release

#!/usr/bin/env bash
# release - bump version, tag, push, and print the sha256 for the Homebrew tap
#
# Usage:
#   ./release 0.1.0
#   ./release patch     (0.1.0 → 0.1.1)
#   ./release minor     (0.1.0 → 0.2.0)
#   ./release major     (0.1.0 → 1.0.0)

set -euo pipefail

SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
SRC_HEADER="$SCRIPT_DIR/src/header.sh"

# ── Read current version ────────────────────────────────────────────────────

current=$(grep -m1 '^VERSION=' "$SRC_HEADER" | sed 's/VERSION="//;s/"//')

if [[ -z "$current" ]]; then
  echo "Error: could not read VERSION from src/header.sh" >&2
  exit 1
fi

# ── Resolve new version ─────────────────────────────────────────────────────

if [[ -z "${1:-}" ]]; then
  echo "Usage: ./release <version|patch|minor|major>" >&2
  echo "Current version: $current" >&2
  exit 1
fi

IFS='.' read -r major minor patch <<< "$current"

case "$1" in
  patch) new="$major.$minor.$((patch + 1))" ;;
  minor) new="$major.$((minor + 1)).0" ;;
  major) new="$((major + 1)).0.0" ;;
  *)     new="$1" ;;
esac

tag="v$new"

# ── Safety checks ───────────────────────────────────────────────────────────

if [[ "$new" == "$current" ]]; then
  echo "Error: version is already $current" >&2
  exit 1
fi

if git tag -l "$tag" | grep -q .; then
  echo "Error: tag $tag already exists" >&2
  exit 1
fi

if [[ -n "$(git status --porcelain)" ]]; then
  echo "Error: working tree is not clean - commit or stash first" >&2
  exit 1
fi

# ── Bump, benchmark, commit, tag, push ────────────────────────────────────

echo "Releasing: $current → $new ($tag)"

sed -i.bak "s/^VERSION=\"$current\"/VERSION=\"$new\"/" "$SRC_HEADER" && rm -f "$SRC_HEADER.bak"

# Rebuild hdi from source
"$SCRIPT_DIR/build"

# Run benchmarks against the new version
if [[ -x "$SCRIPT_DIR/bench/run" ]]; then
  echo ""
  "$SCRIPT_DIR/bench/run" --log
  "$SCRIPT_DIR/bench/chart"
fi

git add src/header.sh hdi bench/results.csv bench/results.svg demo/demo-latte.gif demo/demo-mocha.gif
git commit -m "Bump version to $new"
git tag "$tag"
git push origin HEAD --tags

# ── Print info needed for Homebrew tap ───────────────────────────────────────────

echo ""
echo "Waiting for release tarball to be available..."
tarball_url="https://github.com/grega/hdi/releases/download/$tag/hdi-$tag.tar.gz"

# Retry until the release workflow finishes and the asset is available
for i in $(seq 1 30); do
  if curl -sfL "$tarball_url" -o /tmp/hdi-release.tar.gz 2>/dev/null; then
    sha=$(shasum -a 256 /tmp/hdi-release.tar.gz | awk '{print $1}')
    rm -f /tmp/hdi-release.tar.gz
    echo ""
    echo "Update homebrew-tap Formula/hdi.rb with..."
    echo "url":
    echo $tarball_url
    echo "sha256":
    echo $sha
    exit 0
  fi
  printf "."
  sleep 10
done

echo "Warning: could not fetch tarball - check $tarball_url manually" >&2
exit 1