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runtime_pack.go
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runtime_pack.go
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// SPDX-License-Identifier: BSD-3-Clause
// Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors.
// Licensed under the BSD-3-Clause License (the "License").
// You may not use this file except in compliance with the License.
package runtime
import (
"context"
"fmt"
"time"
"kraftkit.sh/initrd"
"kraftkit.sh/internal/tableprinter"
"kraftkit.sh/oci"
"kraftkit.sh/pack"
"kraftkit.sh/packmanager"
"kraftkit.sh/unikraft"
"kraftkit.sh/unikraft/arch"
"kraftkit.sh/unikraft/plat"
"kraftkit.sh/unikraft/target"
)
var _ pack.Package = (*Runtime)(nil)
const (
PrebuiltRegistry = "unikraft.org"
DefaultPrebuilt = "unikraft.org/base:latest"
)
// NewELFLoaderRuntime prepares a "ELF loader" application that has been
// pre-built and is accessible from a remote registry.
func NewELFLoaderRuntime(ctx context.Context, pbopts ...RuntimeOption) (*Runtime, error) {
elfloader := Runtime{}
for _, opt := range pbopts {
if err := opt(&elfloader); err != nil {
return nil, err
}
}
if defaultRuntime != "" {
// Return early if the user provided a custom elfloader unikernel
// application.
if ok, _ := unikraft.IsFileUnikraftUnikernel(defaultRuntime); ok {
elfloader.kernel = defaultRuntime
return &elfloader, nil
}
elfloader.source = defaultRuntime
} else if len(elfloader.kernel) > 0 {
return &elfloader, nil
} else if len(elfloader.name) == 0 {
elfloader.name = DefaultPrebuilt
}
var err error
elfloader.registry = packmanager.G(ctx)
if elfloader.registry == nil {
elfloader.registry, err = oci.NewOCIManager(ctx,
oci.WithDetectHandler(),
)
} else {
elfloader.registry, err = elfloader.registry.From(oci.OCIFormat)
}
if err != nil {
return nil, err
}
if err := elfloader.registry.SetSources(ctx, PrebuiltRegistry); err != nil {
return nil, err
}
// First try locally
results, err := elfloader.registry.Catalog(ctx,
packmanager.WithName(elfloader.name),
packmanager.WithTypes(unikraft.ComponentTypeApp),
)
if err != nil {
return nil, err
}
if len(results) == 0 {
results, err = elfloader.registry.Catalog(ctx,
packmanager.WithName(elfloader.name),
packmanager.WithTypes(unikraft.ComponentTypeApp),
packmanager.WithRemote(true),
)
if err != nil {
return nil, err
}
}
if len(results) == 0 {
return nil, fmt.Errorf("could not find elfloader")
} else if len(results) > 1 {
options := make([]string, len(results))
for i, result := range results {
options[i] = result.Name()
}
return nil, fmt.Errorf("too many options: %v", options)
}
elfloader.pack = results[0]
elfloader.name = results[0].Name()
elfloader.version = results[0].Version()
elfloader.source = results[0].Name()
return &elfloader, nil
}
// Columns implements kraftkit.sh/pack.Package
func (elfloader *Runtime) Columns() []tableprinter.Column {
return elfloader.pack.Columns()
}
// Metadata implements kraftkit.sh/pack.Package
func (elfloader *Runtime) Metadata() interface{} {
return elfloader.pack.Metadata()
}
// Push implements kraftkit.sh/pack.Package
func (elfloader *Runtime) Push(ctx context.Context, opts ...pack.PushOption) error {
panic("not implemented: kraftkit.sh/unikraft/elfloader.Runtime.Push")
}
// Unpack implements kraftkit.sh/pack.Package
func (elfloader *Runtime) Unpack(ctx context.Context, dir string) error {
return elfloader.pack.Unpack(ctx, dir)
}
// Pull implements kraftkit.sh/pack.Package
func (elfloader *Runtime) Pull(ctx context.Context, opts ...pack.PullOption) error {
return elfloader.pack.Pull(ctx, opts...)
}
// Pull implements kraftkit.sh/pack.Package
func (elfloader *Runtime) PulledAt(ctx context.Context) (bool, time.Time, error) {
return elfloader.pack.PulledAt(ctx)
}
func (elfloader *Runtime) Delete(ctx context.Context) error {
return elfloader.pack.Delete(ctx)
}
// Save implements kraftkit.sh/pack.Package
func (elfloader *Runtime) Save(ctx context.Context) error {
return elfloader.pack.Save(ctx)
}
// Format implements kraftkit.sh/unikraft.component.Component
func (elfloader *Runtime) Format() pack.PackageFormat {
return elfloader.pack.Format()
}
// Architecture implements kraftkit.sh/unikraft.target.Target
func (elfloader *Runtime) Architecture() arch.Architecture {
return elfloader.pack.(target.Target).Architecture()
}
// Platform implements kraftkit.sh/unikraft.target.Target
func (elfloader *Runtime) Platform() plat.Platform {
return elfloader.pack.(target.Target).Platform()
}
// Kernel implements kraftkit.sh/unikraft.target.Target
func (elfloader *Runtime) Kernel() string {
if len(elfloader.kernel) > 0 {
return elfloader.kernel
}
if t, ok := elfloader.pack.(target.Target); ok {
return t.Kernel()
}
return ""
}
// KernelDbg implements kraftkit.sh/unikraft.target.Target
func (elfloader *Runtime) KernelDbg() string {
return elfloader.pack.(target.Target).KernelDbg()
}
// Initrd implements kraftkit.sh/unikraft.target.Target
func (elfloader *Runtime) Initrd() initrd.Initrd {
return elfloader.pack.(target.Target).Initrd()
}
// Command implements kraftkit.sh/unikraft.target.Target
func (elfloader *Runtime) Command() []string {
return elfloader.pack.(target.Target).Command()
}
// ConfigFilename implements kraftkit.sh/unikraft.target.Target
func (elfloader *Runtime) ConfigFilename() string {
return elfloader.pack.(target.Target).ConfigFilename()
}