add package manager recognition

1 files changed, 81 insertions, 4 deletions

diff --git a/src/packages.rs b/src/packages.rs
index 5ee5664..2eadcfc 100644
--- a/src/packages.rs
+++ b/src/packages.rs
@@ -1,19 +1,96 @@
+use std::{fs::File, io::Read};
+
+use pacman::Pacman;
+use portage::Portage;
 use serde::{Deserialize, Serialize};
 
-use crate::error::Result;
+use crate::error::{Error, Result};
 
-pub mod pacman;
-pub mod portage;
+#[cfg(feature = "pacman")]
+mod pacman;
+#[cfg(feature = "portage")]
+mod portage;
 
 #[derive(Debug, Serialize, Deserialize)]
+pub struct PackageList {
+    packages: Vec<Package>,
+    manager: Manager,
+}
+
+impl PackageList {
+    pub fn install(&self) -> Result<()> {
+        self.manager.to_package_manager().install(self.packages.clone())
+    }
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct Package {
     pub id: String,
     pub version: String,
     pub explicit: bool,
 }
 
+#[derive(Debug, Clone, clap::ValueEnum, Serialize, Deserialize)]
+pub enum Manager {
+    #[cfg(feature = "pacman")]
+    Pacman,
+    #[cfg(feature = "portage")]
+    Portage,
+}
+
+
+impl Manager {
+    pub fn get_manager(manager: Option<Manager>) -> Result<Box<dyn PackageManager>> {
+        #[cfg(not(target_os = "linux"))]
+        {
+            return Err(Error::Unsupported);
+        }
+
+        #[cfg(target_os = "linux")]
+        {
+            if let Some(man) = manager {
+                return Ok(man.to_package_manager());
+            }
+            let mut os_release = File::open("/etc/os-release")?;
+            let mut content = String::new();
+            os_release.read_to_string(&mut content)?;
+
+            let lines: Vec<&str> = content.split('\n').collect();
+            for line in lines {
+                let Some((key, value)) = line.split_once('=') else {
+                    continue;
+                };
+                if key == "ID" {
+                    return Self::from_str(value);
+                }
+            }
+            Err(Error::Unsupported)
+        }
+    }
+
+    fn from_str(value: &str) -> Result<Box<dyn PackageManager>> {
+        Ok(match value {
+            #[cfg(feature = "pacman")]
+            "arch" => Box::new(Pacman),
+            #[cfg(feature = "portage")]
+            "gentoo" => Box::new(Portage),
+            _ => return Err(Error::Unsupported),
+        })
+    }
+
+    fn to_package_manager(&self) -> Box<dyn PackageManager> {
+        match self {
+            #[cfg(feature = "pacman")]
+            Self::Pacman => Box::new(Pacman),
+            #[cfg(feature = "portage")]
+            Self::Portage => Box::new(Portage),
+        }
+    }
+}
+
+
 pub trait PackageManager {
-    fn get_installed(&self) -> Result<Vec<Package>>;
+    fn get_installed(&self) -> Result<PackageList>;
 
     fn install(&self, pkgs: Vec<Package>) -> Result<()>;
 }