forked from hashicorp/packer
/
post-processor.go
148 lines (127 loc) · 3.47 KB
/
post-processor.go
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
package checksum
import (
"crypto/md5"
"crypto/sha1"
"crypto/sha256"
"crypto/sha512"
"fmt"
"hash"
"io"
"os"
"path/filepath"
"github.com/hashicorp/packer/common"
"github.com/hashicorp/packer/helper/config"
"github.com/hashicorp/packer/packer"
"github.com/hashicorp/packer/template/interpolate"
)
type Config struct {
common.PackerConfig `mapstructure:",squash"`
Keep bool `mapstructure:"keep_input_artifact"`
ChecksumTypes []string `mapstructure:"checksum_types"`
OutputPath string `mapstructure:"output"`
ctx interpolate.Context
}
type PostProcessor struct {
config Config
}
type outputPathTemplate struct {
BuildName string
BuilderType string
ChecksumType string
}
func getHash(t string) hash.Hash {
var h hash.Hash
switch t {
case "md5":
h = md5.New()
case "sha1":
h = sha1.New()
case "sha224":
h = sha256.New224()
case "sha256":
h = sha256.New()
case "sha384":
h = sha512.New384()
case "sha512":
h = sha512.New()
}
return h
}
func (p *PostProcessor) Configure(raws ...interface{}) error {
err := config.Decode(&p.config, &config.DecodeOpts{
Interpolate: true,
InterpolateContext: &p.config.ctx,
InterpolateFilter: &interpolate.RenderFilter{
Exclude: []string{"output"},
},
}, raws...)
if err != nil {
return err
}
errs := new(packer.MultiError)
if p.config.ChecksumTypes == nil {
p.config.ChecksumTypes = []string{"md5"}
}
for _, k := range p.config.ChecksumTypes {
if h := getHash(k); h == nil {
errs = packer.MultiErrorAppend(errs,
fmt.Errorf("Unrecognized checksum type: %s", k))
}
}
if p.config.OutputPath == "" {
p.config.OutputPath = "packer_{{.BuildName}}_{{.BuilderType}}_{{.ChecksumType}}.checksum"
}
if err = interpolate.Validate(p.config.OutputPath, &p.config.ctx); err != nil {
errs = packer.MultiErrorAppend(
errs, fmt.Errorf("Error parsing target template: %s", err))
}
if len(errs.Errors) > 0 {
return errs
}
return nil
}
func (p *PostProcessor) PostProcess(ui packer.Ui, artifact packer.Artifact) (packer.Artifact, bool, error) {
files := artifact.Files()
var h hash.Hash
newartifact := NewArtifact(artifact.Files())
opTpl := &outputPathTemplate{
BuildName: p.config.PackerBuildName,
BuilderType: p.config.PackerBuilderType,
}
for _, ct := range p.config.ChecksumTypes {
h = getHash(ct)
opTpl.ChecksumType = ct
p.config.ctx.Data = &opTpl
for _, art := range files {
checksumFile, err := interpolate.Render(p.config.OutputPath, &p.config.ctx)
if err != nil {
return nil, false, err
}
if _, err := os.Stat(checksumFile); err != nil {
newartifact.files = append(newartifact.files, checksumFile)
}
if err := os.MkdirAll(filepath.Dir(checksumFile), os.FileMode(0755)); err != nil {
return nil, false, fmt.Errorf("unable to create dir: %s", err.Error())
}
fw, err := os.OpenFile(checksumFile, os.O_WRONLY|os.O_APPEND|os.O_CREATE, os.FileMode(0644))
if err != nil {
return nil, false, fmt.Errorf("unable to create file %s: %s", checksumFile, err.Error())
}
fr, err := os.Open(art)
if err != nil {
fw.Close()
return nil, false, fmt.Errorf("unable to open file %s: %s", art, err.Error())
}
if _, err = io.Copy(h, fr); err != nil {
fr.Close()
fw.Close()
return nil, false, fmt.Errorf("unable to compute %s hash for %s", ct, art)
}
fr.Close()
fw.WriteString(fmt.Sprintf("%x\t%s\n", h.Sum(nil), filepath.Base(art)))
fw.Close()
h.Reset()
}
}
return newartifact, true, nil
}