use script-dependencies.nix as a nix shell environment instead of specifying dependencies in shebangs of each individual script file

nixos/script-dependencies.nix

@@ -0,0 +1,15 @@
+let
+  nixpkgs = fetchTarball
+    "https://github.com/NixOS/nixpkgs/archive/nixos-unstable.tar.gz";
+  pkgs = import nixpkgs {
+    config = { };
+    overlays = [ ];
+  };
+in pkgs.mkShellNoCC {
+  packages = with pkgs; [
+    libnotify
+    python312
+    python312Packages.requests
+    python312Packages.pyperclip
+  ];
+}

scripts/common/common.py

@@ -30,10 +30,10 @@ def notify(
 
 
 def read_secret_file(secret: str) -> str:
-    path = f"/run/secrets/{secret}"
+    path = f"/var/secrets/{secret}"
     if not os.path.exists(path):
-        raise FileNotFoundError(f"Secret file {path} does not exist.")
+        raise FileNotFoundError(f"Secret file {path} does not exist or cannot be read.")
-    with open(f"/run/secrets/{secret}", "r") as f:
+    with open(f"/var/secrets/{secret}", "r") as f:
         secret = f.read().strip()
     if not secret:
         raise ValueError(f"Secret file {path} is empty.")

scripts/spectacle-screenshot.py

@@ -1,5 +1,5 @@
 #! /usr/bin/env nix-shell
-#! nix-shell -i python -p python312 libnotify
+#! nix-shell /etc/nixos/nixos/script-dependencies.nix -i python
 
 import argparse
 import os
@@ -73,7 +73,7 @@ def spectacle_screenshot(
         finally:
             if Path(file_path).exists() and use_temp_file:
                 os.remove(file_path)
-    except Exception as e:
+    except BaseException as e:
         notify(
             application_name="Spectacle",
             title="An error occurred",

scripts/zipline.py

@@ -1,5 +1,5 @@
 #! /usr/bin/env nix-shell
-#! nix-shell -i python -p python312 python312Packages.pyperclip python312Packages.requests libnotify
+#! nix-shell /etc/nixos/nixos/script-dependencies.nix -i python
 
 import argparse
 import mimetypes
@@ -66,7 +66,7 @@ def zipline(
             error_message = response.text
             raise Exception(error_message)
 
-    except Exception as e:
+    except BaseException as e:
         if use_notify_send:
             notify(
                 application_name=application_name,