configure

#!/usr/bin/env bash

# get directory where this script lives
source_dir="$( cd "$( [[ -h "${BASH_SOURCE[0]}" ]] && dirname "$(readlink "${BASH_SOURCE[0]}")" || dirname "${BASH_SOURCE[0]}" )" && pwd )"

# source common functions
source "${source_dir}/.functions.sh"

# source common defaults
source "${source_dir}/.defaults.sh"

# set the config file name
config_file="init.config"

# declare some arrays
declare -A action_execs error_is_fatal variables

# define actions that can be taken
# note that these must be in order from first to last
actions=()
#             action_name   action_execs                                        error_is_fatal
define_action "prereq"      "check_prereqs"                                     "true"
define_action "minver"      "check_minimum_version"                             "true"
define_action "precmd"      "run_command"                                       "true"
define_action "backup"      "back_up_files"                                     "false"
define_action "submodule"   "git submodule update --init --remote --force --"   "false"
define_action "download"    "download"                                          "false"
define_action "directory"   "mkdir -p"                                          "false"
define_action "link"        "create_links"                                      "false"
define_action "postcmd"     "run_command"                                       "false"

# define variables that can be used
variables["base_dir"]="${PWD}"
variables["home_dir"]="${HOME}"
variables["xdg_config_home"]="${XDG_CONFIG_HOME:-"${default[XDG_CONFIG_HOME]}"}"
variables["xdg_data_home"]="${XDG_DATA_HOME:-"${default[XDG_DATA_HOME]}"}"
variables["xdg_cache_home"]="${XDG_CACHE_HOME:-"${default[XDG_CACHE_HOME]}"}"
variables["config_dir"]=""

# run through the list of configs
for config_subdir in $@; do
    # check to make sure the config exists, is readable, and isn't empty
    if [[ -d "${config_subdir}" && -r "${config_subdir}/${config_file}" && -s "${config_subdir}/${config_file}" ]]; then
        echo "configuring ${config_subdir}..."

        # make sure that the correct config subdir is being used
        variables[config_dir]="${PWD}/${config_subdir}"

        # run through all the actions
        for action in ${actions[@]}; do
            # get the options for the current action
            options="$(parse_config_action ${config_subdir}/${config_file} ${action} $(tuplify_variables))"
            # only execute the action if there are options
            if [[ -n "$options" ]]; then
                echo "    action: ${action}"
                echo "      └ executing: ${action_execs[${action}]} ${options}"
                ${action_execs[${action}]} ${options}
                if [[ $? -ne 0 && ${error_is_fatal[${action}]} == 'true' ]]; then
                    echo "      └ error: fatal"
                    break
                fi
            fi
        done
    fi
done