#! /bin/bash
# vim: set tabstop=4 shiftwidth=4 noexpandtab filetype=sh:

# setup/index.txt - upgrade path from Ivan's a2server tree
#
# Ivan's a2server installed with a single copy-paste of a command line that
# downloaded a script and ran it sight-unseen.  People are going to continue
# to run that command (they shouldn't, but they will), and we can support
# them doing it for now.

a2sBranch="master"
a2sScriptURL="https://raw.githubusercontent.com/RasppleII/a2server/${a2sBranch}"
a2sTarball="https://github.com/RasppleII/a2server/archive/${a2sBranch}.tar.gz"

# Set top_src to the location of the source tree if we're running in one
top_src="$( dirname "${BASH_SOURCE[0]}" )/.."
if [[ -f "$top_src/.a2server_source" ]]; then
	pushd $top_src >/dev/null
	top_src="$PWD"
	popd >/dev/null

	cat <<-EOT
	This script exists solely for backward-compatibility with IvanX's a2server
	website and aliases installed by older versions.  You appear to have an
	a2server source directory here:
	 	$top_src

	Please run ./install.sh in that directory.  Thanks!

	EOT
	exit 1
fi

# Find the version in the install script
newVersion=$(wget -qO- "${a2sScriptURL}/install.sh" | grep '^a2serverVersion' | cut -d '"' -f 2)

# It almost never is, but this script could be run with command line arguments,
# of which -y we can use, so we should check for it.  We'll pass them all to
# the install script later
autoAnswerYes=
for arg in $@; do
	if [[ $arg == "-y" ]]; then
		autoAnswerYes=1
		break
	fi
done

cat <<EOT

Hello, you've reached the single wget command version of the a2server install
script.  This script is being phased out for a number of reasons.  The most
important is that it is not repeatable.  This script will download things
behind the scenes, run them without much verification, and then delete what it
ran, no matter if the installation finished successfully or not.  The next
time you run the same command, you may get a different (hopefully better)
version.

Right now, a2server ${newVersion} is available.

If you are seeing this text, iKarith (Joseph Carter) hasn't bothered to write
publicly-facing end-user documentation for downloading and installing a2server
a more preferred way.  He's filed an issue about this, please do follow the
instructions there:
	https://github.com/RasppleII/a2server/issues/60

For now, this script does what the old installer used to.

EOT

if [[ ! $autoAnswerYes ]]; then
	printf "Do you want to install a2server with this script? "
	read
	if [[ ${REPLY:0:1} != "y" && ${REPLY:0:1} != "Y" ]]; then
		printf "\nOkay, not installing anything now!\n\n"
		exit 1
	fi
fi

top_src=$(mktemp -d /tmp/a2server.XXXXXXXXXXXX)

# Normally tarballs unpack in a subdirectory, but we want it to unpack into
# $top_src directly (even though the directory has the tarball in it.)
printf "\na2server: Downloading installer to $top_src.\n"
wget -O "$top_src/a2server-$a2sBranch.tar.gz" "$a2sTarball"
tar -C $top_src --strip-components=1 -zxf "$top_src/a2server-${a2sBranch}.tar.gz"

# Now we actually run the installer as if we were installing it by hand
printf "\na2server: Running the installer now.\n"
"${top_src}/install.sh" "$@"

# Clean up and delete the installer we downloaded
printf "\na2server: Finished with installer, now deleting ${top_src}.\n"
rm -rf "$top_src"