Various improvements

src/builtin/mod.rs

@@ -6,8 +6,9 @@ pub mod jobctl;
 pub mod read;
 pub mod alias;
 pub mod control_flow;
+pub mod source;
 
-pub const BUILTINS: [&str;13] = [
+pub const BUILTINS: [&str;14] = [
 	"echo",
 	"cd",
 	"pwd",
@@ -21,4 +22,5 @@ pub const BUILTINS: [&str;13] = [
 	"continue",
 	"return",
 	"break",
+	"source",
 ];

src/builtin/source.rs

@@ -0,0 +1,15 @@
+use crate::prelude::*;
+
+pub fn source(node: Node, shenv: &mut ShEnv) -> ShResult<()> {
+	let rule = node.into_rule();
+	if let NdRule::Command { argv, redirs } = rule {
+		shenv.collect_redirs(redirs);
+		let mut argv_iter = argv.into_iter().skip(1);
+		while let Some(arg) = argv_iter.next() {
+			let arg_raw = arg.as_raw(shenv);
+			let arg_path = PathBuf::from(arg_raw);
+			shenv.source_file(arg_path)?;
+		}
+	} else { unreachable!() }
+	Ok(())
+}