Move rhai-repl and rhai-doc to bin.

src/bin/rhai-run.rs

@@ -0,0 +1,70 @@
+use rhai::{Engine, EvalAltResult, Position};
+
+#[cfg(not(feature = "no_optimize"))]
+use rhai::OptimizationLevel;
+
+use std::{env, fs::File, io::Read, process::exit};
+
+fn eprint_error(input: &str, err: EvalAltResult) {
+    fn eprint_line(lines: &[&str], pos: Position, err: &str) {
+        let line = pos.line().unwrap();
+
+        let line_no = format!("{}: ", line);
+        let pos_text = format!(" ({})", pos);
+
+        eprintln!("{}{}", line_no, lines[line - 1]);
+        eprintln!(
+            "{:>1$} {2}",
+            "^",
+            line_no.len() + pos.position().unwrap(),
+            err.replace(&pos_text, "")
+        );
+        eprintln!("");
+    }
+
+    let lines: Vec<_> = input.split('\n').collect();
+
+    // Print error
+    let pos = err.position();
+
+    if pos.is_none() {
+        // No position
+        eprintln!("{}", err);
+    } else {
+        // Specific position
+        eprint_line(&lines, pos, &err.to_string())
+    }
+}
+
+fn main() {
+    for filename in env::args().skip(1) {
+        let mut engine = Engine::new();
+
+        #[cfg(not(feature = "no_optimize"))]
+        engine.set_optimization_level(OptimizationLevel::Full);
+
+        let mut f = match File::open(&filename) {
+            Err(err) => {
+                eprintln!("Error reading script file: {}\n{}", filename, err);
+                exit(1);
+            }
+            Ok(f) => f,
+        };
+
+        let mut contents = String::new();
+
+        if let Err(err) = f.read_to_string(&mut contents) {
+            eprintln!("Error reading script file: {}\n{}", filename, err);
+            exit(1);
+        }
+
+        if let Err(err) = engine.consume(&contents) {
+            eprintln!("{:=<1$}", "", filename.len());
+            eprintln!("{}", filename);
+            eprintln!("{:=<1$}", "", filename.len());
+            eprintln!("");
+
+            eprint_error(&contents, *err);
+        }
+    }
+}