added a date generator

1 files changed, 29 insertions, 0 deletions

diff --git a/generate-dates.sh b/generate-dates.sh
new file mode 100755
index 0000000..ee3796e
--- /dev/null
+++ b/generate-dates.sh
@@ -0,0 +1,29 @@
+#!/bin/bash
+
+usage() {
+    printf "%s\n" \
+        "generate YYYY-MM-DD dates for a range" \
+        "usage: $(basename ${0}) -s <start YYYY-MM-DD> -e <end YYYY-MM-DD>"
+    exit 1
+}
+
+while getopts "s:e:h" opts; do
+    case "${opts}" in
+        s) start="${OPTARG}";;
+        e) end="${OPTARG}";;
+        h) usage;;
+        *) usage;;
+    esac
+done
+
+if test "${start}" && test "${end}"; then
+    current="${start}"
+
+    while [[ "$current" < "$end" || "$current" == "$end" ]]; do
+      printf "%s\n" "${current}"
+      current=$(date -I -d "${current} + 1 day")
+    done
+else
+    usage
+fi
+