154 lines
4.0 KiB
Bash
154 lines
4.0 KiB
Bash
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#!/bin/bash
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set -euo pipefail
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# =====================================================
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# bash-ini v1.0.0 | (c) 2024 DrMaxNix | www.drmaxnix.de
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# =====================================================
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#
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# Parse a ini config file.
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#
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# @param $1 Path to ini file.
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# @param $2 (Optional) prefix for output variable names.
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#
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ini_parse(){
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## VALIDATE PATH ##
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# get from param
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local path="$1"
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# make sure it is readable
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if [[ ! -r "$path" ]]; then
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ini_log_error "Unable to read config file '$path'"
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fi
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## VAR PREFIX ##
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# get from param or fallback
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local var_prefix="${2:-ini}"
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# validate format
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if [[ ! "$var_prefix" =~ ^[a-z0-9]+(_[a-z0-9]+)*$ ]]; then
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ini_log_error "Invalid variable prefix '$var_prefix'"
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fi
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# build global var names
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local -n out_section_list="${var_prefix}"
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local line
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local section_name
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while IFS= read -r line; do
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## TRIM WHITESPACES ##
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line=$(echo "$line" | sed -E "s/^\s*//g" | sed -E "s/\s*$//g")
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## IGNORE LINES ##
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# empty lines
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if [[ "$line" == "" ]]; then
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# ignore
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continue; fi
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# comments
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if [[ "$line" =~ ^# || "$line" =~ ^\; ]]; then
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# ignore
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continue; fi
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## MATCH SECTION HEADER ##
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if [[ "$line" =~ ^\[.*\]$ ]]; then
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# get section name
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section_name=$(echo "$line" | sed -E "s/^\[(.*)\]$/\1/g")
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# trim whitespaces
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section_name=$(echo "$section_name" | sed -E "s/^\s*//g" | sed -E "s/\s*$//g")
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# validate format
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if [[ ! "$section_name" =~ ^[A-Za-z0-9]+([\._-][A-Za-z0-9]+)*$ ]]; then
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ini_log_error "Invalid section name '$section_name'"
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fi
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# rewrite section name
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section_name=$(echo "$section_name" | tr 'A-Z' 'a-z' | tr '-' '_' | tr '.' '_')
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# maybe add to section list
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local found="no"
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for s in ${out_section_list[*]:-}; do
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if [[ "$s" == "$section_name" ]]; then found="yes"; break; fi
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done
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if [[ "$found" != "yes" ]]; then
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out_section_list=(${out_section_list[@]:-""} "$section_name")
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fi
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# declare section map
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section_map_varname="${var_prefix}__${section_name}"
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declare -g -A ${section_map_varname}
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continue; fi
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## MATCH ASSIGNMENT ##
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if [[ "$line" =~ ^([A-Za-z0-9]+([\._-][A-Za-z0-9]+)*)[[:space:]\t]*=[[:space:]\t]*(.*)$ ]]; then
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# maybe enter root section
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if [[ ! "${section_name:+x}" ]]; then
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section_name="_root"
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out_section_list=(${out_section_list[@]:-""} "$section_name")
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section_map_varname="${var_prefix}__${section_name}"
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declare -g -A ${section_map_varname}
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fi
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# get key and value
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local key=$(echo "$line" | sed -E "s/^([A-Za-z0-9]+([\._-][A-Za-z0-9]+)*)[ \t]*=[ \t]*(.*)$/\1/g")
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local value=$(echo "$line" | sed -E "s/^([A-Za-z0-9]+([\._-][A-Za-z0-9]+)*)[ \t]*=[ \t]*(.*)$/\3/g")
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# maybe trim quote marks
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if [[ "$value" =~ ^\".*\"$ ]]; then
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value=$(echo "$value" | sed -E "s/^\"(.*)\"$/\1/g")
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elif [[ "$value" =~ ^\'.*\'$ ]]; then
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value=$(echo "$value" | sed -E "s/^'(.*)'$/\1/g")
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fi
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# maybe add key to key list
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local -n out_section_key_list="${var_prefix}__${section_name}__key_list"
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local found="no"
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for k in ${out_section_key_list[*]:-}; do
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if [[ "$k" == "$key" ]]; then found="yes"; break; fi
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done
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if [[ "$found" != "yes" ]]; then
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out_section_key_list=(${out_section_key_list[@]:-""} "$key")
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fi
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# set value in section map
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local -n out_section_map="${var_prefix}__${section_name}"
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out_section_map[$key]="$value"
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continue; fi
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## UNKNOWN ##
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ini_log_error "Unknown config string '$line'"
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done < "$path"
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}
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#
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# HELPER: try calling external logger, else use fallback.
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#
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# @param $1 Message to print.
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#
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ini_log_debug(){
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if [[ "$(type -t log_debug)" == "function" ]]; then log_debug "$1"; return; fi
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echo "[DEBUG] $1" 1>&2
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}
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ini_log_info(){
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if [[ "$(type -t log_info)" == "function" ]]; then log_info "$1"; return; fi
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echo "[INFO ] $1" 1>&2
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}
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ini_log_warn(){
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if [[ "$(type -t log_warn)" == "function" ]]; then log_warn "$1"; return; fi
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echo "[WARN ] $1" 1>&2
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}
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ini_log_error(){
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if [[ "$(type -t log_error)" == "function" ]]; then log_error "$1"; return; fi
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echo "[ERROR] $1" 1>&2
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exit 1
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}
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