configdump/json-info-boards: revamp, all-JSON now; use_board=yes skip_kernel=no for config; refactor & use new Python bash-declare-to-JSON utility

- use new capture'd vars scheme
- so `./compile.sh BOARD=xxx BRANCH=yyyy config-dump-json | jq .` now works and is consistent/newline tolerant
- introduce internal `skip_host_config=yes` for `prep_conf_main_minimal_ni()` to skip calling `check_basic_host()`

lib/tools/common/bash_declare_parser.py

@@ -0,0 +1,79 @@
+#!/usr/bin/env python3
+#
+# SPDX-License-Identifier: GPL-2.0
+#
+# Copyright (c) 2022-2023 Ricardo Pardini <ricardo@pardini.net>
+#
+# This file is a part of the Armbian Build Framework
+# https://github.com/armbian/build/
+#
+import logging
+import re
+
+log: logging.Logger = logging.getLogger("bash_declare_parser")
+
+REGEX_BASH_DECLARE_DOUBLE_QUOTE = r"declare (-[-xr]) (.*?)=\"(.*)\""
+REGEX_BASH_DECLARE_SINGLE_QUOTE = r"declare (-[-xr]) (.*?)=\$'(.*)'"
+
+
+class BashDeclareParser:
+	def __init__(self, origin: str = 'unknown'):
+		self.origin = origin
+
+	def parse_one(self, one_declare):
+		all_keys = {}
+		count_matches = 0
+
+		# Now parse it with regex-power! it only parses non-array, non-dictionary values, double-quoted.
+		for matchNum, match in enumerate(re.finditer(REGEX_BASH_DECLARE_DOUBLE_QUOTE, one_declare, re.DOTALL), start=1):
+			count_matches += 1
+			value = self.parse_dequoted_value(match.group(2), self.armbian_value_parse_double_quoted(match.group(3)))
+			all_keys[match.group(2)] = value
+
+		if count_matches == 0:
+			# try for the single-quoted version
+			for matchNum, match in enumerate(re.finditer(REGEX_BASH_DECLARE_SINGLE_QUOTE, one_declare, re.DOTALL), start=1):
+				count_matches += 1
+				value = self.parse_dequoted_value(match.group(2), self.armbian_value_parse_single_quoted(match.group(3)))
+				all_keys[match.group(2)] = value
+
+		if count_matches == 0:
+			log.error(f"** No matches found for Bash declare regex (origin: {self.origin}), line ==>{one_declare}<==")
+
+		return all_keys
+
+	def parse_dequoted_value(self, key, value):
+		if ("_LIST" in key) or ("_DIRS" in key) or ("_ARRAY" in key):
+			value = self.armbian_value_parse_list(value, " ")
+		return value
+
+	def armbian_value_parse_double_quoted(self, value: str):
+		# replace "\\\\n" with actual newline
+		value = value.replace('\\\\n', "\n")
+		value = value.replace('\\\\t', "\t")
+		value = value.replace('\\\"', '"')
+		return value
+
+	def armbian_value_parse_single_quoted(self, value: str):
+		value = value.replace('\\n', "\n")
+		value = value.replace('\n', "\n")
+		value = value.replace('\\t', "\t")
+		value = value.replace('\t', "\t")
+		return value
+
+	def armbian_value_parse_list(self, item_value, delimiter):
+		ret = []
+		for item in item_value.split(delimiter):
+			ret.append((item))
+		# trim whitespace out of every value
+		ret = list(map(str.strip, ret))
+		# filter out empty strings
+		ret = list(filter(None, ret))
+		return ret
+
+	def armbian_value_parse_newline_map(self, item_value):
+		lines = item_value.split("\n")
+		ret = []
+		for line in lines:
+			ret.append(self.armbian_value_parse_list(line, ":"))
+		return ret