#!/usr/bin/env bash
###############################################################
# This is the Cake bootstrapper script that is responsible for
# downloading Cake and all specified tools from NuGet.
###############################################################

# Define directories.
SCRIPT_DIR=$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )
TOOLS_DIR=$SCRIPT_DIR/../.tools
export NUGET_EXE=$TOOLS_DIR/nuget.exe
CAKE_EXE=$TOOLS_DIR/Cake/Cake.exe
PACKAGES_CONFIG=$SCRIPT_DIR/packages.config

# Define default arguments.
SCRIPT="build.cake"
VERBOSITY="verbose"
DRYRUN=
SHOW_VERSION=false
SCRIPT_ARGUMENTS=()

# Parse arguments.
for i in "$@"; do
    case $1 in
        -s|--script) SCRIPT="$2"; shift ;;
        -v|--verbosity) VERBOSITY="$2"; shift ;;
        -d|--dryrun) DRYRUN="-dryrun" ;;
        --version) SHOW_VERSION=true ;;
        --) shift; SCRIPT_ARGUMENTS+=("$@"); break ;;
        *) SCRIPT_ARGUMENTS+=("$1") ;;
    esac
    shift
done

# Make sure the tools folder exist.
if [ ! -d "$TOOLS_DIR" ]; then
  mkdir "$TOOLS_DIR"
fi

# Download NuGet if it does not exist.
if [ ! -f "$NUGET_EXE" ]; then
    echo "Downloading NuGet..."
    curl -Lsfo "$NUGET_EXE" https://dist.nuget.org/win-x86-commandline/v3.3.0/nuget.exe
    if [ $? -ne 0 ]; then
        echo "An error occured while downloading nuget.exe."
        exit 1
    fi
fi

# Restore tools from NuGet.
pushd "$TOOLS_DIR" >/dev/null
mono "$NUGET_EXE" install "$PACKAGES_CONFIG" -ExcludeVersion -OutputDirectory "$TOOLS_DIR"
if [ $? -ne 0 ]; then
    echo "Could not restore NuGet packages."
    exit 1
fi
popd >/dev/null

# Make sure that Cake has been installed.
if [ ! -f "$CAKE_EXE" ]; then
    echo "Could not find Cake.exe at '$CAKE_EXE'."
    exit 1
fi

# Start Cake
if $SHOW_VERSION; then
    exec mono "$CAKE_EXE" -version
else
    exec mono "$CAKE_EXE" $SCRIPT -verbosity=$VERBOSITY $DRYRUN "${SCRIPT_ARGUMENTS[@]}"
fi