skip install on init if package installed already

src/initialize.py

@@ -1,15 +1,30 @@
+from importlib.util import find_spec
 from os import system
 
 from src import log
 
 
-def install_via_pacman(package: str):
+def install_via_pacman_if_not_installed(package: str, test_command: str = ""):
+    if test_command == "":
+        test_command = package
+
+    # Cannot use src.util.command_exists because some
+    # python packages may not be installed yet.
+    if not system(f"command -v {test_command} > /dev/null"):
+        return
+
     if system(f"paru -S --noconfirm {package} > /dev/null"):
         log.error(f"Failed to install {package} via pacman")
         exit(1)
 
 
-def install_via_pip(package: str):
+def install_via_pip_if_not_installed(package: str, package_import: str = ""):
+    if package_import == "":
+        package_import = package
+
+    if find_spec(package_import):
+        return
+
     if system(f"pip install {package} > /dev/null"):
         log.error(f"Failed to install {package} via pip")
         exit(1)
@@ -19,13 +34,11 @@ def initialize():
     """Make sure everything is prepared for the install scripts to run.
     You may assume Any function can be called after running this function."""
 
-    print("Initializing...")
+    install_via_pacman_if_not_installed("trash-cli", "trash-put")
+    install_via_pacman_if_not_installed("flatpak", "flatpak")
+    install_via_pacman_if_not_installed("python-pip", "pip")
 
-    install_via_pacman("trash-cli")
-    install_via_pacman("flatpak")
-    install_via_pacman("python-pip")
-
-    install_via_pip("requests")
-    install_via_pip("PyYAML")
-    install_via_pip("inquirer")
-    install_via_pip("tqdm")
+    install_via_pip_if_not_installed("requests")
+    install_via_pip_if_not_installed("PyYAML", "yaml")
+    install_via_pip_if_not_installed("inquirer")
+    install_via_pip_if_not_installed("tqdm")