feat: configure [backend] loads existing backend config rather than just overwriting it

1 files changed, 14 insertions, 0 deletions

diff --git a/app/backends/envs.py b/app/backends/envs.py
index 6e5b6cc..5a51a33 100644
--- a/app/backends/envs.py
+++ b/app/backends/envs.py
@@ -107,6 +107,20 @@ def pip_install(packages: List[str]) -> int:
         [str(env_python()), "-m", "pip", "install", *packages])
 
 
+def pip_uninstall(packages: List[str]) -> int:
+    """pip uninstall PACKAGES from the venv. Returns pip's exit code.
+
+    Used by the backends' ``uninstall`` action to remove pip-installed TTS
+    packages from the managed environment. A missing env is a no-op (there
+    is nothing to uninstall from), reported as success.
+    """
+    if not env_exists():
+        return 0
+    print(f"[INFO] pip uninstall {' '.join(packages)} from {ENV_DIR}...")
+    return common.run_console_subprocess(
+        [str(env_python()), "-m", "pip", "uninstall", "-y", *packages])
+
+
 def module_available(module: str) -> bool:
     """True when MODULE imports inside the venv (e.g. qwen_tts, faster_qwen3_tts).