chore(release): add changelog generation and release automation

scripts/release.sh

@@ -0,0 +1,138 @@
+#!/usr/bin/env bash
+#
+# release.sh — Automate version bump, changelog generation, and tag creation.
+#
+# Usage:
+#   ./scripts/release.sh patch|minor|major    Auto-bump from latest tag
+#   ./scripts/release.sh 0.5.0               Explicit version
+#   ./scripts/release.sh --dry-run patch      Preview without changes
+#
+set -euo pipefail
+
+VERSION_FILE="internal/cmd/version.go"
+CHANGELOG_FILE="CHANGELOG.md"
+
+# ── Colors ──────────────────────────────────────────────────────────
+RED='\033[0;31m'
+GREEN='\033[0;32m'
+YELLOW='\033[1;33m'
+CYAN='\033[0;36m'
+BOLD='\033[1m'
+NC='\033[0m'
+
+info()  { echo -e "${CYAN}▸${NC} $*"; }
+ok()    { echo -e "${GREEN}✓${NC} $*"; }
+warn()  { echo -e "${YELLOW}⚠${NC} $*"; }
+error() { echo -e "${RED}✗${NC} $*" >&2; }
+die()   { error "$@"; exit 1; }
+
+# ── Args ────────────────────────────────────────────────────────────
+DRY_RUN=false
+BUMP=""
+
+for arg in "$@"; do
+  case "$arg" in
+    --dry-run) DRY_RUN=true ;;
+    patch|minor|major) BUMP="$arg" ;;
+    [0-9]*) BUMP="$arg" ;;
+    -h|--help)
+      echo "Usage: $0 [--dry-run] <patch|minor|major|X.Y.Z>"
+      exit 0
+      ;;
+    *) die "Unknown argument: $arg" ;;
+  esac
+done
+
+[ -z "$BUMP" ] && die "Usage: $0 [--dry-run] <patch|minor|major|X.Y.Z>"
+
+# ── Prerequisites ───────────────────────────────────────────────────
+command -v git-cliff >/dev/null 2>&1 || die "git-cliff not found. Install: https://git-cliff.org/docs/installation"
+
+if [ "$DRY_RUN" = false ]; then
+  [ -n "$(git status --porcelain)" ] && die "Working tree is dirty. Commit or stash changes first."
+fi
+
+CURRENT_BRANCH=$(git branch --show-current)
+[ "$CURRENT_BRANCH" = "main" ] || warn "Not on main branch (current: $CURRENT_BRANCH)"
+
+# ── Resolve version ────────────────────────────────────────────────
+LATEST_TAG=$(git describe --tags --abbrev=0 2>/dev/null || echo "v0.0.0")
+LATEST_VERSION="${LATEST_TAG#v}"
+
+bump_version() {
+  local version="$1" part="$2"
+  IFS='.' read -r major minor patch <<< "$version"
+  case "$part" in
+    major) echo "$((major + 1)).0.0" ;;
+    minor) echo "$major.$((minor + 1)).0" ;;
+    patch) echo "$major.$minor.$((patch + 1))" ;;
+  esac
+}
+
+case "$BUMP" in
+  patch|minor|major) NEXT_VERSION=$(bump_version "$LATEST_VERSION" "$BUMP") ;;
+  *)                 NEXT_VERSION="$BUMP" ;;
+esac
+
+NEXT_TAG="v${NEXT_VERSION}"
+
+echo ""
+echo -e "${BOLD}  Release Plan${NC}"
+echo -e "  ─────────────────────────────"
+echo -e "  Current tag:  ${YELLOW}${LATEST_TAG}${NC}"
+echo -e "  Next version: ${GREEN}${NEXT_TAG}${NC}"
+echo -e "  Dry run:      ${DRY_RUN}"
+echo ""
+
+# ── Preview changelog ───────────────────────────────────────────────
+info "Generating changelog for ${NEXT_TAG}..."
+CHANGELOG_PREVIEW=$(git-cliff --tag "$NEXT_TAG" --unreleased --strip header)
+
+if [ -z "$CHANGELOG_PREVIEW" ]; then
+  die "No conventional commits found since ${LATEST_TAG}. Nothing to release."
+fi
+
+echo -e "${BOLD}  Changes in ${NEXT_TAG}:${NC}"
+echo "$CHANGELOG_PREVIEW" | sed 's/^/  /'
+echo ""
+
+# ── Dry run stops here ─────────────────────────────────────────────
+if [ "$DRY_RUN" = true ]; then
+  ok "Dry run complete. No changes made."
+  exit 0
+fi
+
+# ── Confirm ─────────────────────────────────────────────────────────
+echo -ne "${YELLOW}Proceed with release ${NEXT_TAG}? [y/N]${NC} "
+read -r CONFIRM
+[[ "$CONFIRM" =~ ^[Yy]$ ]] || { info "Aborted."; exit 0; }
+
+# ── Update version.go ──────────────────────────────────────────────
+info "Updating ${VERSION_FILE}..."
+sed -i "s/var Version = \".*\"/var Version = \"${NEXT_VERSION}\"/" "$VERSION_FILE"
+ok "Version set to ${NEXT_VERSION}"
+
+# ── Update CHANGELOG.md ────────────────────────────────────────────
+info "Updating ${CHANGELOG_FILE}..."
+git-cliff --tag "$NEXT_TAG" --output "$CHANGELOG_FILE"
+ok "Changelog updated"
+
+# ── Commit and tag ──────────────────────────────────────────────────
+info "Creating release commit..."
+git add "$VERSION_FILE" "$CHANGELOG_FILE"
+git commit -m "chore(release): ${NEXT_VERSION}
+
+- Bump version to ${NEXT_VERSION}
+- Update CHANGELOG.md"
+
+info "Creating annotated tag ${NEXT_TAG}..."
+git tag -a "$NEXT_TAG" -m "Release ${NEXT_TAG}"
+
+echo ""
+ok "Release ${NEXT_TAG} created successfully!"
+echo ""
+echo -e "  ${BOLD}Next steps:${NC}"
+echo -e "  Push to trigger CI release pipeline:"
+echo ""
+echo -e "    ${CYAN}git push origin main --follow-tags${NC}"
+echo ""