#!/usr/bin/env bash
# Fail the commit if gateway-plugin/plugin.yaml's `version:` field drifts
# from the repo-root VERSION file (the single source of truth).
#
# Why: `hermes plugins install <repo>#gateway-plugin` ships ONLY the
# gateway-plugin/ subdirectory into ~/.hermes/plugins/iris, so in production
# the gateway advertises the version from plugin.yaml (see
# gateway-plugin/version.py). If the two drift, the app shows a false
# "versions differ" warning.
set -euo pipefail

repo_root="$(git rev-parse --show-toplevel)"
version_file="$repo_root/VERSION"
plugin_yaml="$repo_root/gateway-plugin/plugin.yaml"

[ -f "$version_file" ] || {
    echo "check_version_sync: missing $version_file" >&2
    exit 1
}
[ -f "$plugin_yaml" ] || {
    echo "check_version_sync: missing $plugin_yaml" >&2
    exit 1
}

root_version="$(tr -d '[:space:]' <"$version_file")"
# Mirrors gateway-plugin/version.py's _VERSION_RE: optional single OR double
# quote, at least one captured character.
yaml_version="$(sed -n "s/^version:[[:space:]]*[\"']\{0,1\}\([^\"'[:space:]]\{1,\}\).*/\1/p" "$plugin_yaml" | head -n1)"

if [ -z "$yaml_version" ]; then
    echo "check_version_sync: no top-level 'version:' field in gateway-plugin/plugin.yaml" >&2
    exit 1
fi

if [ "$root_version" != "$yaml_version" ]; then
    echo "check_version_sync: version drift" >&2
    echo "  VERSION (repo root)          = $root_version" >&2
    echo "  gateway-plugin/plugin.yaml   = $yaml_version" >&2
    echo "Bump both to the same value (VERSION is the source of truth)." >&2
    exit 1
fi