package task import ( "context" "errors" "fmt" "net" "strings" "github.com/moby/buildkit/client/llb" "go.dagger.io/dagger/compiler" "go.dagger.io/dagger/plancontext" "go.dagger.io/dagger/solver" ) func init() { Register("Exec", func() Task { return &execTask{} }) } type execTask struct { } func (t execTask) Run(ctx context.Context, pctx *plancontext.Context, s solver.Solver, v *compiler.Value) (*compiler.Value, error) { // Get input state input, err := pctx.FS.FromValue(v.Lookup("input")) if err != nil { return nil, err } st, err := input.State() if err != nil { return nil, err } // Run opts, err := t.getRunOpts(v, pctx) if err != nil { return nil, err } st = st.Run(opts...).Root() // Solve result, err := s.Solve(ctx, st, pctx.Platform.Get()) if err != nil { return nil, err } // Fill result fs := pctx.FS.New(result) return compiler.NewValue().FillFields(map[string]interface{}{ "output": fs.MarshalCUE(), "exit": 0, }) } func (t execTask) getRunOpts(v *compiler.Value, pctx *plancontext.Context) ([]llb.RunOption, error) { opts := []llb.RunOption{} var cmd struct { Args []string Always bool } if err := v.Decode(&cmd); err != nil { return nil, err } // args opts = append(opts, llb.Args(cmd.Args)) // workdir workdir, err := v.Lookup("workdir").String() if err != nil { return nil, err } opts = append(opts, llb.Dir(workdir)) // env envs, err := v.Lookup("env").Fields() if err != nil { return nil, err } for _, env := range envs { if plancontext.IsSecretValue(env.Value) { secret, err := pctx.Secrets.FromValue(env.Value) if err != nil { return nil, err } opts = append(opts, llb.AddSecret(env.Label(), llb.SecretID(secret.ID()), llb.SecretAsEnv(true))) } else { s, err := env.Value.String() if err != nil { return nil, err } opts = append(opts, llb.AddEnv(env.Label(), s)) } } // always? if cmd.Always { // FIXME: also disables persistent cache directories // There's an ongoing proposal that would fix this: https://github.com/moby/buildkit/issues/1213 opts = append(opts, llb.IgnoreCache) } hosts, err := v.Lookup("hosts").Fields() if err != nil { return nil, err } for _, host := range hosts { s, err := host.Value.String() if err != nil { return nil, err } if err != nil { return nil, err } opts = append(opts, llb.AddExtraHost(host.Label(), net.ParseIP(s))) } user, err := v.Lookup("user").String() if err != nil { return nil, err } opts = append(opts, llb.User(user)) // mounts mntOpts, err := t.mountAll(pctx, v.Lookup("mounts")) if err != nil { return nil, err } opts = append(opts, mntOpts...) // marker for status events // FIXME args := make([]string, 0, len(cmd.Args)) for _, a := range cmd.Args { args = append(args, fmt.Sprintf("%q", a)) } opts = append(opts, withCustomName(v, "Exec [%s]", strings.Join(args, ", "))) return opts, nil } func (t execTask) mountAll(pctx *plancontext.Context, mounts *compiler.Value) ([]llb.RunOption, error) { opts := []llb.RunOption{} fields, err := mounts.Fields() if err != nil { return nil, err } for _, mnt := range fields { if mnt.Value.Lookup("dest").IsConcreteR() != nil { return nil, fmt.Errorf("mount %q is not concrete", mnt.Selector.String()) } dest, err := mnt.Value.Lookup("dest").String() if err != nil { return nil, err } o, err := t.mount(pctx, dest, mnt.Value) if err != nil { return nil, err } opts = append(opts, o) } return opts, err } func (t execTask) mount(pctx *plancontext.Context, dest string, mnt *compiler.Value) (llb.RunOption, error) { typ, err := mnt.Lookup("type").String() if err != nil { return nil, err } switch typ { case "cache": return t.mountCache(pctx, dest, mnt) case "tmp": return t.mountTmp(pctx, dest, mnt) case "socket": return t.mountService(pctx, dest, mnt) case "fs": return t.mountFS(pctx, dest, mnt) case "secret": return t.mountSecret(pctx, dest, mnt) case "": return nil, errors.New("no mount type specified") default: return nil, fmt.Errorf("unsupported mount type %q", typ) } } func (t *execTask) mountTmp(_ *plancontext.Context, dest string, _ *compiler.Value) (llb.RunOption, error) { // FIXME: handle size return llb.AddMount( dest, llb.Scratch(), llb.Tmpfs(), ), nil } func (t *execTask) mountCache(_ *plancontext.Context, dest string, mnt *compiler.Value) (llb.RunOption, error) { contents := mnt.Lookup("contents") idValue := contents.Lookup("id") if !idValue.IsConcrete() { return nil, fmt.Errorf("cache %q is not set", mnt.Path().String()) } id, err := idValue.String() if err != nil { return nil, err } concurrency, err := contents.Lookup("concurrency").String() if err != nil { return nil, err } var mode llb.CacheMountSharingMode switch concurrency { case "shared": mode = llb.CacheMountShared case "private": mode = llb.CacheMountPrivate case "locked": mode = llb.CacheMountLocked default: return nil, fmt.Errorf("unknown concurrency mode %q", concurrency) } return llb.AddMount( dest, llb.Scratch(), llb.AsPersistentCacheDir( id, mode, ), ), nil } func (t *execTask) mountFS(pctx *plancontext.Context, dest string, mnt *compiler.Value) (llb.RunOption, error) { contents, err := pctx.FS.FromValue(mnt.Lookup("contents")) if err != nil { return nil, err } // possibly construct mount options for LLB from var mo []llb.MountOption // handle "path" option if source := mnt.Lookup("source"); source.Exists() { src, err := source.String() if err != nil { return nil, err } mo = append(mo, llb.SourcePath(src)) } if ro := mnt.Lookup("ro"); ro.Exists() { readonly, err := ro.Bool() if err != nil { return nil, err } if readonly { mo = append(mo, llb.Readonly) } } st, err := contents.State() if err != nil { return nil, err } return llb.AddMount(dest, st, mo...), nil } func (t *execTask) mountSecret(pctx *plancontext.Context, dest string, mnt *compiler.Value) (llb.RunOption, error) { contents, err := pctx.Secrets.FromValue(mnt.Lookup("contents")) if err != nil { return nil, err } opts := struct { UID int GID int Mask int }{} if err := mnt.Decode(&opts); err != nil { return nil, err } return llb.AddSecret(dest, llb.SecretID(contents.ID()), llb.SecretFileOpt(opts.UID, opts.GID, opts.Mask), ), nil } func (t *execTask) mountService(pctx *plancontext.Context, dest string, mnt *compiler.Value) (llb.RunOption, error) { contents, err := pctx.Services.FromValue(mnt.Lookup("contents")) if err != nil { return nil, err } return llb.AddSSHSocket( llb.SSHID(contents.ID()), llb.SSHSocketTarget(dest), ), nil }