1 files changed, 20 insertions, 0 deletions
diff --git a/src/parse/mod.rs b/src/parse/mod.rs
index 5059311..6ce3133 100644
--- a/src/parse/mod.rs
+++ b/src/parse/mod.rs
@@ -551,6 +551,11 @@ impl StringPart {
     pub fn is_boring(&self) -> bool {
         matches!(self, StringPart::Boring(..))
     }
+
+    pub fn is_command(&self) -> bool {
+        matches!(self, StringPart::Cmd(..))
+    }
+
     pub fn unwrap_boring(self) -> BString {
         match self {
             StringPart::Boring(items) => items,
@@ -588,6 +593,21 @@ impl ExpString {
         }
         Ok(out)
     }
+
+    pub fn has_commands(&self) -> bool {
+        self.parts.iter().any(|part| part.is_command())
+    }
+
+    /// vars that are directly mentioned in this string interpolation, i.e. does not look into commands
+    pub fn vars(&self) -> Vec<BString> {
+        self.parts
+            .iter()
+            .filter_map(|part| match part {
+                StringPart::Var(var) => Some(var.name.name.clone()),
+                _ => None,
+            })
+            .collect()
+    }
 }
 
 fn is_symbol(x: u8) -> bool {