Auto updates: add support for source arrays.

[TomJo2000]

I'd also like to try and make an auto-update function for this.
But I'll need to think of a good way to query the latest major version of the Kernel for that.
Maybe git ls-remote on Linus' tree?

[TomJo2000]

scripts/updates/utils/termux_pkg_upgrade_version.sh doesn't currently "support" version arrays.
So this works by adding a stupid little work around to make it work with the first line of an array.
I'll borrow some code from lint-packages when I add array support "properly".

termux-packages/scripts/lint-packages.sh

Lines 73 to 120 in 89853e9

	check_indentation() {
	local pkg_script="$1"
	local line='' heredoc_terminator='' in_array=0 i=0
	local -a issues=('' '') bad_lines=('FAILED')
	# parse leading whitespace
	while IFS=$'\n' read -r line; do
	((i++))
	# make sure it's a heredoc, not a herestring
	if ! [[ "$line" == *'<<<'* ]]; then
	# Skip this check in entirely within heredocs
	# (see packages/ghc-libs for an example of why)
	[[ "$line" =~ [^\(]\<{2}-?[\'\"]?([^\'\"]+) ]] && {
	heredoc_terminator="${BASH_REMATCH[1]}"
	}
	(( ${#heredoc_terminator} )) && \
	grep -qP "^\s*${heredoc_terminator}" <<< "$line" && {
	heredoc_terminator=''
	}
	(( ${#heredoc_terminator} )) && continue
	fi
	# check for mixed indentation
	grep -qP '^(\t+ +| +\t+)' <<< "$line" && {
	issues[0]='Mixed indentation'
	bad_lines[$i]="${pkg_script}:${i}:$line"
	}
	[[ "$line" == *'=('* ]] && in_array=1
	if (( ! in_array )); then # spaces for indentation are okay for aligning arrays
	grep -qP '^ +' <<< "$line" && { # check for spaces as indentation
	issues[1]='Use tabs for indentation'
	bad_lines[$i]="${pkg_script}:${i}:$line"
	}
	fi
	[[ "$line" == *')' ]] && in_array=0
	done < "$pkg_script"
	# if we found problems print them out and throw an error
	(( ${#issues[0]} || ${#issues[1]} )) && {
	printf '%s\n' "${bad_lines[@]}"
	printf '%s\n' "${issues[@]}"
	return 1
	}
	return 0
	}

[TomJo2000]

Making this a draft since apparently this has turned into "add array support to auto updates".