generate-changelog.sh

set -e

verbose() {
  echo $ "$@" >&2
  "$@"
}

COMPARISON="${1:-origin/prod...origin/main}"

OUT=".git/changelog.out.html"
true >"$OUT"
echo "<title>$COMPARISON</title>" >>"$OUT"
echo "<style>:root { font: 14px sans-serif; } </style>" >>"$OUT"
echo "<ul>" >>"$OUT"
out=$(verbose git log --merges --oneline "$COMPARISON") && echo "$out" | while read line; do
  PR_NUMBER=$(sed -n 's/.*Merge pull request #\([0-9]*\).*/\1/p' <<<"$line")
  verbose gh pr view "$PR_NUMBER" --json title,number,url |
    node -e 'x = JSON.parse(require("fs").readFileSync(0, "utf-8")); console.log(`<li><a href="${x.url}">${x.title.replace(/&/g, `&amp;`).replace(/</g, `&lt;`)} #${x.number}</a></li>`)' >>"$OUT"
done
test $? -eq 0 || exit 1
echo "</ul>" >>"$OUT"

echo "Changelog generated: $OUT"

if command -v xdg-open &>/dev/null; then
  xdg-open "$OUT"
elif command -v open &>/dev/null; then
  open "$OUT"
fi