Refactor main.rs

main.rs controls options, calls into interactive or non-interactive
start function from schala-repl.

Cargo.lock

@@ -821,6 +821,7 @@ checksum = "c92464b447c0ee8c4fb3824ecc8383b81717b9f1e74ba2e72540aef7b9f82997"
 name = "schala"
 version = "0.1.0"
 dependencies = [
+ "getopts",
  "includedir_codegen",
  "schala-lang",
  "schala-repl",
@@ -857,7 +858,6 @@ name = "schala-repl"
 version = "0.1.0"
 dependencies = [
  "colored",
- "getopts",
  "includedir",
  "includedir_codegen",
  "itertools",

Cargo.toml

@@ -6,6 +6,7 @@ edition = "2018"
 resolver = "2"
 
 [dependencies]
+getopts = "0.2.21"
 
 schala-repl = { path = "schala-repl" }
 schala-lang = { path = "schala-lang/language" }

schala-repl/Cargo.toml

@@ -9,7 +9,6 @@ resolver = "2"
 llvm-sys = "70.0.2"
 take_mut = "0.2.2"
 itertools = "0.10"
-getopts = "0.2.18"
 lazy_static = "0.2.8"
 maplit = "*"
 colored = "1.8"

schala-repl/src/lib.rs

@@ -1,7 +1,6 @@
 #![feature(box_patterns, box_syntax, proc_macro_hygiene, decl_macro)]
 #![feature(plugin)]
 extern crate colored;
-extern crate getopts;
 extern crate itertools;
 extern crate linefeed;
 
@@ -29,30 +28,12 @@ include!(concat!(env!("OUT_DIR"), "/static.rs"));
 const VERSION_STRING: &'static str = "0.1.0";
 
 pub fn start_repl(langs: Vec<Box<dyn ProgrammingLanguageInterface>>) {
-    let options = command_line_options()
-        .parse(std::env::args())
-        .unwrap_or_else(|e| {
-            println!("{:?}", e);
-            exit(1);
-        });
-
-    if options.opt_present("help") {
-        println!("{}", command_line_options().usage("Schala metainterpreter"));
-        exit(0);
-    }
-
-    match options.free[..] {
-        [] | [_] => {
   let mut repl = repl::Repl::new(langs);
   repl.run_repl();
 }
-        [_, ref filename, ..] => {
-            run_noninteractive(filename, langs);
-        }
-    };
-}
 
-fn run_noninteractive(filename: &str, languages: Vec<Box<dyn ProgrammingLanguageInterface>>) {
+//TODO should really expect a list of paths
+pub fn run_noninteractive(filename: &str, languages: Vec<Box<dyn ProgrammingLanguageInterface>>) {
     let path = Path::new(filename);
     let ext = path
         .extension()
@@ -87,9 +68,3 @@ fn run_noninteractive(filename: &str, languages: Vec<Box<dyn ProgrammingLanguage
     };
 }
 
-fn command_line_options() -> getopts::Options {
-    let mut options = getopts::Options::new();
-    options.optflag("h", "help", "Show help text");
-    options.optflag("w", "webapp", "Start up web interpreter");
-    options
-}

src/main.rs

@@ -1,9 +1,34 @@
-use schala_repl::{ProgrammingLanguageInterface, start_repl};
+use schala_repl::{run_noninteractive, start_repl, ProgrammingLanguageInterface};
 
-extern { }
+use std::process::exit;
 
 fn main() {
-  let langs: Vec<Box<dyn ProgrammingLanguageInterface>> = vec![Box::new(schala_lang::Schala::new())];
-  start_repl(langs);
+    let args: Vec<String> = std::env::args().collect();
+    let matches = command_line_options()
+        .parse(&args[1..])
+        .unwrap_or_else(|e| {
+            eprintln!("Error parsing options: {}", e);
+            exit(1);
+        });
+
+    if matches.opt_present("help") {
+        println!("{}", command_line_options().usage("Schala metainterpreter"));
+        exit(0);
     }
 
+    let langs: Vec<Box<dyn ProgrammingLanguageInterface>> =
+        vec![Box::new(schala_lang::Schala::new())];
+
+    if matches.free.is_empty() {
+        start_repl(langs);
+    } else {
+        run_noninteractive(&matches.free[0], langs);
+    }
+}
+
+fn command_line_options() -> getopts::Options {
+    let mut options = getopts::Options::new();
+    options.optflag("h", "help", "Show help text");
+    options.optflag("w", "webapp", "Start up web interpreter");
+    options
+}