Initial commit for fern

src/builtin/read.rs

@@ -0,0 +1,39 @@
+use crate::prelude::*;
+
+pub fn read_builtin(node: Node, shenv: &mut ShEnv) -> ShResult<()> {
+	let rule = node.into_rule();
+	if let NdRule::Command { argv, redirs: _ } = rule {
+		let argv = argv.drop_first();
+		let mut argv_iter = argv.iter();
+		// TODO: properly implement redirections
+		// using activate_redirs() was causing issues, may require manual handling
+
+		let mut buf = vec![0u8; 1024];
+		let bytes_read = read(0, &mut buf)?;
+		buf.truncate(bytes_read);
+
+		let read_input = String::from_utf8_lossy(&buf).trim_end().to_string();
+
+		if let Some(var) = argv_iter.next() {
+			/*
+			let words: Vec<&str> = read_input.split_whitespace().collect();
+
+			for (var, value) in argv_iter.zip(words.iter().chain(std::iter::repeat(&""))) {
+				shenv.vars_mut().set_var(&var.to_string(), value);
+			}
+
+			// Assign the rest of the string to the first variable if there's only one
+			if argv.len() == 1 {
+				shenv.vars_mut().set_var(&first_var.to_string(), &read_input);
+			}
+			*/
+			shenv.vars_mut().set_var(&var.to_string(), &read_input);
+		}
+	} else {
+		unreachable!()
+	}
+
+	log!(TRACE, "leaving read");
+	shenv.set_code(0);
+	Ok(())
+}