#!/bin/bash

# Posix install script for the Cobra programming language.
# For use on Mac OS X, Linux, BSD and other UNIX-like operating systems.
#
# Installs Cobra to /usr/local/cobra/cobra-X.Y.Z and makes a /usr/local/cobra/current link to it.
# Also adds a link from /usr/bin/cobra-X.Y.Z to the new current cobra command line executable, and
# makes a /usr/bin/cobra link to that.
#
# You should probably run this as root with "sudo ./install" or:
#   su -
#   ./install
#
# After installing, you should be able to run this at the command line as any user:
#   cobra -h
#
# It's okay to rerun this install script.
# It's okay to have multiple versions of Cobra on the same machine.
#
# You can tweak variables below to change where Cobra is installed to if you don't want the defaults.
#
# See also: http://cobralang.com


# Configuration variables

TOP_INSTALL_DIR=/usr/local
BIN_DIR=/usr/bin


# Other variables 

VERSION=0.8.0
SOURCE_DIR=`dirname $0`


# for testing out of the workspace
if [ -d ../Source ]; then
	SOURCE_DIR=../Source
	rm -rf $SOURCE_DIR/*exception-report*.html
	rm -rf $SOURCE_DIR/r-*
	rm -rf $SOURCE_DIR/*.mdb
	rm -rf $SOURCE_DIR/*.pdb
	SOURCE_DIR=../
	USING_WORKSPACE='1'
else
	USING_WORKSPACE=''
fi


# Get started

echo "Cobra Programming Language $VERSION"
echo "POSIX Installer"
echo
echo "System is:"
uname -rsv
echo

echo "Checking for Novell Mono..."
MONO=`which mono`
if [ -z "$MONO" ]; then
	echo "Cannot find 'mono'. Please download and install from http://www.mono-project.com/"
	# TODO: check for Portable.NET
	exit 1
fi
echo Found `mono --version | head -1`
echo

# TODO: check mono min version 1.2.4


# Check for bad variables

if [ -z "$VERSION" ]; then
	echo "error: VERSION is empty."
	exit 1
fi

if [ -z "$TOP_INSTALL_DIR" ]; then
	echo "error: TOP_INSTALL_DIR is empty."
	exit 1
fi

if [ -z "$SOURCE_DIR" ]; then
	echo "error: SOURCE_DIR is empty."
	exit 1
fi

if [ ! -d "$SOURCE_DIR" ]; then
	echo "error: Cannot find source directory: $SOURCE_DIR"
	exit 1
fi

if [ ! -d "$TOP_INSTALL_DIR" ]; then
	echo "error: Cannot find install directory: $TOP_INSTALL_DIR"
	exit 1
fi

INSTALL_DIR="$TOP_INSTALL_DIR/cobra"

echo "Will install to $INSTALL_DIR and $BIN_DIR"
echo

# Copy files, etc.

echo "Copying files to $INSTALL_DIR/cobra-$VERSION..."
mkdir -p "$INSTALL_DIR"
rm -rf "$INSTALL_DIR/cobra-$VERSION"
cp -pr "$SOURCE_DIR" "$INSTALL_DIR/cobra-$VERSION"

CURRENT="$INSTALL_DIR/current"
echo "Creating link at $CURRENT..."
rm -rf "$CURRENT"
ln -s "$INSTALL_DIR/cobra-$VERSION" "$CURRENT"

if [ -d "$INSTALL_DIR/cobra-$VERSION/Source" ]; then
# if testing out of the workspace then
	mv "$INSTALL_DIR/cobra-$VERSION/Source" "$INSTALL_DIR/cobra-$VERSION/bin"
fi

echo "Finishing up..."

CMD="$INSTALL_DIR/cobra-$VERSION/bin/cobra"
if [ ! -f "$CMD" ]; then
	echo "error: cannot find 'cobra' at $CMD"
fi

chmod -R a+rX "$TOP_INSTALL_DIR"


# Set up executable links

if [ -n "$BIN_DIR" ]; then
	rm -f "/usr/bin/cobra-$VERSION"
	ln -s "$INSTALL_DIR/cobra-$VERSION/bin/cobra" "$BIN_DIR/cobra-$VERSION"
	chmod -R a+rx "$BIN_DIR/cobra-$VERSION"
	rm -f "$BIN_DIR/cobra"
	ln -s "$INSTALL_DIR/cobra-$VERSION/bin/cobra" "$BIN_DIR/cobra"
	chmod -R a+rx "$BIN_DIR/cobra"
fi


# Show what Cobra files are now present

echo
echo "Cobra file listings:"
echo
cmd="ls -l $INSTALL_DIR"
echo $cmd
$cmd

echo
echo "ls -l $BIN_DIR/cobra*"
ls -l "$BIN_DIR"/cobra*


# Done!

echo
echo "Finished installing."