blob: 5af2594ad4137670e205d1fb389a008d77b12164 [file] [log] [blame]
// Copyright 2015 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// The upload command writes a file to Google Cloud Storage. It's used
// exclusively by the Makefiles in the Go project repos. Think of it
// as a very light version of gsutil or gcloud, but with some
// Go-specific configuration knowledge baked in.
package main
import (
"bytes"
"compress/gzip"
"context"
"crypto/md5"
"flag"
"fmt"
"io"
"log"
"net/http"
"os"
"strings"
"cloud.google.com/go/storage"
)
var (
public = flag.Bool("public", false, "object should be world-readable")
cacheable = flag.Bool("cacheable", true, "object should be cacheable")
file = flag.String("file", "", "read object from `file` ('-' for stdin)")
verbose = flag.Bool("verbose", false, "verbose logging")
project = flag.String("project", "", "GCE Project. If blank, it's automatically inferred from the bucket name for the common Go buckets.")
doGzip = flag.Bool("gzip", false, "gzip the stored contents (not the upload's Content-Encoding); this forces the Content-Type to be application/octet-stream. To prevent misuse, the object name must also end in '.gz'")
extraEnv = flag.String("env", "", "comma-separated list of addition KEY=val environment pairs to include in build environment when building a target to upload")
)
func main() {
flag.Usage = func() {
fmt.Fprintf(os.Stderr, "Usage: upload [flags] bucket/object\n")
flag.PrintDefaults()
}
flag.Parse()
if flag.NArg() != 1 {
flag.Usage()
os.Exit(1)
}
args := strings.SplitN(flag.Arg(0), "/", 2)
if len(args) != 2 {
flag.Usage()
os.Exit(1)
}
if strings.HasPrefix(*file, "go:") {
log.Fatalf("-file=go:target syntax is no longer supported")
}
bucket, object := args[0], args[1]
if *doGzip && !strings.HasSuffix(object, ".gz") {
log.Fatalf("-gzip flag requires object ending in .gz")
}
proj := *project
if proj == "" {
proj, _ = bucketProject[bucket]
if proj == "" {
log.Fatalf("bucket %q doesn't have an associated project in upload.go", bucket)
}
}
ctx := context.Background()
storageClient, err := storage.NewClient(ctx)
if err != nil {
log.Fatalf("storage.NewClient: %v", err)
}
if alreadyUploaded(storageClient, bucket, object) {
if *verbose {
log.Printf("gs://%s/%s up-to-date", bucket, object)
}
return
}
w := storageClient.Bucket(bucket).Object(object).NewWriter(ctx)
// If you don't give the owners access, the web UI seems to
// have a bug and doesn't have access to see that it's public, so
// won't render the "Shared Publicly" link. So we do that, even
// though it's dumb and unnecessary otherwise:
w.ACL = append(w.ACL, storage.ACLRule{Entity: storage.ACLEntity("project-owners-" + proj), Role: storage.RoleOwner})
if *public {
w.ACL = append(w.ACL, storage.ACLRule{Entity: storage.AllUsers, Role: storage.RoleReader})
if !*cacheable {
w.CacheControl = "no-cache"
}
}
var content io.Reader
switch {
case *file == "-":
content = os.Stdin
default:
content, err = os.Open(*file)
if err != nil {
log.Fatal(err)
}
}
if *doGzip {
var zbuf bytes.Buffer
zw := gzip.NewWriter(&zbuf)
if _, err := io.Copy(zw, content); err != nil {
log.Fatalf("compressing content: %v", err)
}
if err := zw.Close(); err != nil {
log.Fatalf("gzip.Close: %v", err)
}
content = &zbuf
}
const maxSlurp = 1 << 20
var buf bytes.Buffer
n, err := io.CopyN(&buf, content, maxSlurp)
if err != nil && err != io.EOF {
log.Fatalf("Error reading file: %v, %v", n, err)
}
if *doGzip {
w.ContentType = "application/octet-stream"
} else {
w.ContentType = http.DetectContentType(buf.Bytes())
}
_, err = io.Copy(w, io.MultiReader(&buf, content))
if cerr := w.Close(); cerr != nil && err == nil {
err = cerr
}
if err != nil {
log.Fatalf("Write error: %v", err)
}
if *verbose {
log.Printf("gs://%s/%s uploaded", bucket, object)
}
}
var bucketProject = map[string]string{
"dev-gccgo-builder-data": "gccgo-dashboard-dev",
"dev-go-builder-data": "go-dashboard-dev",
"gccgo-builder-data": "gccgo-dashboard-builders",
"go-builder-data": "symbolic-datum-552",
"go-build-log": "symbolic-datum-552",
"http2-demo-server-tls": "symbolic-datum-552",
"gobuilder": "999119582588", // deprecated
"golang": "999119582588",
}
// alreadyUploaded reports whether *file has already been uploaded and the correct contents
// are on cloud storage already.
func alreadyUploaded(storageClient *storage.Client, bucket, object string) bool {
if *file == "-" {
return false // don't know.
}
o, err := storageClient.Bucket(bucket).Object(object).Attrs(context.Background())
if err == storage.ErrObjectNotExist {
return false
}
if err != nil {
log.Printf("Warning: stat failure: %v", err)
return false
}
m5 := md5.New()
fi, err := os.Stat(*file)
if err != nil {
log.Fatal(err)
}
if fi.Size() != o.Size {
return false
}
f, err := os.Open(*file)
if err != nil {
log.Fatal(err)
}
defer f.Close()
n, err := io.Copy(m5, f)
if err != nil {
log.Fatal(err)
}
if n != fi.Size() {
log.Printf("Warning: file size of %v changed", *file)
}
return bytes.Equal(m5.Sum(nil), o.MD5)
}