From d79f0018d8b0367d388ab4e4243b31b43869f7f0 Mon Sep 17 00:00:00 2001
From: Mykhailo Chalyi <mike@chaliy.name>
Date: Thu, 26 Mar 2026 17:14:27 +0000
Subject: [PATCH] fix(awk): support backslash-newline line continuation
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Backslash immediately before a newline is now treated as line
continuation in awk programs — the two characters are removed and
the physical lines are joined. This is standard POSIX awk behavior.

Closes #836
---
 crates/bashkit/src/builtins/awk.rs            |  4 ++++
 .../bashkit/tests/spec_cases/awk/awk.test.sh  | 21 +++++++++++++++++++
 2 files changed, 25 insertions(+)

diff --git a/crates/bashkit/src/builtins/awk.rs b/crates/bashkit/src/builtins/awk.rs
index f3b08678..30f895b4 100644
--- a/crates/bashkit/src/builtins/awk.rs
+++ b/crates/bashkit/src/builtins/awk.rs
@@ -433,6 +433,10 @@ fn normalize_awk_newlines(input: &str) -> String {
                     i += 1;
                 }
             }
+            '\\' if i + 1 < chars.len() && chars[i + 1] == '\n' => {
+                // Backslash-newline: line continuation — join lines
+                i += 2;
+            }
             '\n' if brace_depth > 0 => {
                 // Inside action block: replace newline with semicolon
                 result.push(';');
diff --git a/crates/bashkit/tests/spec_cases/awk/awk.test.sh b/crates/bashkit/tests/spec_cases/awk/awk.test.sh
index b71fe95d..19cd23c0 100644
--- a/crates/bashkit/tests/spec_cases/awk/awk.test.sh
+++ b/crates/bashkit/tests/spec_cases/awk/awk.test.sh
@@ -724,3 +724,24 @@ echo 'abc' | awk '/abc/ { print "yes" }'
 ### expect
 yes
 ### end
+
+### awk_backslash_newline_continuation
+# Issue #836: backslash-newline line continuation
+echo 'test' | awk '{
+    x = 1 + \
+        2
+    print x
+}'
+### expect
+3
+### end
+
+### awk_backslash_newline_condition
+# Issue #836: backslash-newline in condition
+echo '5' | awk '{
+    if ($1 > 3 && \
+        $1 < 10) print "yes"
+}'
+### expect
+yes
+### end