From f326eef2c9c827935a27de16748abe5e253b9979 Mon Sep 17 00:00:00 2001
From: Melody Horn <melody@boringcactus.com>
Date: Sun, 4 Apr 2021 11:57:50 -0600
Subject: force patterns to match full text

---
 src/makefile/pattern.rs | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

(limited to 'src')

diff --git a/src/makefile/pattern.rs b/src/makefile/pattern.rs
index b47c75d..9c5a0fa 100644
--- a/src/makefile/pattern.rs
+++ b/src/makefile/pattern.rs
@@ -2,7 +2,7 @@ use eyre::Result;
 use regex::{Captures, Regex};
 
 fn compile_pattern(pattern: &str) -> Result<Regex> {
-    let mut result = String::new();
+    let mut result = "^".to_owned();
     for c in pattern.chars() {
         if c == '%' {
             if let Some(real_result) = result.strip_suffix(r"\\\\") {
@@ -22,6 +22,7 @@ fn compile_pattern(pattern: &str) -> Result<Regex> {
             result.push_str(&regex::escape(&c.to_string()));
         }
     }
+    result.push('$');
     Ok(Regex::new(&result)?)
 }
 
@@ -38,10 +39,10 @@ mod test {
     #[test]
     fn pattern_backslashes() -> R {
         let test_case = compile_pattern(r"the\%weird\\%pattern\\")?;
-        assert_eq!(test_case.to_string(), r"the%weird\\(\w*)pattern\\\\");
+        assert_eq!(test_case.to_string(), r"^the%weird\\(.*)pattern\\\\$");
 
         let hell = compile_pattern(r"\\\\%")?;
-        assert_eq!(hell.to_string(), r"\\\\\\(\w*)");
+        assert_eq!(hell.to_string(), r"^\\\\\\(.*)$");
         Ok(())
     }
 }
-- 
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