From 0ce81956e20b07daa789416cdb96e771f11da831 Mon Sep 17 00:00:00 2001
From: DrMaxNix <git@drmaxnix.de>
Date: Fri, 31 May 2024 21:45:14 +0200
Subject: [PATCH] :tada: initial codebase

---
 ini.sh | 153 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 153 insertions(+)
 create mode 100644 ini.sh

diff --git a/ini.sh b/ini.sh
new file mode 100644
index 0000000..7badc14
--- /dev/null
+++ b/ini.sh
@@ -0,0 +1,153 @@
+#!/bin/bash
+set -euo pipefail
+
+# =====================================================
+# bash-ini v1.0.0 | (c) 2024 DrMaxNix | www.drmaxnix.de
+# =====================================================
+
+#
+# Parse a ini config file.
+#
+# @param $1		Path to ini file.
+# @param $2		(Optional) prefix for output variable names.
+#
+ini_parse(){
+	## VALIDATE PATH ##
+	# get from param
+	local path="$1"
+	
+	# make sure it is readable
+	if [[ ! -r "$path" ]]; then
+		ini_log_error "Unable to read config file '$path'"
+	fi
+	
+	
+	## VAR PREFIX ##
+	# get from param or fallback
+	local var_prefix="${2:-ini}"
+	
+	# validate format
+	if [[ ! "$var_prefix" =~ ^[a-z0-9]+(_[a-z0-9]+)*$ ]]; then
+		ini_log_error "Invalid variable prefix '$var_prefix'"
+	fi
+	
+	# build global var names
+	local -n out_section_list="${var_prefix}"
+	
+	
+	local line
+	local section_name
+	while IFS= read -r line; do
+		## TRIM WHITESPACES ##
+		line=$(echo "$line" | sed -E "s/^\s*//g" | sed -E "s/\s*$//g")
+		
+		
+		## IGNORE LINES ##
+		# empty lines
+		if [[ "$line" == "" ]]; then
+			# ignore
+		continue; fi
+		
+		# comments
+		if [[ "$line" =~ ^# || "$line" =~ ^\; ]]; then
+			# ignore
+		continue; fi
+		
+		
+		## MATCH SECTION HEADER ##
+		if [[ "$line" =~ ^\[.*\]$ ]]; then
+			# get section name
+			section_name=$(echo "$line" | sed -E "s/^\[(.*)\]$/\1/g")
+			
+			# trim whitespaces
+			section_name=$(echo "$section_name" | sed -E "s/^\s*//g" | sed -E "s/\s*$//g")
+			
+			# validate format
+			if [[ ! "$section_name" =~ ^[A-Za-z0-9]+([\._-][A-Za-z0-9]+)*$ ]]; then
+				ini_log_error "Invalid section name '$section_name'"
+			fi
+			
+			# rewrite section name
+			section_name=$(echo "$section_name" | tr 'A-Z' 'a-z' | tr '-' '_' | tr '.' '_')
+			
+			# maybe add to section list
+			local found="no"
+			for s in ${out_section_list[*]:-}; do
+				if [[ "$s" == "$section_name" ]]; then found="yes"; break; fi
+			done
+			if [[ "$found" != "yes" ]]; then
+				out_section_list=(${out_section_list[@]:-""} "$section_name")
+			fi
+			
+			# declare section map
+			section_map_varname="${var_prefix}__${section_name}"
+			declare -g -A ${section_map_varname}
+		continue; fi
+		
+		
+		## MATCH ASSIGNMENT ##
+		if [[ "$line" =~ ^([A-Za-z0-9]+([\._-][A-Za-z0-9]+)*)[[:space:]\t]*=[[:space:]\t]*(.*)$ ]]; then
+			# maybe enter root section
+			if [[ ! "${section_name:+x}" ]]; then
+				section_name="_root"
+				out_section_list=(${out_section_list[@]:-""} "$section_name")
+				section_map_varname="${var_prefix}__${section_name}"
+				declare -g -A ${section_map_varname}
+			fi
+			
+			# get key and value
+			local key=$(echo "$line" | sed -E "s/^([A-Za-z0-9]+([\._-][A-Za-z0-9]+)*)[ \t]*=[ \t]*(.*)$/\1/g")
+			local value=$(echo "$line" | sed -E "s/^([A-Za-z0-9]+([\._-][A-Za-z0-9]+)*)[ \t]*=[ \t]*(.*)$/\3/g")
+			
+			# maybe trim quote marks
+			if [[ "$value" =~ ^\".*\"$ ]]; then
+				value=$(echo "$value" | sed -E "s/^\"(.*)\"$/\1/g")
+			elif [[ "$value" =~ ^\'.*\'$ ]]; then
+				value=$(echo "$value" | sed -E "s/^'(.*)'$/\1/g")
+			fi
+			
+			# maybe add key to key list
+			local -n out_section_key_list="${var_prefix}__${section_name}__key_list"
+			local found="no"
+			for k in ${out_section_key_list[*]:-}; do
+				if [[ "$k" == "$key" ]]; then found="yes"; break; fi
+			done
+			if [[ "$found" != "yes" ]]; then
+				out_section_key_list=(${out_section_key_list[@]:-""} "$key")
+			fi
+			
+			# set value in section map
+			local -n out_section_map="${var_prefix}__${section_name}"
+			out_section_map[$key]="$value"
+		continue; fi
+		
+		
+		## UNKNOWN ##
+		ini_log_error "Unknown config string '$line'"
+	done < "$path"
+}
+
+
+
+#
+# HELPER: try calling external logger, else use fallback.
+#
+# @param $1		Message to print.
+#
+ini_log_debug(){
+	if [[ "$(type -t log_debug)" == "function" ]]; then log_debug "$1"; return; fi
+	echo "[DEBUG] $1" 1>&2
+}
+ini_log_info(){
+	if [[ "$(type -t log_info)" == "function" ]]; then log_info "$1"; return; fi
+	echo "[INFO ] $1" 1>&2
+}
+ini_log_warn(){
+	if [[ "$(type -t log_warn)" == "function" ]]; then log_warn "$1"; return; fi
+	echo "[WARN ] $1" 1>&2
+}
+ini_log_error(){
+	if [[ "$(type -t log_error)" == "function" ]]; then log_error "$1"; return; fi
+	echo "[ERROR] $1" 1>&2
+	exit 1
+}