Initial SFERA platform baseline

rust/crates/bsl-parser/src/main.rs

@@ -0,0 +1,33 @@
+use std::env;
+use std::fs;
+use std::io::{self, Read};
+
+use bsl_parser::parse_module;
+
+fn main() {
+    let args: Vec<String> = env::args().collect();
+    let source_path = args.get(1).map(String::as_str).unwrap_or("-");
+    let source = match args.get(1) {
+        Some(path) => fs::read_to_string(path).unwrap_or_else(|error| {
+            eprintln!("failed to read {path}: {error}");
+            std::process::exit(2);
+        }),
+        None => {
+            let mut buffer = String::new();
+            io::stdin()
+                .read_to_string(&mut buffer)
+                .unwrap_or_else(|error| {
+                    eprintln!("failed to read stdin: {error}");
+                    std::process::exit(2);
+                });
+            buffer
+        }
+    };
+
+    let unit = parse_module(source_path, &source);
+    serde_json::to_writer_pretty(io::stdout(), &unit).unwrap_or_else(|error| {
+        eprintln!("failed to serialize parse result: {error}");
+        std::process::exit(2);
+    });
+    println!();
+}