fix

wasmbuild/_stubs/buf_buffer_unix.go

@@ -1,4 +1,5 @@
-// This file is substituted in via `go build -overlay` for the js/wasm build ONLY.
+// This file is copied over the upstream sing source (in a build-local copy of the
+// module) for the js/wasm build ONLY; see build.sh.
 //
 // Upstream common/buf/buffer_unix.go (build tag `!windows`) defines
 // Buffer.Iovec returning golang.org/x/sys/unix.Iovec, which does not exist for

wasmbuild/_stubs/bufio_copy_direct_posix.go

@@ -1,4 +1,5 @@
-// Substituted in via `go build -overlay` for the js/wasm build ONLY.
+// Copied over the upstream sing source (in a build-local copy of the module) for
+// the js/wasm build ONLY; see build.sh.
 //
 // Upstream common/bufio/copy_direct_posix.go (build tag `!windows`) implements
 // the syscall read-waiters using golang.org/x/sys/unix (readv/recvmsg). wait.go

wasmbuild/_stubs/bufio_vectorised_unix.go

@@ -1,4 +1,5 @@
-// Substituted in via `go build -overlay` for the js/wasm build ONLY.
+// Copied over the upstream sing source (in a build-local copy of the module) for
+// the js/wasm build ONLY; see build.sh.
 //
 // Upstream common/bufio/vectorised_unix.go (build tag `!windows`) implements the
 // syscall-based vectorised writers using golang.org/x/sys/unix (Iovec, writev,

wasmbuild/gen-overlay.sh

@@ -1,21 +0,0 @@
-#!/usr/bin/env bash
-# Generates the -overlay JSON that swaps the three sing source files that pull in
-# golang.org/x/sys/unix (unavailable for GOARCH=wasm) for wasm-safe stubs in
-# ./_stubs. Only the js/wasm build uses this overlay; native builds and tests are
-# unaffected. The stubs live in an underscore-prefixed directory so the go tool
-# ignores them during ./... builds (they carry mixed package names). See
-# _stubs/*.go for the rationale of each substitution.
-set -euo pipefail
-
-here="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
-sing="$(cd "$here/.." && go list -m -f '{{.Dir}}' github.com/sagernet/sing)"
-
-cat <<JSON
-{
-  "Replace": {
-    "$sing/common/buf/buffer_unix.go": "$here/_stubs/buf_buffer_unix.go",
-    "$sing/common/bufio/vectorised_unix.go": "$here/_stubs/bufio_vectorised_unix.go",
-    "$sing/common/bufio/copy_direct_posix.go": "$here/_stubs/bufio_copy_direct_posix.go"
-  }
-}
-JSON