added jenkins_plugin_latest_version.sh

jenkins/jenkins_plugin_latest_version.sh

@@ -0,0 +1,62 @@
+#!/usr/bin/env bash
+#  vim:ts=4:sts=4:sw=4:et
+#  args: kubernetes
+#
+#  Author: Hari Sekhon
+#  Date: 2024-01-31 02:32:56 +0000 (Wed, 31 Jan 2024)
+#
+#  https://github.com/HariSekhon/DevOps-Bash-tools
+#
+#  License: see accompanying Hari Sekhon LICENSE file
+#
+#  If you're using my code you're welcome to connect with me on LinkedIn and optionally send me feedback to help steer this or other code I publish
+#
+#  https://www.linkedin.com/in/HariSekhon
+#
+
+set -euo pipefail
+[ -n "${DEBUG:-}" ] && set -x
+srcdir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+
+# shellcheck disable=SC1090,SC1091
+. "$srcdir/lib/utils.sh"
+
+# shellcheck disable=SC2034,SC2154
+usage_description="
+Finds the latest version of a given Jenkins plugin by querying:
+
+    https://updates.jenkins.io/current/update-center.actual.json
+
+Used by update_plugin_versions.sh script in https://github.com/HariSekhon/Kubernetes-configs/tree/master/jenkins/base
+"
+
+# used by usage() in lib/utils.sh
+# shellcheck disable=SC2034
+usage_args="<plugin>"
+
+help_usage "$@"
+
+num_args 1 "$@"
+
+plugin="$1"
+
+url="https://updates.jenkins.io/current/update-center.actual.json"
+
+log "* downloading json"
+json="$(curl -sSfL "$url" || die "failed to fetch json from '$url'")"
+
+log "* checking not blank"
+# extremely poor performance for large 3M json download
+#if is_blank "$json"; then
+if [ -z "$json" ]; then
+    die "json returned from url '$url' is blank!"
+fi
+
+log "* parsing json"
+version="$(jq -r ".plugins[] | select(.name == \"$plugin\") | .version" <<< "$json")"
+
+if is_blank "$version"; then
+    die "plugin '$plugin' version '$version' not found!"
+fi
+
+echo "$version"