feat(pipx support): Add support for pipx

This is a series of commits intended to add support for pipx in pacdef.
WIP.

Signed-off-by: innocentzero <isfarulhaque@proton.me>

crates/pacdef_core/src/backend/actual/python.rs

@@ -12,6 +12,7 @@ use crate::{Group, Package};
 
 #[derive(Debug, Clone)]
 pub struct Python {
+    pub(crate) binary: String,
     pub(crate) packages: HashSet<Package>,
 }
 
@@ -29,14 +30,24 @@ const SUPPORTS_AS_DEPENDENCY: bool = false;
 impl Backend for Python {
     impl_backend_constants!();
 
+    fn get_binary(&self) -> Text {
+        let r#box = self.binary.clone().into_boxed_str();
+        Box::leak(r#box)
+    }
+
     fn get_all_installed_packages(&self) -> Result<HashSet<Package>> {
-        let output = run_pip_command(&["list", "--format", "json", "--user"])?;
+        let mut cmd = Command::new(self.get_binary());
+        let output = run_pip_command(&mut cmd, self.get_switches_runtime())?;
 
         extract_pacdef_packages(output)
     }
 
     fn get_explicitly_installed_packages(&self) -> Result<HashSet<Package>> {
-        let output = run_pip_command(&["list", "--format", "json", "--not-required", "--user"])?;
+        let mut cmd = Command::new(self.get_binary());
+        let output = run_pip_command(
+            &mut cmd,
+            &["list", "--format", "json", "--not-required", "--user"],
+        )?;
 
         extract_pacdef_packages(output)
     }
@@ -46,8 +57,7 @@ impl Backend for Python {
     }
 }
 
-fn run_pip_command(args: &[&str]) -> Result<Value> {
+fn run_pip_command(cmd: &mut Command, args: &[&str]) -> Result<Value> {
-    let mut cmd = Command::new(BINARY);
     cmd.args(args);
     let output = String::from_utf8(cmd.output()?.stdout)?;
     let val: Value = serde_json::from_str(&output)?;
@@ -57,9 +67,18 @@ fn run_pip_command(args: &[&str]) -> Result<Value> {
 impl Python {
     pub(crate) fn new() -> Self {
         Self {
+            binary: BINARY.to_string(),
             packages: HashSet::new(),
         }
     }
+
+    fn get_switches_runtime(&self) -> Switches {
+        if self.get_binary().eq("pip") {
+            &["list", "--format", "json", "--user"]
+        } else {
+            &["list", "--json"]
+        }
+    }
 }
 
 fn extract_pacdef_packages(value: Value) -> Result<HashSet<Package>> {

crates/pacdef_core/src/config.rs

@@ -24,6 +24,9 @@ pub struct Config {
     /// Backends the user does not want to use even though the binary exists.
     #[serde(default)]
     pub disabled_backends: Vec<String>,
+    /// Choose whether to use pipx instead of pip for python package management
+    #[serde(default)]
+    pub pip_binary: String,
 }
 
 fn yes() -> bool {
@@ -86,6 +89,7 @@ impl Default for Config {
             flatpak_systemwide: true,
             warn_not_symlinks: true,
             disabled_backends: vec![],
+            pip_binary: "pip".into(),
         }
     }
 }

crates/pacdef_core/src/core.rs

@@ -140,6 +140,13 @@ impl Pacdef {
         {
             flatpak.systemwide = self.config.flatpak_systemwide;
         }
+
+        if let Some(python) = backend
+            .as_any_mut()
+            .downcast_mut::<crate::backend::Python>()
+        {
+            python.binary = self.config.pip_binary.clone();
+        }
     }
 
     fn install_packages(&mut self, noconfirm: bool) -> Result<()> {