418 lines
9.9 KiB
Go
418 lines
9.9 KiB
Go
package compress
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import (
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tar "archive/tar"
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zip "archive/zip"
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"compress/flate"
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gzip "compress/gzip"
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"fmt"
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"io"
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"os"
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"path/filepath"
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"runtime"
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"strings"
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"time"
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bgzf "github.com/biogo/hts/bgzf"
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pgzip "github.com/klauspost/pgzip"
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"github.com/mitchellh/packer/common"
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"github.com/mitchellh/packer/helper/config"
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"github.com/mitchellh/packer/packer"
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"github.com/mitchellh/packer/template/interpolate"
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lz4 "github.com/pierrec/lz4"
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"gopkg.in/yaml.v2"
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)
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type Metadata map[string]Metaitem
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type Metaitem struct {
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CompSize int64 `yaml:"compsize"`
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OrigSize int64 `yaml:"origsize"`
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CompType string `yaml:"comptype"`
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CompDate string `yaml:"compdate"`
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}
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type Config struct {
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common.PackerConfig `mapstructure:",squash"`
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OutputPath string `mapstructure:"output"`
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OutputFile string `mapstructure:"file"`
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Compression int `mapstructure:"compression"`
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Metadata bool `mapstructure:"metadata"`
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NumCPU int `mapstructure:"numcpu"`
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Format string `mapstructure:"format"`
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KeepInputArtifact bool `mapstructure:"keep_input_artifact"`
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ctx *interpolate.Context
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}
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type PostProcessor struct {
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cfg Config
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}
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func (p *PostProcessor) Configure(raws ...interface{}) error {
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p.cfg.Compression = -1
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err := config.Decode(&p.cfg, &config.DecodeOpts{
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Interpolate: true,
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InterpolateFilter: &interpolate.RenderFilter{
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Exclude: []string{
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// TODO figure out if something needs to go here.
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},
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},
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}, raws...)
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errs := new(packer.MultiError)
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if p.cfg.OutputPath == "" {
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p.cfg.OutputPath = "packer_{{.BuildName}}_{{.Provider}}"
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}
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if err = interpolate.Validate(p.cfg.OutputPath, p.cfg.ctx); err != nil {
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errs = packer.MultiErrorAppend(
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errs, fmt.Errorf("Error parsing target template: %s", err))
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}
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templates := map[string]*string{
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"output": &p.cfg.OutputPath,
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}
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if p.cfg.Compression > flate.BestCompression {
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p.cfg.Compression = flate.BestCompression
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}
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if p.cfg.Compression == -1 {
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p.cfg.Compression = flate.DefaultCompression
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}
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if p.cfg.NumCPU < 1 {
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p.cfg.NumCPU = runtime.NumCPU()
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}
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runtime.GOMAXPROCS(p.cfg.NumCPU)
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for key, ptr := range templates {
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if *ptr == "" {
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errs = packer.MultiErrorAppend(
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errs, fmt.Errorf("%s must be set", key))
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}
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*ptr, err = interpolate.Render(p.cfg.OutputPath, p.cfg.ctx)
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if err != nil {
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errs = packer.MultiErrorAppend(
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errs, fmt.Errorf("Error processing %s: %s", key, err))
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}
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}
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if len(errs.Errors) > 0 {
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return errs
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}
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return nil
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}
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func (p *PostProcessor) fillMetadata(metadata Metadata, files []string) Metadata {
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// layout shows by example how the reference time should be represented.
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const layout = "2006-01-02_15-04-05"
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t := time.Now()
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if !p.cfg.Metadata {
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return metadata
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}
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for _, f := range files {
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if fi, err := os.Stat(f); err != nil {
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continue
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} else {
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if i, ok := metadata[filepath.Base(f)]; !ok {
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metadata[filepath.Base(f)] = Metaitem{CompType: p.cfg.Format, OrigSize: fi.Size(), CompDate: t.Format(layout)}
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} else {
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i.CompSize = fi.Size()
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i.CompDate = t.Format(layout)
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metadata[filepath.Base(f)] = i
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}
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}
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}
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return metadata
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}
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func (p *PostProcessor) PostProcess(ui packer.Ui, artifact packer.Artifact) (packer.Artifact, bool, error) {
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newartifact := &Artifact{builderId: artifact.BuilderId(), dir: p.cfg.OutputPath}
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metafile := filepath.Join(p.cfg.OutputPath, "metadata")
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_, err := os.Stat(newartifact.dir)
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if err == nil {
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return nil, false, fmt.Errorf("output dir must not exists: %s", err)
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}
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err = os.MkdirAll(newartifact.dir, 0755)
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if err != nil {
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return nil, false, fmt.Errorf("failed to create output: %s", err)
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}
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formats := strings.Split(p.cfg.Format, ".")
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files := artifact.Files()
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metadata := make(Metadata, 0)
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metadata = p.fillMetadata(metadata, files)
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for _, compress := range formats {
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switch compress {
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case "tar":
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files, err = p.cmpTAR(files, filepath.Join(p.cfg.OutputPath, p.cfg.OutputFile))
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metadata = p.fillMetadata(metadata, files)
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case "zip":
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files, err = p.cmpZIP(files, filepath.Join(p.cfg.OutputPath, p.cfg.OutputFile))
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metadata = p.fillMetadata(metadata, files)
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case "pgzip":
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files, err = p.cmpPGZIP(files, p.cfg.OutputPath)
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metadata = p.fillMetadata(metadata, files)
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case "gzip":
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files, err = p.cmpGZIP(files, p.cfg.OutputPath)
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metadata = p.fillMetadata(metadata, files)
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case "bgzf":
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files, err = p.cmpBGZF(files, p.cfg.OutputPath)
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metadata = p.fillMetadata(metadata, files)
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case "lz4":
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files, err = p.cmpLZ4(files, p.cfg.OutputPath)
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metadata = p.fillMetadata(metadata, files)
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case "e2fs":
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files, err = p.cmpE2FS(files, filepath.Join(p.cfg.OutputPath, p.cfg.OutputFile))
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metadata = p.fillMetadata(metadata, files)
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}
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if err != nil {
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return nil, false, fmt.Errorf("Failed to compress: %s", err)
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}
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}
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if p.cfg.Metadata {
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fp, err := os.Create(metafile)
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if err != nil {
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return nil, false, err
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}
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if buf, err := yaml.Marshal(metadata); err != nil {
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fp.Close()
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return nil, false, err
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} else {
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if _, err = fp.Write(buf); err != nil {
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fp.Close()
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return nil, false, err
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}
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fp.Close()
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}
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}
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newartifact.f = append(newartifact.f, files...)
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if p.cfg.Metadata {
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newartifact.f = append(newartifact.f, metafile)
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}
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return newartifact, p.cfg.KeepInputArtifact, nil
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}
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func (p *PostProcessor) cmpTAR(src []string, dst string) ([]string, error) {
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fw, err := os.Create(dst)
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if err != nil {
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return nil, fmt.Errorf("tar error: %s", err)
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}
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defer fw.Close()
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tw := tar.NewWriter(fw)
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defer tw.Close()
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for _, name := range src {
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fi, err := os.Stat(name)
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if err != nil {
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return nil, fmt.Errorf("tar error: %s", err)
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}
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target, _ := os.Readlink(name)
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header, err := tar.FileInfoHeader(fi, target)
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if err != nil {
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return nil, fmt.Errorf("tar error: %s", err)
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}
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if err = tw.WriteHeader(header); err != nil {
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return nil, fmt.Errorf("tar error: %s", err)
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}
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fr, err := os.Open(name)
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if err != nil {
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return nil, fmt.Errorf("tar error: %s", err)
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}
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if _, err = io.Copy(tw, fr); err != nil {
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fr.Close()
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return nil, fmt.Errorf("tar error: %s", err)
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}
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fr.Close()
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}
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return []string{dst}, nil
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}
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func (p *PostProcessor) cmpGZIP(src []string, dst string) ([]string, error) {
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var res []string
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for _, name := range src {
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filename := filepath.Join(dst, filepath.Base(name))
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fw, err := os.Create(filename)
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if err != nil {
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return nil, fmt.Errorf("gzip error: %s", err)
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}
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cw, err := gzip.NewWriterLevel(fw, p.cfg.Compression)
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if err != nil {
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fw.Close()
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return nil, fmt.Errorf("gzip error: %s", err)
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}
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fr, err := os.Open(name)
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if err != nil {
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cw.Close()
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fw.Close()
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return nil, fmt.Errorf("gzip error: %s", err)
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}
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if _, err = io.Copy(cw, fr); err != nil {
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cw.Close()
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fr.Close()
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fw.Close()
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return nil, fmt.Errorf("gzip error: %s", err)
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}
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cw.Close()
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fr.Close()
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fw.Close()
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res = append(res, filename)
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}
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return res, nil
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}
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func (p *PostProcessor) cmpPGZIP(src []string, dst string) ([]string, error) {
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var res []string
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for _, name := range src {
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filename := filepath.Join(dst, filepath.Base(name))
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fw, err := os.Create(filename)
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if err != nil {
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return nil, fmt.Errorf("pgzip error: %s", err)
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}
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cw, err := pgzip.NewWriterLevel(fw, p.cfg.Compression)
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if err != nil {
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fw.Close()
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return nil, fmt.Errorf("pgzip error: %s", err)
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}
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fr, err := os.Open(name)
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if err != nil {
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cw.Close()
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fw.Close()
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return nil, fmt.Errorf("pgzip error: %s", err)
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}
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if _, err = io.Copy(cw, fr); err != nil {
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cw.Close()
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fr.Close()
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fw.Close()
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return nil, fmt.Errorf("pgzip error: %s", err)
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}
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cw.Close()
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fr.Close()
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fw.Close()
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res = append(res, filename)
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}
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return res, nil
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}
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func (p *PostProcessor) cmpLZ4(src []string, dst string) ([]string, error) {
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var res []string
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for _, name := range src {
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filename := filepath.Join(dst, filepath.Base(name))
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fw, err := os.Create(filename)
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if err != nil {
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return nil, fmt.Errorf("lz4 error: %s", err)
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}
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cw := lz4.NewWriter(fw)
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if err != nil {
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fw.Close()
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return nil, fmt.Errorf("lz4 error: %s", err)
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}
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if p.cfg.Compression > flate.DefaultCompression {
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cw.Header.HighCompression = true
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}
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fr, err := os.Open(name)
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if err != nil {
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cw.Close()
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fw.Close()
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return nil, fmt.Errorf("lz4 error: %s", err)
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}
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if _, err = io.Copy(cw, fr); err != nil {
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cw.Close()
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fr.Close()
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fw.Close()
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return nil, fmt.Errorf("lz4 error: %s", err)
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}
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cw.Close()
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fr.Close()
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fw.Close()
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res = append(res, filename)
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}
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return res, nil
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}
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func (p *PostProcessor) cmpBGZF(src []string, dst string) ([]string, error) {
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var res []string
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for _, name := range src {
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filename := filepath.Join(dst, filepath.Base(name))
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fw, err := os.Create(filename)
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if err != nil {
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return nil, fmt.Errorf("bgzf error: %s", err)
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}
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cw, err := bgzf.NewWriterLevel(fw, p.cfg.Compression, runtime.NumCPU())
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if err != nil {
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return nil, fmt.Errorf("bgzf error: %s", err)
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}
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fr, err := os.Open(name)
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if err != nil {
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cw.Close()
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fw.Close()
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return nil, fmt.Errorf("bgzf error: %s", err)
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}
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if _, err = io.Copy(cw, fr); err != nil {
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cw.Close()
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fr.Close()
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fw.Close()
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return nil, fmt.Errorf("bgzf error: %s", err)
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}
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cw.Close()
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fr.Close()
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fw.Close()
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res = append(res, filename)
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}
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return res, nil
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}
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func (p *PostProcessor) cmpE2FS(src []string, dst string) ([]string, error) {
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panic("not implemented")
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}
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func (p *PostProcessor) cmpZIP(src []string, dst string) ([]string, error) {
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fw, err := os.Create(dst)
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if err != nil {
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return nil, fmt.Errorf("zip error: %s", err)
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}
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defer fw.Close()
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zw := zip.NewWriter(fw)
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defer zw.Close()
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for _, name := range src {
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header, err := zw.Create(name)
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if err != nil {
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return nil, fmt.Errorf("zip error: %s", err)
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}
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fr, err := os.Open(name)
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if err != nil {
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return nil, fmt.Errorf("zip error: %s", err)
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}
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if _, err = io.Copy(header, fr); err != nil {
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fr.Close()
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return nil, fmt.Errorf("zip error: %s", err)
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}
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fr.Close()
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}
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return []string{dst}, nil
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}
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