#!/usr/bin/env bash
set -eu

if [ -z "$1" ]; then
  echo "Missing version argument; this script should be invoked as:"
  echo "$ ./dev/bump-version M.N.P"
  exit 1
fi

if [ -z "$GITHUB_TOKEN" ]; then
  echo "Missing GitHub Token environment variable."
  exit 1
fi

echo "Updating package.json."
yarn version --no-git-tag-version --new-version $1
echo "Updating CHANGELOG.md."
npx github-changes --only-pulls --branch main --owner sourcegraph --repository scip-typescript --tag-name "v$1" --token "$GITHUB_TOKEN"

# HACK: github-changes doesn't seem to have a good way to get a delta since
# a particular tag to a _future_ tag; the --between-tags argument expects
# that the second tag in the range to already exist, whereas what we want
# to do here is first merge the ChangeLog and then add the new tag.

# ✅ -f, -n and -s are supported on GNU csplit and BSD csplit.
csplit -f CL -n 1 -s CHANGELOG.md '/### v0.1.17/'

# ✅ -i<ext> works on both GNU sed and BSD sed.
# See https://stackoverflow.com/a/22084103/2682729
sed -i.bak -e 's/scip-typescript/lsif-typescript/g' CL1 && rm CL1.bak

cat CL0 CL1 > CHANGELOG.md && rm CL0 CL1

yarn run prettier

git add .
TITLE="Update ChangeLog and bump version for releasing $1."
git commit -m "$TITLE"

gh pr create --base main --title "$TITLE" --body '
### Test plan

Ran automated tests.'

echo "-------------------------------------------------------------------------"
echo "Don't forget to push a version tag v$1 to main once the PR is merged!"
echo "-------------------------------------------------------------------------"