#!/bin/bash

# Clone a given branch of pencil and test it
# Note that a local path can also be specified to --repo
# Example usage:
# pc_isolated-test --branch master --repo "file:///home/kishore/pencil-code" --auto-test-options "--max-level=1 --time-limit=5m"
#
# DANGER: things can break horribly if you edit this script while it is running.

# BEGIN option parsing
#https://stackoverflow.com/questions/192249/how-do-i-parse-command-line-arguments-in-bash/29754866#29754866
set -o errexit -o pipefail -o noclobber -o nounset

LONGOPTS=branch:,auto-test-options:,repo:
OPTIONS=b:o:r:

PARSED=$(getopt --options=$OPTIONS --longoptions=$LONGOPTS --name "$0" -- "$@") || exit 2
eval set -- "$PARSED"

auto_test_options="--max-level=1"
branchname=master
repo="https://pencil-code.org/git"
while true; do
    case "$1" in
        -b|--branch)
            branchname=$2
            shift 2
            ;;
        -o|--auto-test-options)
            auto_test_options=$2
            shift 2
            ;;
        -r|--repo)
            repo=$2
            shift 2
            ;;
        --)
            shift
            break
            ;;
        *)
            echo "Error in parsing options"
            exit 3
            ;;
    esac
done
# END option parsing

sanitized_repo_name=$(echo $repo | tr -d ':/') #remove characters which would cause problems in folder names.
tmpdir=~/.cache/pc_isolated_test
foldername="pencil-code-$branchname-$sanitized_repo_name"

set -e

if ! test -e "$tmpdir"; then
    mkdir -p "$tmpdir"
fi
cd "$tmpdir"

if test -e "$foldername"; then
    echo "Destination folder exists; assuming repo has already been cloned"
    cd $foldername
    git fetch --depth=1
    git reset --hard "origin/$branchname"
else
    git clone --depth=1 --branch "$branchname" "$repo" "$foldername"
    cd "$foldername"
    git remote set-branches origin "$branchname"
fi

#Start with a clean environment to avoid conflicts with already-enabled versions of Pencil
# env -i bash --norc << EOF #Even $HOME is not set here, which causes problems.
env -u PATH -u _sourceme -u PYTHONPATH bash --norc << EOF

export PENCIL_HOME=$(pwd)
_sourceme_quiet=1; . $PENCIL_HOME/sourceme.sh; unset _sourceme_quiet

pc_auto-test --auto-clean $auto_test_options

EOF