/usr/share/gocode/src/github.com/golang/mock/mockgen/reflect.go is in golang-github-golang-mock-dev 0.0~git20150821.0.06883d9-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 | // Copyright 2012 Google Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package main
// This file contains the model construction by reflection.
import (
"bytes"
"encoding/gob"
"flag"
"io"
"io/ioutil"
"os"
"os/exec"
"path/filepath"
"runtime"
"text/template"
"github.com/golang/mock/mockgen/model"
)
var (
progOnly = flag.Bool("prog_only", false, "(reflect mode) Only generate the reflection program; write it to stdout.")
execOnly = flag.String("exec_only", "", "(reflect mode) If set, execute this reflection program.")
)
func Reflect(importPath string, symbols []string) (*model.Package, error) {
// TODO: sanity check arguments
progPath := *execOnly
if *execOnly == "" {
// We use TempDir instead of TempFile so we can control the filename.
tmpDir, err := ioutil.TempDir("", "gomock_reflect_")
if err != nil {
return nil, err
}
defer func() { os.RemoveAll(tmpDir) }()
const progSource = "prog.go"
var progBinary = "prog.bin"
if runtime.GOOS == "windows" {
// Windows won't execute a program unless it has a ".exe" suffix.
progBinary += ".exe"
}
// Generate program.
var program bytes.Buffer
data := reflectData{
ImportPath: importPath,
Symbols: symbols,
}
if err := reflectProgram.Execute(&program, &data); err != nil {
return nil, err
}
if *progOnly {
io.Copy(os.Stdout, &program)
os.Exit(0)
}
if err := ioutil.WriteFile(filepath.Join(tmpDir, progSource), program.Bytes(), 0600); err != nil {
return nil, err
}
// Build the program.
cmd := exec.Command("go", "build", "-o", progBinary, progSource)
cmd.Dir = tmpDir
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
if err := cmd.Run(); err != nil {
return nil, err
}
progPath = filepath.Join(tmpDir, progBinary)
}
// Run it.
cmd := exec.Command(progPath)
var stdout bytes.Buffer
cmd.Stdout = &stdout
cmd.Stderr = os.Stderr
if err := cmd.Run(); err != nil {
return nil, err
}
// Process output.
var pkg model.Package
if err := gob.NewDecoder(&stdout).Decode(&pkg); err != nil {
return nil, err
}
return &pkg, nil
}
type reflectData struct {
ImportPath string
Symbols []string
}
// This program reflects on an interface value, and prints the
// gob encoding of a model.Package to standard output.
// JSON doesn't work because of the model.Type interface.
var reflectProgram = template.Must(template.New("program").Parse(`
package main
import (
"encoding/gob"
"fmt"
"os"
"path"
"reflect"
"github.com/golang/mock/mockgen/model"
pkg_ {{printf "%q" .ImportPath}}
)
func main() {
its := []struct{
sym string
typ reflect.Type
}{
{{range .Symbols}}
{ {{printf "%q" .}}, reflect.TypeOf((*pkg_.{{.}})(nil)).Elem()},
{{end}}
}
pkg := &model.Package{
// NOTE: This behaves contrary to documented behaviour if the
// package name is not the final component of the import path.
// The reflect package doesn't expose the package name, though.
Name: path.Base({{printf "%q" .ImportPath}}),
}
for _, it := range its {
intf, err := model.InterfaceFromInterfaceType(it.typ)
if err != nil {
fmt.Fprintf(os.Stderr, "Reflection: %v\n", err)
os.Exit(1)
}
intf.Name = it.sym
pkg.Interfaces = append(pkg.Interfaces, intf)
}
if err := gob.NewEncoder(os.Stdout).Encode(pkg); err != nil {
fmt.Fprintf(os.Stderr, "gob encode: %v\n", err)
os.Exit(1)
}
}
`))
|