial)
wantGraph := `
bicycle1
bicycle2
* root
unicycle
bicycle1 -> bicycle2
root -> bicycle1
root -> unicycle
`[1:]
if graph != wantGraph {
t.Errorf("wrong import graph: got <<%s>>, want <<%s>>", graph, wantGraph)
}
for _, test := range []struct {
id string
wantErrs []string
}{
{"bicycle1", nil},
{"bicycle2", []string{
"could not import bicycle1 (import cycle: [root bicycle1 bicycle2])",
}},
{"unicycle", []string{
"could not import unicycle (import cycle: [root unicycle])",
}},
{"root", []string{
`could not import bad (missing package: "bad")`,
`could not import empty (missing package: "empty")`,
`could not import nonesuch (missing package: "nonesuch")`,
}},
} {
p := all[test.id]
if p == nil {
t.Errorf("missing package: %s", test.id)
continue
}
if p.Types == nil {
t.Errorf("missing types.Package for %s", test.id)
}
if p.Syntax == nil {
t.Errorf("missing ast.Files for %s", test.id)
}
if !p.IllTyped {
t.Errorf("IllTyped was false for %s", test.id)
}
if errs := errorMessages(p.Errors); !reflect.DeepEqual(errs, test.wantErrs) {
t.Errorf("in package %s, got errors %s, want %s", p, errs, test.wantErrs)
}
}
}
func TestAbsoluteFilenames(t *testing.T) { packagestest.TestAll(t, testAbsoluteFilenames) }
func testAbsoluteFilenames(t *testing.T, exporter packagestest.Exporter) {
exported := packagestest.Export(t, exporter, []packagestest.Module{{
Name: "golang.org/fake",
Files: map[string]interface{}{
"a/a.go": `package a; const A = 1`,
"b/b.go": `package b; import ("golang.org/fake/a"; _ "errors"); var B = a.A`,
"b/vendor/a/a.go": `package a; const A = 1`,
"c/c.go": `package c; import (_ "golang.org/fake/b"; _ "unsafe")`,
"c/c2.go": "// +build ignore\n\n" + `package c; import _ "fmt"`,
"subdir/d/d.go": `package d`,
"subdir/e/d.go": `package e`,
"e/e.go": `package main; import _ "golang.org/fake/b"`,
"e/e2.go": `package main; import _ "golang.org/fake/c"`,
"f/f.go": `package f`,
"f/f.s": ``,
}}})
defer exported.Cleanup()
exported.Config.Dir = filepath.Dir(filepath.Dir(exported.File("golang.org/fake", "a/a.go")))
checkFile := func(filename string) {
if !filepath.IsAbs(filename) {
t.Errorf("filename is not absolute: %s", filename)
}
if _, err := os.Stat(filename); err != nil {
t.Errorf("stat error, %s: %v", filename, err)
}
}
for _, test := range []struct {
pattern string
want string
}{
// Import paths
{"golang.org/fake/a", "a.go"},
{"golang.org/fake/b/vendor/a", "a.go"},
{"golang.org/fake/b", "b.go"},
{"golang.org/fake/c", "c.go"},
{"golang.org/fake/subdir/d", "d.go"},
{"golang.org/fake/subdir/e", "d.go"},
{"golang.org/fake/e", "e.go e2.go"},
{"golang.org/fake/f", "f.go f.s"},
// Relative paths
{"./a", "a.go"},
{"./b/vendor/a", "a.go"},
{"./b", "b.go"},
{"./c", "c.go"},
{"./subdir/d", "d.go"},
{"./subdir/e", "d.go"},
{"./e", "e.go e2.go"},
{"./f", "f.go f.s"},
} {
exported.Config.Mode = packages.LoadFiles
pkgs, err := packages.Load(exported.Config, test.pattern)
if err != nil {
t.Errorf("pattern %s: %v", test.pattern, err)
continue
}
if got := strings.Join(srcs(pkgs[0]), " "); got != test.want {
t.Errorf("in package %s, got %s, want %s", test.pattern, got, test.want)
}
// Test that files in all packages exist and are absolute paths.
_, all := importGraph(pkgs)
for _, pkg := range all {
for _, filename := range pkg.GoFiles {
checkFile(filename)
}
for _, filename := range pkg.OtherFiles {
checkFile(filename)
}
}
}
}
func TestContains(t *testing.T) { packagestest.TestAll(t, testContains) }
func testContains(t *testing.T, exporter packagestest.Exporter) {
exported := packagestest.Export(t, exporter, []packagestest.Module{{
Name: "golang.org/fake",
Files: map[string]interface{}{
"a/a.go": `package a; import "golang.org/fake/b"`,
"b/b.go": `package b; import "golang.org/fake/c"`,
"c/c.go": `package c`,
}}})
defer exported.Cleanup()
bFile := exported.File("golang.org/fake", "b/b.go")
exported.Config.Mode = packages.LoadImports
initial, err := packages.Load(exported.Config, "file="+bFile)
if err != nil {
t.Fatal(err)
}
graph, _ := importGraph(initial)
wantGraph := `
* golang.org/fake/b
golang.org/fake/c
golang.org/fake/b -> golang.org/fake/c
`[1:]
if graph != wantGraph {
t.Errorf("wrong import graph: got <<%s>>, want <<%s>>", graph, wantGraph)
}
}
func TestContainsOverlay(t *testing.T) { packagestest.TestAll(t, testContainsOverlay) }
func testContainsOverlay(t *testing.T, exporter packagestest.Exporter) {
exported := packagestest.Export(t, exporter, []packagestest.Module{{
Name: "golang.org/fake",
Files: map[string]interface{}{
"a/a.go": `package a; import "golang.org/fake/b"`,
"b/b.go": `package b; import "golang.org/fake/c"`,
"c/c.go": `package c`,
}}})
defer exported.Cleanup()
bOverlayFile := filepath.Join(filepath.Dir(exported.File("golang.org/fake", "b/b.go")), "b_overlay.go")
exported.Config.Mode = packages.LoadImports
exported.Config.Overlay = map[string][]byte{bOverlayFile: []byte(`package b;`)}
initial, err := packages.Load(exported.Config, "file="+bOverlayFile)
if err != nil {
t.Fatal(err)
}
graph, _ := importGraph(initial)
wantGraph := `
* golang.org/fake/b
golang.org/fake/c
golang.org/fake/b -> golang.org/fake/c
`[1:]
if graph != wantGraph {
t.Errorf("wrong import graph: got <<%s>>, want <<%s>>", graph, wantGraph)
}
}
func TestContainsOverlayXTest(t *testing.T) { packagestest.TestAll(t, testContainsOverlayXTest) }
func testContainsOverlayXTest(t *testing.T, exporter packagestest.Exporter) {
exported := packagestest.Export(t, exporter, []packagestest.Module{{
Name: "golang.org/fake",
Files: map[string]interface{}{
"a/a.go": `package a; import "golang.org/fake/b"`,
"b/b.go": `package b; import "golang.org/fake/c"`,
"c/c.go": `package c`,
}}})
defer exported.Cleanup()
bOverlayXTestFile := filepath.Join(filepath.Dir(exported.File("golang.org/fake", "b/b.go")), "b_overlay_x_test.go")
exported.Config.Mode = packages.NeedName | packages.NeedFiles | packages.NeedImports
exported.Config.Overlay = map[string][]byte{bOverlayXTestFile: []byte(`package b_test; import "golang.org/fake/b"`)}
initial, err := packages.Load(exported.Config, "file="+bOverlayXTestFile)
if err != nil {
t.Fatal(err)
}
graph, _ := importGraph(initial)
wantGraph := `
golang.org/fake/b
* golang.org/fake/b_test
golang.org/fake/c
golang.org/fake/b -> golang.org/fake/c
golang.org/fake/b_test -> golang.org/fake/b
`[1:]
if graph != wantGraph {
t.Errorf("wrong import graph: got <<%s>>, want <<%s>>", graph, wantGraph)
}
}
// This test ensures that the effective GOARCH variable in the
// application determines the Sizes function used by the type checker.
// This behavior is a stop-gap until we make the build system's query
// tool report the correct sizes function for the actual configuration.
func TestSizes(t *testing.T) { packagestest.TestAll(t, testSizes) }
func testSizes(t *testing.T, exporter packagestest.Exporter) {
// Only run this test on operating systems that have both an amd64 and 386 port.
switch runtime.GOOS {
case "linux", "windows", "freebsd", "openbsd", "netbsd", "android":
default:
t.Skipf("skipping test on %s", runtime.GOOS)
}
exported := packagestest.Export(t, exporter, []packagestest.Module{{
Name: "golang.org/fake",
Files: map[string]interface{}{
"a/a.go": `package a; import "unsafe"; const WordSize = 8*unsafe.Sizeof(int(0))`,
}}})
defer exported.Cleanup()
exported.Config.Mode = packages.LoadSyntax
savedEnv := exported.Config.Env
for arch, wantWordSize := range map[string]int64{"386": 32, "amd64": 64} {
exported.Config.Env = append(savedEnv, "GOARCH="+arch)
initial, err := packages.Load(exported.Config, "golang.org/fake/a")
if err != nil {
t.Fatal(err)
}
if packages.PrintErrors(initial) > 0 {
t.Fatal("there were errors")
}
gotWordSize, _ := constantpkg.Int64Val(constant(initial[0], "WordSize").Val())
if gotWordSize != wantWordSize {
t.Errorf("for GOARCH=%s, got word size %d, want %d", arch, gotWordSize, wantWordSize)
}
}
}
// TestContainsFallbackSticks ensures that when there are both contains and non-contains queries
// the decision whether to fallback to the pre-1.11 go list sticks across both sets of calls to
// go list.
func TestContainsFallbackSticks(t *testing.T) { packagestest.TestAll(t, testContainsFallbackSticks) }
func testContainsFallbackSticks(t *testing.T, exporter packagestest.Exporter) {
exported := packagestest.Export(t, exporter, []packagestest.Module{{
Name: "golang.org/fake",
Files: map[string]interface{}{
"a/a.go": `package a; import "golang.org/fake/b"`,
"b/b.go": `package b; import "golang.org/fake/c"`,
"c/c.go": `package c`,
}}})
defer exported.Cleanup()
exported.Config.Mode = packages.LoadImports
bFile := exported.File("golang.org/fake", "b/b.go")
initial, err := packages.Load(exported.Config, "golang.org/fake/a", "file="+bFile)
if err != nil {
t.Fatal(err)
}
graph, _ := importGraph(initial)
wantGraph := `
* golang.org/fake/a
* golang.org/fake/b
golang.org/fake/c
golang.org/fake/a -> golang.org/fake/b
golang.org/fake/b -> golang.org/fake/c
`[1:]
if graph != wantGraph {
t.Errorf("wrong import graph: got <<%s>>, want <<%s>>", graph, wantGraph)
}
}
// Test that Load with no patterns is equivalent to loading "." via the golist
// driver.
func TestNoPatterns(t *testing.T) { packagestest.TestAll(t, testNoPatterns) }
func testNoPatterns(t *testing.T, exporter packagestest.Exporter) {
exported := packagestest.Export(t, exporter, []packagestest.Module{{
Name: "golang.org/fake",
Files: map[string]interface{}{
"a/a.go": `package a;`,
"a/b/b.go": `package b;`,
}}})
defer exported.Cleanup()
aDir := filepath.Dir(exported.File("golang.org/fake", "a/a.go"))
exported.Config.Dir = aDir
initial, err := packages.Load(exported.Config)
if err != nil {
t.Fatal(err)
}
if len(initial) != 1 || initial[0].Name != "a" {
t.Fatalf(`Load() = %v, wanted just the package in the current directory`, initial)
}
}
func TestJSON(t *testing.T) { packagestest.TestAll(t, testJSON) }
func testJSON(t *testing.T, exporter packagestest.Exporter) {
//TODO: add in some errors
exported := packagestest.Export(t, exporter, []packagestest.Module{{
Name: "golang.org/fake",
Files: map[string]interface{}{
"a/a.go": `package a; const A = 1`,
"b/b.go": `package b; import "golang.org/fake/a"; var B = a.A`,
"c/c.go": `package c; import "golang.org/fake/b" ; var C = b.B`,
"d/d.go": `package d; import "golang.org/fake/b" ; var D = b.B`,
}}})
defer exported.Cleanup()
exported.Config.Mode = packages.LoadImports
initial, err := packages.Load(exported.Config, "golang.org/fake/c", "golang.org/fake/d")
if err != nil {
t.Fatal(err)
}
// Visit and print all packages.
buf := &bytes.Buffer{}
enc := json.NewEncoder(buf)
enc.SetIndent("", "\t")
packages.Visit(initial, nil, func(pkg *packages.Package) {
// trim the source lists for stable results
pkg.GoFiles = cleanPaths(pkg.GoFiles)
pkg.CompiledGoFiles = cleanPaths(pkg.CompiledGoFiles)
pkg.OtherFiles = cleanPaths(pkg.OtherFiles)
if err := enc.Encode(pkg); err != nil {
t.Fatal(err)
}
})
wantJSON := `
{
"ID": "golang.org/fake/a",
"Name": "a",
"PkgPath": "golang.org/fake/a",
"GoFiles": [
"a.go"
],
"CompiledGoFiles": [
"a.go"
]
}
{
"ID": "golang.org/fake/b",
"Name": "b",
"PkgPath": "golang.org/fake/b",
"GoFiles": [
"b.go"
],
"CompiledGoFiles": [
"b.go"
],
"Imports": {
"golang.org/fake/a": "golang.org/fake/a"
}
}
{
"ID": "golang.org/fake/c",
"Name": "c",
"PkgPath": "golang.org/fake/c",
"GoFiles": [
"c.go"
],
"CompiledGoFiles": [
"c.go"
],
"Imports": {
"golang.org/fake/b": "golang.org/fake/b"
}
}
{
"ID": "golang.org/fake/d",
"Name": "d",
"PkgPath": "golang.org/fake/d",
"GoFiles": [
"d.go"
],
"CompiledGoFiles": [
"d.go"
],
"Imports": {
"golang.org/fake/b": "golang.org/fake/b"
}
}
`[1:]
if buf.String() != wantJSON {
t.Errorf("wrong JSON: got <<%s>>, want <<%s>>", buf.String(), wantJSON)
}
// now decode it again
var decoded []*packages.Package
dec := json.NewDecoder(buf)
for dec.More() {
p := new(packages.Package)
if err := dec.Decode(p); err != nil {
t.Fatal(err)
}
decoded = append(decoded, p)
}
if len(decoded) != 4 {
t.Fatalf("got %d packages, want 4", len(decoded))
}
for i, want := range []*packages.Package{{
ID: "golang.org/fake/a",
Name: "a",
}, {
ID: "golang.org/fake/b",
Name: "b",
Imports: map[string]*packages.Package{
"golang.org/fake/a": {ID: "golang.org/fake/a"},
},
}, {
ID: "golang.org/fake/c",
Name: "c",
Imports: map[string]*packages.Package{
"golang.org/fake/b": {ID: "golang.org/fake/b"},
},
}, {
ID: "golang.org/fake/d",
Name: "d",
Imports: map[string]*packages.Package{
"golang.org/fake/b": {ID: "golang.org/fake/b"},
},
}} {
got := decoded[i]
if got.ID != want.ID {
t.Errorf("Package %d has ID %q want %q", i, got.ID, want.ID)
}
if got.Name != want.Name {
t.Errorf("Package %q has Name %q want %q", got.ID, got.Name, want.Name)
}
if len(got.Imports) != len(want.Imports) {
t.Errorf("Package %q has %d imports want %d", got.ID, len(got.Imports), len(want.Imports))
continue
}
for path, ipkg := range got.Imports {
if want.Imports[path] == nil {
t.Errorf("Package %q has unexpected import %q", got.ID, path)
continue
}
if want.Imports[path].ID != ipkg.ID {
t.Errorf("Package %q import %q is %q want %q", got.ID, path, ipkg.ID, want.Imports[path].ID)
}
}
}
}
func TestRejectInvalidQueries(t *testing.T) {
queries := []string{"key=", "key=value"}
cfg := &packages.Config{
Mode: packages.LoadImports,
Env: append(os.Environ(), "GO111MODULE=off", "GOPACKAGESDRIVER=off"),
}
for _, q := range queries {
if _, err := packages.Load(cfg, q); err == nil {
t.Errorf("packages.Load(%q) succeeded. Expected \"invalid query type\" error", q)
} else if !strings.Contains(err.Error(), "invalid query type") {
t.Errorf("packages.Load(%q): got error %v, want \"invalid query type\" error", q, err)
}
}
}
func TestPatternPassthrough(t *testing.T) { packagestest.TestAll(t, testPatternPassthrough) }
func testPatternPassthrough(t *testing.T, exporter packagestest.Exporter) {
exported := packagestest.Export(t, exporter, []packagestest.Module{{
Name: "golang.org/fake",
Files: map[string]interface{}{
"a/a.go": `package a;`,
}}})
defer exported.Cleanup()
initial, err := packages.Load(exported.Config, "pattern=a")
if err != nil {
t.Fatal(err)
}
graph, _ := importGraph(initial)
wantGraph := `
* a
`[1:]
if graph != wantGraph {
t.Errorf("wrong import graph: got <<%s>>, want <<%s>>", graph, wantGraph)
}
}
func TestConfigDefaultEnv(t *testing.T) { packagestest.TestAll(t, testConfigDefaultEnv) }
func testConfigDefaultEnv(t *testing.T, exporter packagestest.Exporter) {
const driverJSON = `{
"Roots": ["gopackagesdriver"],
"Packages": [{"ID": "gopackagesdriver", "Name": "gopackagesdriver"}]
}`
var (
pathKey string
driverScript packagestest.Writer
)
switch runtime.GOOS {
case "android":
t.Skip("doesn't run on android")
case "windows":
// TODO(jayconrod): write an equivalent batch script for windows.
// Hint: "type" can be used to read a file to stdout.
t.Skip("test requires sh")
case "plan9":
pathKey = "path"
driverScript = packagestest.Script(`#!/bin/rc
cat <<'EOF'
` + driverJSON + `
EOF
`)
default:
pathKey = "PATH"
driverScript = packagestest.Script(`#!/bin/sh
cat - <<'EOF'
` + driverJSON + `
EOF
`)
}
exported := packagestest.Export(t, exporter, []packagestest.Module{{
Name: "golang.org/fake",
Files: map[string]interface{}{
"bin/gopackagesdriver": driverScript,
"golist/golist.go": "package golist",
}}})
defer exported.Cleanup()
driver := exported.File("golang.org/fake", "bin/gopackagesdriver")
binDir := filepath.Dir(driver)
if err := os.Chmod(driver, 0755); err != nil {
t.Fatal(err)
}
path, ok := os.LookupEnv(pathKey)
var pathWithDriver string
if ok {
pathWithDriver = binDir + string(os.PathListSeparator) + path
} else {
pathWithDriver = binDir
}
for _, test := range []struct {
desc string
path string
driver string
wantIDs string
}{
{
desc: "driver_off",
path: pathWithDriver,
driver: "off",
wantIDs: "[golist]",
}, {
desc: "driver_unset",
path: pathWithDriver,
driver: "",
wantIDs: "[gopackagesdriver]",
}, {
desc: "driver_set",
path: "",
driver: driver,
wantIDs: "[gopackagesdriver]",
},
} {
t.Run(test.desc, func(t *testing.T) {
oldPath := os.Getenv(pathKey)
os.Setenv(pathKey, test.path)
defer os.Setenv(pathKey, oldPath)
// Clone exported.Config
config := exported.Config
config.Env = append([]string{}, exported.Config.Env...)
config.Env = append(config.Env, "GOPACKAGESDRIVER="+test.driver)
pkgs, err := packages.Load(exported.Config, "golist")
if err != nil {
t.Fatal(err)
}
gotIds := make([]string, len(pkgs))
for i, pkg := range pkgs {
gotIds[i] = pkg.ID
}
if fmt.Sprint(pkgs) != test.wantIDs {
t.Errorf("got %v; want %v", gotIds, test.wantIDs)
}
})
}
}
// This test that a simple x test package layout loads correctly.
// There was a bug in go list where it returned multiple copies of the same
// package (specifically in this case of golang.org/fake/a), and this triggered
// a bug in go/packages where it would leave an empty entry in the root package
// list. This would then cause a nil pointer crash.
// This bug was triggered by the simple package layout below, and thus this
// test will make sure the bug remains fixed.
func TestBasicXTest(t *testing.T) { packagestest.TestAll(t, testBasicXTest) }
func testBasicXTest(t *testing.T, exporter packagestest.Exporter) {
exported := packagestest.Export(t, exporter, []packagestest.Module{{
Name: "golang.org/fake",
Files: map[string]interface{}{
"a/a.go": `package a;`,
"a/a_test.go": `package a_test;`,
}}})
defer exported.Cleanup()
exported.Config.Mode = packages.LoadFiles
exported.Config.Tests = true
_, err := packages.Load(exported.Config, "golang.org/fake/a")
if err != nil {
t.Fatal(err)
}
}
func TestErrorMissingFile(t *testing.T) { packagestest.TestAll(t, testErrorMissingFile) }
func testErrorMissingFile(t *testing.T, exporter packagestest.Exporter) {
exported := packagestest.Export(t, exporter, []packagestest.Module{{
Name: "golang.org/fake",
Files: map[string]interface{}{
"a/a_test.go": `package a;`,
}}})
defer exported.Cleanup()
exported.Config.Mode = packages.LoadSyntax
exported.Config.Tests = false
pkgs, err := packages.Load(exported.Config, "missing.go")
if err != nil {
t.Fatal(err)
}
if len(pkgs) == 0 && runtime.GOOS == "windows" {
t.Skip("Issue #31344: the ad-hoc command-line-arguments package isn't created on windows")
}
if len(pkgs) != 1 || (pkgs[0].PkgPath != "command-line-arguments" && pkgs[0].PkgPath != "missing.go") {
t.Fatalf("packages.Load: want [command-line-arguments] or [missing.go], got %v", pkgs)
}
if len(pkgs[0].Errors) == 0 {
t.Errorf("result of Load: want package with errors, got none: %+v", pkgs[0])
}
}
func TestReturnErrorWhenUsingNonGoFiles(t *testing.T) {
packagestest.TestAll(t, testReturnErrorWhenUsingNonGoFiles)
}
func testReturnErrorWhenUsingNonGoFiles(t *testing.T, exporter packagestest.Exporter) {
exported := packagestest.Export(t, exporter, []packagestest.Module{{
Name: "golang.org/gopatha",
Files: map[string]interface{}{
"a/a.go": `package a`,
}}, {
Name: "golang.org/gopathb",
Files: map[string]interface{}{
"b/b.c": `package b`,
}}})
defer exported.Cleanup()
config := packages.Config{Env: append(os.Environ(), "GOPACKAGESDRIVER=off")}
pkgs, err := packages.Load(&config, "b/b.c")
if err != nil {
return
}
// Go <1.14 calls the package command-line-arguments while Go 1.14+ uses the file names.
if len(pkgs) != 1 || (pkgs[0].PkgPath != "command-line-arguments" && pkgs[0].PkgPath != "b/b.c") {
t.Fatalf("packages.Load: want [command-line-arguments] or [b/b.c], got %v", pkgs)
}
if len(pkgs[0].Errors) != 1 {
t.Fatalf("result of Load: want package with one error, got: %+v", pkgs[0])
}
}
func TestReturnErrorWhenUsingGoFilesInMultipleDirectories(t *testing.T) {
packagestest.TestAll(t, testReturnErrorWhenUsingGoFilesInMultipleDirectories)
}
func testReturnErrorWhenUsingGoFilesInMultipleDirectories(t *testing.T, exporter packagestest.Exporter) {
exported := packagestest.Export(t, exporter, []packagestest.Module{{
Name: "golang.org/gopatha",
Files: map[string]interface{}{
"a/a.go": `package a`,
"b/b.go": `package b`,
}}})
defer exported.Cleanup()
want := "named files must all be in one directory"
pkgs, err := packages.Load(exported.Config, exported.File("golang.org/gopatha", "a/a.go"), exported.File("golang.org/gopatha", "b/b.go"))
if err != nil {
// Check if the error returned is the one we expected.
if !strings.Contains(err.Error(), want) {
t.Fatalf("want error message: %s, got: %s", want, err.Error())
}
return
}
if len(pkgs) != 1 || pkgs[0].PkgPath != "command-line-arguments" {
t.Fatalf("packages.Load: want [command-line-arguments], got %v", pkgs)
}
if len(pkgs[0].Errors) != 1 {
t.Fatalf("result of Load: want package with one error, got: %+v", pkgs[0])
}
got := pkgs[0].Errors[0].Error()
if !strings.Contains(got, want) {
t.Fatalf("want error message: %s, got: %s", want, got)
}
}
func TestReturnErrorForUnexpectedDirectoryLayout(t *testing.T) {
packagestest.TestAll(t, testReturnErrorForUnexpectedDirectoryLayout)
}
func testReturnErrorForUnexpectedDirectoryLayout(t *testing.T, exporter packagestest.Exporter) {
exported := packagestest.Export(t, exporter, []packagestest.Module{{
Name: "golang.org/gopatha",
Files: map[string]interface{}{
"a/testdata/a.go": `package a; import _ "b"`,
"a/vendor/b/b.go": `package b; import _ "fmt"`,
}}})
defer exported.Cleanup()
want := "unexpected directory layout"
// triggering this error requires a relative package path
exported.Config.Dir = filepath.Dir(exported.File("golang.org/gopatha", "a/testdata/a.go"))
pkgs, err := packages.Load(exported.Config, ".")
// This error doesn't seem to occur in module mode; so only
// complain if we get zero packages while also getting no error.
if err == nil {
if len(pkgs) == 0 {
// TODO(dh): we'll need to expand on the error check if/when Go stops emitting this error
t.Fatalf("want error, got nil")
}
return
}
// Check if the error returned is the one we expected.
if !strings.Contains(err.Error(), want) {
t.Fatalf("want error message: %s, got: %s", want, err.Error())
}
}
func TestMissingDependency(t *testing.T) { packagestest.TestAll(t, testMissingDependency) }
func testMissingDependency(t *testing.T, exporter packagestest.Exporter) {
exported := packagestest.Export(t, exporter, []packagestest.Module{{
Name: "golang.org/fake",
Files: map[string]interface{}{
"a/a.go": `package a; import _ "this/package/doesnt/exist"`,
}}})
defer exported.Cleanup()
exported.Config.Mode = packages.LoadAllSyntax
pkgs, err := packages.Load(exported.Config, "golang.org/fake/a")
if err != nil {
t.Fatal(err)
}
if len(pkgs) != 1 && pkgs[0].PkgPath != "golang.org/fake/a" {
t.Fatalf("packages.Load: want [golang.org/fake/a], got %v", pkgs)
}
if len(pkgs[0].Errors) == 0 {
t.Errorf("result of Load: want package with errors, got none: %+v", pkgs[0])
}
}
func TestAdHocContains(t *testing.T) { packagestest.TestAll(t, testAdHocContains) }
func testAdHocContains(t *testing.T, exporter packagestest.Exporter) {
exported := packagestest.Export(t, exporter, []packagestest.Module{{
Name: "golang.org/fake",
Files: map[string]interface{}{
"a/a.go": `package a;`,
}}})
defer exported.Cleanup()
tmpfile, err := ioutil.TempFile("", "adhoc*.go")
filename := tmpfile.Name()
if err != nil {
t.Fatal(err)
}
fmt.Fprint(tmpfile, `package main; import "fmt"; func main() { fmt.Println("time for coffee") }`)
if err := tmpfile.Close(); err != nil {
t.Fatal(err)
}
defer func() {
if err := os.Remove(filename); err != nil {
t.Fatal(err)
}
}()
exported.Config.Mode = packages.NeedImports | packages.NeedFiles
pkgs, err := packages.Load(exported.Config, "file="+filename)
if err != nil {
t.Fatal(err)
}
if len(pkgs) != 1 && pkgs[0].PkgPath != "command-line-arguments" {
t.Fatalf("packages.Load: want [command-line-arguments], got %v", pkgs)
}
pkg := pkgs[0]
if _, ok := pkg.Imports["fmt"]; !ok || len(pkg.Imports) != 1 {
t.Fatalf("Imports of loaded package: want [fmt], got %v", pkg.Imports)
}
if len(pkg.GoFiles) != 1 || pkg.GoFiles[0] != filename {
t.Fatalf("GoFiles of loaded package: want [%s], got %v", filename, pkg.GoFiles)
}
}
func TestCgoNoCcompiler(t *testing.T) { packagestest.TestAll(t, testCgoNoCcompiler) }
func testCgoNoCcompiler(t *testing.T, exporter packagestest.Exporter) {
exported := packagestest.Export(t, exporter, []packagestest.Module{{
Name: "golang.org/fake",
Files: map[string]interface{}{
"a/a.go": `package a
import "net/http"
const A = http.MethodGet
`,
}}})
defer exported.Cleanup()
// Explicitly enable cgo but configure a nonexistent C compiler.
exported.Config.Env = append(exported.Config.Env, "CGO_ENABLED=1", "CC=doesnotexist")
exported.Config.Mode = packages.LoadAllSyntax
initial, err := packages.Load(exported.Config, "golang.org/fake/a")
if err != nil {
t.Fatal(err)
}
// Check value of a.A.
a := initial[0]
aA := constant(a, "A")
if aA == nil {
t.Fatalf("a.A: got nil")
}
got := aA.Val().String()
if got != "\"GET\"" {
t.Errorf("a.A: got %s, want %s", got, "\"GET\"")
}
}
func TestCgoMissingFile(t *testing.T) { packagestest.TestAll(t, testCgoMissingFile) }
func testCgoMissingFile(t *testing.T, exporter packagestest.Exporter) {
exported := packagestest.Export(t, exporter, []packagestest.Module{{
Name: "golang.org/fake",
Files: map[string]interface{}{
"a/a.go": `package a
// #include "foo.h"
import "C"
const A = 4
`,
}}})
defer exported.Cleanup()
// Explicitly enable cgo.
exported.Config.Env = append(exported.Config.Env, "CGO_ENABLED=1")
exported.Config.Mode = packages.LoadAllSyntax
initial, err := packages.Load(exported.Config, "golang.org/fake/a")
if err != nil {
t.Fatal(err)
}
// Check value of a.A.
a := initial[0]
aA := constant(a, "A")
if aA == nil {
t.Fatalf("a.A: got nil")
}
got := aA.Val().String()
if got != "4" {
t.Errorf("a.A: got %s, want %s", got, "4")
}
}
func TestIssue32814(t *testing.T) { packagestest.TestAll(t, testIssue32814) }
func testIssue32814(t *testing.T, exporter packagestest.Exporter) {
exported := packagestest.Export(t, exporter, []packagestest.Module{{
Name: "golang.org/fake",
Files: map[string]interface{}{}}})
defer exported.Cleanup()
exported.Config.Mode = packages.NeedName | packages.NeedTypes | packages.NeedSyntax | packages.NeedTypesInfo | packages.NeedTypesSizes
pkgs, err := packages.Load(exported.Config, "fmt")
if err != nil {
t.Fatal(err)
}
if len(pkgs) != 1 && pkgs[0].PkgPath != "fmt" {
t.Fatalf("packages.Load: want [fmt], got %v", pkgs)
}
pkg := pkgs[0]
if len(pkg.Errors) != 0 {
t.Fatalf("Errors for fmt pkg: got %v, want none", pkg.Errors)
}
if !pkg.Types.Complete() {
t.Fatalf("Types.Complete() for fmt pkg: got %v, want true", pkgs[0].Types.Complete())
}
}
func TestLoadTypesInfoWithoutNeedDeps(t *testing.T) {
packagestest.TestAll(t, testLoadTypesInfoWithoutNeedDeps)
}
func testLoadTypesInfoWithoutNeedDeps(t *testing.T, exporter packagestest.Exporter) {
exported := packagestest.Export(t, exporter, []packagestest.Module{{
Name: "golang.org/fake",
Files: map[string]interface{}{
"a/a.go": `package a; import _ "golang.org/fake/b"`,
"b/b.go": `package b`,
}}})
defer exported.Cleanup()
exported.Config.Mode = packages.NeedTypes | packages.NeedTypesInfo | packages.NeedImports
pkgs, err := packages.Load(exported.Config, "golang.org/fake/a")
if err != nil {
t.Fatal(err)
}
pkg := pkgs[0]
if pkg.IllTyped {
t.Fatal("Loaded package is ill typed")
}
const expectedImport = "golang.org/fake/b"
if _, ok := pkg.Imports[expectedImport]; !ok || len(pkg.Imports) != 1 {
t.Fatalf("Imports of loaded package: want [%s], got %v", expectedImport, pkg.Imports)
}
}
func TestLoadWithNeedDeps(t *testing.T) {
packagestest.TestAll(t, testLoadWithNeedDeps)
}
func testLoadWithNeedDeps(t *testing.T, exporter packagestest.Exporter) {
exported := packagestest.Export(t, exporter, []packagestest.Module{{
Name: "golang.org/fake",
Files: map[string]interface{}{
"a/a.go": `package a; import _ "golang.org/fake/b"`,
"b/b.go": `package b; import _ "golang.org/fake/c"`,
"c/c.go": `package c`,
}}})
defer exported.Cleanup()
exported.Config.Mode = packages.NeedTypes | packages.NeedTypesInfo | packages.NeedImports | packages.NeedDeps
pkgs, err := packages.Load(exported.Config, "golang.org/fake/a")
if err != nil {
t.Fatal(err)
}
if len(pkgs) != 1 {
t.Fatalf("Expected 1 package, got %d", len(pkgs))
}
pkgA := pkgs[0]
if pkgA.IllTyped {
t.Fatal("Loaded package is ill typed")
}
pkgB := pkgA.Imports["golang.org/fake/b"]
if pkgB == nil || len(pkgA.Imports) != 1 {
t.Fatalf("Imports of loaded package 'a' are invalid: %v", pkgA.Imports)
}
if pkgB.Types == nil || !pkgB.Types.Complete() || pkgB.TypesInfo == nil {
t.Fatalf("Types of package 'b' are nil or incomplete: %v, %v", pkgB.Types, pkgB.TypesInfo)
}
pkgC := pkgB.Imports["golang.org/fake/c"]
if pkgC == nil || len(pkgB.Imports) != 1 {
t.Fatalf("Imports of loaded package 'c' are invalid: %v", pkgB.Imports)
}
if pkgC.Types == nil || !pkgC.Types.Complete() || pkgC.TypesInfo == nil {
t.Fatalf("Types of package 'b' are nil or incomplete: %v, %v", pkgC.Types, pkgC.TypesInfo)
}
}
func TestImpliedLoadMode(t *testing.T) {
packagestest.TestAll(t, testImpliedLoadMode)
}
func testImpliedLoadMode(t *testing.T, exporter packagestest.Exporter) {
exported := packagestest.Export(t, exporter, []packagestest.Module{{
Name: "golang.org/fake",
Files: map[string]interface{}{
"a/a.go": `package a; import _ "golang.org/fake/b"`,
"b/b.go": `package b`,
}}})
defer exported.Cleanup()
exported.Config.Mode = packages.NeedTypes | packages.NeedTypesInfo
pkgs, err := packages.Load(exported.Config, "golang.org/fake/a")
if err != nil {
t.Fatal(err)
}
if len(pkgs) != 1 {
t.Fatalf("Expected 1 package, got %d", len(pkgs))
}
pkg := pkgs[0]
if pkg.IllTyped {
t.Fatalf("Loaded package is ill typed: %v", pkg.Errors)
}
// Check that packages.NeedTypesInfo worked well.
if !pkg.Types.Complete() {
t.Fatalf("Loaded package types are incomplete")
}
// Check that implied packages.NeedImports by packages.NeedTypesInfo
// didn't add Imports.
if len(pkg.Imports) != 0 {
t.Fatalf("Package imports weren't requested but were returned: %v", pkg.Imports)
}
}
func TestIssue35331(t *testing.T) {
packagestest.TestAll(t, testIssue35331)
}
func testIssue35331(t *testing.T, exporter packagestest.Exporter) {
exported := packagestest.Export(t, exporter, []packagestest.Module{{
Name: "golang.org/fake",
}})
defer exported.Cleanup()
exported.Config.Mode = packages.NeedName | packages.NeedFiles | packages.NeedCompiledGoFiles |
packages.NeedImports | packages.NeedDeps | packages.NeedSyntax
exported.Config.Tests = false
pkgs, err := packages.Load(exported.Config, "strconv")
if err != nil {
t.Fatal(err)
}
if len(pkgs) != 1 {
t.Fatalf("Expected 1 package, got %v", pkgs)
}
packages.Visit(pkgs, func(pkg *packages.Package) bool {
if len(pkg.Errors) > 0 {
t.Errorf("Expected no errors in package %q, got %v", pkg.ID, pkg.Errors)
}
if len(pkg.Syntax) == 0 && pkg.ID != "unsafe" {
t.Errorf("Expected syntax on package %q, got none.", pkg.ID)
}
return true
}, nil)
}
func TestMultiplePackageVersionsIssue36188(t *testing.T) {
packagestest.TestAll(t, testMultiplePackageVersionsIssue36188)
}
func testMultiplePackageVersionsIssue36188(t *testing.T, exporter packagestest.Exporter) {
exported := packagestest.Export(t, exporter, []packagestest.Module{{
Name: "golang.org/fake",
Files: map[string]interface{}{
"a/a.go": `package a; import _ "golang.org/fake/b"`,
"b/b.go": `package main`,
}}})
pkgs, err := packages.Load(exported.Config, "golang.org/fake/a", "golang.org/fake/b")
if err != nil {
t.Fatal(err)
}
sort.Slice(pkgs, func(i, j int) bool { return pkgs[i].ID < pkgs[j].ID })
if len(pkgs) != 2 {
t.Fatalf("expected two packages, got %v", pkgs)
}
if pkgs[0].ID != "golang.org/fake/a" && pkgs[1].ID != "golang.org/fake/b" {
t.Fatalf(`expected (sorted) IDs "golang.org/fake/a" and "golang.org/fake/b", got %q and %q`,
pkgs[0].ID, pkgs[1].ID)
}
if pkgs[0].Errors == nil {
t.Errorf(`expected error on package "golang.org/fake/a", got none`)
}
if pkgs[1].Errors != nil {
t.Errorf(`expected no errors on package "golang.org/fake/b", got %v`, pkgs[1].Errors)
}
defer exported.Cleanup()
}
func TestLoadModeStrings(t *testing.T) {
testcases := []struct {
mode packages.LoadMode
expected string
}{
{
packages.LoadMode(0),
"LoadMode(0)",
},
{
packages.NeedName,
"LoadMode(NeedName)",
},
{
packages.NeedFiles,
"LoadMode(NeedFiles)",
},
{
packages.NeedCompiledGoFiles,
"LoadMode(NeedCompiledGoFiles)",
},
{
packages.NeedImports,
"LoadMode(NeedImports)",
},
{
packages.NeedDeps,
"LoadMode(NeedDeps)",
},
{
packages.NeedExportsFile,
"LoadMode(NeedExportsFile)",
},
{
packages.NeedTypes,
"LoadMode(NeedTypes)",
},
{
packages.NeedSyntax,
"LoadMode(NeedSyntax)",
},
{
packages.NeedTypesInfo,
"LoadMode(NeedTypesInfo)",
},
{
packages.NeedTypesSizes,
"LoadMode(NeedTypesSizes)",
},
{
packages.NeedName | packages.NeedExportsFile,
"LoadMode(NeedName|NeedExportsFile)",
},
{
packages.NeedName | packages.NeedFiles | packages.NeedCompiledGoFiles | packages.NeedImports | packages.NeedDeps | packages.NeedExportsFile | packages.NeedTypes | packages.NeedSyntax | packages.NeedTypesInfo | packages.NeedTypesSizes,
"LoadMode(NeedName|NeedFiles|NeedCompiledGoFiles|NeedImports|NeedDeps|NeedExportsFile|NeedTypes|NeedSyntax|NeedTypesInfo|NeedTypesSizes)",
},
{
packages.NeedName | 8192,
"LoadMode(NeedName|Unknown)",
},
{
4096,
"LoadMode(Unknown)",
},
}
for tcInd, tc := range testcases {
t.Run(fmt.Sprintf("test-%d", tcInd), func(t *testing.T) {
actual := tc.mode.String()
if tc.expected != actual {
t.Errorf("want %#v, got %#v", tc.expected, actual)
}
})
}
}
func TestCycleImportStack(t *testing.T) {
packagestest.TestAll(t, testCycleImportStack)
}
func testCycleImportStack(t *testing.T, exporter packagestest.Exporter) {
exported := packagestest.Export(t, exporter, []packagestest.Module{{
Name: "golang.org/fake",
Files: map[string]interface{}{
"a/a.go": `package a; import _ "golang.org/fake/b"`,
"b/b.go": `package b; import _ "golang.org/fake/a"`,
}}})
defer exported.Cleanup()
exported.Config.Mode = packages.NeedName | packages.NeedImports
pkgs, err := packages.Load(exported.Config, "golang.org/fake/a")
if err != nil {
t.Fatal(err)
}
if len(pkgs) != 1 {
t.Fatalf("Expected 1 package, got %v", pkgs)
}
pkg := pkgs[0]
if len(pkg.Errors) != 1 {
t.Fatalf("Expected one error in package, got %v", pkg.Errors)
}
expected := "import cycle not allowed: import stack: [golang.org/fake/a golang.org/fake/b golang.org/fake/a]"
if pkg.Errors[0].Msg != expected {
t.Fatalf("Expected error %q, got %q", expected, pkg.Errors[0].Msg)
}
}
func TestForTestField(t *testing.T) {
packagestest.TestAll(t, testForTestField)
}
func testForTestField(t *testing.T, exporter packagestest.Exporter) {
exported := packagestest.Export(t, exporter, []packagestest.Module{{
Name: "golang.org/fake",
Files: map[string]interface{}{
"a/a.go": `package a; func hello() {};`,
"a/a_test.go": `package a; import "testing"; func TestA1(t *testing.T) {};`,
"a/x_test.go": `package a_test; import "testing"; func TestA2(t *testing.T) {};`,
}}})
defer exported.Cleanup()
// Add overlays to make sure they don't affect anything.
exported.Config.Overlay = map[string][]byte{
"a/a_test.go": []byte(`package a; import "testing"; func TestA1(t *testing.T) { hello(); };`),
"a/x_test.go": []byte(`package a_test; import "testing"; func TestA2(t *testing.T) { hello(); };`),
}
exported.Config.Tests = true
exported.Config.Mode = packages.NeedName | packages.NeedImports
forTest := "golang.org/fake/a"
pkgs, err := packages.Load(exported.Config, forTest)
if err != nil {
t.Fatal(err)
}
if len(pkgs) != 4 {
t.Errorf("expected 4 packages, got %v", len(pkgs))
}
for _, pkg := range pkgs {
var hasTestFile bool
for _, f := range pkg.CompiledGoFiles {
if strings.Contains(f, "a_test.go") || strings.Contains(f, "x_test.go") {
hasTestFile = true
break
}
}
if !hasTestFile {
continue
}
got := packagesinternal.GetForTest(pkg)
if got != forTest {
t.Errorf("expected %q, got %q", forTest, got)
}
}
}
func TestIssue37529(t *testing.T) {
packagestest.TestAll(t, testIssue37529)
}
func testIssue37529(t *testing.T, exporter packagestest.Exporter) {
// Tests #37529. When automatic vendoring is triggered, and we try to determine
// the module root dir for a new overlay package, we previously would do a go list -m all,
// which is incompatible with automatic vendoring.
exported := packagestest.Export(t, exporter, []packagestest.Module{{
Name: "golang.org/fake",
Files: map[string]interface{}{
"c/c2.go": `package c`,
"a/a.go": `package a; import "b.com/b"; const A = b.B`,
"vendor/b.com/b/b.go": `package b; const B = 4`,
}}})
rootDir := filepath.Dir(filepath.Dir(exported.File("golang.org/fake", "a/a.go")))
exported.Config.Overlay = map[string][]byte{
filepath.Join(rootDir, "c/c.go"): []byte(`package c; import "golang.org/fake/a"; const C = a.A`),
}
exported.Config.Env = append(exported.Config.Env, "GOFLAGS=-mod=vendor")
exported.Config.Mode = packages.LoadAllSyntax
defer exported.Cleanup()
initial, err := packages.Load(exported.Config, "golang.org/fake/c")
if err != nil {
t.Fatal(err)
}
// Check value of a.A.
a := initial[0]
aA := constant(a, "C")
if aA == nil {
t.Fatalf("a.A: got nil")
}
got := aA.Val().String()
if got != "4" {
t.Errorf("a.A: got %s, want %s", got, "4")
}
}
func errorMessages(errors []packages.Error) []string {
var msgs []string
for _, err := range errors {
msgs = append(msgs, err.Msg)
}
return msgs
}
func srcs(p *packages.Package) []string {
return cleanPaths(append(p.GoFiles, p.OtherFiles...))
}
// cleanPaths attempts to reduce path names to stable forms
func cleanPaths(paths []string) []string {
result := make([]string, len(paths))
for i, src := range paths {
// If the source file doesn't have an extension like .go or .s,
// it comes from GOCACHE. The names there aren't predictable.
name := filepath.Base(src)
if !strings.Contains(name, ".") {
result[i] = fmt.Sprintf("%d.go", i) // make cache names predictable
} else {
result[i] = name
}
}
return result
}
// importGraph returns the import graph as a user-friendly string,
// and a map containing all packages keyed by ID.
func importGraph(initial []*packages.Package) (string, map[string]*packages.Package) {
out := new(bytes.Buffer)
initialSet := make(map[*packages.Package]bool)
for _, p := range initial {
initialSet[p] = true
}
// We can't use Visit because we need to prune
// the traversal of specific edges, not just nodes.
var nodes, edges []string
res := make(map[string]*packages.Package)
seen := make(map[*packages.Package]bool)
var visit func(p *packages.Package)
visit = func(p *packages.Package) {
if !seen[p] {
seen[p] = true
if res[p.ID] != nil {
panic("duplicate ID: " + p.ID)
}
res[p.ID] = p
star := ' ' // mark initial packages with a star
if initialSet[p] {
star = '*'
}
nodes = append(nodes, fmt.Sprintf("%c %s", star, p.ID))
// To avoid a lot of noise,
// we prune uninteresting dependencies of testmain packages,
// which we identify by this import:
isTestMain := p.Imports["testing/internal/testdeps"] != nil
for _, imp := range p.Imports {
if isTestMain {
switch imp.ID {
case "os", "reflect", "testing", "testing/internal/testdeps":
continue
}
}
// math/bits took on a dependency on unsafe in 1.12, which breaks some
// tests. As a short term hack, prune that edge.
// ditto for ("errors", "internal/reflectlite") in 1.13.
// TODO(matloob): think of a cleaner solution, or remove math/bits from the test.
if p.ID == "math/bits" && imp.ID == "unsafe" {
continue
}
edges = append(edges, fmt.Sprintf("%s -> %s", p, imp))
visit(imp)
}
}
}
for _, p := range initial {
visit(p)
}
// Sort, ignoring leading optional star prefix.
sort.Slice(nodes, func(i, j int) bool { return nodes[i][2:] < nodes[j][2:] })
for _, node := range nodes {
fmt.Fprintf(out, "%s\n", node)
}
sort.Strings(edges)
for _, edge := range edges {
fmt.Fprintf(out, " %s\n", edge)
}
return out.String(), res
}
func constant(p *packages.Package, name string) *types.Const {
if p == nil || p.Types == nil {
return nil
}
c := p.Types.Scope().Lookup(name)
if c == nil {
return nil
}
return c.(*types.Const)
}
func copyAll(srcPath, dstPath string) error {
return filepath.Walk(srcPath, func(path string, info os.FileInfo, _ error) error {
if info.IsDir() {
return nil
}
contents, err := ioutil.ReadFile(path)
if err != nil {
return err
}
rel, err := filepath.Rel(srcPath, path)
if err != nil {
return err
}
dstFilePath := strings.Replace(filepath.Join(dstPath, rel), "definitelynot_go.mod", "go.mod", -1)
if err := os.MkdirAll(filepath.Dir(dstFilePath), 0755); err != nil {
return err
}
if err := ioutil.WriteFile(dstFilePath, contents, 0644); err != nil {
return err
}
return nil
})
}