Generate markdown change log from merged PR titles

changes.sh

#!/usr/bin/env bash

set -o errexit
set -o nounset
set -o pipefail

# org/repo (e.g. karlkfi/probe)
REPO=$1
# range (e.g. 1.8.4..1.8.5)
RANGE=$2
# username:token (https://github.com/blog/1509-personal-api-tokens)
USERNAME_TOKEN=$3

PRS=$(
	git log --merges --oneline ${RANGE} | \
		sed "s/.*#\([0-9]*\).*/\1/" | \
		sort -n
)

for PR in ${PRS}; do
    PR_TITLE="$(curl --fail --location --silent --show-error -u ${USERNAME_TOKEN} https://api.github.com/repos/${REPO}/pulls/${PR} | jq '.title')"
    echo "[#${PR}](https://github.com/${REPO}/pulls/${PR}) - ${PR_TITLE}"
done