Fix binary extraction flow

docs/developer-guide.md

@@ -78,7 +78,13 @@ dotnet publish -c Release -r linux-x64 --self-contained
 dotnet publish -c Release -r win-x64 --self-contained
 ```
 
-3. Archive and package binaries into `./dist/`:
+3. Build a binary for MacOS:
+
+```bash
+dotnet publish -c Release -r osx-x64 --self-contained
+```
+
+4. Archive and package binaries into `./dist/`:
 
 
 ## Running Tests

src/python_redlines/engines.py

@@ -12,9 +12,9 @@
 
 class XmlPowerToolsEngine(object):
     def __init__(self):
-        self.extracted_binaries_path = self._unzip_binary()
+        self.extracted_binaries_path = self.__unzip_binary()
 
-    def _unzip_binary(self):
+    def __unzip_binary(self):
         """
         Unzips the appropriate C# binary for the current platform.
         """
@@ -25,37 +25,60 @@ def _unzip_binary(self):
         if not os.path.exists(target_path):
             os.makedirs(target_path)
 
+        # Get the binary name and zip name based on the OS and architecture
+        binary_name, zip_name = self.__get_binaries_info()
+
+        # Check if the binary already exists. If not, extract it.
+        full_binary_path = os.path.join(target_path, binary_name)
+
+        if not os.path.exists(full_binary_path):
+            zip_path = os.path.join(binaries_path, zip_name)
+            self.__extract_binary(zip_path, target_path)
+
+        return os.path.join(target_path, binary_name)
+
+    def __extract_binary(self, zip_path: str, target_path: str):
+        """
+        Extracts the binary from the zip file based on the extension. Supports .zip and .tar.gz files
+        :parameter
+            zip_path: str - The path to the zip file
+            target_path: str - The path to extract the binary to
+        """
+
+        if zip_path.endswith('.zip'):
+            with zipfile.ZipFile(zip_path, 'r') as zip_ref:
+                zip_ref.extractall(target_path)
+
+        elif zip_path.endswith('.tar.gz'):
+            with tarfile.open(zip_path, 'r:gz') as tar_ref:
+                tar_ref.extractall(target_path)
+
+    def __get_binaries_info(self):
+        """
+        Returns the binary name and zip name based on the OS and architecture
+        :return
+            binary_name: str - The name of the binary file
+            zip_name: str - The name of the zip file
+        """
         os_name = platform.system().lower()
         arch = 'x64'  # Assuming x64 architecture
 
         if os_name == 'linux':
             zip_name = f"linux-{arch}-{__version__}.tar.gz"
             binary_name = 'linux-x64/redlines'
-            zip_path = os.path.join(binaries_path, zip_name)
-            if not os.path.exists(zip_path):
-                with tarfile.open(zip_path, 'r:gz') as tar_ref:
-                    tar_ref.extractall(target_path)
 
         elif os_name == 'windows':
             zip_name = f"win-{arch}-{__version__}.zip"
             binary_name = 'win-x64/redlines.exe'
-            zip_path = os.path.join(binaries_path, zip_name)
-            if not os.path.exists(zip_path):
-                with zipfile.ZipFile(zip_path, 'r') as zip_ref:
-                    zip_ref.extractall(target_path)
 
         elif os_name == 'darwin':
             zip_name = f"osx-{arch}-{__version__}.tar.gz"
             binary_name = 'osx-x64/redlines'
-            zip_path = os.path.join(binaries_path, zip_name)
-            if not os.path.exists(zip_path):
-                with tarfile.open(zip_path, 'r:gz') as tar_ref:
-                    tar_ref.extractall(target_path)
 
         else:
             raise EnvironmentError("Unsupported OS")
 
-        return os.path.join(target_path, binary_name)
+        return binary_name, zip_name
 
     def run_redline(self, author_tag: str, original: Union[bytes, Path], modified: Union[bytes, Path]) \
             -> Tuple[bytes, Optional[str], Optional[str]]: