734e00af9e
* build: bump PPAs to Go 1.13 (via longsleep), keep Trusty on 1.11 * travis, build, vendor: use own Go bundle for PPA builds * travis, build, internal, vendor: smarter Go bundler, own untar * build: updated ci-notes with new Go bundling, only make, don't test
82 lines
2.8 KiB
Go
82 lines
2.8 KiB
Go
// Copyright 2019 The go-ethereum Authors
|
|
// This file is part of the go-ethereum library.
|
|
//
|
|
// The go-ethereum library is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU Lesser General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// The go-ethereum library is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU Lesser General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU Lesser General Public License
|
|
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
package build
|
|
|
|
import (
|
|
"bytes"
|
|
"crypto/sha256"
|
|
"fmt"
|
|
"io/ioutil"
|
|
"net/http"
|
|
"os"
|
|
"path/filepath"
|
|
"strings"
|
|
)
|
|
|
|
// EnsureGoSources ensures that path contains a file with the given SHA256 hash,
|
|
// and if not, it downloads a fresh Go source package from upstream and replaces
|
|
// path with it (if the hash matches).
|
|
func EnsureGoSources(version string, hash []byte, path string) error {
|
|
// Sanity check the destination path to ensure we don't do weird things
|
|
if !strings.HasSuffix(path, ".tar.gz") {
|
|
return fmt.Errorf("destination path (%s) must end with .tar.gz", path)
|
|
}
|
|
// If the file exists, validate it's hash
|
|
if archive, err := ioutil.ReadFile(path); err == nil { // Go sources are ~20MB, it's fine to read all
|
|
hasher := sha256.New()
|
|
hasher.Write(archive)
|
|
have := hasher.Sum(nil)
|
|
|
|
if bytes.Equal(have, hash) {
|
|
fmt.Printf("Go %s [%x] available at %s\n", version, hash, path)
|
|
return nil
|
|
}
|
|
fmt.Printf("Go %s hash mismatch (have %x, want %x) at %s, deleting old archive\n", version, have, hash, path)
|
|
if err := os.Remove(path); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
// Archive missing or bad hash, download a new one
|
|
fmt.Printf("Downloading Go %s [want %x] into %s\n", version, hash, path)
|
|
|
|
res, err := http.Get(fmt.Sprintf("https://dl.google.com/go/go%s.src.tar.gz", version))
|
|
if err != nil || res.StatusCode != http.StatusOK {
|
|
return fmt.Errorf("failed to access Go sources: code %d, err %v", res.StatusCode, err)
|
|
}
|
|
defer res.Body.Close()
|
|
|
|
archive, err := ioutil.ReadAll(res.Body)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
// Sanity check the downloaded archive, save if checks out
|
|
hasher := sha256.New()
|
|
hasher.Write(archive)
|
|
|
|
if have := hasher.Sum(nil); !bytes.Equal(have, hash) {
|
|
return fmt.Errorf("downloaded Go %s hash mismatch (have %x, want %x)", version, have, hash)
|
|
}
|
|
if err := os.MkdirAll(filepath.Dir(path), 0755); err != nil {
|
|
return err
|
|
}
|
|
if err := ioutil.WriteFile(path, archive, 0644); err != nil {
|
|
return err
|
|
}
|
|
fmt.Printf("Downloaded Go %s [%x] into %s\n", version, hash, path)
|
|
return nil
|
|
}
|