add debian backend

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

@@ -0,0 +1,67 @@
+use std::collections::HashSet;
+use std::process::Command;
+use std::process::ExitStatus;
+
+use anyhow::{Context, Result};
+use rust_apt::cache::PackageSort;
+use rust_apt::new_cache;
+
+use crate::backend::backend_trait::{Backend, Switches, Text};
+use crate::{impl_backend_constants, Group, Package};
+
+#[derive(Debug, Clone)]
+pub struct Debian {
+    pub(crate) packages: HashSet<Package>,
+}
+
+const BINARY: Text = "apt";
+const SECTION: Text = "debian";
+
+const SWITCHES_INFO: Switches = &["show"];
+const SWITCHES_INSTALL: Switches = &["install"];
+const SWITCHES_MAKE_DEPENDENCY: Switches = &[]; // not needed
+const SWITCHES_REMOVE: Switches = &["remove"];
+
+impl Backend for Debian {
+    impl_backend_constants!();
+
+    fn get_all_installed_packages(&self) -> Result<HashSet<Package>> {
+        let cache = new_cache!()?;
+        let sort = PackageSort::default().installed();
+
+        let mut result = HashSet::new();
+        for pkg in cache.packages(&sort) {
+            result.insert(Package::from(pkg.name().to_string()));
+        }
+        Ok(result)
+    }
+
+    fn get_explicitly_installed_packages(&self) -> Result<HashSet<Package>> {
+        let cache = new_cache!()?;
+        let sort = PackageSort::default().installed().manually_installed();
+
+        let mut result = HashSet::new();
+        for pkg in cache.packages(&sort) {
+            result.insert(Package::from(pkg.name().to_string()));
+        }
+        Ok(result)
+    }
+
+    fn make_dependency(&self, packages: &[Package]) -> Result<ExitStatus> {
+        let mut cmd = Command::new("apt-mark");
+        cmd.arg("auto");
+        for p in packages {
+            cmd.arg(format!("{p}"));
+        }
+        cmd.status()
+            .with_context(|| format!("running command [{cmd:?}]"))
+    }
+}
+
+impl Debian {
+    pub(crate) fn new() -> Self {
+        Self {
+            packages: HashSet::new(),
+        }
+    }
+}

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

@@ -1,3 +1,5 @@
 #[cfg(feature = "arch")]
 pub mod arch;
+#[cfg(feature = "debian")]
+pub mod debian;
 pub mod rust;

crates/pacdef_core/src/backend/mod.rs

@@ -14,5 +14,7 @@ use pacdef_macros::Register;
 pub enum Backends {
     #[cfg(feature = "arch")]
     Arch,
+    #[cfg(feature = "debian")]
+    Debian,
     Rust,
 }