compose/script/release/contributors

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#!/bin/bash
set -e
function usage() {
>&2 cat << EOM
Print the list of github contributors for the release
Usage:
$0 <previous release tag>
EOM
exit 1
}
[[ -n "$1" ]] || usage
PREV_RELEASE=$1
BRANCH="$(git rev-parse --abbrev-ref HEAD)"
URL="https://api.github.com/repos/docker/compose/compare"
contribs=$(curl -sf "$URL/$PREV_RELEASE...$BRANCH" | \
jq -r '.commits[].author.login' | \
sort | \
uniq -c | \
sort -nr)
echo "Contributions by user: "
echo "$contribs"
echo
echo "$contribs" | awk '{print "@"$2","}' | xargs