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state.go
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state.go
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package llb
import (
"context"
"encoding/json"
"fmt"
"net"
"strings"
"github.com/containerd/containerd/platforms"
"github.com/moby/buildkit/identity"
"github.com/moby/buildkit/solver/pb"
"github.com/moby/buildkit/util/apicaps"
digest "github.com/opencontainers/go-digest"
ocispecs "github.com/opencontainers/image-spec/specs-go/v1"
)
type StateOption func(State) State
type Output interface {
ToInput(context.Context, *Constraints) (*pb.Input, error)
Vertex(context.Context, *Constraints) Vertex
}
type Vertex interface {
Validate(context.Context, *Constraints) error
Marshal(context.Context, *Constraints) (digest.Digest, []byte, *pb.OpMetadata, []*SourceLocation, error)
Output() Output
Inputs() []Output
}
func NewConstraints(co ...ConstraintsOpt) *Constraints {
defaultPlatform := platforms.Normalize(platforms.DefaultSpec())
c := &Constraints{
Platform: &defaultPlatform,
LocalUniqueID: identity.NewID(),
}
for _, o := range co {
o.SetConstraintsOption(c)
}
return c
}
func NewState(o Output) State {
s := State{
out: o,
}.Dir("/")
s = s.ensurePlatform()
return s
}
type State struct {
out Output
prev *State
key interface{}
value func(context.Context, *Constraints) (interface{}, error)
opts []ConstraintsOpt
async *asyncState
}
func (s State) ensurePlatform() State {
if o, ok := s.out.(interface {
Platform() *ocispecs.Platform
}); ok {
if p := o.Platform(); p != nil {
s = platform(*p)(s)
}
}
return s
}
func (s State) WithValue(k, v interface{}) State {
return s.withValue(k, func(context.Context, *Constraints) (interface{}, error) {
return v, nil
})
}
func (s State) withValue(k interface{}, v func(context.Context, *Constraints) (interface{}, error)) State {
return State{
out: s.Output(),
prev: &s, // doesn't need to be original pointer
key: k,
value: v,
}
}
func (s State) Value(ctx context.Context, k interface{}, co ...ConstraintsOpt) (interface{}, error) {
c := &Constraints{}
for _, f := range co {
f.SetConstraintsOption(c)
}
return s.getValue(k)(ctx, c)
}
func (s State) getValue(k interface{}) func(context.Context, *Constraints) (interface{}, error) {
if s.key == k {
return s.value
}
if s.async != nil {
return func(ctx context.Context, c *Constraints) (interface{}, error) {
err := s.async.Do(ctx, c)
if err != nil {
return nil, err
}
return s.async.target.getValue(k)(ctx, c)
}
}
if s.prev == nil {
return nilValue
}
return s.prev.getValue(k)
}
func (s State) Async(f func(context.Context, State, *Constraints) (State, error)) State {
s2 := State{
async: &asyncState{f: f, prev: s},
}
return s2
}
func (s State) SetMarshalDefaults(co ...ConstraintsOpt) State {
s.opts = co
return s
}
func (s State) Marshal(ctx context.Context, co ...ConstraintsOpt) (*Definition, error) {
c := NewConstraints(append(s.opts, co...)...)
def := &Definition{
Metadata: make(map[digest.Digest]pb.OpMetadata, 0),
Constraints: c,
}
if s.Output() == nil || s.Output().Vertex(ctx, c) == nil {
return def, nil
}
smc := newSourceMapCollector()
def, err := marshal(ctx, s.Output().Vertex(ctx, c), def, smc, map[digest.Digest]struct{}{}, map[Vertex]struct{}{}, c)
if err != nil {
return def, err
}
inp, err := s.Output().ToInput(ctx, c)
if err != nil {
return def, err
}
proto := &pb.Op{Inputs: []*pb.Input{inp}}
dt, err := proto.Marshal()
if err != nil {
return def, err
}
def.Def = append(def.Def, dt)
dgst := digest.FromBytes(dt)
md := def.Metadata[dgst]
md.Caps = map[apicaps.CapID]bool{
pb.CapConstraints: true,
pb.CapPlatform: true,
}
for _, m := range def.Metadata {
if m.IgnoreCache {
md.Caps[pb.CapMetaIgnoreCache] = true
}
if m.Description != nil {
md.Caps[pb.CapMetaDescription] = true
}
if m.ExportCache != nil {
md.Caps[pb.CapMetaExportCache] = true
}
}
def.Metadata[dgst] = md
sm, err := smc.Marshal(ctx, co...)
if err != nil {
return nil, err
}
def.Source = sm
return def, nil
}
func marshal(ctx context.Context, v Vertex, def *Definition, s *sourceMapCollector, cache map[digest.Digest]struct{}, vertexCache map[Vertex]struct{}, c *Constraints) (*Definition, error) {
if _, ok := vertexCache[v]; ok {
return def, nil
}
for _, inp := range v.Inputs() {
var err error
def, err = marshal(ctx, inp.Vertex(ctx, c), def, s, cache, vertexCache, c)
if err != nil {
return def, err
}
}
dgst, dt, opMeta, sls, err := v.Marshal(ctx, c)
if err != nil {
return def, err
}
vertexCache[v] = struct{}{}
if opMeta != nil {
def.Metadata[dgst] = mergeMetadata(def.Metadata[dgst], *opMeta)
}
s.Add(dgst, sls)
if _, ok := cache[dgst]; ok {
return def, nil
}
def.Def = append(def.Def, dt)
cache[dgst] = struct{}{}
return def, nil
}
func (s State) Validate(ctx context.Context, c *Constraints) error {
return s.Output().Vertex(ctx, c).Validate(ctx, c)
}
func (s State) Output() Output {
if s.async != nil {
return s.async.Output()
}
return s.out
}
func (s State) WithOutput(o Output) State {
prev := s
s = State{
out: o,
prev: &prev,
}
s = s.ensurePlatform()
return s
}
func (s State) WithImageConfig(c []byte) (State, error) {
var img ocispecs.Image
if err := json.Unmarshal(c, &img); err != nil {
return State{}, err
}
for _, env := range img.Config.Env {
parts := strings.SplitN(env, "=", 2)
if len(parts[0]) > 0 {
var v string
if len(parts) > 1 {
v = parts[1]
}
s = s.AddEnv(parts[0], v)
}
}
s = s.Dir(img.Config.WorkingDir)
if img.Architecture != "" && img.OS != "" {
s = s.Platform(ocispecs.Platform{
OS: img.OS,
Architecture: img.Architecture,
Variant: img.Variant,
})
}
return s, nil
}
func (s State) Run(ro ...RunOption) ExecState {
ei := &ExecInfo{State: s}
for _, o := range ro {
o.SetRunOption(ei)
}
exec := NewExecOp(ei.State, ei.ProxyEnv, ei.ReadonlyRootFS, ei.Constraints)
for _, m := range ei.Mounts {
exec.AddMount(m.Target, m.Source, m.Opts...)
}
exec.secrets = ei.Secrets
exec.ssh = ei.SSH
return ExecState{
State: s.WithOutput(exec.Output()),
exec: exec,
}
}
func (s State) File(a *FileAction, opts ...ConstraintsOpt) State {
var c Constraints
for _, o := range opts {
o.SetConstraintsOption(&c)
}
return s.WithOutput(NewFileOp(s, a, c).Output())
}
func (s State) AddEnv(key, value string) State {
return AddEnv(key, value)(s)
}
func (s State) AddEnvf(key, value string, v ...interface{}) State {
return AddEnvf(key, value, v...)(s)
}
func (s State) Dir(str string) State {
return Dir(str)(s)
}
func (s State) Dirf(str string, v ...interface{}) State {
return Dirf(str, v...)(s)
}
func (s State) GetEnv(ctx context.Context, key string, co ...ConstraintsOpt) (string, bool, error) {
c := &Constraints{}
for _, f := range co {
f.SetConstraintsOption(c)
}
env, err := getEnv(s)(ctx, c)
if err != nil {
return "", false, err
}
v, ok := env.Get(key)
return v, ok, nil
}
func (s State) Env(ctx context.Context, co ...ConstraintsOpt) ([]string, error) {
c := &Constraints{}
for _, f := range co {
f.SetConstraintsOption(c)
}
env, err := getEnv(s)(ctx, c)
if err != nil {
return nil, err
}
return env.ToArray(), nil
}
func (s State) GetDir(ctx context.Context, co ...ConstraintsOpt) (string, error) {
c := &Constraints{}
for _, f := range co {
f.SetConstraintsOption(c)
}
return getDir(s)(ctx, c)
}
func (s State) GetArgs(ctx context.Context, co ...ConstraintsOpt) ([]string, error) {
c := &Constraints{}
for _, f := range co {
f.SetConstraintsOption(c)
}
return getArgs(s)(ctx, c)
}
func (s State) Reset(s2 State) State {
return Reset(s2)(s)
}
func (s State) User(v string) State {
return User(v)(s)
}
func (s State) Hostname(v string) State {
return Hostname(v)(s)
}
func (s State) GetHostname(ctx context.Context, co ...ConstraintsOpt) (string, error) {
c := &Constraints{}
for _, f := range co {
f.SetConstraintsOption(c)
}
return getHostname(s)(ctx, c)
}
func (s State) Platform(p ocispecs.Platform) State {
return platform(p)(s)
}
func (s State) GetPlatform(ctx context.Context, co ...ConstraintsOpt) (*ocispecs.Platform, error) {
c := &Constraints{}
for _, f := range co {
f.SetConstraintsOption(c)
}
return getPlatform(s)(ctx, c)
}
func (s State) Network(n pb.NetMode) State {
return Network(n)(s)
}
func (s State) GetNetwork(ctx context.Context, co ...ConstraintsOpt) (pb.NetMode, error) {
c := &Constraints{}
for _, f := range co {
f.SetConstraintsOption(c)
}
return getNetwork(s)(ctx, c)
}
func (s State) Security(n pb.SecurityMode) State {
return Security(n)(s)
}
func (s State) GetSecurity(ctx context.Context, co ...ConstraintsOpt) (pb.SecurityMode, error) {
c := &Constraints{}
for _, f := range co {
f.SetConstraintsOption(c)
}
return getSecurity(s)(ctx, c)
}
func (s State) With(so ...StateOption) State {
for _, o := range so {
s = o(s)
}
return s
}
func (s State) AddExtraHost(host string, ip net.IP) State {
return extraHost(host, ip)(s)
}
func (s State) AddUlimit(name UlimitName, soft int64, hard int64) State {
return ulimit(name, soft, hard)(s)
}
func (s State) WithCgroupParent(cp string) State {
return cgroupParent(cp)(s)
}
func (s State) isFileOpCopyInput() {}
type output struct {
vertex Vertex
getIndex func() (pb.OutputIndex, error)
err error
platform *ocispecs.Platform
}
func (o *output) ToInput(ctx context.Context, c *Constraints) (*pb.Input, error) {
if o.err != nil {
return nil, o.err
}
var index pb.OutputIndex
if o.getIndex != nil {
var err error
index, err = o.getIndex()
if err != nil {
return nil, err
}
}
dgst, _, _, _, err := o.vertex.Marshal(ctx, c)
if err != nil {
return nil, err
}
return &pb.Input{Digest: dgst, Index: index}, nil
}
func (o *output) Vertex(context.Context, *Constraints) Vertex {
return o.vertex
}
func (o *output) Platform() *ocispecs.Platform {
return o.platform
}
type ConstraintsOpt interface {
SetConstraintsOption(*Constraints)
RunOption
LocalOption
HTTPOption
ImageOption
GitOption
OCILayoutOption
}
type constraintsOptFunc func(m *Constraints)
func (fn constraintsOptFunc) SetConstraintsOption(m *Constraints) {
fn(m)
}
func (fn constraintsOptFunc) SetRunOption(ei *ExecInfo) {
ei.applyConstraints(fn)
}
func (fn constraintsOptFunc) SetLocalOption(li *LocalInfo) {
li.applyConstraints(fn)
}
func (fn constraintsOptFunc) SetOCILayoutOption(oi *OCILayoutInfo) {
oi.applyConstraints(fn)
}
func (fn constraintsOptFunc) SetHTTPOption(hi *HTTPInfo) {
hi.applyConstraints(fn)
}
func (fn constraintsOptFunc) SetImageOption(ii *ImageInfo) {
ii.applyConstraints(fn)
}
func (fn constraintsOptFunc) SetGitOption(gi *GitInfo) {
gi.applyConstraints(fn)
}
func mergeMetadata(m1, m2 pb.OpMetadata) pb.OpMetadata {
if m2.IgnoreCache {
m1.IgnoreCache = true
}
if len(m2.Description) > 0 {
if m1.Description == nil {
m1.Description = make(map[string]string)
}
for k, v := range m2.Description {
m1.Description[k] = v
}
}
if m2.ExportCache != nil {
m1.ExportCache = m2.ExportCache
}
for k := range m2.Caps {
if m1.Caps == nil {
m1.Caps = make(map[apicaps.CapID]bool, len(m2.Caps))
}
m1.Caps[k] = true
}
if m2.ProgressGroup != nil {
m1.ProgressGroup = m2.ProgressGroup
}
return m1
}
var IgnoreCache = constraintsOptFunc(func(c *Constraints) {
c.Metadata.IgnoreCache = true
})
func WithDescription(m map[string]string) ConstraintsOpt {
return constraintsOptFunc(func(c *Constraints) {
if c.Metadata.Description == nil {
c.Metadata.Description = map[string]string{}
}
for k, v := range m {
c.Metadata.Description[k] = v
}
})
}
func WithCustomName(name string) ConstraintsOpt {
return WithDescription(map[string]string{
"llb.customname": name,
})
}
func WithCustomNamef(name string, a ...interface{}) ConstraintsOpt {
return WithCustomName(fmt.Sprintf(name, a...))
}
// WithExportCache forces results for this vertex to be exported with the cache
func WithExportCache() ConstraintsOpt {
return constraintsOptFunc(func(c *Constraints) {
c.Metadata.ExportCache = &pb.ExportCache{Value: true}
})
}
// WithoutExportCache sets results for this vertex to be not exported with
// the cache
func WithoutExportCache() ConstraintsOpt {
return constraintsOptFunc(func(c *Constraints) {
// ExportCache with value false means to disable exporting
c.Metadata.ExportCache = &pb.ExportCache{Value: false}
})
}
// WithoutDefaultExportCache resets the cache export for the vertex to use
// the default defined by the build configuration.
func WithoutDefaultExportCache() ConstraintsOpt {
return constraintsOptFunc(func(c *Constraints) {
// nil means no vertex based config has been set
c.Metadata.ExportCache = nil
})
}
// WithCaps exposes supported LLB caps to the marshaler
func WithCaps(caps apicaps.CapSet) ConstraintsOpt {
return constraintsOptFunc(func(c *Constraints) {
c.Caps = &caps
})
}
type constraintsWrapper struct {
Constraints
}
func (cw *constraintsWrapper) applyConstraints(f func(c *Constraints)) {
f(&cw.Constraints)
}
type Constraints struct {
Platform *ocispecs.Platform
WorkerConstraints []string
Metadata pb.OpMetadata
LocalUniqueID string
Caps *apicaps.CapSet
SourceLocations []*SourceLocation
}
func Platform(p ocispecs.Platform) ConstraintsOpt {
return constraintsOptFunc(func(c *Constraints) {
c.Platform = &p
})
}
func LocalUniqueID(v string) ConstraintsOpt {
return constraintsOptFunc(func(c *Constraints) {
c.LocalUniqueID = v
})
}
func ProgressGroup(id, name string, weak bool) ConstraintsOpt {
return constraintsOptFunc(func(c *Constraints) {
c.Metadata.ProgressGroup = &pb.ProgressGroup{Id: id, Name: name, Weak: weak}
})
}
var (
LinuxAmd64 = Platform(ocispecs.Platform{OS: "linux", Architecture: "amd64"})
LinuxArmhf = Platform(ocispecs.Platform{OS: "linux", Architecture: "arm", Variant: "v7"})
LinuxArm = LinuxArmhf
LinuxArmel = Platform(ocispecs.Platform{OS: "linux", Architecture: "arm", Variant: "v6"})
LinuxArm64 = Platform(ocispecs.Platform{OS: "linux", Architecture: "arm64"})
LinuxS390x = Platform(ocispecs.Platform{OS: "linux", Architecture: "s390x"})
LinuxPpc64 = Platform(ocispecs.Platform{OS: "linux", Architecture: "ppc64"})
LinuxPpc64le = Platform(ocispecs.Platform{OS: "linux", Architecture: "ppc64le"})
Darwin = Platform(ocispecs.Platform{OS: "darwin", Architecture: "amd64"})
Windows = Platform(ocispecs.Platform{OS: "windows", Architecture: "amd64"})
)
func Require(filters ...string) ConstraintsOpt {
return constraintsOptFunc(func(c *Constraints) {
c.WorkerConstraints = append(c.WorkerConstraints, filters...)
})
}
func nilValue(context.Context, *Constraints) (interface{}, error) {
return nil, nil
}