From cb3599a312ff7e67eea0f87369a4de12894b211d Mon Sep 17 00:00:00 2001
From: David Chin <david.w.h.chin@gmail.com>
Date: Tue, 27 Jul 2021 17:21:59 -0400
Subject: [PATCH 1/2] lib/grep: Avoid alias expansions on the first argument of
 grep (Fix #229)

---
 lib/grep.sh | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/grep.sh b/lib/grep.sh
index 5aa8a21..4f16819 100644
--- a/lib/grep.sh
+++ b/lib/grep.sh
@@ -21,7 +21,9 @@ elif grep_flag_available --exclude=.cvs; then
 fi
 
 # export grep settings
-alias grep="grep ${GREP_OPTIONS[*]}"
+if ((${#GREP_OPTIONS[@]} > 0)); then
+  alias grep="grep ${GREP_OPTIONS[*]}"
+fi
 
 # clean up
 unset GREP_OPTIONS

From 9b240245bba9901f511da1e4d38529c7436a73d2 Mon Sep 17 00:00:00 2001
From: Koichi Murase <myoga.murase@gmail.com>
Date: Sun, 2 Jan 2022 00:25:30 +0900
Subject: [PATCH 2/2] lib/grep: Refactor variable and function names to avoid
 conflicts

---
 lib/grep.sh | 31 ++++++++++++++++---------------
 1 file changed, 16 insertions(+), 15 deletions(-)

diff --git a/lib/grep.sh b/lib/grep.sh
index 4f16819..4a5f006 100644
--- a/lib/grep.sh
+++ b/lib/grep.sh
@@ -1,31 +1,32 @@
 #!/usr/bin/env bash
+
 # is x grep argument available?
-grep_flag_available() {
-    echo | grep $1 "" >/dev/null 2>&1
+_omb_grep_flag_available() {
+  echo | grep $1 "" >/dev/null 2>&1
 }
 
-GREP_OPTIONS=()
+_omb_grep_options=()
 
 # color grep results
-if grep_flag_available --color=auto; then
-    GREP_OPTIONS+=( "--color=auto" )
+if _omb_grep_flag_available --color=auto; then
+  _omb_grep_options+=( "--color=auto" )
 fi
 
 # ignore VCS folders (if the necessary grep flags are available)
-VCS_FOLDERS="{.bzr,CVS,.git,.hg,.svn}"
+_omb_grep_vcs_folders="{.bzr,CVS,.git,.hg,.svn}"
 
-if grep_flag_available --exclude-dir=.cvs; then
-    GREP_OPTIONS+=( "--exclude-dir=$VCS_FOLDERS" )
-elif grep_flag_available --exclude=.cvs; then
-    GREP_OPTIONS+=( "--exclude=$VCS_FOLDERS" )
+if _omb_grep_flag_available --exclude-dir=.cvs; then
+  _omb_grep_options+=( "--exclude-dir=$_omb_grep_vcs_folders" )
+elif _omb_grep_flag_available --exclude=.cvs; then
+  _omb_grep_options+=( "--exclude=$_omb_grep_vcs_folders" )
 fi
 
 # export grep settings
-if ((${#GREP_OPTIONS[@]} > 0)); then
-  alias grep="grep ${GREP_OPTIONS[*]}"
+if ((${#_omb_grep_options[@]} > 0)); then
+  alias grep="grep ${_omb_grep_options[*]}"
 fi
 
 # clean up
-unset GREP_OPTIONS
-unset VCS_FOLDERS
-unset -f grep_flag_available
+unset -v _omb_grep_options
+unset -v _omb_grep_vcs_folders
+unset -f _omb_grep_flag_available