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
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
|
// Copyright 2017 Google Inc. All rights reserved.
//
// 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.
// This file provides a bpfix command-line library
// TODO(jeffrygaston) should this file be consolidated with bpfmt.go?
package cmd
import (
"bytes"
"flag"
"fmt"
"io"
"io/ioutil"
"os"
"os/exec"
"path/filepath"
"github.com/google/blueprint/parser"
"android/soong/bpfix/bpfix"
)
var (
// main operation modes
list = flag.Bool("l", false, "list files whose formatting differs from bpfmt's")
write = flag.Bool("w", false, "write result to (source) file instead of stdout")
doDiff = flag.Bool("d", false, "display diffs instead of rewriting files")
)
var (
exitCode = 0
)
func report(err error) {
fmt.Fprintln(os.Stderr, err)
exitCode = 2
}
func openAndProcess(filename string, out io.Writer, fixRequest bpfix.FixRequest) error {
f, err := os.Open(filename)
if err != nil {
return err
}
defer f.Close()
return processFile(filename, f, out, fixRequest)
}
// If in == nil, the source is the contents of the file with the given filename.
func processFile(filename string, in io.Reader, out io.Writer, fixRequest bpfix.FixRequest) error {
// load the input file
src, err := ioutil.ReadAll(in)
if err != nil {
return err
}
r := bytes.NewBuffer(append([]byte(nil), src...))
file, errs := parser.Parse(filename, r, parser.NewScope(nil))
if len(errs) > 0 {
for _, err := range errs {
fmt.Fprintln(os.Stderr, err)
}
return fmt.Errorf("%d parsing errors", len(errs))
}
// compute and apply any requested fixes
fixer := bpfix.NewFixer(file)
file, err = fixer.Fix(fixRequest)
if err != nil {
return err
}
// output the results
res, err := parser.Print(file)
if err != nil {
return err
}
if !bytes.Equal(src, res) {
// contents have changed
if *list {
fmt.Fprintln(out, filename)
}
if *write {
err = ioutil.WriteFile(filename, res, 0644)
if err != nil {
return err
}
}
if *doDiff {
data, err := diff(src, res)
if err != nil {
return fmt.Errorf("computing diff: %s", err)
}
fmt.Printf("diff %s bpfix/%s\n", filename, filename)
out.Write(data)
}
}
if !*list && !*write && !*doDiff {
_, err = out.Write(res)
}
return err
}
func makeFileVisitor(fixRequest bpfix.FixRequest) func(string, os.FileInfo, error) error {
return func(path string, f os.FileInfo, err error) error {
if err == nil && (f.Name() == "Blueprints" || f.Name() == "Android.bp") {
err = openAndProcess(path, os.Stdout, fixRequest)
}
if err != nil {
report(err)
}
return nil
}
}
func walkDir(path string, fixRequest bpfix.FixRequest) {
filepath.Walk(path, makeFileVisitor(fixRequest))
}
func Run() {
flag.Parse()
fixRequest := bpfix.NewFixRequest().AddAll()
if flag.NArg() == 0 {
if *write {
fmt.Fprintln(os.Stderr, "error: cannot use -w with standard input")
exitCode = 2
return
}
if err := processFile("<standard input>", os.Stdin, os.Stdout, fixRequest); err != nil {
report(err)
}
return
}
for i := 0; i < flag.NArg(); i++ {
path := flag.Arg(i)
switch dir, err := os.Stat(path); {
case err != nil:
report(err)
case dir.IsDir():
walkDir(path, fixRequest)
default:
if err := openAndProcess(path, os.Stdout, fixRequest); err != nil {
report(err)
}
}
}
}
func diff(b1, b2 []byte) (data []byte, err error) {
f1, err := ioutil.TempFile("", "bpfix")
if err != nil {
return
}
defer os.Remove(f1.Name())
defer f1.Close()
f2, err := ioutil.TempFile("", "bpfix")
if err != nil {
return
}
defer os.Remove(f2.Name())
defer f2.Close()
f1.Write(b1)
f2.Write(b2)
data, err = exec.Command("diff", "-u", f1.Name(), f2.Name()).CombinedOutput()
if len(data) > 0 {
// diff exits with a non-zero status when the files don't match.
// Ignore that failure as long as we get output.
err = nil
}
return
}
|
