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binary.go
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binary.go
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// Copyright 2022 Namespace Labs Inc; All rights reserved.
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
package binary
import (
"context"
"fmt"
"io/fs"
"path/filepath"
"strings"
specs "github.com/opencontainers/image-spec/specs-go/v1"
"namespacelabs.dev/foundation/internal/artifacts/oci"
"namespacelabs.dev/foundation/internal/artifacts/registry"
"namespacelabs.dev/foundation/internal/build"
"namespacelabs.dev/foundation/internal/build/assets"
"namespacelabs.dev/foundation/internal/build/multiplatform"
"namespacelabs.dev/foundation/internal/compute"
"namespacelabs.dev/foundation/internal/console"
"namespacelabs.dev/foundation/internal/fnerrors"
"namespacelabs.dev/foundation/internal/integrations/dockerfile"
"namespacelabs.dev/foundation/schema"
"namespacelabs.dev/foundation/schema/storage"
"namespacelabs.dev/foundation/std/cfg"
"namespacelabs.dev/foundation/std/pkggraph"
)
var (
UsePrebuilts = true // XXX make these a scoped configuration instead.
)
var BuildGo func(ctx context.Context, pl pkggraph.PackageLoader, loc pkggraph.Location, _ *schema.ImageBuildPlan_GoBuild, unsafeCacheable bool) (build.Spec, error)
var BuildLLBGen func(schema.PackageName, *pkggraph.Module, build.Spec) build.Spec
var BuildAlpine func(pkggraph.Location, *schema.ImageBuildPlan_AlpineBuild) build.Spec
var BuildNix func(context.Context, pkggraph.PackageLoader, schema.PackageName, *pkggraph.Module, fs.FS) (build.Spec, error)
var BuildNodejs func(cfg.Context, pkggraph.Location, *schema.NodejsBuild, assets.AvailableBuildAssets) (build.Spec, error)
var BuildStaticFilesServer func(*schema.ImageBuildPlan_StaticFilesServer) build.Spec
var prebuiltsConfType = cfg.DefineConfigType[*Prebuilts]()
const LLBGenBinaryName = "llbgen"
type Prepared struct {
Location pkggraph.Location
Name string
Plan build.Plan
Command []string
Args []string
Env []*schema.BinaryConfig_EnvEntry
WorkingDir string
Labels []*schema.Label
}
type PreparedImage struct {
Name string
Image compute.Computable[oci.Image]
Command []string
}
type BuildImageOpts struct {
UsePrebuilts bool
Platforms []specs.Platform
}
// Returns a Prepared.
func Plan(ctx context.Context, pkg *pkggraph.Package, binName string, env pkggraph.SealedContext, assets assets.AvailableBuildAssets, opts BuildImageOpts) (*Prepared, error) {
binary, err := pkg.LookupBinary(binName)
if err != nil {
return nil, err
}
return PlanBinary(ctx, env, env, pkg.Location, binary, assets, opts)
}
func Load(ctx context.Context, pl pkggraph.PackageLoader, env cfg.Context, ref *schema.PackageRef, opts BuildImageOpts) (*Prepared, error) {
pkg, bin, err := pkggraph.LoadBinary(ctx, pl, ref)
if err != nil {
return nil, err
}
return PlanBinary(ctx, pl, env, pkg.Location, bin, assets.AvailableBuildAssets{}, opts)
}
func PlanBinary(ctx context.Context, pl pkggraph.PackageLoader, env cfg.Context, loc pkggraph.Location, binary *schema.Binary, assets assets.AvailableBuildAssets, opts BuildImageOpts) (*Prepared, error) {
spec, err := planImage(ctx, pl, env, loc, binary, assets, opts)
if err != nil {
return nil, err
}
platforms := opts.Platforms
if spec.PlatformIndependent() {
platforms = nil
}
plan := build.Plan{
SourcePackage: loc.PackageName,
SourceLabel: fmt.Sprintf("Binary %s", loc.PackageName),
BuildKind: storage.Build_BINARY,
Spec: spec,
Workspace: loc.Module,
Platforms: platforms,
}
return &Prepared{
Location: loc,
Name: binary.Name,
Plan: plan,
Command: binary.Config.GetCommand(),
Args: binary.Config.GetArgs(),
Env: binary.Config.GetEnv(),
WorkingDir: binary.Config.GetWorkingDir(),
Labels: binary.GetLabels(),
}, nil
}
func (p Prepared) Image(ctx context.Context, env pkggraph.SealedContext) (compute.Computable[oci.ResolvableImage], error) {
return multiplatform.PrepareMultiPlatformImage(ctx, env, p.Plan)
}
func PrebuiltImageID(ctx context.Context, loc pkggraph.Location, cfg cfg.Configuration) (*oci.ImageID, error) {
if !UsePrebuilts {
return nil, nil
}
prebuilts := loc.Module.Workspace.PrebuiltBinary
if conf, ok := prebuiltsConfType.CheckGet(cfg); ok {
prebuilts = append(prebuilts, conf.PrebuiltBinary...)
fmt.Fprintf(console.Debug(ctx), "Adding %d prebuilts from planning configuration.\n", len(conf.PrebuiltBinary))
}
var selected *oci.ImageID
for _, prebuilt := range prebuilts {
if prebuilt.PackageName == loc.PackageName.String() {
imgid := oci.ImageID{Repository: prebuilt.Repository, Digest: prebuilt.Digest}
if imgid.Repository == "" {
if loc.Module.Workspace.PrebuiltBaseRepository == "" {
break // Silently fail.
}
imgid.Repository = filepath.Join(loc.Module.Workspace.PrebuiltBaseRepository, prebuilt.PackageName)
}
if selected == nil {
selected = &imgid
continue
}
if imgid.Repository != selected.Repository {
return nil, fnerrors.NewWithLocation(loc, "conflicting repositories for prebuilt: %s vs %s", imgid.Repository, selected.Repository)
}
if imgid.Digest != selected.Digest {
return nil, fnerrors.NewWithLocation(loc, "conflicting digest for prebuilt: %s vs %s", imgid.Digest, selected.Digest)
}
}
}
return selected, nil
}
func planImage(ctx context.Context, pl pkggraph.PackageLoader, env cfg.Context, loc pkggraph.Location, bin *schema.Binary, assets assets.AvailableBuildAssets, opts BuildImageOpts) (build.Spec, error) {
// We prepare the build spec, as we need information, e.g. whether it's platform independent,
// if a prebuilt is specified.
spec, err := buildLayeredSpec(ctx, pl, env, loc, bin, assets, opts)
if err != nil {
return nil, err
}
if opts.UsePrebuilts {
imgid, err := PrebuiltImageID(ctx, loc, env.Configuration())
if err != nil {
return nil, err
}
if imgid != nil {
return build.PrebuiltPlan(*imgid, spec.PlatformIndependent(), build.PrebuiltResolveOpts()), nil
}
}
return spec, nil
}
func buildLayeredSpec(ctx context.Context, pl pkggraph.PackageLoader, env cfg.Context, loc pkggraph.Location, bin *schema.Binary, assets assets.AvailableBuildAssets, opts BuildImageOpts) (build.Spec, error) {
src := bin.BuildPlan
if src == nil || len(src.LayerBuildPlan) == 0 {
return nil, fnerrors.NewWithLocation(loc, "%s: don't know how to build, missing build plan", bin.Name)
}
if len(src.LayerBuildPlan) == 1 {
return buildSpec(ctx, pl, env, loc, bin, src.LayerBuildPlan[0], assets, opts)
}
specs := make([]build.Spec, len(src.LayerBuildPlan))
descriptions := make([]string, len(src.LayerBuildPlan))
platformIndependent := true
for k, plan := range src.LayerBuildPlan {
var err error
specs[k], err = buildSpec(ctx, pl, env, loc, bin, plan, assets, opts)
if err != nil {
return nil, err
}
if !specs[k].PlatformIndependent() {
platformIndependent = false
}
if plan.Description == "" {
descriptions[k] = fmt.Sprintf("plan#%d", k)
} else {
descriptions[k] = plan.Description
}
}
return MergeSpecs{Specs: specs, Descriptions: descriptions, platformIndependent: platformIndependent}, nil
}
func buildSpec(ctx context.Context, pl pkggraph.PackageLoader, env cfg.Context, loc pkggraph.Location, bin *schema.Binary, src *schema.ImageBuildPlan, assets assets.AvailableBuildAssets, opts BuildImageOpts) (build.Spec, error) {
if src == nil {
return nil, fnerrors.NewWithLocation(loc, "don't know how to build %q: no plan", bin.Name)
}
if imageId := src.ImageId; imageId != "" {
imgId, err := oci.ParseImageID(imageId)
if err != nil {
return nil, err
}
return build.PrebuiltPlan(imgId, false /* platformIndependent */, build.PrebuiltResolveOpts()), nil
}
if goPackage := src.GoPackage; goPackage != "" {
// Note, regardless of what config.command has been set to, we always build a
// binary named bin.Name.
return BuildGo(ctx, pl, loc, &schema.ImageBuildPlan_GoBuild{
RelPath: goPackage,
BinaryName: bin.Name,
}, false)
}
if src.GoBuild != nil {
return BuildGo(ctx, pl, loc, src.GoBuild, false)
}
if src.NodejsBuild != nil {
return BuildNodejs(env, loc, src.NodejsBuild, assets)
}
if llb := src.LlbPlan; llb != nil {
spec, err := buildLayeredSpec(ctx, pl, env, loc, llb.OutputOf, assets, opts)
if err != nil {
return nil, err
}
return BuildLLBGen(loc.PackageName, loc.Module, spec), nil
}
if alpine := src.AlpineBuild; alpine != nil {
return BuildAlpine(loc, alpine), nil
}
if nix := src.NixFlake; nix != "" {
return BuildNix(ctx, pl, loc.PackageName, loc.Module, loc.Module.ReadOnlyFS())
}
if dockerFile := src.Dockerfile; dockerFile != "" {
spec, err := dockerfile.Build(loc.Rel(), &schema.ImageBuildPlan_DockerBuild{Dockerfile: dockerFile})
if err != nil {
return nil, fnerrors.AttachLocation(loc, err)
}
return spec, nil
}
if d := src.DockerBuild; d != nil {
spec, err := dockerfile.Build(loc.Rel(), d)
if err != nil {
return nil, fnerrors.AttachLocation(loc, err)
}
return spec, nil
}
if binRef := src.Binary; binRef != nil {
binPkg, binary, err := pkggraph.LoadBinary(ctx, pl, binRef)
if err != nil {
return nil, err
}
spec, err := planImage(ctx, pl, env, binPkg.Location, binary, assets, opts)
if err != nil {
return nil, err
}
return spec, nil
}
if src.StaticFilesServer != nil {
return BuildStaticFilesServer(src.StaticFilesServer), nil
}
if len(src.SnapshotFiles) > 0 {
return snapshotFiles{loc.Rel(), src.SnapshotFiles}, nil
}
if src.FilesFrom != nil {
inner, err := buildSpec(ctx, pl, env, loc, bin, src.FilesFrom.From, assets, opts)
if err != nil {
return nil, err
}
return filesFrom{inner, src.FilesFrom.Files, src.FilesFrom.TargetDir}, nil
}
if src.MakeFsImage != nil {
inner, err := buildSpec(ctx, pl, env, loc, bin, src.MakeFsImage.From, assets, opts)
if err != nil {
return nil, err
}
switch kind := strings.ToLower(src.MakeFsImage.Kind); kind {
case "squashfs", "squash":
return makeSquashFS{inner, src.MakeFsImage.Target}, nil
case "ext4fs", "ext4":
return makeExt4Image{inner, src.MakeFsImage.Target, src.MakeFsImage.Size}, nil
case "tar", "tgz":
return makeTarImage{inner, src.MakeFsImage.Target, kind == "tgz"}, nil
default:
return nil, fnerrors.BadInputError("make_fs_image: unsupported filesystem %q", src.MakeFsImage.Kind)
}
}
return nil, fnerrors.NewWithLocation(loc, "don't know how to build binary image: `from` statement does not yield a build unit")
}
func EnsureImage(ctx context.Context, env pkggraph.SealedContext, registry registry.Manager, prepared *Prepared) (oci.ImageID, error) {
img, err := prepared.Image(ctx, env)
if err != nil {
return oci.ImageID{}, err
}
name := registry.AllocateName(prepared.Name, "")
return compute.GetValue(ctx, oci.PublishResolvable(name, img, prepared.Plan))
}