Implemented cli skeleton

srp_analysis/Cargo.toml

@@ -7,3 +7,4 @@ edition = "2018"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
+structopt = { version = "0.3"}

srp_analysis/src/main.rs

@@ -4,19 +4,54 @@ mod srp_analyser;
 use common::*;
 use srp_analyser::*;
 
+use std::path::PathBuf;
+use structopt::StructOpt;
+
+
+#[derive(Debug, StructOpt)]
+#[structopt(name = "srp_analysis", about = "Preforms srp analysis.")]
+struct Opt {
+    /// Approximate preemptions
+    #[structopt(short, long)]
+    approx: bool,    
+    
+    /// Input file, example input if not present
+    #[structopt(parse(from_os_str))]
+    input: Option<PathBuf>,
+
+    /// Output file, stdout if not present
+    #[structopt(parse(from_os_str))]
+    output: Option<PathBuf>,
+}
 
-fn main() {
-    let tasks: Tasks = create_tasks();
 
-    println!("tasks {:?}", &tasks);
-    println!("tot_util {}", total_load_factor(&tasks));
+fn main() {
 
+    let opt = Opt::from_args();
+    println!("{:?}", opt);
+    
+    let tasks: Tasks = match opt.input {
+        Some(_file) => create_tasks(), // TODO: Implement so that the tasks can be read from file.
+        None => create_tasks(),
+    };
+    
     let (ip, tr) = pre_analysis(&tasks);
-    println!("ip: {:?}", ip);
-    println!("tr: {:?}", tr);
+    let analysis = analyse(&tasks, &ip, &tr, opt.approx);
+
+    match opt.output {
+        Some(_file) => (), // TODO: Implement so that the analysis can be saved to file.
+        None => {
+            println!("tasks {:?}", &tasks);
+            println!("tot_util {}", total_load_factor(&tasks));
+
+            println!("ip: {:?}", ip);
+            println!("tr: {:?}", tr);
 
-    let analysis = analyse(&tasks, &ip, &tr, true);
-    println!("Analysis {:#?}", analysis);
+            println!("Analysis {:#?}", analysis);
+
+            // TODO: Implement a nicer print out to stdout.
+        },
+    };
 }