Added a dirty implementation of env var setting

src/lib.rs

@@ -1,5 +1,6 @@
 #[allow(unused_must_use)]
 pub mod shell {
+    use regex::Regex;
     use std::io::Stdout;
     use std::process::Command;
     use std::io::stdin;
@@ -412,6 +413,7 @@ pub mod shell {
                     aliases: HashMap::new(),
                     hotkeys: HashMap::new(),
                     init: String::new(),
+                    env: HashMap::new(),
                 };
                 let ret_line = format!("Could not build conf, got {}\
                                        \r\nUsing default promptline",  e);
@@ -636,6 +638,38 @@ pub mod shell {
         };
     }
 
+    //I smell horrible code in here
+    fn set_envvars(conf: &SqishConf) {
+        let vars = conf.env.clone();
+        let re = Regex::new(r"\$[A-Za-z_]+").unwrap();
+
+        for (key, value) in vars {
+            let mut after = value.clone();
+            let mut nbr_of_vars = *&value.matches('$').count();
+            while nbr_of_vars >= 1 {
+                let temp = after.clone();
+                let caps = re.captures(&temp).unwrap();
+                for cap in caps.iter() {
+                    match cap {
+                        Some(c) => {
+                            let myvar = String::from(c.as_str()).replace('$', "");
+                            match env::var(myvar) {
+                                Ok(r) => {
+                                    *&mut after = after.replace(c.as_str(), &r);
+                                },
+                                Err(_) => continue,
+                            };
+                        },
+                        None => continue,
+                    };
+                }
+                nbr_of_vars -= 1;
+            }
+            env::set_var(&key, &after);
+        }
+    }
+
+
     //THE ENTRYPOINT FUNCTION
     pub fn run_raw() {
 
@@ -658,6 +692,7 @@ pub mod shell {
         //Initializing
         write!(elems.stdout, "\r\n ---Sqish initializing--- \r\n{}", elems.conf.promptline);
         elems.stdout.flush();
+        set_envvars(&elems.conf);
 
         if elems.conf.init != String::from("") {
             run_cmd(&mut String::from(&elems.conf.init), &mut elems.current_number, &mut elems.conf, &mut elems.stdout);