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meta.go
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meta.go
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package llb
import (
"fmt"
"net"
"path"
"github.com/containerd/containerd/platforms"
"github.com/google/shlex"
"github.com/moby/buildkit/solver/pb"
specs "github.com/opencontainers/image-spec/specs-go/v1"
)
type contextKeyT string
var (
keyArgs = contextKeyT("llb.exec.args")
keyDir = contextKeyT("llb.exec.dir")
keyEnv = contextKeyT("llb.exec.env")
keyUser = contextKeyT("llb.exec.user")
keyExtraHost = contextKeyT("llb.exec.extrahost")
keyPlatform = contextKeyT("llb.platform")
keyNetwork = contextKeyT("llb.network")
keySecurity = contextKeyT("llb.security")
)
func addEnvf(key, value string, v ...interface{}) StateOption {
return func(s State) State {
return s.WithValue(keyEnv, getEnv(s).AddOrReplace(key, fmt.Sprintf(value, v...)))
}
}
func dir(str string) StateOption {
return dirf(str)
}
func dirf(str string, v ...interface{}) StateOption {
return func(s State) State {
value := fmt.Sprintf(str, v...)
if !path.IsAbs(value) {
prev := getDir(s)
if prev == "" {
prev = "/"
}
value = path.Join(prev, value)
}
return s.WithValue(keyDir, value)
}
}
func user(str string) StateOption {
return func(s State) State {
return s.WithValue(keyUser, str)
}
}
func reset(s_ State) StateOption {
return func(s State) State {
s = NewState(s.Output())
s.ctx = s_.ctx
return s
}
}
func getEnv(s State) EnvList {
v := s.Value(keyEnv)
if v != nil {
return v.(EnvList)
}
return EnvList{}
}
func getDir(s State) string {
v := s.Value(keyDir)
if v != nil {
return v.(string)
}
return ""
}
func getArgs(s State) []string {
v := s.Value(keyArgs)
if v != nil {
return v.([]string)
}
return nil
}
func getUser(s State) string {
v := s.Value(keyUser)
if v != nil {
return v.(string)
}
return ""
}
func args(args ...string) StateOption {
return func(s State) State {
return s.WithValue(keyArgs, args)
}
}
func shlexf(str string, v ...interface{}) StateOption {
return func(s State) State {
arg, err := shlex.Split(fmt.Sprintf(str, v...))
if err != nil {
// TODO: handle error
}
return args(arg...)(s)
}
}
func platform(p specs.Platform) StateOption {
return func(s State) State {
return s.WithValue(keyPlatform, platforms.Normalize(p))
}
}
func getPlatform(s State) *specs.Platform {
v := s.Value(keyPlatform)
if v != nil {
p := v.(specs.Platform)
return &p
}
return nil
}
func extraHost(host string, ip net.IP) StateOption {
return func(s State) State {
return s.WithValue(keyExtraHost, append(getExtraHosts(s), HostIP{Host: host, IP: ip}))
}
}
func getExtraHosts(s State) []HostIP {
v := s.Value(keyExtraHost)
if v != nil {
return v.([]HostIP)
}
return nil
}
type HostIP struct {
Host string
IP net.IP
}
func network(v pb.NetMode) StateOption {
return func(s State) State {
return s.WithValue(keyNetwork, v)
}
}
func getNetwork(s State) pb.NetMode {
v := s.Value(keyNetwork)
if v != nil {
n := v.(pb.NetMode)
return n
}
return NetModeSandbox
}
func security(v pb.SecurityMode) StateOption {
return func(s State) State {
return s.WithValue(keySecurity, v)
}
}
func getSecurity(s State) pb.SecurityMode {
v := s.Value(keySecurity)
if v != nil {
n := v.(pb.SecurityMode)
return n
}
return SecurityModeSandbox
}
type EnvList []KeyValue
type KeyValue struct {
key string
value string
}
func (e EnvList) AddOrReplace(k, v string) EnvList {
e = e.Delete(k)
e = append(e, KeyValue{key: k, value: v})
return e
}
func (e EnvList) SetDefault(k, v string) EnvList {
if _, ok := e.Get(k); !ok {
e = append(e, KeyValue{key: k, value: v})
}
return e
}
func (e EnvList) Delete(k string) EnvList {
e = append([]KeyValue(nil), e...)
if i, ok := e.Index(k); ok {
return append(e[:i], e[i+1:]...)
}
return e
}
func (e EnvList) Get(k string) (string, bool) {
if index, ok := e.Index(k); ok {
return e[index].value, true
}
return "", false
}
func (e EnvList) Index(k string) (int, bool) {
for i, kv := range e {
if kv.key == k {
return i, true
}
}
return -1, false
}
func (e EnvList) ToArray() []string {
out := make([]string, 0, len(e))
for _, kv := range e {
out = append(out, kv.key+"="+kv.value)
}
return out
}