Add support for apk package manager to packages block

Resolves: #2212

Author: remko

cspell.yaml

@@ -22,6 +22,7 @@ words:
   - amixer
   - apcupsd
   - aplay
+  - apk
   - armv
   - arphrd
   - backon

src/blocks/packages.rs

@@ -6,6 +6,7 @@
 //! - `aur` for Arch based system
 //! - `dnf` for Fedora based system
 //! - `xbps` for Void Linux
+//! - `apk` for Alpine Linux
 //!
 //! # Configuration
 //!
@@ -30,6 +31,7 @@
 //! `aur`        | Number of updates available in Arch based system                                 | Number | -
 //! `dnf`        | Number of updates available in Fedora based system                               | Number | -
 //! `xbps`       | Number of updates available in Void Linux                                        | Number | -
+//! `apk`        | Number of updates available in Alpine Linux                                      | Number | -
 //! `total`      | Number of updates available in all package manager listed                        | Number | -
 //!
 //! # Apt
@@ -174,18 +176,37 @@
 //! cmd = "xbps-install -Mun | dmenu -l 10"
 //! ```
 //!
+//!
+//! Apk only config:
+//!
+//! ```toml
+//! [[block]]
+//! block = "packages"
+//! package_manager = ["apk"]
+//! interval = 1800
+//! error_interval = 300
+//! max_retries = 5
+//! format = " $icon $apk.eng(w:1) updates available "
+//! format_singular = " $icon One update available "
+//! format_up_to_date = " $icon system up to date "
+//! [[block.click]]
+//! # shows dmenu with available updates. Any dmenu alternative should also work.
+//! button = "left"
+//! cmd = "apk --no-cache --upgradable list | dmenu -l 10"
+//! ```
+//!
 //! Multiple package managers config:
 //!
 //! Update the list of pending updates every thirty minutes (1800 seconds):
 //!
 //! ```toml
 //! [[block]]
 //! block = "packages"
-//! package_manager = ["apt", "pacman", "aur", "dnf", "xbps"]
+//! package_manager = ["apt", "pacman", "aur", "dnf", "xbps", "apk"]
 //! interval = 1800
 //! error_interval = 300
 //! max_retries = 5
-//! format = " $icon $apt + $pacman + $aur + $dnf + $xbps = $total updates available "
+//! format = " $icon $apt + $pacman + $aur + $dnf + $xbps + $apk = $total updates available "
 //! format_singular = " $icon One update available "
 //! format_up_to_date = " $icon system up to date "
 //! # If a linux update is available, but no ZFS package, it won't be possible to
@@ -212,6 +233,9 @@ use dnf::Dnf;
 pub mod xbps;
 use xbps::Xbps;
 
+pub mod apk;
+use apk::Apk;
+
 use regex::Regex;
 
 use super::prelude::*;
@@ -240,6 +264,7 @@ pub enum PackageManager {
     Aur,
     Dnf,
     Xbps,
+    Apk,
 }
 
 pub async fn run(config: &Config, api: &CommonApi) -> Result<()> {
@@ -267,6 +292,7 @@ pub async fn run(config: &Config, api: &CommonApi) -> Result<()> {
     let pacman = any_format_contains!("pacman");
     let dnf = any_format_contains!("dnf");
     let xbps = any_format_contains!("xbps");
+    let apk = any_format_contains!("apk");
 
     if !config.package_manager.contains(&PackageManager::Apt) && apt {
         config.package_manager.push(PackageManager::Apt);
@@ -283,6 +309,9 @@ pub async fn run(config: &Config, api: &CommonApi) -> Result<()> {
     if !config.package_manager.contains(&PackageManager::Xbps) && xbps {
         config.package_manager.push(PackageManager::Xbps);
     }
+    if !config.package_manager.contains(&PackageManager::Apk) && apk {
+        config.package_manager.push(PackageManager::Apk);
+    }
 
     let warning_updates_regex = config
         .warning_updates_regex
@@ -314,6 +343,7 @@ pub async fn run(config: &Config, api: &CommonApi) -> Result<()> {
             )),
             PackageManager::Dnf => Box::new(Dnf::new()),
             PackageManager::Xbps => Box::new(Xbps::new()),
+            PackageManager::Apk => Box::new(Apk::new()),
         });
     }
 

src/blocks/packages/apk.rs

@@ -0,0 +1,38 @@
+use tokio::process::Command;
+
+use super::*;
+
+#[derive(Default)]
+pub struct Apk;
+
+impl Apk {
+    pub fn new() -> Self {
+        Default::default()
+    }
+}
+
+#[async_trait]
+impl Backend for Apk {
+    fn name(&self) -> Cow<'static, str> {
+        "apk".into()
+    }
+
+    async fn get_updates_list(&self) -> Result<Vec<String>> {
+        let stdout = Command::new("apk")
+            .env("LC_LANG", "C")
+            .args(["--no-cache", "-q", "list", "--upgradable"])
+            .output()
+            .await
+            .error("Problem running apk command")?
+            .stdout;
+
+        let updates = String::from_utf8(stdout).expect("apk produced non-UTF8 output");
+        let updates_list: Vec<String> = updates
+            .lines()
+            .filter(|line| line.len() > 1)
+            .map(|line| line.to_string())
+            .collect();
+
+        Ok(updates_list)
+    }
+}