A script to get count of Jenkins plugins by license type. It downloads data about all plugins published to Jenkins Update Center, then downloads their pom.xml from SCM link mentioned in update-center.json, and finally counts occurrences per license name and prints stats. Referred this gist: https://gist.github.com/michaellihs/a844a93cb3575beb269…

jenkins_plugins_license_stats.sh

#!/bin/bash

JQ=$(which jq)
CURL=$(which curl)
XPATH=$(which xpath)
$CURL -s https://updates.jenkins.io/current/update-center.actual.json -o update-center.actual.json

$JQ '.plugins[] | .scm' update-center.actual.json > plugin_repos.txt

input_file="plugin_repos.txt"
output_file="stats_jp.out.mid"
while IFS= read -r line
do
	raw_content_url=$(echo $line | sed s/github.com/raw.githubusercontent.com/g | sed s/\"//g)
	if [[ "$raw_content_url" == "null" ]]; then
		continue
	fi
	license_name=$($CURL -s "$raw_content_url/master/pom.xml" | $XPATH -q -e '//project/licenses/license/name/text()')
	echo "$license_name" >> stats_jp.out.mid
done < "$input_file"

sort stats_jp.out.mid | uniq -c | sort -bgr > stats_jp.out
cat stats_jp.out
rm update-center.actual.json plugin_repos.txt stats_jp.out.mid