Implemented subshells and improved error handling

src/tests/error.rs

@@ -10,6 +10,58 @@ fn cmd_not_found() {
 	insta::assert_snapshot!(err_fmt)
 }
 
+#[test]
+fn unclosed_subsh() {
+	let input = "(foo";
+	let token = LexStream::new(Arc::new(input.into()), LexFlags::empty()).skip(1).next().unwrap();
+	let Err(err) = token else {
+		panic!("{:?}",token);
+	};
+
+	let err_fmt = format!("{err}");
+	insta::assert_snapshot!(err_fmt)
+}
+
+#[test]
+fn unclosed_dquote() {
+	let input = "\"foo bar";
+	let token = LexStream::new(Arc::new(input.into()), LexFlags::empty()).skip(1).next().unwrap();
+	let Err(err) = token else {
+		panic!();
+	};
+
+	let err_fmt = format!("{err}");
+	insta::assert_snapshot!(err_fmt)
+}
+
+#[test]
+fn unclosed_squote() {
+	let input = "'foo bar";
+	let token = LexStream::new(Arc::new(input.into()), LexFlags::empty()).skip(1).next().unwrap();
+	let Err(err) = token else {
+		panic!();
+	};
+
+	let err_fmt = format!("{err}");
+	insta::assert_snapshot!(err_fmt)
+}
+
+#[test]
+fn unclosed_brc_grp() {
+	let input = "{ foo bar";
+	let tokens = LexStream::new(Arc::new(input.into()), LexFlags::empty())
+		.map(|tk| tk.unwrap())
+		.collect::<Vec<_>>();
+
+	let node = ParseStream::new(tokens).next().unwrap();
+	let Err(err) = node else {
+		panic!();
+	};
+
+	let err_fmt = format!("{err}");
+	insta::assert_snapshot!(err_fmt)
+}
+
 #[test]
 fn if_no_fi() {
 	let input = "if foo; then bar;";

src/tests/expand.rs

@@ -5,7 +5,7 @@ use super::*;
 #[test]
 fn simple_expansion() {
 	let varsub = "$foo";
-	write_vars(|v| v.set_var("foo", "this is the value of the variable".into()));
+	write_vars(|v| v.set_var("foo", "this is the value of the variable".into(), false));
 
 	let mut tokens: Vec<Tk> = LexStream::new(Arc::new(varsub.to_string()), LexFlags::empty())
 		.map(|tk| tk.unwrap())
@@ -14,7 +14,7 @@ fn simple_expansion() {
 	let var_tk = tokens.pop().unwrap();
 
 	let var_span = var_tk.span.clone();
-	let exp_tk = var_tk.expand(var_span, TkFlags::empty()).unwrap();
+	let exp_tk = var_tk.expand().unwrap();
 	write_vars(|v| v.vars_mut().clear());
 	insta::assert_debug_snapshot!(exp_tk.get_words())
 }

src/tests/snapshots/fern__tests__error__case_no_in.snap

@@ -6,5 +6,5 @@ expression: err_fmt
   -> [1;1]
   |
 1 | case foo foo) bar;; bar) foo;; esac
-  | ^^^^^^^^^^^^^^^^^^^^
+  | ^^^^^^^^^^^^^^^^^^^
   |

src/tests/snapshots/fern__tests__error__if_no_then.snap

@@ -6,5 +6,5 @@ expression: err_fmt
   -> [1;1]
   |
 1 | if foo; bar; fi
-  | ^^^^^^^^^^^^^
+  | ^^^^^^^^^^^^
   |

src/tests/snapshots/fern__tests__error__loop_no_do.snap

@@ -6,5 +6,5 @@ expression: err_fmt
   -> [1;1]
   |
 1 | while true; echo foo; done
-  | ^^^^^^^^^^^^^^^^^^^^^^
+  | ^^^^^^^^^^^^^^^^^^^^^
   |

src/tests/snapshots/fern__tests__error__unclosed_brc_grp.snap

@@ -0,0 +1,10 @@
+---
+source: src/tests/error.rs
+expression: err_fmt
+---
+Parse Error - Expected a closing brace for this brace group
+  -> [1;1]
+  |
+1 | { foo bar
+  | ^^^^^^^^^
+  |

src/tests/snapshots/fern__tests__error__unclosed_dquote.snap

@@ -0,0 +1,10 @@
+---
+source: src/tests/error.rs
+expression: err_fmt
+---
+Parse Error - Unterminated quote
+  -> [1;1]
+  |
+1 | "foo bar
+  | ^^^^^^^^
+  |

src/tests/snapshots/fern__tests__error__unclosed_squote.snap

@@ -0,0 +1,10 @@
+---
+source: src/tests/error.rs
+expression: err_fmt
+---
+Parse Error - Unterminated quote
+  -> [1;1]
+  |
+1 | 'foo bar
+  | ^^^^^^^^
+  |

src/tests/snapshots/fern__tests__error__unclosed_subsh.snap

@@ -0,0 +1,10 @@
+---
+source: src/tests/error.rs
+expression: err_fmt
+---
+Parse Error - Unclosed subshell
+  -> [1;1]
+  |
+1 | (foo
+  | ^
+  |