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commits_per_year
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executable file
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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 commits per year.
#
# <year> <num_commits>
# * `git log`
# - Show commit logs.
# * `grep '^Date'`
# - Extract the line which begins with `Date` from each log
# * `awk '{}'`
# - From each date line, extract the year (`$6`).
# * `sort -r`
# - Sort in reverse lexicographic order.
# * `uniq -c`
# - Remove repeated lines and count the repeats to compute yearly totals.
git log | grep '^Date' | awk '{print $6}' | sort -r | uniq -c | awk '{print $2 OFS $1}'