more refactor

scripts/wasm-common.sh

@@ -0,0 +1,43 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+REPO_ROOT="$(cd "$SCRIPT_DIR/.." && pwd)"
+
+resolve_openssl_precompiled_dir() {
+  local candidate
+
+  for candidate in \
+    "${OPENSSL_WASM:-}" \
+    "${OPENSSL_ROOT:-}" \
+    "${OPENSSL_PRECOMPILED_DIR:-}" \
+    "$REPO_ROOT/openssl-wasm/precompiled" \
+    "$REPO_ROOT/wasm/openssl/precompiled" \
+    "$REPO_ROOT/wasm/vendor/openssl-wasm/precompiled" \
+    "$REPO_ROOT/wasm/openssl-wasm/precompiled"
+  do
+    if [[ -n "$candidate" && -d "$candidate" ]]; then
+      printf '%s\n' "$candidate"
+      return 0
+    fi
+  done
+
+  return 1
+}
+
+activate_emscripten() {
+  if [[ -n "${EMSDK_ENV:-}" ]]; then
+    if [[ ! -f "${EMSDK_ENV}" ]]; then
+      echo "EMSDK_ENV does not exist: ${EMSDK_ENV}" >&2
+      return 1
+    fi
+
+    # shellcheck disable=SC1090
+    . "${EMSDK_ENV}"
+  fi
+
+  if ! command -v emcc >/dev/null 2>&1 || ! command -v em++ >/dev/null 2>&1; then
+    echo "Emscripten is not available. Install it or set EMSDK_ENV to emsdk_env.sh." >&2
+    return 1
+  fi
+}