From 5f8d2e81350c326b31be12731e120efbbd6e9c16 Mon Sep 17 00:00:00 2001
From: EuAndreh <eu@euandre.org>
Date: Sat, 13 Aug 2022 09:40:52 -0300
Subject: bin/{uc,lc}: Add working utilities

---
 bin/lc | 70 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 70 insertions(+)
 create mode 100755 bin/lc

(limited to 'bin/lc')

diff --git a/bin/lc b/bin/lc
new file mode 100755
index 0000000..111b91b
--- /dev/null
+++ b/bin/lc
@@ -0,0 +1,70 @@
+#!/bin/sh
+set -eu
+
+usage() {
+	cat <<-'EOF'
+		Usage:
+		  lc
+		  lc -h
+	EOF
+}
+
+help() {
+	cat <<-'EOF'
+
+		Options:
+		  -h, --help    show this message
+
+
+		Transforms text from STDIN from upper-case to lower-case.  It is
+		the equivalent of running 'tr [:upper:] [:lower:]'.
+
+
+		Examples:
+
+		  Normalize to lower-case:
+
+		    $ echo EuAndreh | lc
+		    euandreh
+
+
+		  Keep the text as-is:
+
+		    $ echo andreh | lc
+		    andreh
+	EOF
+}
+
+
+for flag in "$@"; do
+	case "$flag" in
+		--)
+			break
+			;;
+		--help)
+			usage
+			help
+			exit
+			;;
+		*)
+			;;
+	esac
+done
+
+while getopts 'h' flag; do
+	case "$flag" in
+		h)
+			usage
+			help
+			exit
+			;;
+		*)
+			usage >&2
+			exit 2
+			;;
+	esac
+done
+shift $((OPTIND - 1))
+
+
+tr '[:upper:]' '[:lower:]'
-- 
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