Various additions and improvements

src/builtin/export.rs

@@ -0,0 +1,32 @@
+use crate::{jobs::{ChildProc, JobBldr}, libsh::error::{ShErr, ShErrKind, ShResult}, parse::{execute::prepare_argv, NdRule, Node}, prelude::*};
+
+pub fn export(node: Node, job: &mut JobBldr) -> ShResult<()> {
+	let NdRule::Command { assignments: _, argv } = node.class else {
+		unreachable!()
+	};
+
+	let child_pgid = if let Some(pgid) = job.pgid() {
+		pgid
+	} else {
+		job.set_pgid(Pid::this());
+		Pid::this()
+	};
+	let child = ChildProc::new(Pid::this(), Some("export"), Some(child_pgid))?;
+	job.push_child(child);
+
+	let argv = prepare_argv(argv);
+
+	for (arg,span) in argv {
+		let Some((var,val)) = arg.split_once('=') else {
+			return Err(
+				ShErr::full(
+					ShErrKind::ExecFail,
+					"Expected an assignment in export args",
+					span.into()
+				)
+			)
+		};
+		env::set_var(var, val);
+	}
+	Ok(())
+}