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#!/usr/bin/env bash
#
# @license Apache-2.0
#
# Copyright (c) 2017 The Stdlib Authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# Prints the number of files changed per month.
#
# <month> <year> <files_changed>
# Determine root directory:
root="$(git rev-parse --show-toplevel)"
# Define the path to a utility to generate commit short stats:
shortstats="${root}/tools/git/scripts/shortstats"
# * `shortstats`
# - Get summary statistics for each commit.
# * `awk '{}'`
# - Tabulate the monthly totals.
# * `sort -k1n -k2M`
# - Sort the year numerically and sort the second key as a month.
# * `awk '{}'`
# - Format the output.
"${shortstats}" | awk '
{
mon = $5 OFS $2
lines[mon] += $8
}
END {
for (mon in lines) {
print mon OFS lines[mon]
}
}' | sort -k1n -k2M | awk '{print $2 OFS $1 OFS $3}'
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