Merge pull request #20 from teackot/flatpak-backend

add support for flatpak

README.md

@@ -85,12 +85,13 @@ Note that the name of the section corresponds to the ecosystem it relates to, ra
 At the moment, supported backends are the following.
 Pull requests for additional backends are welcome!
 
-| Application | Package Manager | Section   | feature flag | Notes                                                                                                     |
-|-------------|-----------------|-----------|--------------|-----------------------------------------------------------------------------------------------------------|
-| Arch Linux  | `pacman`        | `[arch]`  | `arch`       | includes pacman-wrapping AUR helpers (configurable)                                                       |
-| Debian      | `apt`           | `[debian]`| `debian`     | minimum supported apt-version unknown ([upstream issue](https://gitlab.com/volian/rust-apt/-/issues/20))  |
-| Python      | `pip`           | `[python]`| built-in     |                                                                                                           |
-| Rust        | `cargo`         | `[rust]`  | built-in     |                                                                                                           |
+| Application | Package Manager | Section     | feature flag | Notes                                                                                                     |
+|-------------|-----------------|-------------|--------------|-----------------------------------------------------------------------------------------------------------|
+| Arch Linux  | `pacman`        | `[arch]`    | `arch`       | includes pacman-wrapping AUR helpers (configurable)                                                       |
+| Debian      | `apt`           | `[debian]`  | `debian`     | minimum supported apt-version unknown ([upstream issue](https://gitlab.com/volian/rust-apt/-/issues/20))  |
+| Flatpak     | `flatpak`       | `[flatpak]` | built-in     | can manage either system-wide or per-user installation (configurable)                                     |
+| Python      | `pip`           | `[python]`  | built-in     |                                                                                                           |
+| Rust        | `cargo`         | `[rust]`    | built-in     |                                                                                                           |
 
 Backends that have a `feature flag` require setting the respective flag for the build process.
 The appropriate system libraries and their header files must be present on the machine and be detectable by `pkg-config`.

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

@@ -0,0 +1,121 @@
+use std::collections::HashSet;
+use std::process::Command;
+use std::process::ExitStatus;
+
+use anyhow::{Context, Result};
+
+use crate::backend::backend_trait::{Backend, Switches, Text};
+use crate::{impl_backend_constants, Group, Package};
+
+#[derive(Debug, Clone)]
+pub struct Flatpak {
+    pub(crate) packages: HashSet<Package>,
+    pub(crate) systemwide: bool,
+}
+
+const BINARY: Text = "flatpak";
+const SECTION: Text = "flatpak";
+
+const SWITCHES_INSTALL: Switches = &["install"];
+const SWITCHES_INFO: Switches = &["info"];
+const SWITCHES_MAKE_DEPENDENCY: Switches = &[];
+const SWITCHES_NOCONFIRM: Switches = &["--assumeyes"];
+const SWITCHES_REMOVE: Switches = &["uninstall"];
+
+const SUPPORTS_AS_DEPENDENCY: bool = false;
+
+impl Backend for Flatpak {
+    impl_backend_constants!();
+
+    fn get_all_installed_packages(&self) -> Result<HashSet<Package>> {
+        self.get_installed_packages(true)
+    }
+
+    fn get_explicitly_installed_packages(&self) -> Result<HashSet<Package>> {
+        self.get_installed_packages(false)
+    }
+
+    /// Install the specified packages.
+    fn install_packages(&self, packages: &[Package], noconfirm: bool) -> Result<ExitStatus> {
+        let mut cmd = Command::new(self.get_binary());
+        cmd.args(self.get_switches_install());
+        cmd.args(self.get_switches_runtime());
+
+        if noconfirm {
+            cmd.args(self.get_switches_noconfirm());
+        }
+
+        for p in packages {
+            cmd.arg(format!("{p}"));
+        }
+
+        cmd.status()
+            .with_context(|| format!("running command {cmd:?}"))
+    }
+
+    fn make_dependency(&self, _: &[Package]) -> Result<ExitStatus> {
+        panic!("not supported by {}", BINARY)
+    }
+
+    /// Remove the specified packages.
+    fn remove_packages(&self, packages: &[Package], noconfirm: bool) -> Result<ExitStatus> {
+        let mut cmd = Command::new(self.get_binary());
+        cmd.args(self.get_switches_remove());
+        cmd.args(self.get_switches_runtime());
+
+        if noconfirm {
+            cmd.args(self.get_switches_noconfirm());
+        }
+
+        for p in packages {
+            cmd.arg(format!("{p}"));
+        }
+
+        cmd.status()
+            .with_context(|| format!("running command [{cmd:?}]"))
+    }
+
+    /// Show information from package manager for package.
+    fn show_package_info(&self, package: &Package) -> Result<ExitStatus> {
+        let mut cmd = Command::new(self.get_binary());
+        cmd.args(self.get_switches_info());
+        cmd.args(self.get_switches_runtime());
+        cmd.arg(format!("{package}"));
+        cmd.status()
+            .with_context(|| format!("running command {cmd:?}"))
+    }
+}
+
+impl Flatpak {
+    pub(crate) fn new() -> Self {
+        Self {
+            packages: HashSet::new(),
+            systemwide: true,
+        }
+    }
+
+    fn get_switches_runtime(&self) -> Switches {
+        if self.systemwide {
+            &[]
+        } else {
+            &["--user"]
+        }
+    }
+
+    fn get_installed_packages(&self, include_implicit: bool) -> Result<HashSet<Package>> {
+        let mut cmd = Command::new(BINARY);
+        cmd.args(["list", "--columns=application"]);
+        if !include_implicit {
+            cmd.arg("--app");
+        }
+        if !self.systemwide {
+            cmd.arg("--user");
+        }
+
+        let output = String::from_utf8(cmd.output()?.stdout)?;
+        Ok(output
+            .lines()
+            .map(Package::from)
+            .collect::<HashSet<Package>>())
+    }
+}

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

@@ -2,5 +2,6 @@
 pub mod arch;
 #[cfg(feature = "debian")]
 pub mod debian;
+pub mod flatpak;
 pub mod python;
 pub mod rust;

crates/pacdef_core/src/backend/backend_trait.rs

@@ -177,7 +177,7 @@ where
     let mut map = HashMap::new();
 
     for (value, key) in to_assign {
-        let inner = map.entry(key).or_insert(vec![]);
+        let inner: &mut Vec<V> = map.entry(key).or_default();
         inner.push(value);
     }
 

crates/pacdef_core/src/backend/mod.rs

@@ -16,6 +16,7 @@ pub enum Backends {
     Arch,
     #[cfg(feature = "debian")]
     Debian,
+    Flatpak,
     Python,
     Rust,
 }

crates/pacdef_core/src/config.rs

@@ -13,6 +13,8 @@ pub struct Config {
     pub aur_helper: String,
     /// Additional arguments to pass to `aur_helper` when removing a package.
     pub aur_rm_args: Option<Vec<String>>,
+    /// Install Flatpak packages system-wide
+    pub flatpak_systemwide: bool,
     /// Warn the user when a group is not a symlink.
     pub warn_not_symlinks: bool,
     /// Backends the user does not want to use even though the binary exists.
@@ -68,6 +70,7 @@ impl Default for Config {
         Self {
             aur_helper: "paru".into(),
             aur_rm_args: None,
+            flatpak_systemwide: true,
             warn_not_symlinks: true,
             disabled_backends: vec![],
         }

crates/pacdef_core/src/core.rs

@@ -128,6 +128,13 @@ impl Pacdef {
                 arch.aur_rm_args = self.config.aur_rm_args.take();
             }
         }
+
+        if let Some(flatpak) = backend
+            .as_any_mut()
+            .downcast_mut::<crate::backend::Flatpak>()
+        {
+            flatpak.systemwide = self.config.flatpak_systemwide;
+        }
     }
 
     fn install_packages(&mut self, args: &ArgMatches) -> Result<()> {