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#!/bin/bash
set -e
# ###########################################################################################################
# This script generates a AUTHORS file in the current directory based on the
# output of the git log command. It splits the contributors in 2 groups:
# * The "active contributors" are the contributors that authored commits over the last 2 years
# * The "retired contributors" are the contributors that have authored commits but not over the last 2 years
# Note: it uses git's mailmap functionnality to get a clean list of users
# ###########################################################################################################
declare -A CONTRIBUTORS=()
declare -a authors=()
TWO_YEARS_AGO=$(date +%s --date="2 years ago")
retiredTitleWritten=false
git log --encoding=utf-8 --full-history --date=short --use-mailmap "--format=format:%ad;%aN" |
{
echo "# Active contributors:" > AUTHORS
while read -r line; do
IFS=';'; arrLine=($line); unset IFS;
author=${arrLine[1]}
commitDate=$(date +%s --date="${arrLine[0]}")
# Exclude circleci
if [[ $author =~ [Cc]ircle[[:space:]]*[Cc][Ii] ]]; then
continue
fi
# indicates that the commits are now older than 2 years so we print the
# sorted list of active contributors and reset the authors array
if [ "$retiredTitleWritten" = false ]; then
if [ $TWO_YEARS_AGO -ge $commitDate ]; then
IFS=$'\n' sorted=($(sort <<<"${authors[*]}"))
printf "%s\n" "${sorted[@]}" >> AUTHORS
authors=()
echo -e "\n# Retired contributors:" >> AUTHORS
retiredTitleWritten=true
fi
fi
# using the map as an easy way to check if the author has already been listed
if [ -z "${CONTRIBUTORS[${author}]}" ]; then
CONTRIBUTORS[${author}]=${arrLine[0]}
authors+=("${author}")
fi
done
# We are still in the subprocess scope so we can print the sorted list of
# retired contributors
IFS=$'\n' sorted=($(sort <<<"${authors[*]}"))
printf "%s\n" "${sorted[@]}" >> AUTHORS
}
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