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authorbnewbold <bnewbold@robocracy.org>2016-04-25 18:55:44 -0400
committerbnewbold <bnewbold@robocracy.org>2016-04-25 18:55:44 -0400
commit6880d8194a03152fdb293565000efa7149aa0929 (patch)
tree57267056dbf8f5ae9083e0ea2003f0894a294b2d
parentf3a7991a23253533818fa25a1b7012d4656eee0c (diff)
downloadspectrum-6880d8194a03152fdb293565000efa7149aa0929.zip
spectrum-6880d8194a03152fdb293565000efa7149aa0929.tar.gz
rust: add proper file parsing and basic command line args
-rw-r--r--rust/spectrum.rs45
1 files changed, 42 insertions, 3 deletions
diff --git a/rust/spectrum.rs b/rust/spectrum.rs
index 3ab07b0..b61e3ad 100644
--- a/rust/spectrum.rs
+++ b/rust/spectrum.rs
@@ -7,7 +7,7 @@
* Intentended to work with Rust 1.8 (stable from Spring 2016)
*/
-use std::io;
+use std::{io, env};
use std::io::{Write, Read};
use std::fs::File;
use std::path::Path;
@@ -728,14 +728,53 @@ fn import_file(fpath: &Path, top_env: &mut HashMap<String, SchemeExpr>) -> Resul
Ok(())
}
+fn usage() {
+ println!("usage:\tspectrum [-h] [-v] [--no-repl] [<files>]");
+ println!("");
+ println!("Files will be loaded in order, then drop to REPL (unless \"--no-repl\" is passed).");
+ println!("Verbose flag (\"-v\") will result in lexed tokens and parsed AST being dumped to stdout (when on REPL)");
+}
+
fn main() {
+ let mut verbose: bool = false;
+ let mut no_repl: bool = false;
let mut top_env = HashMap::<String, SchemeExpr>::new();
let prelude_path = Path::new("../prelude.scm");
import_file(&prelude_path, &mut top_env).unwrap();
- // For now only REPL mode is implemented
- repl(true, &mut top_env);
+ for arg in env::args().skip(1) {
+ match &*arg {
+ "-v" | "--verbose" => { verbose = true; },
+ "--no-repl" => { no_repl = true; },
+ "-h" | "--help" => { usage(); return; },
+ _ if arg.starts_with("-") => {
+ println!("Unknown option: {}", arg);
+ println!("");
+ usage();
+ return;
+ },
+ _ => {
+ let arg_path = Path::new(&arg);
+ println!("Loading {}...", arg);
+ if !arg_path.is_file() {
+ println!("File not found (or not file): {}", arg);
+ return;
+ }
+ match import_file(&arg_path, &mut top_env) {
+ Err(e) => {
+ println!("Error loading file: {}\n {}", arg, e);
+ return;
+ },
+ Ok(_) => ()
+ }
+ }
+ }
+ }
+
+ if !no_repl {
+ repl(verbose, &mut top_env);
+ }
}