# shellcheck shell=bash
# Cache completion scripts to avoid subprocess overhead on every shell start.
#
# Usage:  cached_completion <tool> <generation-command...>
# Example: cached_completion gh gh completion -s bash
#
# The cache file is regenerated when the tool binary is newer than the cache.
# Cache location: ${XDG_CACHE_HOME:-$HOME/.cache}/bash.d/

_COMP_CACHE="${XDG_CACHE_HOME:-$HOME/.cache}/bash.d"

cached_completion() {
    local tool="$1"; shift
    local cache_file="${_COMP_CACHE}/${tool}.bash"
    local tool_path
    tool_path="$(command -v "$tool" 2>/dev/null)" || return

    if [[ ! -f "$cache_file" || "$tool_path" -nt "$cache_file" ]]; then
        mkdir -p "$_COMP_CACHE"
        "$@" > "$cache_file" 2>/dev/null || return
    fi

    # shellcheck disable=SC1090
    . "$cache_file"
}