packer-cn/post-processor/compress/post-processor.go

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package compress
import (
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"archive/tar"
"compress/gzip"
"fmt"
"io"
"os"
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"github.com/mitchellh/packer/common"
"github.com/mitchellh/packer/helper/config"
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"github.com/mitchellh/packer/packer"
"github.com/mitchellh/packer/template/interpolate"
)
type Config struct {
common.PackerConfig `mapstructure:",squash"`
OutputPath string `mapstructure:"output"`
ctx interpolate.Context
}
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type PostProcessor struct {
config Config
}
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func (p *PostProcessor) Configure(raws ...interface{}) error {
p.config.Compression = -1
err := config.Decode(&p.config, &config.DecodeOpts{
Interpolate: true,
InterpolateFilter: &interpolate.RenderFilter{
Exclude: []string{},
},
}, raws...)
errs := new(packer.MultiError)
if p.config.OutputPath == "" {
p.config.OutputPath = "packer_{{.BuildName}}_{{.Provider}}"
}
if err = interpolate.Validate(p.config.OutputPath, p.config.ctx); err != nil {
errs = packer.MultiErrorAppend(
errs, fmt.Errorf("Error parsing target template: %s", err))
}
templates := map[string]*string{
"output": &p.config.OutputPath,
}
if p.config.Compression > flate.BestCompression {
p.config.Compression = flate.BestCompression
}
if p.config.Compression == -1 {
p.config.Compression = flate.DefaultCompression
}
if p.config.NumCPU < 1 {
p.config.NumCPU = runtime.NumCPU()
}
runtime.GOMAXPROCS(p.config.NumCPU)
for key, ptr := range templates {
if *ptr == "" {
errs = packer.MultiErrorAppend(
errs, fmt.Errorf("%s must be set", key))
}
*ptr, err = interpolate.Render(p.config.OutputPath, p.config.ctx)
if err != nil {
errs = packer.MultiErrorAppend(
errs, fmt.Errorf("Error processing %s: %s", key, err))
}
}
if len(errs.Errors) > 0 {
return errs
}
return nil
}
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func (p *PostProcessor) fillMetadata(metadata Metadata, files []string) Metadata {
// layout shows by example how the reference time should be represented.
const layout = "2006-01-02_15-04-05"
t := time.Now()
if !p.config.Metadata {
return metadata
}
for _, f := range files {
if fi, err := os.Stat(f); err != nil {
continue
} else {
if i, ok := metadata[filepath.Base(f)]; !ok {
metadata[filepath.Base(f)] = Metaitem{CompType: p.config.Format, OrigSize: fi.Size(), CompDate: t.Format(layout)}
} else {
i.CompSize = fi.Size()
i.CompDate = t.Format(layout)
metadata[filepath.Base(f)] = i
}
}
}
return metadata
}
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func (p *PostProcessor) PostProcess(ui packer.Ui, artifact packer.Artifact) (packer.Artifact, bool, error) {
newartifact := &Artifact{Path: p.config.OutputPath}
metafile := filepath.Join(p.config.OutputPath, "metadata")
ui.Say(fmt.Sprintf("[CBEDNARSKI] Creating archive at %s", newartifact.Path))
_, err := os.Stat(newartifact.Path)
if err == nil {
return nil, false, fmt.Errorf("output dir %s must not exists", newartifact.Path)
}
err = os.MkdirAll(newartifact.Path, 0755)
if err != nil {
return nil, false, fmt.Errorf("failed to create output: %s", err)
}
p.config.Format += "tar.gzip"
formats := strings.Split(p.config.Format, ".")
ui.Say(fmt.Sprintf("[CBEDNARSKI] Formats length %d", len(formats)))
if len(p.config.Format) == 0 {
ui.Say("[CBEDNARSKI] Formats is empty")
formats[0] = "tar.gzip"
}
files := artifact.Files()
metadata := make(Metadata, 0)
metadata = p.fillMetadata(metadata, files)
ui.Say(fmt.Sprintf("[CBEDNARSKI] Formats %#v", formats))
for _, compress := range formats {
switch compress {
case "tar":
files, err = p.cmpTAR(files, filepath.Join(p.config.OutputPath, p.config.OutputFile))
metadata = p.fillMetadata(metadata, files)
case "zip":
files, err = p.cmpZIP(files, filepath.Join(p.config.OutputPath, p.config.OutputFile))
metadata = p.fillMetadata(metadata, files)
case "pgzip":
files, err = p.cmpPGZIP(files, p.config.OutputPath)
metadata = p.fillMetadata(metadata, files)
case "gzip":
files, err = p.cmpGZIP(files, p.config.OutputPath)
metadata = p.fillMetadata(metadata, files)
case "bgzf":
files, err = p.cmpBGZF(files, p.config.OutputPath)
metadata = p.fillMetadata(metadata, files)
case "lz4":
files, err = p.cmpLZ4(files, p.config.OutputPath)
metadata = p.fillMetadata(metadata, files)
case "e2fs":
files, err = p.cmpE2FS(files, filepath.Join(p.config.OutputPath, p.config.OutputFile))
metadata = p.fillMetadata(metadata, files)
}
if err != nil {
return nil, false, fmt.Errorf("Failed to compress: %s", err)
}
}
if p.config.Metadata {
fp, err := os.Create(metafile)
if err != nil {
return nil, false, err
}
if buf, err := yaml.Marshal(metadata); err != nil {
fp.Close()
return nil, false, err
} else {
if _, err = fp.Write(buf); err != nil {
fp.Close()
return nil, false, err
}
fp.Close()
}
}
newartifact.files = append(newartifact.files, files...)
if p.config.Metadata {
newartifact.files = append(newartifact.files, metafile)
}
return newartifact, p.config.KeepInputArtifact, nil
}
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func (p *PostProcessor) cmpTAR(src []string, dst string) ([]string, error) {
fw, err := os.Create(dst)
if err != nil {
return nil, fmt.Errorf("tar error creating tar %s: %s", dst, err)
}
defer fw.Close()
tw := tar.NewWriter(fw)
defer tw.Close()
for _, name := range src {
fi, err := os.Stat(name)
if err != nil {
return nil, fmt.Errorf("tar error on stat of %s: %s", name, err)
}
target, _ := os.Readlink(path)
header, err := tar.FileInfoHeader(fi, target)
if err != nil {
return nil, fmt.Errorf("tar error reading info for %s: %s", name, err)
}
if err = tw.WriteHeader(header); err != nil {
return nil, fmt.Errorf("tar error writing header for %s: %s", name, err)
}
fr, err := os.Open(name)
if err != nil {
return nil, fmt.Errorf("tar error opening file %s: %s", name, err)
}
if _, err = io.Copy(tw, fr); err != nil {
fr.Close()
return nil, fmt.Errorf("tar error copying contents of %s: %s", name, err)
}
fr.Close()
}
return []string{dst}, nil
}
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func (p *PostProcessor) cmpGZIP(src []string, dst string) ([]string, error) {
var res []string
for _, name := range src {
filename := filepath.Join(dst, filepath.Base(name))
fw, err := os.Create(filename)
if err != nil {
return nil, fmt.Errorf("gzip error: %s", err)
}
cw, err := gzip.NewWriterLevel(fw, p.config.Compression)
if err != nil {
fw.Close()
return nil, fmt.Errorf("gzip error: %s", err)
}
fr, err := os.Open(name)
if err != nil {
cw.Close()
fw.Close()
return nil, fmt.Errorf("gzip error: %s", err)
}
if _, err = io.Copy(cw, fr); err != nil {
cw.Close()
fr.Close()
fw.Close()
return nil, fmt.Errorf("gzip error: %s", err)
}
cw.Close()
fr.Close()
fw.Close()
res = append(res, filename)
}
return res, nil
}
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func (p *PostProcessor) cmpPGZIP(src []string, dst string) ([]string, error) {
var res []string
for _, name := range src {
filename := filepath.Join(dst, filepath.Base(name))
fw, err := os.Create(filename)
if err != nil {
return nil, fmt.Errorf("pgzip error: %s", err)
}
cw, err := pgzip.NewWriterLevel(fw, p.config.Compression)
if err != nil {
fw.Close()
return nil, fmt.Errorf("pgzip error: %s", err)
}
fr, err := os.Open(name)
if err != nil {
cw.Close()
fw.Close()
return nil, fmt.Errorf("pgzip error: %s", err)
}
if _, err = io.Copy(cw, fr); err != nil {
cw.Close()
fr.Close()
fw.Close()
return nil, fmt.Errorf("pgzip error: %s", err)
}
cw.Close()
fr.Close()
fw.Close()
res = append(res, filename)
}
return res, nil
}
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func (p *PostProcessor) cmpLZ4(src []string, dst string) ([]string, error) {
var res []string
for _, name := range src {
filename := filepath.Join(dst, filepath.Base(name))
fw, err := os.Create(filename)
if err != nil {
return nil, fmt.Errorf("lz4 error: %s", err)
}
cw := lz4.NewWriter(fw)
if err != nil {
fw.Close()
return nil, fmt.Errorf("lz4 error: %s", err)
}
if p.config.Compression > flate.DefaultCompression {
cw.Header.HighCompression = true
}
fr, err := os.Open(name)
if err != nil {
cw.Close()
fw.Close()
return nil, fmt.Errorf("lz4 error: %s", err)
}
if _, err = io.Copy(cw, fr); err != nil {
cw.Close()
fr.Close()
fw.Close()
return nil, fmt.Errorf("lz4 error: %s", err)
}
cw.Close()
fr.Close()
fw.Close()
res = append(res, filename)
}
return res, nil
}
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func (p *PostProcessor) cmpBGZF(src []string, dst string) ([]string, error) {
var res []string
for _, name := range src {
filename := filepath.Join(dst, filepath.Base(name))
fw, err := os.Create(filename)
if err != nil {
return nil, fmt.Errorf("bgzf error: %s", err)
}
cw, err := bgzf.NewWriterLevel(fw, p.config.Compression, runtime.NumCPU())
if err != nil {
return nil, fmt.Errorf("bgzf error: %s", err)
}
fr, err := os.Open(name)
if err != nil {
cw.Close()
fw.Close()
return nil, fmt.Errorf("bgzf error: %s", err)
}
if _, err = io.Copy(cw, fr); err != nil {
cw.Close()
fr.Close()
fw.Close()
return nil, fmt.Errorf("bgzf error: %s", err)
}
cw.Close()
fr.Close()
fw.Close()
res = append(res, filename)
}
return res, nil
}
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func (p *PostProcessor) cmpE2FS(src []string, dst string) ([]string, error) {
panic("not implemented")
}
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func (p *PostProcessor) cmpZIP(src []string, dst string) ([]string, error) {
fw, err := os.Create(dst)
if err != nil {
return nil, fmt.Errorf("zip error: %s", err)
}
defer fw.Close()
zw := zip.NewWriter(fw)
defer zw.Close()
for _, name := range src {
header, err := zw.Create(name)
if err != nil {
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return nil, fmt.Errorf("zip error: %s", err)
}
fr, err := os.Open(name)
if err != nil {
return nil, fmt.Errorf("zip error: %s", err)
}
if _, err = io.Copy(header, fr); err != nil {
fr.Close()
return nil, fmt.Errorf("zip error: %s", err)
}
fr.Close()
}
return []string{dst}, nil
}