check if backends are installed using pure rust

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "rwpspread"
-version = "0.2.2-1"
+version = "0.2.3-1"
 edition = "2021"
 authors = ["0xk1f0"]
 description = "Multi-Monitor Wallpaper Utility"

man/rwpspread.1

@@ -1,6 +1,6 @@
 .ie \n(.g .ds Aq \(aq
 .el .ds Aq '
-.TH rwpspread 1  "rwpspread 0.2.2-1" 
+.TH rwpspread 1  "rwpspread 0.2.3-1" 
 .SH NAME
 rwpspread \- Multi\-Monitor Wallpaper Utility
 .SH SYNOPSIS
@@ -50,4 +50,4 @@ Print help
 \fB\-V\fR, \fB\-\-version\fR
 Print version
 .SH VERSION
-v0.2.2\-1
+v0.2.3\-1

src/integrations/helpers.rs

@@ -1,4 +1,4 @@
-use std::process;
+use std::{process,env};
 
 // force restart a program
 pub fn force_restart(program: &str, arguments: Vec<&str>) -> Result<(), String> {
@@ -52,15 +52,15 @@ pub fn soft_restart(program: &str, arguments: Vec<&str>) -> Result<(), String> {
     Ok(())
 }
 
-// check if a program is available using which
+// check if a program is available
 pub fn is_installed(program: &str) -> bool {
-    match process::Command::new("which")
-        .arg(program)
-        .stdout(process::Stdio::null())
-        .stderr(process::Stdio::null())
-        .status()
-    {
-        Ok(status) => status.success(),
-        Err(_) => false,
+    if let Some(path) = env::var_os("PATH") {
+        for path in env::split_paths(&path) {
+            let full_path = path.join(program);
+            if full_path.exists() {
+                return true;
+            }
+        }
     }
+    false
 }