dist/tools: add release stats script

dist/tools/release-stats/release-stats.sh

+#! /bin/sh
+#
+# release-stats.sh
+# Copyright (C) 2017 Martine Lenders <mail@martine-lenders.eu>
+#
+# This file is subject to the terms and conditions of the GNU Lesser
+# General Public License v2.1. See the file LICENSE in the top level
+# directory for more details.
+#
+# This script is intended to help release managers to collect statistics about
+# a release for https://github.com/RIOT-OS/RIOT/wiki/release-statistics
+
+RIOTBASE="$(realpath "$( cd "$(dirname "${0}")" && pwd )/../../..")"
+OLD="${1}"
+NEW="${2}"
+
+if [ $# -lt 2 ]; then
+    echo "usage: ${0} <old> <new> [<riotbase>]" >&2
+    exit 1
+fi
+
+if [ $# -gt 2 ]; then
+    RIOTBASE="$(realpath "${3}")"
+fi
+
+FILES=$(git ls-tree --full-tree -r "${NEW}")
+START=$(git -C "${RIOTBASE}" log -n 1 --pretty="format:%at" "${OLD}")
+END=$(git -C "${RIOTBASE}" log -n 1 --pretty="format:%at" "${NEW}")
+
+echo "    <tr>"
+echo "        <td>${NEW}</td>"
+echo "        <td>$(echo "${FILES}" | wc -l)</td>"
+echo -n "        <td>$(echo "${FILES}"  | awk '{ print $3 }' | xargs -I'{}' git cat-file blob '{}'| wc -l) "
+echo "($(echo "$FILES" | grep -i "[chs]$" | awk '{ print $3 }' | xargs -I'{}' git cat-file blob '{}' | wc -l))</td>"
+echo "        <td>$(( (END - START) / (60 * 60 * 24) )) days</td>"
+echo "        <td>$(git log --no-merges --pretty=oneline "${OLD}".."${NEW}" | wc -l)</td>"
+echo "        <td>$(git diff --shortstat --no-renames "${OLD}".."${NEW}" | sed 's#^\s\+##')</td>"
+echo "        <td>$(git shortlog --no-merges -n -s "${OLD}".."${NEW}" | head -n 5 | sed 's#\s\+# #g;s#^ ##;s#$#<br />#;2,$s#^#            #')</td>"
+echo "    </tr>"