feat: default package manager

README.md

@@ -113,6 +113,7 @@ Please follow the instruction for your shell:
 > - `_PR_PACKAGE_MANAGER`: Use defined package manager instead of
 > auto-detecting alphabetically. Empty value disables package search
 > functionality
+> 	- `_DEF_PR_PACKAGE_MANAGER`: compile-time value
 
 > You can specify different modes to run with `_PR_MODE`:
 >

core/src/args.rs

@@ -79,6 +79,10 @@ fn print_version() {
 	if lib.is_some() {
 		println!("Default lib directory: {}", lib.unwrap());
 	}
+	let package_manager = option_env!("_DEF_PR_PACKAGE_MANAGER").map(|dir| dir.to_string());
+	if package_manager.is_some() {
+		println!("Default package manager: {}", package_manager.unwrap());
+	}
 }
 
 #[cfg(test)]

core/src/modes.rs

@@ -1,6 +1,6 @@
-use std::path::Path;
 use colored::Colorize;
 use inquire::*;
+use std::path::Path;
 use ui::Color;
 
 use pay_respects_utils::evals::best_matches_path;

core/src/system.rs

@@ -13,6 +13,13 @@ pub fn get_package_manager(data: &mut Data) -> Option<String> {
 		return Some(package_manager);
 	}
 
+	if let Some(package_manager) = option_env!("_DEF_PR_PACKAGE_MANAGER") {
+		if package_manager.is_empty() {
+			return None;
+		}
+		return Some(package_manager.to_string());
+	}
+
 	for package_manager in &[
 		"apt", "dnf", "emerge", "guix", "nix", "pacman", "yum",
 		// "zypper",