From 809b25b1ac5a9e7b236b207d8d0e04579c2b055e Mon Sep 17 00:00:00 2001
From: Bill Rossi <bassguitarbill@gmail.com>
Date: Fri, 27 Dec 2024 12:35:07 -0500
Subject: [PATCH] Use more idiomatic clargs

---
 bin/run | 41 +++++++++++++++++++++++++++++++----------
 1 file changed, 31 insertions(+), 10 deletions(-)

diff --git a/bin/run b/bin/run
index 4c45a47..105e4a9 100755
--- a/bin/run
+++ b/bin/run
@@ -1,21 +1,45 @@
 #!/usr/bin/env bash
 
+show_help() {
+    echo "usage: $0 --lang=lang --year=year --day=day"
+}
+
+language=''
+year='0'
+day='0'
+
 #
 # check args
 #
+while :; do
+    case $1 in
+	-h|-\?|--help)
+	    show_help    # Display a usage synopsis.
+	    exit
+	    ;;
+	--lang=?*)
+	    language=${1#*=}
+	    ;;
+	--year=?*)
+	    year=${1#*=}
+	    ;;
+	--day=?*)
+	    day=${1#*=}
+	    ;;
+	-?*)
+	    printf 'WARN: Unknown option (ignored): %s\n' "$1" >&2
+	    ;;
+	*)
+	    break
+    esac
 
-if [[ $# -ne 3 ]]
-then
-   echo "usage: $0 year day"
-   exit 1
-fi
+    shift
+done
 
 #
 # check year and day
 #
 
-year=$(($2))
-
 if [[ $year -lt 2015 ]]
 then
     echo "invalid year: $2"
@@ -23,8 +47,6 @@ then
     exit 2
 fi
 
-day=$(($3))
-
 if [[ $day -lt 1 ]] || [[ $day -gt 25 ]]
 then
     echo "invalid day: $3"
@@ -55,7 +77,6 @@ then
     curl -s -b "$(cat ../cookie)" $input_url > $input_path
 fi
 
-language=$1
 valid_languages=""
 valid_language="false"