Add release-bump.sh script

Author: marcprux

scripts/release-bump.sh

@@ -0,0 +1,138 @@
+#!/usr/bin/env bash
+# Bump the most recent v<major>.<minor>.<patch> tag in this repository,
+# create a GitHub release, and force-update the floating v<major> tag.
+#
+# Usage:
+#   scripts/release-bump.sh [--bump major|minor|patch]
+#
+# Default --bump is "patch". If no semver tag exists yet the script treats
+# the current version as v1.0.0, so the first patch release becomes v1.0.1,
+# the first minor v1.1.0, and the first major v2.0.0.
+
+set -euo pipefail
+
+bump=patch
+while [[ $# -gt 0 ]]; do
+  case "$1" in
+    --bump)        bump="${2:-}"; shift 2 ;;
+    --bump=*)      bump="${1#--bump=}"; shift ;;
+    -h|--help)
+      sed -n '2,11p' "$0" | sed 's/^# \{0,1\}//'
+      exit 0
+      ;;
+    *)
+      echo "release-bump: unknown argument: $1" >&2
+      echo "usage: scripts/release-bump.sh [--bump major|minor|patch]" >&2
+      exit 2
+      ;;
+  esac
+done
+
+case "$bump" in
+  major|minor|patch) ;;
+  *)
+    echo "release-bump: --bump must be one of: major, minor, patch (got '$bump')" >&2
+    exit 2
+    ;;
+esac
+
+# ─── Pre-flight ─────────────────────────────────────────────────────────────
+
+# Run from the repo root so relative behaviour is consistent.
+cd "$(git rev-parse --show-toplevel)"
+
+if ! command -v gh >/dev/null 2>&1; then
+  echo "release-bump: 'gh' (the GitHub CLI) is required but not installed." >&2
+  exit 1
+fi
+
+if [[ -n "$(git status --porcelain)" ]]; then
+  echo "release-bump: working tree is not clean — commit or stash changes first." >&2
+  git status --short >&2
+  exit 1
+fi
+
+# Make sure we have an up-to-date view of remote tags.
+git fetch --tags --quiet origin
+
+# ─── Compute next version ───────────────────────────────────────────────────
+
+# Pick the highest v<major>.<minor>.<patch> tag (annotated or lightweight).
+latest=$(git tag --list 'v[0-9]*.[0-9]*.[0-9]*' --sort=-v:refname | head -n 1 || true)
+if [[ -z "${latest}" ]]; then
+  latest="v1.0.0"
+  no_existing_tag=1
+else
+  no_existing_tag=0
+fi
+
+ver="${latest#v}"
+IFS=. read -r cur_major cur_minor cur_patch <<<"$ver"
+
+if ! [[ "$cur_major" =~ ^[0-9]+$ && "$cur_minor" =~ ^[0-9]+$ && "$cur_patch" =~ ^[0-9]+$ ]]; then
+  echo "release-bump: could not parse '$latest' as v<major>.<minor>.<patch>" >&2
+  exit 1
+fi
+
+case "$bump" in
+  major) new_major=$((cur_major + 1)); new_minor=0;             new_patch=0 ;;
+  minor) new_major=$cur_major;          new_minor=$((cur_minor + 1)); new_patch=0 ;;
+  patch) new_major=$cur_major;          new_minor=$cur_minor;   new_patch=$((cur_patch + 1)) ;;
+esac
+
+new_tag="v${new_major}.${new_minor}.${new_patch}"
+major_tag="v${new_major}"
+
+if git rev-parse --verify --quiet "refs/tags/${new_tag}" >/dev/null; then
+  echo "release-bump: tag ${new_tag} already exists locally; aborting." >&2
+  exit 1
+fi
+
+# ─── Confirm ────────────────────────────────────────────────────────────────
+
+branch=$(git rev-parse --abbrev-ref HEAD)
+head_sha=$(git rev-parse --short HEAD)
+head_subject=$(git log -1 --pretty=%s)
+
+echo "Repository: $(git config --get remote.origin.url 2>/dev/null || echo '<no remote>')"
+echo "Branch:     ${branch}"
+echo "HEAD:       ${head_sha}  ${head_subject}"
+if [[ ${no_existing_tag} -eq 1 ]]; then
+  echo "Latest tag: (none — defaulting to v1.0.0)"
+else
+  echo "Latest tag: ${latest}"
+fi
+echo
+echo "About to:"
+echo "  • create annotated tag ${new_tag} at HEAD"
+echo "  • push ${new_tag} to origin"
+echo "  • create GitHub release ${new_tag} with auto-generated notes"
+echo "  • force-update tag ${major_tag} to point at ${new_tag}"
+echo "  • force-push ${major_tag} to origin"
+echo
+
+read -r -p "Do you want to tag and release ${new_tag} and update the ${major_tag} tag? [y/N] " answer
+case "$answer" in
+  y|Y|yes|YES|Yes) ;;
+  *) echo "Aborted."; exit 0 ;;
+esac
+
+# ─── Execute ────────────────────────────────────────────────────────────────
+
+echo "› git tag -a ${new_tag}"
+git tag -a "${new_tag}" -m "Release ${new_tag}"
+
+echo "› git push origin ${new_tag}"
+git push origin "${new_tag}"
+
+echo "› gh release create ${new_tag} --generate-notes"
+gh release create "${new_tag}" --generate-notes --title "${new_tag}"
+
+echo "› git tag -f ${major_tag} ${new_tag}"
+git tag -f "${major_tag}" "${new_tag}"
+
+echo "› git push --force origin ${major_tag}"
+git push --force origin "${major_tag}"
+
+echo
+echo "Released ${new_tag} and moved ${major_tag} → ${new_tag}."