#!/usr/bin/env bash
# gstack-slug — output project slug and sanitized branch name
# Usage: eval "$(gstack-slug)"  → sets SLUG and BRANCH variables
# Or:    gstack-slug            → prints SLUG=... and BRANCH=... lines
#
# Security: output is sanitized to [a-zA-Z0-9._-] only, preventing
# shell injection when consumed via source or eval.
set -euo pipefail
RAW_SLUG=$(git remote get-url origin 2>/dev/null | sed 's|.*[:/]\([^/]*/[^/]*\)\.git$|\1|;s|.*[:/]\([^/]*/[^/]*\)$|\1|' | tr '/' '-') || true
RAW_BRANCH=$(git rev-parse --abbrev-ref HEAD 2>/dev/null | tr '/' '-') || true
# Strip any characters that aren't alphanumeric, dot, hyphen, or underscore
SLUG=$(printf '%s' "${RAW_SLUG:-}" | tr -cd 'a-zA-Z0-9._-')
BRANCH=$(printf '%s' "${RAW_BRANCH:-}" | tr -cd 'a-zA-Z0-9._-')
# Fallback when git context is absent
SLUG="${SLUG:-$(basename "$PWD" | tr -cd 'a-zA-Z0-9._-')}"
BRANCH="${BRANCH:-unknown}"
echo "SLUG=$SLUG"
echo "BRANCH=$BRANCH"