setup

#!/bin/sh
# - Install Python dependencies to `xal/.pypi`, lz4 and pygtrie.
# - Bind if/context.sh to an executable script for performing project operations(if/*).
# - Display basic usage and installation.
PYTHON="${PYTHON-:python3}"
cd "$(dirname "$0")" || exit
export XAL_CONTEXT="$(pwd)"
. ./if/context.sh || exit # test -x xal/setup.

if "$PYTHON" -m pip install --upgrade -t "$XAL_CONTEXT/.pypi" lz4 pygtrie
then
	# Check installation.

	xalfix >&2 .string 'import lz4.version as v; print("lz4:", v.version)'
	if test $? -ne 0
	then
		echo >&2 "WARNING: LZ4 is required for mozilla's lz4json files."
	fi

	xalfix >&2 .string 'import pygtrie; print("pygtrie:", pygtrie.__version__)'
	if test $? -ne 0
	then
		echo >&2 "WARNING: pygtrie is required for prefix filtering."
	fi
fi

# Unconditionally install as .bin/xal; allow user to make links as desired.
TARGET="$XAL_CONTEXT/.bin/xal"
mkdir -p "$XAL_CONTEXT/.bin"
touch "$TARGET" && chmod a+x "$TARGET"
cat >"$TARGET" <<EOF
#!/bin/sh
SCRIPT="\$0"
export XAL_CONTEXT='${XAL_CONTEXT}'
. "\$XAL_CONTEXT/if/context.sh"
xalcmd "\$@"
EOF

# Note usage and installation.
(
	echo
	echo "Direct Usage[execution without PATH modifications]:"
	echo "  env '-P$(dirname "$TARGET")' xal command ..."
	echo "Install[or any directory in PATH]:"
	echo "  ln -sfh '$TARGET' ~/.bin/"
	echo
	echo ">>> xal help"
) >&2 && "$TARGET" help