feature: add chroot builder structure

builder/osc/chroot/builder.go

@@ -0,0 +1,53 @@
+// The chroot package is able to create an Outscale OMI without requiring
+// the launch of a new instance for every build. It does this by attaching
+// and mounting the root volume of another OMI and chrooting into that
+// directory. It then creates an OMI from that attached drive.
+package chroot
+
+import (
+	"errors"
+	"runtime"
+
+	osccommon "github.com/hashicorp/packer/builder/osc/common"
+	"github.com/hashicorp/packer/common"
+	"github.com/hashicorp/packer/helper/multistep"
+	"github.com/hashicorp/packer/packer"
+	"github.com/hashicorp/packer/template/interpolate"
+)
+
+// The unique ID for this builder
+const BuilderId = "oapi.outscale.chroot"
+
+// Config is the configuration that is chained through the steps and
+// settable from the template.
+type Config struct {
+	common.PackerConfig       `mapstructure:",squash"`
+	osccommon.OMIBlockDevices `mapstructure:",squash"`
+	osccommon.OMIConfig       `mapstructure:",squash"`
+	osccommon.AccessConfig    `mapstructure:",squash"`
+
+	ctx interpolate.Context
+}
+
+type wrappedCommandTemplate struct {
+	Command string
+}
+
+type Builder struct {
+	config Config
+	runner multistep.Runner
+}
+
+func (b *Builder) Prepare(raws ...interface{}) ([]string, error) {
+	return nil, nil
+}
+
+func (b *Builder) Run(ui packer.Ui, hook packer.Hook, cache packer.Cache) (packer.Artifact, error) {
+	if runtime.GOOS != "linux" {
+		return nil, errors.New("The outscale-chroot builder only works on Linux environments.")
+	}
+	return nil, nil
+}
+
+func (b *Builder) Cancel() {
+}

command/plugin.go

@@ -40,6 +40,7 @@ import (
 	oracleocibuilder "github.com/hashicorp/packer/builder/oracle/oci"
 	oscbsubuilder "github.com/hashicorp/packer/builder/osc/bsu"
 	oscbsusurrogatebuilder "github.com/hashicorp/packer/builder/osc/bsusurrogate"
+	oscchrootbuilder "github.com/hashicorp/packer/builder/osc/chroot"
 	parallelsisobuilder "github.com/hashicorp/packer/builder/parallels/iso"
 	parallelspvmbuilder "github.com/hashicorp/packer/builder/parallels/pvm"
 	profitbricksbuilder "github.com/hashicorp/packer/builder/profitbricks"
@@ -125,6 +126,7 @@ var Builders = map[string]packer.Builder{
 	"oracle-oci":          new(oracleocibuilder.Builder),
 	"osc-bsu":             new(oscbsubuilder.Builder),
 	"osc-bsusurrogate":    new(oscbsusurrogatebuilder.Builder),
+	"osc-chroot":          new(oscchrootbuilder.Builder),
 	"parallels-iso":       new(parallelsisobuilder.Builder),
 	"parallels-pvm":       new(parallelspvmbuilder.Builder),
 	"profitbricks":        new(profitbricksbuilder.Builder),