From e3c7df868b638f8dbf2423401b2fb72fc0779249 Mon Sep 17 00:00:00 2001
From: Melody Horn <melody@boringcactus.com>
Date: Sun, 4 Apr 2021 14:57:44 -0600
Subject: implement `strip` function

---
 src/makefile/functions.rs | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/src/makefile/functions.rs b/src/makefile/functions.rs
index d746d8a..750d56a 100644
--- a/src/makefile/functions.rs
+++ b/src/makefile/functions.rs
@@ -16,6 +16,10 @@ pub fn expand_call(
     to_eval: Option<Rc<RefCell<Vec<String>>>>,
 ) -> Result<String> {
     match name {
+        "strip" => {
+            assert_eq!(args.len(), 1);
+            text::strip(macros, &args[0])
+        }
         "filter" => {
             assert_eq!(args.len(), 2);
             text::filter(macros, &args[0], &args[1])
@@ -95,6 +99,13 @@ pub fn expand_call(
 mod text {
     use super::*;
 
+    pub fn strip(macros: &MacroSet, text: &TokenString) -> Result<String> {
+        let text = macros.expand(text)?;
+        // TODO don't allocate this vec
+        let words = text.split_whitespace().collect::<Vec<_>>();
+        Ok(words.join(" "))
+    }
+
     pub fn filter(macros: &MacroSet, patterns: &TokenString, text: &TokenString) -> Result<String> {
         let patterns = macros.expand(patterns)?;
         let patterns = patterns.split_whitespace().collect::<Vec<_>>();
-- 
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