From 2c0d38fd8b8e21e84fad2afffc5e9fee2fba2501 Mon Sep 17 00:00:00 2001
From: Rob Muhlestein <rob@rwx.gg>
Date: Fri, 30 Jun 2023 20:33:30 -0400
Subject: [PATCH] feat: add center

---
 scripts/center | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)
 create mode 100755 scripts/center

diff --git a/scripts/center b/scripts/center
new file mode 100755
index 0000000..2df5703
--- /dev/null
+++ b/scripts/center
@@ -0,0 +1,25 @@
+#!/usr/bin/env bash
+
+# Produces a centered text based on HRULEWIDTH environment variable.
+
+: "${HRULEWIDTH:=73}"
+
+_filter() {
+	[[ -n "$1" ]] && return 1
+	while IFS= read -ra args; do
+		"${FUNCNAME[1]}" "${args[@]}"
+	done
+}
+
+center() {
+	_filter "$@" && return $?
+	local str="$1" char="${2:- }"
+	local -i len=${#str}
+	local -i side=$((((HRULEWIDTH / 2) - len / 2) - 3))
+	local -i left=$side
+	local -i right=$side
+	((len % 2 == 1)) && ((right -= 1))
+	echo "$pre $(echon "$char" "$left") "$str" $(echon "$char" "$right")"
+}
+
+center "$@"