implement `origin`

1 files changed, 14 insertions, 0 deletions

diff --git a/src/makefile/functions.rs b/src/makefile/functions.rs
index bc244cb..a61a0cf 100644
--- a/src/makefile/functions.rs
+++ b/src/makefile/functions.rs
@@ -56,6 +56,11 @@ pub fn expand_call(name: &str, args: &[TokenString], macros: &MacroSet) -> Resul
         // eval
         "eval" => todo!(),
 
+        "origin" => {
+            assert_eq!(args.len(), 1);
+            origin::origin(macros, &args[0])
+        }
+
         // shell
         "shell" => todo!(),
 
@@ -260,6 +265,15 @@ mod call {
     }
 }
 
+mod origin {
+    use super::*;
+
+    pub fn origin(macros: &MacroSet, variable: &TokenString) -> Result<String> {
+        let variable = macros.expand(variable)?;
+        Ok(macros.origin(&variable).to_owned())
+    }
+}
+
 #[cfg(test)]
 mod test {
     use super::*;