Fix bug

.github/workflows/build_wheels.yml

@@ -30,7 +30,7 @@ jobs:
         run: go get github.com/keller-mark/esbuild-py
 
       - name: Build wheels
-        uses: pypa/cibuildwheel@v2.17.0
+        uses: pypa/cibuildwheel@v2.21.1
         env:
           CIBW_BEFORE_ALL_LINUX: ./scripts/cibw_linux_before_all.sh
           CIBW_ENVIRONMENT_LINUX: PATH=$PATH:/usr/local/go/bin:/go/bin

.github/workflows/test.yml

@@ -4,10 +4,12 @@ on: [push, pull_request]
 
 jobs:
   test_python:
-    runs-on: ubuntu-latest
+    runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        version: ['3.7', '3.11']
+        version: ['3.8', '3.12']
+        # macos-13 is an intel runner, macos-14 is apple silicon
+        os: [ubuntu-latest, windows-latest, macos-13, macos-14]
     steps:
       - uses: actions/checkout@v3
       - name: Set up Go 1.x

.gitignore

@@ -5,6 +5,7 @@
 *.so
 *.dylib
 *.wasm
+*.wat
 
 # Test binary, built with `go test -c`
 *.test
@@ -22,4 +23,7 @@ __pycache__/
 build/
 *.egg-info/
 dist/
-.pytest_cache/
+.pytest_cache/
+.pyodide-xbuildenv/
+.venv-pyodide/
+emsdk/

esbuild_bindings.go

@@ -1,10 +1,11 @@
 package main
 
-import (
-	"C"
-
-	"github.com/evanw/esbuild/pkg/api"
-)
+/*
+#include <stdlib.h>
+*/
+import "C"
+import "unsafe"
+import "github.com/evanw/esbuild/pkg/api"
 
 //export transform
 func transform(jsx *C.char) *C.char {
@@ -16,4 +17,9 @@ func transform(jsx *C.char) *C.char {
 	return C.CString(resultStr)
 }
 
+//export free_mem
+func free_mem(ptr *C.char) {
+	C.free(unsafe.Pointer(ptr))
+}
+
 func main() {}

src/esbuild_py/esbuild.py

@@ -1,6 +1,7 @@
 import ctypes
 from distutils.sysconfig import get_config_var
 from pathlib import Path
+from sys import platform
 import os
 import site
 
@@ -31,14 +32,18 @@ def get_lib_path():
 transform_binding = so.transform
 transform_binding.argtypes = [ctypes.c_char_p]
 transform_binding.restype = ctypes.c_void_p
-free = so.free
-free.argtypes = [ctypes.c_void_p]
+try:
+    free_mem_binding = so.free_mem
+    free_mem_binding.argtypes = [ctypes.c_void_p]
+except AttributeError:
+    free_mem_binding = None
 
 # Wrap the bound go function.
 def transform(jsx):
     res = transform_binding(jsx.encode('utf-8'))
     if res is not None:
         msg = ctypes.string_at(res).decode('utf-8')
-        free(res)
+        if free_mem_binding is not None:
+            free_mem_binding(res)
         return msg