/
main.go
172 lines (136 loc) · 4.07 KB
/
main.go
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package main
import (
"bytes"
"encoding/json"
"fmt"
"io/ioutil"
"os"
"os/exec"
"path/filepath"
"time"
"github.com/cheggaaa/pb"
"github.com/dpb587/dynamic-metalink-resource/api"
"github.com/dpb587/metalink"
"github.com/dpb587/metalink-repository-resource/factory"
"github.com/dpb587/metalink/transfer"
)
func main() {
if len(os.Args) < 2 {
api.Fatal("in: bad invocation", fmt.Errorf("%s DESTINATION-DIR", os.Args[0]))
}
destination := os.Args[1]
err := os.MkdirAll(destination, 0755)
if err != nil {
api.Fatal("in: bad destination", err)
}
var request Request
err = json.NewDecoder(os.Stdin).Decode(&request)
if err != nil {
api.Fatal("in: bad stdin: parse error", err)
}
meta4Bytes, err := api.ExecuteScript(request.Source.MetalinkGet, map[string]string{
"version": request.Version.Version,
})
if err != nil {
api.Fatal("check: metalink script", err)
}
var meta4 metalink.Metalink
err = metalink.Unmarshal(meta4Bytes, &meta4)
if err != nil {
api.Fatal("check: metalink result", err)
}
var signatureTrustStore string
if request.Source.SignatureTrustStore != "" {
tmpfile, err := ioutil.TempFile("", "signature-trust-store")
if err != nil {
api.Fatal("check: signature trust store: temp file", err)
}
cmd := exec.Command("gpg", "--no-default-keyring", "--keyring", tmpfile.Name(), "--import", "-")
cmd.Stdin = bytes.NewBufferString(request.Source.SignatureTrustStore)
err = cmd.Run()
if err != nil {
api.Fatal("check: signature trust store: importing", err)
}
defer os.RemoveAll(tmpfile.Name())
signatureTrustStore = tmpfile.Name()
}
var fileCount int
var byteCount uint64
for _, file := range meta4.Files {
var matched = true
if len(request.Source.IncludeFiles) > 0 {
matched = false
for _, pattern := range request.Source.IncludeFiles {
if match, _ := filepath.Match(pattern, file.Name); match {
matched = true
break
}
}
}
if len(request.Source.ExcludeFiles) > 0 {
for _, pattern := range request.Source.ExcludeFiles {
if match, _ := filepath.Match(pattern, file.Name); match {
matched = false
break
}
}
}
if !matched {
continue
}
if !request.Params.SkipDownload {
if fileCount > 0 {
fmt.Fprintln(os.Stderr, "")
}
fmt.Fprintln(os.Stderr, file.Name)
local, err := factory.GetOrigin(metalink.URL{URL: filepath.Join(destination, file.Name)})
if err != nil {
api.Fatal(fmt.Sprintf("in: bad file: %s", file.Name), err)
}
progress := pb.New64(int64(file.Size)).Set(pb.Bytes, true).SetRefreshRate(time.Second).SetWidth(80)
progress.SetWriter(os.Stderr)
verifier, err := factory.DynamicVerification.GetVerifier(file, request.Source.SkipHashVerification, request.Source.SkipSignatureVerification, signatureTrustStore)
if err != nil {
api.Fatal(fmt.Sprintf("in: bad file verifier: %s", file.Name), err)
}
err = transfer.NewVerifiedTransfer(factory.GetMetaURLLoaderFactory(), factory.GetURLLoaderFactory(), verifier).TransferFile(file, local, progress)
if err != nil {
api.Fatal(fmt.Sprintf("in: bad file transfer: %s", file.Name), err)
}
}
byteCount = byteCount + file.Size
fileCount = fileCount + 1
}
err = os.MkdirAll(filepath.Join(destination, ".resource"), 0700)
if err != nil {
api.Fatal("in: fs metadata: mkdir", err)
}
meta4bytes, err := metalink.MarshalXML(meta4)
if err != nil {
api.Fatal("in: fs metadata: marshal metalink", err)
}
err = ioutil.WriteFile(filepath.Join(destination, ".resource", "metalink.meta4"), meta4bytes, 0644)
if err != nil {
api.Fatal("in: fs metadata: metalink.meta4", err)
}
err = ioutil.WriteFile(filepath.Join(destination, ".resource", "version"), []byte(request.Version.Version), 0644)
if err != nil {
api.Fatal("in: fs metadata: version", err)
}
err = json.NewEncoder(os.Stdout).Encode(Response{
Version: request.Version,
Metadata: []api.Metadata{
{
Name: "files",
Value: fmt.Sprintf("%d", fileCount),
},
{
Name: "bytes",
Value: fmt.Sprintf("%d", byteCount),
},
},
})
if err != nil {
api.Fatal("in: bad stdout: json", err)
}
}