60 lines
1.6 KiB
Go
60 lines
1.6 KiB
Go
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//go:build !windows
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package plugins
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import (
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"context"
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"fmt"
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"os"
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"github.com/stealthrocket/wasi-go/imports"
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wazergo_wasip1 "github.com/stealthrocket/wasi-go/imports/wasi_snapshot_preview1"
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"github.com/stealthrocket/wazergo"
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"github.com/tetratelabs/wazero"
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wazero_wasip1 "github.com/tetratelabs/wazero/imports/wasi_snapshot_preview1"
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)
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type ContextApplier func(ctx context.Context) context.Context
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// InstantiateHost instantiates the Host module according to the guest requirements (for now only SocketExtensions).
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func InstantiateHost(ctx context.Context, runtime wazero.Runtime, mod wazero.CompiledModule, settings Settings) (ContextApplier, error) {
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if extension := imports.DetectSocketsExtension(mod); extension != nil {
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envs := []string{}
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for _, env := range settings.Envs {
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envs = append(envs, fmt.Sprintf("%s=%s", env, os.Getenv(env)))
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}
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builder := imports.NewBuilder().WithSocketsExtension("auto", mod)
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if len(envs) > 0 {
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builder.WithEnv(envs...)
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}
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if len(settings.Mounts) > 0 {
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builder.WithDirs(settings.Mounts...)
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}
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ctx, sys, err := builder.Instantiate(ctx, runtime)
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if err != nil {
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return nil, err
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}
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inst, err := wazergo.Instantiate(ctx, runtime, wazergo_wasip1.NewHostModule(*extension), wazergo_wasip1.WithWASI(sys))
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if err != nil {
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return nil, fmt.Errorf("wazergo instantiation: %w", err)
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}
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return func(ctx context.Context) context.Context {
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return wazergo.WithModuleInstance(ctx, inst)
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}, nil
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}
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_, err := wazero_wasip1.Instantiate(ctx, runtime)
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if err != nil {
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return nil, fmt.Errorf("wazero instantiation: %w", err)
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}
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return func(ctx context.Context) context.Context {
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return ctx
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}, nil
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}
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