Fix macOS builds by removing hardcoded CI paths

Author: tclesius

libs.json

@@ -30,7 +30,7 @@
         "system": "Darwin",
         "machine": "x86_64",
         "pointer_size": 64,
-        "libdir": "/Users/runner/work/_temp/install/lib",
+        "libdir": "./libmacos",
         "sysname": "macos",
         "so_name": "libcurl-impersonate.4.dylib",
         "so_arch": "x86_64"
@@ -39,7 +39,7 @@
         "system": "Darwin",
         "machine": "arm64",
         "pointer_size": 64,
-        "libdir": "/Users/runner/work/_temp/install/lib",
+        "libdir": "./libmacos",
         "sysname": "macos",
         "so_name": "libcurl-impersonate.4.dylib",
         "so_arch": "arm64"

pyproject.toml

@@ -118,6 +118,8 @@ environment-pass = ["LD_LIBRARY_PATH"]
 
 [tool.cibuildwheel.macos]
 before-all = "gmake preprocess"
+before-build = "pip install setuptools cffi"
+build-frontend = "pip; args: --no-build-isolation"
 
 [tool.cibuildwheel.windows]
 before-build = "pip install delvewheel"

scripts/build.py

@@ -79,6 +79,12 @@ def download_libcurl():
         for file in glob(os.path.join(arch["libdir"], "bin/*.dll")):
             shutil.move(file, arch["libdir"])
 
+    if arch["system"] == "Darwin":
+        # Fix the install name baked into the upstream dylib so delocate can find it
+        dylib = os.path.join(arch["libdir"], arch["so_name"])
+        abs_dylib = os.path.abspath(dylib)
+        os.system(f"install_name_tool -id {abs_dylib} {dylib}")
+
     print("Files after unpacking")
     print(os.listdir(arch["libdir"]))