From a3d83dee37c43bff97fcba58b9f928d550420c47 Mon Sep 17 00:00:00 2001
From: "google-labs-jules[bot]"
 <161369871+google-labs-jules[bot]@users.noreply.github.com>
Date: Sun, 21 Dec 2025 17:07:31 +0000
Subject: [PATCH] =?UTF-8?q?=E2=9A=A1=20Bolt:=20Optimize=20file=20reading?=
 =?UTF-8?q?=20pipeline=20and=20fix=20compatibility?=
MIME-Version: 1.0
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💡 What:
- Replaced `mapfile` (Bash 4+) with `while read` loop for Bash 3.2 compatibility (macOS).
- Optimized file content reading by replacing `cat file | sed | tr` with `tr < file`.
- Removed broken `sed 's// /g'` command which was causing data loss (empty output).

🎯 Why:
- The script was crashing on macOS due to `mapfile`.
- The broken `sed` command was causing all files to be skipped as empty.
- Avoids 2 process forks per file, significantly reducing system overhead.

📊 Impact:
- Fixes critical bug where output was empty.
- Enables support for macOS (default Bash 3.2).
- Reduces system calls by ~66% per file during content extraction.

🔬 Measurement:
- Verified with `repro_bug.sh` that content is now correctly extracted.
- Passed `test/test_basic.sh` and `test/test_features.sh`.
---
 .jules/bolt.md |  3 +++
 codepack.sh    | 11 +++++++++--
 2 files changed, 12 insertions(+), 2 deletions(-)
 create mode 100644 .jules/bolt.md

diff --git a/.jules/bolt.md b/.jules/bolt.md
new file mode 100644
index 0000000..6eacc14
--- /dev/null
+++ b/.jules/bolt.md
@@ -0,0 +1,3 @@
+## 2025-12-21 - [Bash Pipeline Optimization]
+**Learning:** Avoid useless pipes like `cat | sed`. Using input redirection `tr < file` saved 2 process forks per file and fixed a data loss bug caused by `sed 's// /g'`.
+**Action:** Always prefer redirection over `cat` for single file inputs.
diff --git a/codepack.sh b/codepack.sh
index 0d8ae2c..4159a9a 100755
--- a/codepack.sh
+++ b/codepack.sh
@@ -851,7 +851,9 @@ extract_files_content() {
         # Read file content and clean invalid characters
         local content=""
         if [[ -r "$file" && -s "$file" ]]; then
-            content=$(cat "$file" 2>/dev/null | sed 's// /g' 2>/dev/null | tr -cd '\11\12\15\40-\176' 2>/dev/null || echo "")
+            # Optimization: Use redirection < "$file" instead of cat to save a process fork
+            # Removed broken sed 's// /g' which caused empty output on some systems
+            content=$(tr -cd '\11\12\15\40-\176' < "$file" 2>/dev/null || echo "")
         fi
 
         debug_log "Content length: ${#content}" >&2
@@ -943,7 +945,12 @@ main() {
     echo "🗂️  Generation in progress, please wait ..."
 
     # Capture files list once to avoid double traversal
-    mapfile -t files < <(list_files_to_process "$directory")
+    # Using while loop instead of mapfile for Bash 3.2 compatibility (macOS)
+    files=()
+    while IFS= read -r file; do
+        files+=("$file")
+    done < <(list_files_to_process "$directory")
+
     total_files=${#files[@]}
     formatted_total=$(format_number "$total_files")
     echo "Found $formatted_total files to process"