Added release workflow on vX.Y.Z tag

Author: jmattsson

.github/workflows/release.yml

@@ -0,0 +1,26 @@
+---
+name: Release
+"on":
+  push:
+    tags:
+      - 'v[0-9]+.[0-9]+.[0-9]+.*'
+
+defaults:
+  run:
+    shell: bash
+
+jobs:
+  release:
+    name: Package and release
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v5
+      - name: Package
+        run: scripts/release.sh
+      - name: Release
+        uses: softprops/action-gh-release@v2
+        with:
+          files: powersensor-${{github.ref_name}}.zip
+          generate_release_notes: true
+          fail_on_unmatched_files: true

scripts/release.sh

@@ -0,0 +1,29 @@
+#!/bin/bash
+
+set -euo pipefail
+
+cur_dir="${PWD}"
+this_dir=$(dirname "$0")
+root_dir="${this_dir}/.."
+
+cd "${root_dir}" || exit 1
+
+ref="$(git describe --always)"
+manifest_ver=$(jq -r .version custom_components/powersensor/manifest.json)
+if [ "${ref}" != "v${manifest_ver}" ]
+then
+  echo "Error: Current git description ${ref} does not match claimed version v${manifest_ver}!"
+  exit 1
+fi
+
+zipfile="${cur_dir}/powersensor-${ref}.zip" 
+zip "${zipfile}" -r \
+  hacs.json \
+  README.md \
+  custom_components/powersensor/* \
+  --exclude "**/__pycache__/*" \
+
+relfile="$(realpath -s --relative-to="${cur_dir}" "${zipfile}")"
+
+echo "Packaged as: ${relfile}"
+exit 0