Add downloader builtin plugin

builtin/filedownloader/downloader/downloader.go

@@ -0,0 +1,45 @@
+package downloader
+
+import (
+	"net/http"
+	"time"
+
+	"github.com/hashicorp/go-getter"
+	"github.com/hashicorp/vagrant-plugin-sdk/component"
+)
+
+type Downloader struct {
+	config DownloaderConfig
+}
+
+type DownloaderConfig struct {
+	src     string
+	dest    string
+	headers http.Header
+}
+
+func (d *Downloader) DownloadFunc() interface{} {
+	return d.Download
+}
+
+func (d *Downloader) Download() (err error) {
+	err = getter.Get(d.config.dest, d.config.src, getter.WithGetters(
+		map[string]getter.Getter{
+			"http": &getter.HttpGetter{
+				Netrc:            false,
+				HeadFirstTimeout: 10 * time.Second,
+				Header:           d.config.headers,
+				ReadTimeout:      30 * time.Second,
+				MaxBytes:         500000000, // 500 MB
+			},
+			"file": &getter.FileGetter{
+				Copy: true,
+			},
+		},
+	))
+	return
+}
+
+var (
+	_ component.Downloader = (*Downloader)(nil)
+)

builtin/filedownloader/main.go

@@ -0,0 +1,15 @@
+package filedownloader
+
+import (
+	sdk "github.com/hashicorp/vagrant-plugin-sdk"
+	"github.com/hashicorp/vagrant/builtin/filedownloader/downloader"
+)
+
+//go:generate protoc -I ../../.. --go_opt=plugins=grpc --go_out=../../.. vagrant-ruby/builtin/filedownloader/proto/plugin.proto
+
+var CommandOptions = []sdk.Option{
+	sdk.WithComponents(
+		&downloader.Downloader{},
+	),
+	sdk.WithName("filedownloader"),
+}