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
|
// Copyright (c) 2018 Cisco and/or its affiliates.
//
// 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
import (
"bytes"
"encoding/json"
"flag"
"fmt"
"io/ioutil"
"os"
"os/exec"
"path/filepath"
"strings"
"github.com/bennyscetbun/jsongo"
"github.com/sirupsen/logrus"
)
var (
inputFile = flag.String("input-file", "", "Input file with VPP API in JSON format.")
inputDir = flag.String("input-dir", ".", "Input directory with VPP API files in JSON format.")
outputDir = flag.String("output-dir", ".", "Output directory where package folders will be generated.")
includeAPIVer = flag.Bool("include-apiver", true, "Include APIVersion constant for each module.")
includeComments = flag.Bool("include-comments", false, "Include JSON API source in comments for each object.")
includeBinapiNames = flag.Bool("include-binapi-names", false, "Include binary API names in struct tag.")
includeServices = flag.Bool("include-services", false, "Include service interface with client implementation.")
continueOnError = flag.Bool("continue-onerror", false, "Continue with next file on error.")
debug = flag.Bool("debug", debugMode, "Enable debug mode.")
)
var debugMode = os.Getenv("DEBUG_BINAPI_GENERATOR") != ""
func main() {
flag.Parse()
if *debug {
logrus.SetLevel(logrus.DebugLevel)
}
if *inputFile == "" && *inputDir == "" {
fmt.Fprintln(os.Stderr, "ERROR: input-file or input-dir must be specified")
os.Exit(1)
}
if *inputFile != "" {
// process one input file
if err := generateFromFile(*inputFile, *outputDir); err != nil {
fmt.Fprintf(os.Stderr, "ERROR: code generation from %s failed: %v\n", *inputFile, err)
os.Exit(1)
}
} else {
// process all files in specified directory
files, err := getInputFiles(*inputDir)
if err != nil {
fmt.Fprintf(os.Stderr, "ERROR: code generation failed: %v\n", err)
os.Exit(1)
}
for _, file := range files {
if err := generateFromFile(file, *outputDir); err != nil {
fmt.Fprintf(os.Stderr, "ERROR: code generation from %s failed: %v\n", file, err)
if *continueOnError {
continue
}
os.Exit(1)
}
}
}
}
// getInputFiles returns all input files located in specified directory
func getInputFiles(inputDir string) (res []string, err error) {
files, err := ioutil.ReadDir(inputDir)
if err != nil {
return nil, fmt.Errorf("reading directory %s failed: %v", inputDir, err)
}
for _, f := range files {
if strings.HasSuffix(f.Name(), inputFileExt) {
res = append(res, filepath.Join(inputDir, f.Name()))
}
}
return res, nil
}
// generateFromFile generates Go package from one input JSON file
func generateFromFile(inputFile, outputDir string) error {
logf("generating from file: %s", inputFile)
logf("------------------------------------------------------------")
defer logf("------------------------------------------------------------")
ctx, err := getContext(inputFile, outputDir)
if err != nil {
return err
}
// prepare options
ctx.includeAPIVersion = *includeAPIVer
ctx.includeComments = *includeComments
ctx.includeBinapiNames = *includeBinapiNames
ctx.includeServices = *includeServices
// read API definition from input file
ctx.inputData, err = ioutil.ReadFile(ctx.inputFile)
if err != nil {
return fmt.Errorf("reading input file %s failed: %v", ctx.inputFile, err)
}
// parse JSON data into objects
jsonRoot := new(jsongo.JSONNode)
if err := json.Unmarshal(ctx.inputData, jsonRoot); err != nil {
return fmt.Errorf("unmarshalling JSON failed: %v", err)
}
ctx.packageData, err = parsePackage(ctx, jsonRoot)
if err != nil {
return fmt.Errorf("parsing package %s failed: %v", ctx.packageName, err)
}
// generate Go package code
var buf bytes.Buffer
if err := generatePackage(ctx, &buf); err != nil {
return fmt.Errorf("generating code for package %s failed: %v", ctx.packageName, err)
}
// create output directory
packageDir := filepath.Dir(ctx.outputFile)
if err := os.MkdirAll(packageDir, 06); err != nil {
return fmt.Errorf("creating output dir %s failed: %v", packageDir, err)
}
// write generated code to output file
if err := ioutil.WriteFile(ctx.outputFile, buf.Bytes(), 0666); err != nil {
return fmt.Errorf("writing to output file %s failed: %v", ctx.outputFile, err)
}
// go format the output file (fail probably means the output is not compilable)
cmd := exec.Command("gofmt", "-w", ctx.outputFile)
if output, err := cmd.CombinedOutput(); err != nil {
return fmt.Errorf("gofmt failed: %v\n%s", err, string(output))
}
// count number of lines in generated output file
cmd = exec.Command("wc", "-l", ctx.outputFile)
if output, err := cmd.CombinedOutput(); err != nil {
logf("wc command failed: %v\n%s", err, string(output))
} else {
logf("number of generated lines: %s", output)
}
return nil
}
func logf(f string, v ...interface{}) {
if *debug {
logrus.Debugf(f, v...)
}
}
|
