From 3f8e85f3f8d676f2156849755b29a24cc82ac28a Mon Sep 17 00:00:00 2001
From: Part Cyborg <me@partcyb.org>
Date: Mon, 1 Oct 2018 05:11:52 -0700
Subject: [PATCH] Support anchoring the substring to search for

Add a new config variable that will anchor the history search to the beginning of the command.

Note that the default behavior does not change with this
---
 zsh-history-substring-search.zsh | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/zsh-history-substring-search.zsh b/zsh-history-substring-search.zsh
index 0edf85e..a0f3af9 100644
--- a/zsh-history-substring-search.zsh
+++ b/zsh-history-substring-search.zsh
@@ -246,7 +246,13 @@ _history-substring-search-begin() {
     # Escape and join query parts with wildcard character '*' as seperator
     # `(j:CHAR:)` join array to string with CHAR as seperator
     #
-    local search_pattern="*${(j:*:)_history_substring_search_query_parts[@]//(#m)[\][()|\\*?#<>~^]/\\$MATCH}*"
+    local search_pattern="${(j:*:)_history_substring_search_query_parts[@]//(#m)[\][()|\\*?#<>~^]/\\$MATCH}*"
+    #
+    # Support anchoring history search to the beginning of the command
+    # 
+    if [[ -z $HISTORY_SUBSTRING_SEARCH_ANCHORED ]]; then
+      search_pattern="*${search_pattern}"
+    fi
 
     #
     # Find all occurrences of the search pattern in the history file.