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#!/usr/bin/env bash
# gstack-config — read/write ~/.gstack/config.yaml
#
# Usage:
# gstack-config get <key> — read a config value
# gstack-config set <key> <value> — write a config value
# gstack-config list — show all config
#
# Env overrides (for testing):
# GSTACK_STATE_DIR — override ~/.gstack state directory
set -euo pipefail
STATE_DIR="${GSTACK_STATE_DIR:-$HOME/.gstack}"
CONFIG_FILE="$STATE_DIR/config.yaml"
case "${1:-}" in
get)
KEY="${2:?Usage: gstack-config get <key>}"
# Validate key (alphanumeric + underscore only)
if ! printf '%s' "$KEY" | grep -qE '^[a-zA-Z0-9_]+$'; then
echo "Error: key must contain only alphanumeric characters and underscores" >&2
exit 1
fi
grep -F "${KEY}:" "$CONFIG_FILE" 2>/dev/null | tail -1 | awk '{print $2}' | tr -d '[:space:]' || true
;;
set)
KEY="${2:?Usage: gstack-config set <key> <value>}"
VALUE="${3:?Usage: gstack-config set <key> <value>}"
# Validate key (alphanumeric + underscore only)
if ! printf '%s' "$KEY" | grep -qE '^[a-zA-Z0-9_]+$'; then
echo "Error: key must contain only alphanumeric characters and underscores" >&2
exit 1
fi
mkdir -p "$STATE_DIR"
# Escape sed special chars in value and drop embedded newlines
ESC_VALUE="$(printf '%s' "$VALUE" | head -1 | sed 's/[&/\]/\\&/g')"
if grep -qF "${KEY}:" "$CONFIG_FILE" 2>/dev/null; then
# Portable in-place edit (BSD sed uses -i '', GNU sed uses -i without arg)
_tmpfile="$(mktemp "${CONFIG_FILE}.XXXXXX")"
sed "s/^${KEY}:.*/${KEY}: ${ESC_VALUE}/" "$CONFIG_FILE" > "$_tmpfile" && mv "$_tmpfile" "$CONFIG_FILE"
else
echo "${KEY}: ${VALUE}" >> "$CONFIG_FILE"
fi
# Auto-relink skills when prefix setting changes (skip during setup to avoid recursive call)
if [ "$KEY" = "skill_prefix" ] && [ -z "${GSTACK_SETUP_RUNNING:-}" ]; then
GSTACK_RELINK="$(dirname "$0")/gstack-relink"
[ -x "$GSTACK_RELINK" ] && "$GSTACK_RELINK" || true
fi
;;
list)
cat "$CONFIG_FILE" 2>/dev/null || true
;;
*)
echo "Usage: gstack-config {get|set|list} [key] [value]"
exit 1
;;
esac