From b3141319b98199d75f1317ef3754c0b6b14b1f78 Mon Sep 17 00:00:00 2001
From: Bryan Newbold <bnewbold@robocracy.org>
Date: Mon, 25 Oct 2021 00:15:04 -0700
Subject: refactor into lib-style crate, and add some early tests

---
 src/bin/casual.rs | 65 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 65 insertions(+)
 create mode 100644 src/bin/casual.rs

(limited to 'src/bin')

diff --git a/src/bin/casual.rs b/src/bin/casual.rs
new file mode 100644
index 0000000..828c4b6
--- /dev/null
+++ b/src/bin/casual.rs
@@ -0,0 +1,65 @@
+use std::env;
+use std::path::Path;
+
+use casual::{repl, sexpr_parse_file};
+
+fn usage() {
+    println!("usage:\tcasual [-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 file_list = Vec::<String>::new();
+
+    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;
+            }
+            _ => {
+                file_list.push(arg.clone());
+            }
+        }
+    }
+
+    for fname in file_list {
+        let fpath = Path::new(&fname);
+        if !fpath.is_file() {
+            println!("File not found (or not file): {}", fname);
+            return;
+        }
+        println!("Loading {}...", fname);
+        match sexpr_parse_file(&fpath) {
+            Err(e) => {
+                println!("Error loading file: {}\n    {}", fname, e);
+                return;
+            }
+            Ok(_) => (),
+        }
+    }
+
+    if !no_repl {
+        repl(verbose);
+    }
+}
-- 
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