release.sh

#!/usr/bin/env bash

set -euo pipefail

IMAGE="luizfilipemoresco/mbsync"

DOCKERFILE="${DOCKERFILE:-Dockerfile}"
CONTEXT="${CONTEXT:-.}"
GIT_REMOTE="${GIT_REMOTE:-origin}"
CREATE_GITHUB_RELEASE="${CREATE_GITHUB_RELEASE:-true}"

REPO_OWNER="$(echo "$IMAGE" | cut -d/ -f1)"
REPO_NAME="$(echo "$IMAGE" | cut -d/ -f2)"

if [[ -n "$(git status --porcelain)" ]]; then
  echo "Git working tree is not clean. Commit or stash your changes before releasing."
  exit 1
fi

echo "Image: $IMAGE"
echo "Checking latest version on Docker Hub..."

TAGS_JSON="$(curl -sS "https://hub.docker.com/v2/repositories/${REPO_OWNER}/${REPO_NAME}/tags?page_size=100" || true)"

LATEST_VERSION="$(
  echo "$TAGS_JSON" \
    | grep -oE '"name":"v[0-9]+\.[0-9]+\.[0-9]+"' \
    | sed -E 's/"name":"v([^"]+)"/\1/' \
    | sort -V \
    | tail -n 1 \
    || true
)"

if [[ -z "${LATEST_VERSION:-}" ]]; then
  echo "No existing version tag found."
  echo "Starting with first version."
  NEXT_VERSION="0.1.0"
else
  echo "Latest version found: v$LATEST_VERSION"

  IFS='.' read -r MAJOR MINOR PATCH <<< "$LATEST_VERSION"
  PATCH=$((PATCH + 1))
  NEXT_VERSION="${MAJOR}.${MINOR}.${PATCH}"
fi

echo "Next version: v$NEXT_VERSION"

if git rev-parse "v$NEXT_VERSION" >/dev/null 2>&1; then
  echo "Git tag v$NEXT_VERSION already exists."
  exit 1
fi

echo "Building image..."

docker build \
  -f "$DOCKERFILE" \
  -t "$IMAGE:v$NEXT_VERSION" \
  -t "$IMAGE:latest" \
  "$CONTEXT"

echo "Pushing image tags..."

docker push "$IMAGE:v$NEXT_VERSION"
docker push "$IMAGE:latest"

echo "Creating git tag..."

git tag -a "v$NEXT_VERSION" -m "Release v$NEXT_VERSION"

if git remote get-url "$GIT_REMOTE" >/dev/null 2>&1; then
  echo "Pushing git tag to $GIT_REMOTE..."
  git push "$GIT_REMOTE" "v$NEXT_VERSION"
else
  echo "Git remote '$GIT_REMOTE' not found. Tag created locally only."
fi

if [[ "$CREATE_GITHUB_RELEASE" == "true" ]]; then
  if ! command -v gh >/dev/null 2>&1; then
    echo "GitHub CLI not found. Install gh or set CREATE_GITHUB_RELEASE=false."
    exit 1
  fi

  echo "Creating GitHub release..."

  gh release create "v$NEXT_VERSION" \
    --title "v$NEXT_VERSION" \
    --notes "Docker image: $IMAGE:v$NEXT_VERSION"
fi

echo ""
echo "Done!"
echo "Published:"
echo "  $IMAGE:v$NEXT_VERSION"
echo "  $IMAGE:latest"
echo "  git tag v$NEXT_VERSION"
if [[ "$CREATE_GITHUB_RELEASE" == "true" ]]; then
  echo "  GitHub release v$NEXT_VERSION"
fi